The Rocks Issue
asphaltPRO PRODUCTION – PROFESSIONALS – PRODUCTS
Sherwood Construction Plants Its Future Control
• How to Unplug Screens • Top 10 Issues Shaping Mining • Crystal Coast Sparkles with Asphalt • Schedule Lab Equipment Calibration
Meet NSSGA’s President & CEO AUGUST 2018 WWW.THEASPHALTPRO.COM
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CONTENTS
asphaltPRO august 2018
departments
22
Editor’s Letter
6 — The EIS Gets Streamlined, Accountable
AROUND THE GLOBE 8
SAFETY SPOTLIGHT
10 – Protect Your Hearing Now By Sarah Redohl
TRAINING
12 – Train New Operators to Unplug Screens By Sandy Lender
MIX IT UP
16 – Calibrate Your Lab Equipment on Schedule By Sandy Lender
SOLVE YOUR PROBLEM
18 – Solve Poor Milling Patterns By AsphaltPro Staff
16
58
PRODUCER PROFILE
22 – Sherwood Construction Controls Interests Oklahoma contractor takes asphalt matters into its own hands on turnpike project By Larry Trojak
PAVEMENT MAINTENANCE
28 – Florida Tackles Premature Failures of HFSTs By FP2
28
PROJECT MANAGEMENT 32 – Wooten Makes Quality King on Crystal Coast Airport By Robert Len Hunt Jr.
MEET THE NATIONAL EXEC
36 – Meet NSSGA’s Michael W. Johnson By Sarah Redohl
PRODUCT GALLERY
48 – More Than Heavy Equipment Influences Your Paving Profit By AsphaltPro Staff
NEW TECH
58 – Cat, Volvo Invest in Remote Control Capabilities By Sarah Redohl
HERE’S HOW IT WORKS
62 – Diamond Products’ PC1504 Pavement Grinder & Groover 66 – Diamond Road’s Smoother
Feature articles 40 – Lower Costs with Mobile Equipment By AsphaltPro Staff 44 – Top 10 Issues to Shape Mining From Volvo CE 46 – How to Create a Structure that Keeps Materials Dry By Jessica Batchelor
The Rocks Issue
asphaltPRO PRODUCTION – PROFESSIONALS – PRODUCTS
Sherwood Construction Plants Its Future Control
• How to Unplug Screens • Top 10 Issues Shaping Mining • Crystal Coast Sparkles with Asphalt • Schedule Lab Equipment Calibration
Meet NSSGA’s President & CEO AUGUST 2018 WWW.THEASPHALTPRO.COM
on the cover Sherwood Construction elected to take control of its own destiny with the purchase of a portable asphalt plant. See related article on page 22. Photo courtesy Asphalt Drum Mixers, Huntertown, Indiana.
editor’s Letter The EIS Gets Streamlined, Accountable
Wouldn’t it be great if your doctor had to pay you a fine for making you wait past your scheduled appointment time? We’ve all thought about it. You’re held hostage to his or her authority while you wait, unable to move forward with your day, your job, your life… Apply this aggravation to something much grander. Imagine, if you will, you’ve financed the purchase of a large piece of equipment to undertake a highway project for which you won the bid at the beginning of one construction season. Now you wait on environmental reviews, authorizations, inter-agency double-speak and red tape, before you can break ground. Equipment payments are due. Workers need paychecks. The utility bills don’t stop because the OMB hasn’t issued guidance yet. There’s finally good news on this front. The policy of One Federal Decision (OFD) requires a lead Federal agency to not only develop a permitting timetable for major infrastructure projects; it also requires that agency to follow the timetable. Let me quote a fact: “Each major infrastructure project shall have a lead Federal agency, which shall be responsible for navigating the project through the Federal environmental review and authorization process, including the identification of a primary Federal point of contact at each Federal agency. All Federal cooperating and participating agencies shall identify points of contact for each project, cooperate with the lead Federal agency point of contact, and respond to all reasonable requests for information from the lead Federal agency in a timely manner.” That is from the Federal Register Volume 82, Number 163, Executive Order 13807 of Aug. 15, 2017. That EO established “Discipline and Accountability in the Environmental Review and Permitting Process for Infrastructure Projects.” Its overarching goal, as stated in the document, is “to ensure that the Federal environmental review and permitting process for infrastructure projects is coordinated, predictable, and transparent.” As a sea turtle conservationist, I’m inclined to investigate such things closely. Let’s face it; I carry my own multi-use, stainless steel straws to keep those unsustainable, single-use straws out of the ecosystem. When someone, whether he’s the President of the free world or not, suggests we skip steps in environmental review, I get nervous. Here’s the thing: if you read all nine pages of EO 13807, which is not hard to do, you’ll see, as I did, that no one will be allowed to skip steps in anything. In fact, steps are being made transparent and streamlined. Section 2, letters f through h, state: “It is the policy of the Federal Government to conduct environmental reviews and authorization processes in a coordinated, consistent, predictable, and timely manner in order to give public and private investors the confidence necessary to make funding decisions for new infrastructure projects; speak with a coordinated voice when conducting environmental reviews and making authorization decisions; and make timely decisions with the goal of completing all Federal environmental reviews and authorization decisions for major infrastructure projects within 2 years.” There it is. Environmental review processes for infrastructure projects aren’t supposed to be mired in red tape for a decade or so while a water system’s pipes disintegrate into the water supply or a city’s traffic backs up to the next county. The OFD policy has its own Memorandum of Understanding, in which the Office of Management and Budget and the Council on Environmental Quality worked with the Federal Permitting Improvement Steering Council to come up with a framework to implement EO 13807. They issued, March 20, the “One Federal Decision Framework for the Environmental Review and Authorization Process for Major Infrastructure Projects Under Executive Order 13807” (OFD Framework), which is free to download. It spells out, among many points, that a project will have a lead agency, which will be responsible for organizing the Federal environmental review. That agency will get everyone else to cooperate. That agency will set the permitting timetable. And that agency will prepare the environmental impact statement (EIS). That sounds like accountability to me. And it sounds like getting work done. Finally. Stay Safe,
Sandy Lender
6 // august 2018
August 2018 • Vol. 11 No. 10
asphaltPRO
602 W. Morrison, Box 6a • Fayette, MO 65248
(573) 823-6297 • www.theasphaltpro.com GROUP PUBLISHER Chris Harrison chris@ theasphaltpro.com PUBLISHER Sally Shoemaker sally@theasphaltpro.com (573) 823-6297 EDITOR Sandy Lender sandy@theasphaltpro.com (239) 272-8613 ASSOCIATE EDITOR Sarah Redohl sarah@theasphaltpro.com (573) 355-9775 MEDIA SALES Cara Owings cara@theasphaltpro.com (660) 537-0778 ART DIRECTOR Kristin Branscom BUSINESS MANAGER Susan Campbell (660) 728-5007
AsphaltPro is published 11 times per year. Writers expressing views in AsphaltPro Magazine or on the AsphaltPro website are professionals with sound, professional advice. Views expressed herein are not necessarily the same as the views of AsphaltPro, thus producers/contractors are still encouraged to use best practices when implementing new advice. SUBSCRIPTION POLICY: Individual subscriptions are available without charge in the United Sates, Canada and Mexico to qualified individuals. One year subscription to non-qualifying Individuals: United States $90, Canada and Mexico $125.00. For the international digital edition, visit theasphaltpro.com/subscribe/.
around the globe
Industry News and Happenings from Around the World CHILE
U.S. Ambassador to Chile Carol Z. Perez presented Eriez®, Erie, Pennsylvania, with the Export Leadership Award during Expomin 2018 in Santiago in June. “Eriez has exported products to Chile since the 1950s,” Export Sales Director Andrew Goldner said. He said the majority of the products Eriez exports to Chile are used mainly in the mining industry.
ENGLAND
While your AsphaltPro staff prepared this “Rocks” issue, crushing and quarry management equipment suppliers held their biennial event in Derbyshire, England, June 26 through 28. Tarmac’s Hillhead Quarry is the site for more than 500 exhibitors and vendors to share the latest in aggregates processing with more than 18,000 attendees every other summer.
SWEDEN
The shares of Epiroc AB, have started trading on Nasdaq Stockholm in Sweden. This marks the start of Epiroc as a fully independent company following its separation from the Atlas Copco Group. Epiroc also launched its new U.S. website this spring. Visit www.epiroc.us.
SWITZERLAND
Leica Geosystems, part of Hexagon of Heerbrugg, Switzerland, announced June 12 its latest unmanned aerial vehicle (UAV) system. The Leica Aibot is based on DJI’s aerial platform, the M600 Pro, to autonomously acquire mobile 3D mapping data.
ALABAMA
The National Center for Asphalt Technology (NCAT) released in June its technical report 18-01: Material Selection Guidance for Asphalt Pavement Design. The 62-page document is available as a downloadable pdf at https://bit.ly/2yvbohK. 8 // august 2018
ARIZONA
CASE Construction Equipment of Racine, Wisconsin, and heavy equipment dealers Titan Machinery and Sonsray Machinery, donated the use of skid steers, a compact track loader and an excavator to veteran-led disaster response organization Team Rubicon for Operation Big Iron—a disaster cleanup operation—in response to the “Tinder Fire,” which swept across more than 500 acres in Coconino County, Arizona. Team Rubicon volunteers provided heavy equipment operations, debris removal and sawyer services to affected communities. The organization deployed 40 members who logged a total of 2,592 hours on the operation. Team Rubicon’s heavy equipment operators used the equipment to help move more than 54,130 cubic feet of debris. Volunteers saved the community an estimated total of $74,784.38 in cleanup, materials and labor.
CALIFORNIA
Takeuchi-US, based in Atlanta, announced Clairemont Equipment, based in San Diego, as a new dealer serving southern California.
MINNESOTA
ASV Holdings Inc., Grand Rapids, Minnesota, has added Northwoods Hydraulic and Equipment of Moose Lake to its dealer network. The company will offer all ASV Posi-Track® compact track loaders and ASV’s full line of skid steer loaders. Check them out at northwoodsequip.com.
NEW JERSEY
ALLU Inc., East Brunswick, New Jersey, launched its new ALLU Mobile Application, which is fully integrated with ALLU’s online portal. For customers who provide the serial number associated with their new ALLU Transformers and Processors, the ALLU Mobile App will retrieve data relevant to the equipment, such as product description, base machine info, access to pictures and videos, and operational, installation, troubleshooting, and safety guides.
TENNESSEE You can win a trip to the 2019 Indianapolis 500® courtesy Firestone, a tire brand of Bridgestone Americas Inc., Nashville, and the official tire of the Verizon IndyCar® Series. Off-the-road customers are invited to enter a sweepstakes via www.versabuiltotr.com to win round-trip airfaire for two, hotel accommodations for three nights and two tickets to the 103rd Running of “The Greatest Spectacle in Racing®” May 26, 2019. Your deadline to enter is Sept. 17, 2018. Good luck!
WASHINGTON Zonar Systems, headquartered in Seattle, has added the Samsung Galaxy Tab E Tablet to its mobile portfolio to give commercial fleet managers critical information such as vehicle health and driver hours of service (HoS). This also provides a solution to manage compliance with industry regulations, such as the electronic logging device (ELD) requirements.
WASHINGTON, D.C. Pete Ruane, president and chief executive officer of the American Road & Transportation Builders Association (ARTBA), announced June 19, he will retire from the organization in October after 30 years of service. ARTBA Executive Vice President & CEO William D. Toohey Jr., a 33-year ARTBA veteran, will serve as acting CEO until the new top executive appointment is made and transitioned.
WISCONSIN The Association of Equipment Manufacturers (AEM) has elected Vice President Americas & Europe Distribution Services Division of Caterpillar Inc. Philip Kelliher to the AEM board of directors, and has elected Vice President Building Construction Products Division of Caterpillar Inc. Anthony Fassino to the CE sector board.
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safety spotlight
Protect Your Hearing Now H
Have you heard the old fable about boiling a frog? It goes something like this: if you drop a frog into boiling water, it will immediately jump out. But, if you place it in tepid water and slowly bring it to a boil, the frog will not perceive the rising temperature. However morbid the metaphor may be, it can teach us a thing or two about our unwillingness to react to threats that arise slowly. For example, hearing loss. Hearing loss is one of the most common work-related illnesses in the United States, according to the Centers for Disease Control and Prevention. And half of construction workers have some job-related hearing problem, including hearing loss or tinnitus (hearing a ringing, whistling, buzzing or humming noise all the time). In a recent study, the Center for Construction Research and Training (CWPR) discovered that one in four construction workers needs to shout on the job site “often” or “all the time”—signs that the job site is too loud—but nearly two thirds don’t wear personal protective equipment (PPE) during these times. In fact, it’s common for a construction worker to have the hearing of a worker twice his age, meaning a 25-year-old construction worker has the hearing of a 50-year-old. During the study, older workers also reported that it was often difficult to make younger workers believe that hearing loss was a real threat. Like a frog in boiling water, young construction workers don’t realize they’re in danger until it’s too late. “Most [construction] workers think too much noise is just part of the job and that nothing can be done about it,” said CWPR’s Director of Environmental Hazard Training Gary Gustafson, “but we know that’s not the case.” That’s why they decided to launch new online training tools covering why noise and hearing loss is an important issue for construction workers, the signs and effects of hearing loss, common types and sources of hazardous noises, how to measure noise, ways to control noise exposure, and types of hearing protection.
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According to NIOSH’s Hierarchy of Controls, wearing PPE is the least effective method to reduce noise exposure. However, if other methods aren’t possible, PPE may be required to meet OSHA’s requirements. Source: NIOSH The training resources include a onehour and a 30-minute module, alongside in-class and hands-on exercises and helpful handouts, for use as a stand-alone class or as part of a larger Occupational Safety and Health Administration (OSHA) training session.
Visit http://bit.ly/2KD2AMz to check out the training resources. Although we recommend incorporating those resources into your training sessions and toolbox talks, here are a few immediate actions you can take to preserve your hearing and that of your crew.
IDENTIFYING YOUR OWN HEARING LOSS
One of the most significant challenges is convincing workers that noise is a hazard to their hearing. Not only can hearing loss affect your long term health, it can also make it more difficult to hear warning signals on the job site and,
since your hearing is tied to your equilibrium or balance, can increase the risk of falling. It can also contribute to loneliness and depression; lead to nervousness, sleeplessness, and fatigue; and increase stress, blood pressure, hypertension, and cardiovascular disease. Although there are a number of causes of hearing loss, including age, heredity and headphone use, the number one cause is exposure to loud noises. To illustrate to workers how their hearing may have already been affected by noise on the job site, CWPR recommends asking these questions: • Do you have trouble hearing people talking when there is background noise? • Do people sound like they’re mumbling? • How often do you have to ask people to repeat what they say? • Do you turn up the radio or TV a lot? • Do you have trouble hearing people talking on the phone? • Do you have a constant ringing in your ears?
“Most [construction] workers think too much noise is just part of the job and that nothing can be done about it, but we know that’s not the case.”—Gary Gustafson Gustafson said another sign of hearing loss is difficulty hearing high pitch frequencies and differentiating words that sound alike. Try this exercise: Right before work, turn down the radio in your car to the lowest volume at which you can still hear it. If you need to turn the radio up to hear it when you hop back into your car after work, it’s a sign that you’ve been exposed to hazardous noise levels throughout the day. Within the modules, there’s also an exercise, “What Does Hearing Loss Sound Like,” in which you’ll hear a number of noises at various stages of hearing loss to illustrate what may be in store for you if you don’t take precautions to protect your hearing.
IDENTIFYING NOISE HAZARDS ON THE JOB
“One thing we wanted to express to trainees is that hearing loss isn’t just caused by one event,” Gustafson said. The damage to your hearing depends on how loud the noise is and how long you’ve been exposed to it. OSHA’s permissible exposure limits (PEL) for noise are up to 90 decibels for up to eight hours a day in construction, 95 dB for up to four hours, 100 dB for two hours, 105 dB for one hour, 110 dB for 30 minutes, and 115 dB for 15 minutes. According to a report from CPWR, construction workers are exposed to noise levels above the National Institute for Occupational Safety and Health (NIOSH) recommended exposure limits of 85 decibels 73 percent of the time they’re working.
For reference, a normal conversation is about 60 dB, a hand drill is 98 dB, a spray painter is 105 dB, and a pneumatic precision drill is 119 dB.
Visit NIOSH’s powertools database at http://bit.ly/2tZYK5T to learn how loud other tools may be: There are a number of tests you can perform at your job site to determine if it’s too loud. For example, ask yourself these questions: • Do you have to shout to be heard at arm’s length away? • Do you have to turn off equipment to be heard? • Do you have to move to another location to talk and be heard? • Do you turn up the car radio at the end of the day? Another method would be to use a personal dosimeter, an in-ear dosimeter or a sound level meter to measure noise on your job site. You can also use NIOSH’s Sound Level Meter app for iPhones or the Sound Meter app for Android devices. “The sound level meter apps aren’t as accurate as the other equipment, but they’re readily available and keep improving,” Gustafson said.
LIMITING NOISE ON THE JOB SITE
There are a number of ways to control construction noise. In decreasing levels of effectiveness, methods include eliminating the noise, buying quieter equipment and tools, controlling the noise hazard by isolating the source of the noise away from as many workers as possible, limiting how long any employee can work on a task above the recommended exposure time limits, and wearing appropriate PPE. OSHA recommends that employers should identify noisy tasks and develop a plan to control the noise beforehand, do a walk-around every day to ensure the plans are being implemented, monitor noise levels, provide hearing protection, and conduct training on said hearing protection. OSHA also recommends buying quieter equipment, adding that buying a tool
just three decibels quieter will reduce the noise emitted by half. Check out the sidebar, “Choosing the Right PPE,” to determine the best hearing protection options for your crew, and be sure to check out CWPR’s training modules to really dig into the insights and ideas we’ve listed here. It’s never too late—or too early—to start protecting your hearing. – BY SARAH REDOHL
Choosing the Right PPE According to NIOSH’s Hierarchy of Controls, wearing PPE is the least effective method to reduce noise exposure. However, if other methods aren’t possible to implement, PPE may be required to meet OSHA’s requirements. Types of hearing protection include foam earplugs, reusable plugs, custom molded plugs and earmuffs to name a few. You should also look at convenience, comfort, communication needs, hygiene, hearing ability of the worker, noise level and noise reduction needed before choosing a solution. For example, foam plugs are easily available and offer a high level of noise reduction, but can introduce hygiene issues and take time to fit comfortably in the ear. Earmuffs are quick to put on and offer high noise reduction, but are often hot, heavy and cumbersome. You should also pay attention to the Noise Reduction Rating (NRR). This measurement can be found on the earplug package. The higher the number, the greater the protection. You’ll use this number and the noise exposure level of your work site to determine the noise exposure of your crew while wearing PPE. Here’s the equation you’ll use: (NRR-7)/2 = NRR reduction Exposure level - NRR reduction = level of protection If your earplugs have an NRR of 33 and you’re experiencing an exposure level of 95 decibels, your level of protection is 82 decibels.
www.THeAsphaltpro.com // 11
Training
Increasing stroke can “lift” material further from the screen surface. Photo courtesy Eagle Crusher, Galion, Ohio.
Train New Operators to Unplug Screens A
At the asphalt production facility, screening material is part of daily operations. Whether there’s a vibrating grizzly helping get material into proper cold feeds, or you fractionate and dis-agglomerate reclaimed asphalt pavement (RAP) chunks, the equipment operators must be trained to keep inefficiencies at bay. Teach personnel best practices to keep screens from plugging with material during production. The new operator needs to know what a plugged screen means for production and how to fix it. The team at EvoQuip, a Terex Corporation, listed a number of causes for a plugged screen. • Screening a high proportion of near-sized product • Screening particularly round or spherical material
12 // august 2018
• High moisture content • Processing material with contaminants that weave through apertures • Processing very flaky material
PREVENTION = CURE EvoQuip’s screening engineering manager discussed settings to prevent the problem. “EvoQuip’s first recommendation is a proactive step to stop the blocking in the first place,” Ciarán Fanning provided. “In many circumstances, increasing screen amplitude is a great way to begin. Larger strokes will lift near-sized and rounded materials further from the screen surface and thereby prevent plugging of screens from the outset.” Thus, setting large amplitude can help prevent plugging from the start.
If you see that high moisture content is causing material to plug the screen, “it can be effective to increase acceleration, which provides the energy to shake off sticky material,” Fanning shared. Don’t forget you can address plugging through the type of screen media you use. “Another proactive approach which complements the above solutions, and also addresses entanglement and flaky material, is the use of specialist media,” Fanning provided. “For larger apertures, the use of 3D punch plate is a great solution. This type of punch plate is designed to eliminate snagging points from media and also provides screen openings which widen progressively along their depth. This reduces the entanglement risk and ensures that pieces entering an opening has either an easy exit or a broad path to the deck below. On smaller apertures the use of
UNPARALLELED RAP TECHNOLOGY TAKE RECYCLING TO UNPRECEDENTED LEVELS Ammann focuses on technologies that incorporate high percentages of RAP – and considerably reduce operating and materials costs in the process. These technologies aren’t baby steps – they’re significant advances that can greatly impact your business. And they’re PROVEN technologies that are in use at hundreds of plants around the world. Ammann RAP products include: • Counterflow dryers that enable use of 100 percent hot recycled material • Parallel-flow dryers that can use up to 60 percent hot recycled material • Middle ring dryers for the use of up to 40 percent recycled material • Various cold addition systems for the use of 25 to 40 percent recycled material • Retrofit options to start or improve your recycling effort Ammann’s experience gained during the installation of countless recycling systems worldwide will ensure you find the right solution. We have the cost-saving technology, and it’s yours for the asking.
For additional product information and services please visit : www.ammann - group.com PMP-1590-00-EN | © Ammann Group
Training
Every operator, whether new or veteran, must know that lockout/tag-out protocol is non-negotiable at your facility. Before working to clear a screen, the operator must lock out and tag out the equipment. The Colt 1000 from EvoQuip offers a ball deck that can assist in actively unplugging screens. Photo courtesy EvoQuip, a Terex Corporation.
If too much material is passing over the screen, but there is no plugging or blinding, the operation may be feeding too much material across the screen or may be running the screen too fast. Rather than reducing the tonnage, the owner may elect to use a larger screen or add an additional screen downstream to further screen material. Photo courtesy Eagle Crusher, Galion, Ohio. self-cleaning meshes are of great benefit and in extreme circumstances where sticky material clogs the deck, spring steel finger media is a great solution.”
SOLVE THE PROBLEM
No matter how many steps management and operators take to prevent plugging, you may find that too much material is being fed across the screen or production is at a speed that has allowed blinding to creep in. If reducing tonnage overall isn’t an option, you’ll need some other fixes to solve your problem.
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Make sure every operator, whether a new hire or a veteran employee with years of experience, knows that lock-out/tag-out protocol is non-negotiable at your facility. Before inspecting a piece of machinery or working to clear a screen, the operator must lock out and tag out the equipment. Pat Meara, a regional sales manager for Eagle Crusher, Galion, Ohio, gives the next steps for the operator. “If the screen cloth is plugged, the operator will likely have to tap all the plugged material out of the openings, assuming the screen media can handle it. Some
lighter screen media cannot handle the force of a hammer against it. Check with the screen media manufacturer for exact recommendations. Once the media is clear, increasing the stroke of the screen can help reduce plugging. It also may be beneficial to replace the screen media to one better designed for the specific application. Some screen media manufacturers also produce self-cleaning media to reduce or prevent plugging from occurring.” Fanning discussed self-cleaning options as well: “When screen tuning and media selection simply isn’t enough, there are solutions such as self-cleaning decks, also known as ball decks, and other systems to actively unplug screens. These systems typically take the form of trapped rubber balls or cylinders which either sit above or below the media creating continuous impacts ensuring that any plugged object is continually freed.” “If the screen is blinding,” Meara said, “the best first-course of action is to increase the speed of the screen to clear the fine material through more quickly. If that does not help, changing the screen media style or size to assist in clearing the material through the screen should help.” What the experts show is screen plugging or blinding depends on more than mere media type, more than mere screen amplitude, more than mere production speed, more than mere material type. A combination of factors contributes to plugging phenomena during screening, and consulting with your crushing and screening professional or OEM can help you set up training and best practices for your team. – BY SANDY LENDER
Mix it up
Calibrate Your Lab Equipment on Schedule H
Having lab equipment in proper calibration gives you a better chance at proper measurements and testing results. Dan Ridolfi of Lastrada Partners, El Dorado Hills, California, stated the calibration and maintenance of lab equipment is just as important as the calibration and maintenance of the asphalt and aggregate equipment at the plant. “A producer never wants to be in a position of producing material with unknown properties,” he shared. This begs the question of how often a lab tech needs to calibrate equipment. How often does lab equipment “fall out” of calibration or run the risk of giving poor results? Not all pieces require the same level of scrutiny. For example, the North Dakota Department of Transportation spells out, at the end of its documentation for performing bulk specific gravity (Gmb) calculations, “A calibration check of the equipment should be performed annually as a minimum, or whenever damage or repair occurs.”
Maintain Lab Scales • Scales should be calibrated yearly • Every time a scale is moved, it should be verified using a calibrated mass set • If scales are used often (daily), they should be verified monthly using a calibrated mass set to ensure proper working condition • Scales should always be level Source: Jason Moore, NCAT
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Gmb = [A/(B-C)] A = weight in grams of the specimen in air; B = weight in grams, surface dry; and C = weight in grams, in water. This is information the experienced lab tech will recognize. Considering bulk specific gravity calculations require weights be recorded to the nearest 0.1 gram, and the results be reported to the nearest 0.001 pounds per cubic foot, instrumentation (the balance and suspension apparatus, specifically) has to be on the mark. It has to be calibrated correctly. Jason Moore at the National Center for Asphalt Technology (NCAT) in Auburn, Alabama, shared: “Scales may not be the most glamourous piece of lab equipment, but are very important. Every sample tested in the lab has more than likely been on a scale at least once before testing.” A starting point for other equipment is the American Association of State Highway and Transportation Officials (AASHTO) guidelines. Ridolfi explained that AASHTO R 18 describes the minimum calibration requirements for certain pieces of equipment.
You can order AASHTO R 18-18 from Techstreet here https://bit.ly/2lC1UIm or from AASHTO directly here https://bit. ly/2Kumzcj. “Accredited and non-accredited labs should use R 18 as a starting point for calibration frequencies,” Ridolfi recommended. “The document also requires maintenance be included in the schedule of calibrations, but doesn’t provide guidance for maintenance frequency. The amount of use will dictate the maintenance cycle. Things with wear parts, like a Gilson™ shaker, need to be lubricated regularly. When I was in charge of a lab, we lubricated Gilson shakers weekly.” The point, of course, is to get consistent test results. Finch Troxler of Troxler Electronic Laboratories Inc., Research Triangle Park, North Carolina, pointed to the impor-
Gyratory compactors require calibration at least once or twice a year, according to Finch Troxler. Check out the article R18 Certifies Higher Calibration Costs at https://theasphaltpro. com/articles/r18-certifies-higher-calibrationcosts/ for information on calibration updates. Photo courtesy Troxler Labs. tance of monitoring older equipment for its consistency. “Really anything over 10 years old with regular use should be calibrated two times a year,” Troxler recommended. “There’s just one piece of lab equipment that should be calibrated semiannually. Gyratories should be calibrated one to two times a year and every time it is moved from one location to another.” Ridolfi explained: “Tests that are prone to variation need more frequent calibrations to maintain consistency across tests. Gsb and Gmm tests are prone to higher variation. The volume measures for these tests should be calibrated frequently, especially when weather changes. Although many labs calibrate them annually or semiannually, I rec-
Every sample, puck or core in the lab has been on a scale at some point during its testing process. The importance of the scale’s accuracy cannot be overstated. Photo courtesy NCAT. ommend calibrating them daily because of the high potential for variability in the test. “Sieves are required to be calibrated twice a year per AASHTO R18,” Ridolfi continued. “Fines sieves wear out quickly, so it’s a good idea to hold fines sieves up to a light to visually inspect them at the start of the day to see if the holes are plugged.
“You should let your experience guide your calibration and maintenance frequency. Each test relates to the previous tests and other tests on the same sample. Watching test results as a pool of results, and not just individual tests, will help you identify equipment that needs attention between calibration cycles. When something seems ‘not right’ relative to previous tests or other tests on the same sample, that is a good time to check your equipment,” Ridolfi concluded. The testing equipment outside the lab also needs calibration to ensure consistent and reliable results. Robyn Myers of Troxler Electronic Laboratories discussed the frequency of asphalt and soil density gauge calibration. Gauges should be calibrated annually to remain in compliance with the applicable Association of State Testing and Materials (ASTM) standards (D6938 and D2950 in particular). “Troxler also recommends this frequency as it ensures that the gauges are performing as expected,” Myers said. “When calibrated by a Troxler authorized service center, the gauges are also cleaned and lu-
bricated, wear parts replaced, software updates installed, and electronic components checked for any issues. Regular maintenance is always a good idea for equipment such as this that most users rely upon daily. Heavy use of the nuclear gauges would not cause them to require more frequent calibration; the calibration is mainly to account for the source decay, which is related to the passing of time. However, heavy use may cause the gauge to require cleaning, greasing and wear part replacement sooner.” Whether in the lab or in the field, quality control/quality assurance personnel can use standards from AASHTO and ASTM as the starting point for calibration basics, but no one has to settle with the minimum. As experts indicate herein, achieving consistent, reliable testing results may require more frequent calibration and maintenance depending on ambient conditions, equipment type and age, and other factors. Let these ideas guide you and don’t hesitate to call on lab experts for extra guidance. – BY SANDY LENDER
www.THeAsphaltpro.com // 17
Solve your problem
Solve Poor Milling Patterns
To achieve a proper milled surface prior to opening a roadway to traffic, or prior to performing maintenance or preservation treatment(s), the milling machine operator must remain cognizant of tooth wear or damage. If the pattern behind the milling machine is irregular, you could have a tooth—also called a tool or a bit, depending on what region you’re in—wearing incorrectly or even missing. Consultants agree that a veteran operator will be able to feel a change in the machine’s vibration when a tooth loses a tip or experiences some other problem, but new operators may have to rely on the power of observation to see a change in the pattern behind the mill to know when something’s going wrong. “It’s not common for a tool to fail,” Aaron Scarfia said. He’s the sales manager of the construction tools Americas division for Sandvik Rock Tools—Cutting Division, Bristol, Virginia. What’s more likely is a tool will be broken if the machine encounters a manhole cover or other obstruction. No matter how the damage happens, one tooth affects its entire row. “If you lose a tip, you’ll see a chain reaction,” Scarfia said. “The tooth behind the failed tooth will hit [the pavement] unevenly or roughly,” Scarfia explained. Not only will the operator feel this rough impact, he will be able to see it in the pattern behind the mill. The photo at left shows uneven ridges, which indicates the milling contractor was using a drum with teeth that didn’t have the same gauge height. Photo from Wikimedia Commons photographer famartin.
Here’s how to solve it before operation
Consultant John Ball, who is the proprietor of Top Quality Paving & Training, Manchester, New Hampshire, has preached the importance of the daily walk-around before a shift begins, and that comes into play here. If the milling machine operator performs a visual check of the equipment before the job begins, he’ll be able to see wear or a difference in gauge height between teeth on the cutting drum. Scarfia explained that replacing the worn tooth will save the rest of the row from damage in addition to giving the machine its best chance to mill properly. The drum at left is in good condition. Also check the water system. Both Scarfia and Ball spoke to the importance of the water spray for keeping teeth cooled and cleaned. “If the water doesn’t spray properly and you get one dry spot, you’ll get the same problem [of uneven tooth strikes],” Scarfia said.
Here’s how to solve it during operation
During operation, be sure to lift the cutter drum when approaching utility caps and other structures in the pavement. Keep teeth from striking obstructions to keep them from damage. The photo at left shows a state inspector performing a sand displacement test on a micro-mill pattern. The ridge height is uniform. – BY SANDY LENDER
Lower photos courtesy Sandvik Rock Tools. 18 // august 2018
Dependable Performance CONSISTENT MIX
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Producer profile
Sherwood Construction Controls Interests
Oklahoma contractor takes asphalt matters into its own hands on turnpike project As one of the larger general contractors in a three-state region covering Oklahoma, Kansas and Colorado, Sherwood Construction knows the value of controlling the variables of the job. Experience has shown them nothing can bring a project to a halt quicker, for example, than waiting on a materials supplier. When a project to widen I-44 just outside of Tulsa came up—a project that called for significant volumes of asphalt—they weighed their available options and, after some consideration, chose to purchase an asphalt plant of their own. In light of the fact the project includes a substantial penalty for delays, they’ve already proven that adding a 325-TPH EX-10248 plant from Asphalt Drum Mixers (ADM), Huntertown, Indiana, was the right move.
A
GENERATIONAL EXPERTISE
Established in 1934, Sherwood Construction’s roots are in dirt contracting. According to David Sherwood, the company’s current CEO and chairman of the board, the Sherwood lineage runs deep. “The company was founded by my grandfather and my great-uncle as a dirt contracting firm back in the ’30s,” he said. “They were initially involved in the effort to build the interstate system in Oklahoma and Kansas and it just grew from there. I’m sure they had no idea how far the business would go. Yet here we are today. We have more than 1,000 employees. My father, Howard, recently went from actively leading the company for decades to working on an advisory basis, and both of my sons, Stephen and Conner, are involved in the business. I’m proud that the company now spans four generations.” With that growth has come diversification. What was once a company focused solely on earthmoving, is now a multi-faceted organization consisting of 14 separate companies—including Wildcat Construction, which handles Kansas and Colorado projects—all under the Sherwood umbrella. The breadth of services offered includes a range of civil construction projects, including earthwork and site prep, concrete and asphalt paving, civil and structural concrete, underground utilities, rock excavation, piling and sheet piling, sub-grade stabilization, and construction of water/wastewater treatment facilities. “We pride ourselves in an ability to tackle most any project,” Sherwood said. “As part of that, we work hard to utilize the latest technology including GPS-based machine control, the latest survey solutions and the best construction equipment possible. There are,
22 // august 2018
While Sherwood Construction’s asphalt plant as it exists today is portable in design, after the I-44 project is wrapped up, the company plans to move it to a nearby location and convert it into a stationary operation. You can see the wheels are covered to safeguard them. All photos courtesy ADM.
David Sherwood is the chairman of the board and CEO of Sherwood Companies.
“By project’s end we will have used 449,000 tons of roadway aggregates, 239,000 cubic yards of concrete and 300,000 tons of asphalt.”—David Sherwood
We’ve been designing and manufacturing custom Pugmill plants in Tennessee for over 30 years.
STATIONARY
PORTABLE
The Sherwood Construction team placed and compacted 10 inches of asphalt in three lifts on the Turner Turnpike project. however, some things that we can’t control—someone else’s schedule, for example—and that can be a real frustration for contractors like ourselves.”
DIY APPROACH
To eliminate the need to wait on key subcontractors or suppliers, after analyzing the I-44 bid opportunities, Sherwood Construction decided they needed to take control of the asphalt facet of the operation. “That need was critical for us,” Sherwood said. “Though winning the bid on three of the four sections of Oklahoma’s I-44 turn-
SKID MOUNTED 931-388-0626 PugmillSystems.com www.THeAsphaltpro.com // 23
Producer profile
Prior to loadout, haul trucks stop for a spray of release agent.
Ensuring only the highest quality mix gets to the roadway: After the team had shut down for a couple hours, they positioned the wheel loader bucket under the silo to capture material from the gate for the RAP pile. pike expansion was great for the company, it also came with a real challenge. The contract carried a $20,000 per day per section bonus/ disincentive clause. So, at $60,000 a day, delay was simply not an option for us; we had to ensure that asphalt was available when we needed it and in the quantities we needed.” Matters were complicated by the fact that there were originally only three major asphalt producers in the area. One had recently bought out another, leaving only two companies—one of which was also bidding the project—in control of material in the region. “Things probably would have gone just fine, but we decided not to take that chance,” Sherwood said. “We could only guarantee success by producing the asphalt ourselves, so we started looking at what was available out there.”
MORE THAN THE MONEY
The search for an asphalt plant was thorough and comprehensive, with criteria that included everything from an ability to handle reclaimed asphalt pavement (RAP) to production levels to ease of maintenance.
24 // august 2018
From left: David Sherwood; Chris Wendt, plant operator/site foreman; and Stephen Sherwood, asphalt operations manager “Cost, of course, was a consideration, but, because we were new to the asphalt game, support was at the forefront of our concerns,” Sherwood said. “We wanted to know that, should we be uncertain about something or have an issue arise, the company that sold us the plant would be there to back it. We got that assurance from ADM. We purchased an EX-10248 plant, which offers production rates of 325 tons per hour, a perfect fit for this project and others as we move forward.” As the model number indicates, Sherwood Construction’s plant features a drum that is 102 inches in diameter and 48 feet long. It is a single-drum counterflow system that affords them the industry’s longest aggregate drying and mixing times, according to the manufacturer. According to plant operator/site foreman Chris Wendt, despite being fairly new to plant operations, he knows a good thing when he sees it. “I’ve only been in asphalt for about three years now, but I’ve worked with other companies who used different systems,” Wendt said. “I genuinely feel that, by far, this plant has it all. We put a lot of material through it right out of the gate and it rose to the challenge. We are doing about 18 to 20 percent RAP and have
“We are doing about 18 to 20 percent RAP and have had those percentages as high as 25 percent.”—Chris Wendt
An efficient system of conveyors brings mixed aggregate and fines from the feeds to the drum. had those percentages as high as 25 percent. I don’t know of any other plant in Oklahoma that runs higher than 15 percent… It’s a hard process to achieve, but this plant, despite being a counterflow system, burns very efficiently even at 25 percent.” For the I-44 project, Sherwood is laying S-3 RAP 64-22, S4 RAP 64-22 and S4 Virgin 64-22 mixes.
OUT ON THE PIKE
The project that motivated Sherwood to purchase the new plant is a $27.1 million portion of a larger $120.2 million contract to widen a section of I-44, also known as the Turner Turnpike, just outside of
www.THeAsphaltpro.com // 25
Producer profile “The contract carried a $20,000 per day per section bonus/disincentive clause.”—David Sherwood Tulsa. The contract calls for Sherwood to convert 10.2 miles of existing four-lane asphalt to a new six-lane concrete road with an additional 12foot shoulder for possible future dedicated truck use. “This is a tough project, even by our standards,” Sherwood said. “Between the three segments, we are moving more than three million cubic yards of soil and reconstructing 10 bridges along the route. The material demands are equally impressive: by project’s end we will have used 449,000 tons of roadway aggregates, 239,000 cubic yards of concrete and 300,000 tons of asphalt. We already own our own RexCon concrete batch plant, so we were covered in that regard. It was that asphalt volume that concerned us and led to the ADM plant purchase.” Though the project would appear to be overwhelmingly concrete in nature, those 300,000 tons of asphalt are nevertheless critical, first as the basis for the detour lane which is handling the re-routed traffic, then later serving as an underlayment for the new concrete. “Once we have the old pavement milled and removed, we cement-treat the existing subgrade followed by the placement of an aggregate base course,” Sherwood said. “Then, using a Cat AP1055D paver, we lay down a 10-inch layer of asphalt in three lifts— two 4-inch and a final 2-inch—all in advance of the 11-inch thick concrete. So a delay in the asphalt could easily have a ripple effect down the line, impacting production. We’ve essentially removed the risk of that happening.”
Plant Operator Chris Wendt shared that the team has run RAP percentages of up to 25 percent through the new plant.
MAKING A MOVE
While Sherwood’s asphalt plant as it exists today is portable in design, after the I-44 project is wrapped up, the company plans to move it to a nearby location and convert it into a stationary operation. “We own a rock quarry and operate it as a separate division called Greenhill Materials,” Sherwood said. “From a logistical standpoint, we always felt there should be an asphalt plant at that location and felt that, once we saw our workload, we could decide if it would be this plant or not. We now feel that it is. Once we make the move, if the need for a second plant arises, we will purchase another portable one to cover that work.” Because Sherwood’s EX-10248 plant is designed for ease of portability, making the move should be a painless operation. To that end, the company has already ordered a pair of 200-ton stationary silos and will assemble the relocated plant around those. “Once we have that operation in place, we will focus both on retail sales and bid work around town,” Sherwood said. “We currently do about 1.9 million tons of aggregate out of that quarry per year, so the asphalt operation will tie in well and should be an excellent new revenue stream for us. Given the performance we’ve already gotten out of it, the outstanding support from ADM and the potential it offers for future work, the new plant is a perfect fit for us.” – BY LARRY TROJAK
26 // august 2018
Plant Operator Chris Wendt shared the system burns very efficiently, even when running a RAP percentage of 25 percent.
Because Sherwood Construction’s EX-10248 plant is designed for ease of portability, making the move to the Greenhill Materials quarry location should be a painless operation.
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pavement maintenance
Florida Tackles Premature Failures of HFSTs F
Florida has tackled occasional premature failures of high friction surface treatments (HFSTs) with a new specification and guidebook for use in the Sunshine State. The State of Florida has used high friction surface treatments since 2006 to reduce wet weather crashes on tight curves and intersections and to maintain bridge decks, said Bryan Wilson and Anol Mukhopadhyay, Ph.D., associate research scientists, Texas A&M Transportation Institute, in their 2016 technical guidance, Alternative Aggregates and Materials for High Friction Surface Treatments. However, Florida DOT has reported issues related to premature failure of the treatment. Produced in cooperation with the Florida DOT and Federal Highway Administration, Alternative Aggregates and Materials included: • review of the literature and interviews with industry experts on the state of the practice of HFSTs; • documentation of all existing HFST projects in Florida with analysis of their performance based on distress, skid resistance, and crash reduction; • performance of field testing on six projects, evaluating their present performance and conducting forensic analyses as needed; • performance of lab tests on different aspects of HFST materials and construction practices to improve durability and reduce costs; and • development of a revised HFST specification for Florida and an HFST guidelines brochure.
HFSTS SUCCESSFUL SINCE 2006
Despite their success since 2006, various sections of HFST have experienced severe cracking and potholing of the pavement, delamination from the existing surface, and raveling of the aggregate from the resin binder, the authors say. Another issue with HFST is that the high material costs limit the number of sections that can be treated annually. “Consequently, there is a need to research the best materials and practices to eliminate premature HFST failures and reduce overall HFST costs, while maintaining or improving treatment life and friction performance,” Wilson and Mukhopadhyay said. Project documentation and field testing indicated the bid unit cost of HFST in Florida was between $26 and $40 per square yard, and the total unit cost (including traffic control, repairs, striping, etc.) was between $36 and $113 per square yard. They discovered: • Crash reduction from HFSTs was most effective on tight curves, where the average reduction in crash rate was 32 and 75 percent for total and wet weather crashes, respectively. Crash rates did not notably change on wide curves/tangent but increased on average for intersections/approach.
28 // august 2018
Aggregate loss over uneven texture. Photos courtesy Florida DOT. • HFSTs are a cost-effective treatment for tight curves with a history of crashes. The average benefit-cost (BC) ratio on tight curves with a history of crashes was between 18 and 26 (depending on calculation method), with some sections greater than 50 and as high as 118. • HFSTs are not cost effective, from a crash reduction perspective, on wide curves/tangents with no history of crashes. The cost effectiveness for bridge deck preservation was not part of this research. • The cost effectiveness of HFST at intersections/approaches is still inconclusive. Half the observed sections had good BC ratios, while the other half had increased crashes. • Different distress types were observed in the field (potholing, aggregate loss, surface cracking, substrate tearing, splotchy texture). Through forensic evaluation, several of the failure mechanisms were identified as discussed in the background section. Highlighted research findings from the laboratory testing include: • Aggregate loss is a function of binder thickness, where aggregate loss greatly increased for binder thicknesses less than 50 mils. • A double application of HFST can mitigate issues with aggregate loss. • Single applications on concrete appear to wear away faster than single applications on HMA; however, this phenomenon has not been proven or disproven yet in the field environment. • The concrete tested had a coefficient of thermal expansion (COTE) value of 5 x 10-6/°F and asphalt between 7 and 9 x 106/°F. In comparison, the COTE of HFST is drastically higher, between 14 and 30 x 10-6/°F. This would imply that stress builds up between HFST and the substrate during thermal cycling.
EVO
pavement maintenance • The standard gel time test was not drastically responsive to changes in proportioning until a 25 percent change, but it is much more sensitive to temperature. • A thin HMA overlay mix was successfully designed using PG7622 binder and a coarse-size calcined bauxite. The design had good rutting resistance. The friction properties, while better than other HMA designs, are inferior to HFST. • Two calcined bauxite aggregates with similar aluminum-oxide (Al2O3) contents both performed well in HFST friction testing. Another aggregate of unknown composition had good friction properties, but was not on par with calcined bauxite. (Of particular concern was the high micro-deval mass loss.)
RECOMMENDATIONS
Based on these and other findings, Wilson and Mukhopadhyay recommended the following: Candidate Projects. The researchers recommend that agencies strongly consider applying HFST on tight crash-prone curves. Agencies should carefully consider if HFST would be effective at reducing crashes at intersection approaches and within intersections (i.e., identify if a significant source of accidents is skid related). When applied on wide curves and tangent sections (i.e., for maintenance of bridge decks), agencies should not expect to see significant economic benefits from crash reduction; however, benefits from pavement preservation may warrant the cost. As concerns the existing surface type, the researchers do not recommend placing HFST on open graded friction course (OGFC) pavements. While some projects have successful performance over OGFC, the material often causes more problems like excessive draindown, requirement of double-lift HFST, substrate cracking, and stripping. These surfaces should be milled out and inlaid with dense-graded mix prior to applying HFST. The department may consider a minimum substrate strength requirement, but stricter requirements on the existing surface type and distress condition should resolve issues with substrate failure. The researchers don’t recommend excessively stringent requirements on surface condition, as it could unnecessarily drive up the costs of HFST application with marginal benefits to long-term performance. Materials. The two calcined bauxite sources evaluated in this research are acceptable for HFST. The researchers recommend lowering the minimum required Al2O3 content for calcined bauxite to 86 percent. The minimum required content could likely be lowered further with negligible effect to performance; however, the data are not yet available to support this decision. The unknown aggregate type tested in this research may be suited for bridge-deck preservation. The current specification for polymer resin binders is adequate. In the future, the department may consider a specification with greater flexibility to mitigate problems with thermal incompatibility. This change would need to be balanced with the binder strength and hardness.
New guidance may be downloaded at http://www.fdot.gov/materials/ pavement/performance/ndt/documents/hfstguidelines.pdf
30 // august 2018
An alternative approach to HFST could be incorporating calcined bauxite into HMA design. While a successful design can be created, it is likely an infeasible option considering the economics of producing and constructing such small quantities. It may only be feasible if paving a winding rural road. Even then, the friction performance of this design is inferior to HFST. Construction. The researchers recommend a contractor requirement to place an HFST test section before full-scale application. This gives the contractor a chance to identify and fix problems, and of equal importance, the Florida DOT inspector will become familiar with the process and potential issues. Surface preparation of all projects should include a high-pressure air wash after sweeping to remove remaining dust and debris. Concrete surfaces should require shot blasting to a texture level of concrete surface profile (CSP) 5. Many problems associated with poor mixing, uneven resin binder thickness, and insufficient aggregate coverage could be solved by using automated application equipment. The researchers recommend Florida DOT adopt this requirement into its specification. This is expected to increase the cost of HFST early on, especially since very few companies have this capability. With time, as more vendors enter to compete, the costs are expected to decrease. Neither the gel time test nor the Fourier transform infrared spectroscopy (FTIR) test are recommended as quality control methods. The tests are not sensitive enough to misproportioning except at extremes; therefore, the tests are not substitutes for proper maintenance and calibration of the application equipment. Still, the simple gel time test does have a place to ensure against major problems. The required mil thickness in the current HFST specification is adequate and the researchers recommend that contractors and inspectors check the actual mil thickness from time to time with a thin film thickness gauge. Currently the contractor is required to sweep after the initial cure and do follow-up sweeping after two weeks. The researchers recommend another follow-up sweep between 24 to 48 hours on high-volume roadways.
HFST SPEC, GUIDELINES
After discussions with FDOT and industry leaders, many of these recommendations have been incorporated into a revised FDOT specification. In addition, a user-ready booklet, titled High Friction Surface Treatment Guidelines: Project Selection, Materials, and Construction, was developed to mirror the FDOT specification and provide additional insight into many requirements and recommendations. The document can be obtained by contacting Charles Holzschuher at the FDOT State Materials Office (charles.holzschuher@dot.state. fl.us), or downloaded at no charge at http://www.fdot.gov/materials/ pavement/performance/ndt/documents/hfstguidelines.pdf. – BY FP2
Learn more online. See how Oklahoma’s HFSTs have succeeded in the pavement maintenance department on www.TheAsphaltPro.com.
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WIDER to allow conveyors to run slower yet convey the proper mix to silos. Larger and wider conveyors have a stronger section modulus than bridge beam designs.
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DRAG CONVEYOR CHAIN so entry point of asphalt into the tailshaft ALWAYS stays the same. This prevents premature wear of chain.
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plant operators when its time to tighten the chain.
REX PLANTETARY GEARBOXES for all conveyors. ALL OF OUR SILOS COME STANDARD WITH 3/8”
CONE LINERS AND ONE ROW OF RECESSED WALL LINERS. Recessed wall liners don’t allow the problematic wear spot to occur that silos that other silos have seen in recent years.
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Project management
Cold ambient temperatures during the late fall and early spring influenced equipment choices.
Wooten Makes Quality King on Crystal Coast Airport In April 2017, construction of a new taxiway was completed at a 400-acre, three-runway air field on the crystal coast in Beaufort, North Carolina. Originally named the Beaufort-Morehead City Airport, the facility was renamed Michael J. Smith Field to honor one of the Space Shuttle Challenger pilots who was born and raised in Beaufort. We overcame several challenges during the eight months we worked on this project, from tackling temperature dynamics for the asphalt laydown to taming the effects of tides and hurricanes with a unique drainage system.
I
PREPARE FOR TAKEOFF
Beaufort-Morehead City Airport Authority originally planned for this project to take place in three phases over eight months to maximize open times on the primary runway. The airport allowed us to combine the first two phases and we completed those during the fall of
32 // august 2018
2016. We planned phase three for a 21-day period during the spring, which involved reconstruction work on a major taxiway intersection. Taxiways and runways were shortened at times during construction, but remained open. At times we provided a flagger to help airplanes cross the work zone as well. All these actions helped pilots find their way around the work zone because there is no ground traffic control at the airport.
SECURE THE FOUNDATION
In Beaufort we were excavating below sea level for construction, so groundwater was something that needed to be accounted for in stabilizing the underlying pavement base. To ensure a sound sub-base, we used a soil-cement stabilization method. The process involved mixing Portland cement with existing soil and water under the taxiway to create a low-strength concrete located three feet below the pavement subgrade. The taxiway then re-
ceived 8 inches of P-209 crushed aggregate base course and 4 inches of P-401 bituminous surface course placed in 2-inch lifts.
PAVE THE RUNWAY Temperature restrictions were a factor for us when it came time for the asphalt paving portion of the project. It was a long distance between the hot-mix asphalt plant and our project site, and we were doing most of the paving during the late fall and early spring when the weather could still be quite cold. To ensure a quality product, we leveraged a Roadtec material transfer vehicle. This helped us keep the asphalt at optimal temperatures while we transferred it from the dump truck to the paver. We used a traditional Caterpillar paver with an Asphalt Reheat Systems (ARS) joint heater attached over the longitudinal joint to pave abutting paving lanes. This system gave us more insurance on the joint densities as test cores are required at joints in P-401 specifications. It also helped to produce the smooth paving surface that S. T. Wooten runway projects are known for. While the paving equipment helped us drive quality, a GPS grade control system also served as a tool for precision fine grading during the stone-base portion of the project. The technology allowed us to pave with the accuracy and reliability required under the airfield’s specifications, while also ensuring we met our quality control requirements and time deadlines.
A Roadtec MTV10000 re-blended material to help hold heat and an Asphalt Reheat Systems (ARS) joint heater attached over the longitudinal joint helped achieve smooth abutting paving lanes. influenced equipment choices.
REPAIRS AND FINISHING TOUCHES
For the Michael J. Smith Field project, we also conducted rehabilitation work on a section of the existing parallel taxiway between runway 14-32 and runway 8. We installed a geo-textile fabric waterproofing interlayer, a double bituminous chip seal and 4 inches of P-401 bituminous surface course placed in two, 2-inch lifts. Crack sealing was also part of the repairs.
www.THeAsphaltpro.com // 33
Project management
The crew placed 8 inches of P-209 crushed aggregate base course on the taxiway. A GPS grade control system also served as a tool for precision fine grading during the stone-base portion of the project. Upon completion of the paving, we marked the new parallel taxiway and remarked the runway 14 and runway 21 thresholds back to their preconstruction location to get things ready for use. We installed new edge lights along the taxiway pavement between Taxiway A and Runway 8, in addition to a taxiway guidance sign. Vault modifications were used as part of the electrical work, which included installation of a new 7.5kV regulator.
STEM THE TIDE
Groundwater was constant in the surrounding area and two major storms gave us additional drainage challenges for us to get the job
34 // august 2018
done. Tropical Storm Hermine dropped about 8 inches of rain on us in September 2016. Then, an additional 12 to 13 inches of rain fell from Hurricane Matthew during the first week of October. We only had to excavate 4 feet deep; we opted to use a sock-drain system to drain water away from the construction limits. We installed more than 7,000 linear feet of sock drain for dewatering. Sock drain is HDPE pipe perforated with holes and fitted into a fabric sleeve to filter dirt out of the water. A vacuum pump attached to the system helped pull water out of the ground and isolate the work area. We used a trencher to install the sock-drain system around the perimeter of the site. Because it was positioned outside the edge of
heavy loads without pushing water to the surface. A swivel-dumping feature also gave us the capability to dump over the side and rear to minimize turning and backing.
MAKE THE GRADE
The S. T. Wooten crew placed 4 inches of P-401 bituminous surface course in 2-inch lifts. the pavement, the sock drain could be left in the ground after construction was finished for better ease-of-use. Onsite, we used Hydrema articulated dump trucks for low ground-pressure—making them an ideal fit for the wet conditions we faced. With flotation tires, these trucks allowed us to move
Throughout this process, adhering to stringent paving regulations from the Federal Aviation Administration (FAA) was a top priority. These specifications are some of the most difficult to deal with when it comes to mix designs and paving tolerances that are tighter than typical department of transportation paving. By taking steps to establish a game plan, putting the right processes and equipment in play, we overcame some of the unique challenges that come with construction work near the coast in Eastern North Carolina. The careful project planning and management helped us meet all specifications and finished on time with no penalties. Our crew’s hard work and ability to execute with a commitment to quality allowed us to be successful on this project. It’s safe to say our team passed the test, and we’ll take this knowledge with us to the next project as we strive to deliver the best results for our customers. – BY ROBERT LEN HUNT JR.
Robert Len Hunt Jr., P.E., is a division manager for S.T. Wooten.
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www.THeAsphaltpro.com // 35
meet the national exec
Meet the National Exec: NSSGA’s Michael W. Johnson My chief goal is to make sure that NSSGA is executing on our strategic plan and meeting our members’ expectations of their primary federal trade association. I believe it’s extremely important for a trade association to have a member-driven strategic plan that charts an aggressive course to achieve the goals and objectives that its members have told you are important to their businesses. NSSGA has successfully advanced pro-aggregates messages in Washington, D.C., taken the aggregates agenda to Congress and continued to fight for our smaller producer members.
Michael W. Johnson The National Stone, Sand and Gravel Association advocates on behalf of the aggregate industry, with its members representing more than 90 percent of crushed stone and 70 percent of sand and gravel produced each year in the U.S. Michael W. Johnson has been the president and CEO of NSSGA for nearly five years, since joining the association in August 2013. In this month’s Meet the National Exec department, AsphaltPro spent some time getting to know Johnson and learning more about NSSGA and the benefits it provides to its members in the aggregate industry.
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What were you doing prior to becoming president? Immediately prior to being the president and CEO of NSSGA, I was the executive vice president and chief advocacy officer for the National Beer Wholesalers Association. Before that I was the vice president for government affairs at the Wine and Spirits Wholesalers Association, and before that a government affairs staffer for the National Association of Homebuilders. What are your chief goals for your time as president? Advocacy is job no. 1 at NSSGA.
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Do you have a degree related to the industry? Do I have a degree related to the stone sand and gravel industry? No. Do I have a degree related to advocacy? Yes. I hold bachelor degrees in political science and journalism from the University of Kentucky. Go Wildcats! I am also a graduate of the Institute for Organization Management.
INDUSTRY INFO: How did you get into the industry? I’ve always had a focus on advocacy from my early days on Capitol Hill. I worked for a United States Senator as a member of his staff and campaign, and also with some other groups and causes. After that, I decided that I wanted a career in advocacy, and particularly in trade associations. I never set out to join the aggregates industry, but was glad to bring my advocacy experience to NSSGA. A search committee sought to find a new President and CEO for NSSGA, and they and member companies wanted someone who could squarely focus on advocacy as job no. 1 and help to build a trade association that would do the same. What does membership in NSSGA mean to you personally? Someone who has made the decision to join NSSGA has decided that it’s not just good enough to be a company en-
gaged in this business. Our member companies recognize the importance and the value of being engaged in the public policy debates that directly affect their ability to do this business and do it well. Those that have vested their hard-to-earn dollars in a trade association understand the importance of a united voice and the strength of numbers. How has membership in NSSGA benefitted your members? We have been able to move the needle on public policy issues that affect the business of producing aggregates and the ability to do that in a way that is profitable and emphasizes the importance of safety. We have also been able to make progress on creating an environment where our member companies can grow. When you’re producing the basic building blocks of anything significant, like our homes, hospitals, communities and infrastructure, and that business is going well, it means that things are being built. When our members can come together to affect the public policy debate in a way that encourages building and encourages growth, then we’re not only helping our industry, but we’re helping our economy and our country as a whole. Could you give an example (or two) of a way your organization assists its members with workforce development? The assistance we provide our members comes in a number of different ways. We host a jobs board where our members can post available jobs at their companies, which allows them to not just have the ability to advertise those jobs in their local communities, but nationwide. We also have created the AGG1 Academy so that we can help professionals in our industry develop and refine their skills through some world-class educational opportunities. NSSGA has been at the forefront of moving public policy on increased spending on vocational education programs and rational immigration reform.
LEFT: Johnson and his wife, Jill, have been married for 16 years. They have two sons: Wesley, nearly 14, and Wyatt, 8. CENTER: Johnson is an avid golfer and is currently the president of the executive committee of First Tee of Greater Washington, D.C., where kids and teens learn life lessons and leadership skills as they learn to play golf. RIGHT: Here, Johnson blends vocation and avocation. What is your favorite method for recruiting new professionals to the industry in general? And why? First and foremost, our members are having to do more with less as production numbers come back from the great recession. It’s a real challenge in an industry like ours, because the work that we do is hard and sometimes a little bit dirty. It’s certainly not the easiest work that people can do. So to find folks who have the needed skillset and abilities, and are willing to come into this industry, is tough to start. Increasingly, we’re seeing that finding people who have that and can also pass a drug test is difficult with the legalization of marijuana in many places. At the same time, we’re not a new industry. We’re not a Silicon Valley start-up or, on the surface, have the things that the millennial workforce is attracted to. NSSGA is committed to assisting our members in recruiting new professionals by engaging student chapters at a number of universities where there are mining and engineering programs. We are helping those young people understand the opportunities our industry has to offer after they graduate. Also, our Young Leaders program is a great way in which talented employees, 40-yearsold and younger, can seek to come together, network and grow their careers. We know that there are thousands of jobs across the
country and they’re great jobs. The average worker in an aggregates operation takes home $71,000 a year. These are good paying jobs with good benefits. What are your top two or three ideas for helping your members, and the industry in general, stay strong in light of these changes? We need to get back to a real and strategic national infrastructure investment plan. To do that, the administration and Congress must reprioritize infrastructure projects. It is not just about filling potholes and fixing bridges. It goes beyond getting us up to a good state with our current infrastructure. We need to think about the infrastructure we’re going to need in the future to compete in an increasingly competitive world economy. We’re struggling to find the means to meet current infrastructure needs, while other countries like China are building for today and the future. China is investing heavily in their domestic infrastructure and building world-class infrastructure in other countries right now. This will be a benefit to the Chinese economy and improves trade and exports from the other countries. We must do a better job of thinking about infrastructure investment in a way that has us future-focused and ready to meet those challenges. The aggregates industry has to
be able to have the folks in place, the workforce that’s trained, equipped and ready to meet that demand. What other threats to the aggregates industry do you plan to guard against? Most importantly, we are addressing a continued reluctance on the part of the federal government to make meaningful investment in infrastructure. This lack of investment hampers the industry because we move our product on the roads, rails and waterways of this country’s economic circulatory system. Not having a strong federal infrastructure investment also makes it difficult for our industry to recover the volume lost after the 2008 recession. Getting that certain and robust funding back in place helps our national economy as well as our member companies, their employees and communities. We also have to continue to guard against over-regulation from federal agencies. Rules and regulations based on unsound science hinder our ability to meet that demand once infrastructure investment funds are more available. What sorts of events, training opportunities, etc. does NSSGA offer to members throughout the year? NSSGA is very proud of the continued growth of the AGG1 Academy & Expo. We will continue to invest heavily and
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meet the national exec
Johnson also coaches local youth basketball. He and his family reside in Alexandria, Virginia. make sure that that our trade show and educational opportunities are world-class. In between those events, we continue to offer distance-learning programs with live and on-demand options. Not to mention Young Leaders, where top executives educate our younger generation with their personal and professional insights. How does NSSGA recruit new members to its organization? And what are the chief benefits of membership? NSSGA recruits new members to the organization in a few different ways, but the most effective way is member-to-member recruitment. Member-to-member testimonials about the value of being a member of NSSGA are, without a doubt, the best way to bring someone into our membership. Chief benefits of membership are access to member-only content that equips companies to be better at the business of producing aggregates, from the educational programs we offer to regulatory compliance assistance. Membership also helps companies be their own best advocate with the federal government and ensure that policies, from infrastructure investment to regulatory affairs, foster the growth of aggregates companies.
ABOUT MICHAEL W. JOHNSON What do you see as the most important part of your job as NSSGA president? The most important part of my job starts with staying connected to the membership, listening to what they’re telling us and recognizing their needs and expectations of their federal trade association. Then it’s on me, as president and CEO, to set a direction that will en-
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able the association to meet those desires and deliver on that value proposition. For me, I’ve always been driven to do more and to achieve at a higher level. I have never accepted the status quo as the best we can do. I love having someone articulate a challenge to me, and then helping them think through how to go out and meet that challenge. I think strategically and I’ve always had a natural draw towards leadership. I’m rarely the guy that sits in the back of the room and doesn’t come forward with an idea about how to get something done or make things better. What do you find most enjoyable about being the president of NSSGA? Watching how effective we can be when our members and our staff come together in pursuit of the goals and objectives in our strategic plan. You really get to see progress made on important public policy issues, and when we’re successful – when the aggregate industry is doing well – everyone is doing well. America is doing its best when we are building and growing. The two work hand in hand. Could you share with our readers an example of a challenge you’ve overcome in the past and how you overcame it? My leadership style is to look at difficult challenges as opportunities for creative solutions. This particular challenge was solved with goats and a grant. As the grounds committee chairman for a local swim and tennis club, I faced the challenge of the property becoming overgrown with invasive and destructive vines and limited resources to address the problem. Not only was the area an eyesore, but the health of hundreds of large trees was
being compromised. If those trees fell, and Washington, D.C., sees a lot of strong storms, the club’s power supply and facilities were at risk of significant damage. I learned about a company called EcoGoats that provides herds of hungry goats that have a particular taste for the kind of invasive vines that we had in abundance. I also discovered a county grant program that provided funding for environmentally-friendly community enhancement. In the end, the goats seemed to really enjoy gorging themselves on the invasive ivy and the grant award made the goats an affordable solution for the club. On top of that, the attention that the goats got from the surrounding community and local media led to visits from school and civic groups that actually resulted in some new members for the club. Wife and children’s names: My wife of almost 16 years is Jill. We were married in 2002. We have two sons: Wesley, who’s soon to be 14, and Wyatt, who’s 8. Our family currently resides in Alexandria, Virginia. Most influential book you’ve read/you would recommend to others: For me, during the transition into becoming a CEO, it would have to be a book called, “What Got You Here Won’t Get You There: How Successful People Become Even More Successful,” by Marshall Goldsmith. It talked about how the skills that led you to be an overachiever as an individual player aren’t enough, on their own, to move up and lead teams. It really helped me to learn a different way of doing things to succeed at higher levels of management. Do you have any hobbies or a favorite pastime? I am an avid golfer, not necessarily an accomplished one, but definitely avid. I have been able to use that passion for golf to give back to the local community. I am currently the president of the executive committee of First Tee of Greater Washington, D.C., where kids and teens learn life lessons and leadership skills as they learn to play golf. I’ve served on the board for 13 years now. I was lucky enough to take something I really enjoy outside of the office and turn it into a way to “pay it forward.” – BY ASPHALTPRO STAFF
Photo courtesy EvoQuip
BY SANDY LENDER
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For this year’s aggregate-centric issue, original equipment manufacturers (OEMs) shared ideas relative to placing mobile crushing equipment near the face in the quarry. Both quarry and asphalt plant managers must be aware of loading equipment cycle times. Sub-optimal cycle times can cost money in terms of fuel, maintenance and equipment life span. The optimization of cycle times contributed by mobile crushing and screening equipment can benefit both aggregate and asphalt production facilities. No one is suggesting plant or quarry owners phase out jobs. The question of how to leverage the talent in your team isn’t the topic of this article. This article focuses on using technology in your existing quarry or pit to your best cost-advantage. The integration of portable crushing and screening equipment to existing facil-
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ities can increase productivity and profitability by reducing cycle times for loading equipment. But mobile crushing equipment needs expert pre-planning for proper implementation, which will save time and money in the long run. “Some of our dealers will permit mobile units ahead of time at different locations, giving them greater flexibility for moving units between branches, depending on demand,” said Stephen Whyte, track product manager for KPI-JCI and Astec Mobile Screens. “The frequency of relocating the crusher or screen depends on the layout of the site, how the units are set up and other mobile plants that are being used. In some instances, track plants may be moved multiple times throughout the day.” (See Sidebar, “Top 4 Reasons to Move the Mobile Crusher.”)
Excess movement of the wheel loader in relation to the primary crusher indicates time to move the crusher, said Joe Schappert, technical trainer for Kleemann, a division of Wirtgen America. “The loader will travel from the primary jaw crusher at the face…When the distance increases between the face and the primary, the wheel loader may be exceeding the optimum distance from face to crusher, conveyor or truck. This is when you move the primary crusher closer to the face.”
MADE TO MOVE
Innovations in the marketplace have made the moves easier for operators than in the past. “Advancements on units like our FT4250 give operators the ability to track the unit while continuing to crush material into pay product,” Whyte said. “In instanc-
es where multiple units are configured together, the location of the crushing depends on the ability to feed correctly. For example, if your loader’s travel distance increases to the point where you are unable to feed the jaw and cone crushers effectively, the mobile spread should be moved.” And that’s the point where efficiency truly comes in for the operation. OEMs agreed that one of the most important considerations when developing a crushing operation plan is auxiliary machine cycle times. Loader and haul truck OEMs, among other equipment vendors, have determined the ideal operating cycle times to get the best fuel efficiency and equipment wear costs for their pieces of production equipment. If the plant manager determines the cycle time is increasing beyond the OEM’s best suggested time, the producer may need to make a move. “As stationary aggregate production facilities age in productions, the distance from the face increases,” Schappert explained. “Companies are now exploring other options to reduce travel cycle times. One solution is to place a track-mounted primary plant at the face and convey material via overland conveyors. With today’s technology in track-mounted crushers, producers maintain production requirements and reduce overhead costs, which in turn reduces cost per ton of material produced.” Paul Smith, director of international sales & marketing for Astec Aggregate and Mining, Chattanooga, spoke in terms of moving volume of material. “When you load big boulders in the truck, there’s a lot of voids between them. If you can crush the big boulders closer to the face, you move smaller rock with fewer voids away from the face. Volume reduction equals fewer hauls and better fuel use. We’re applying lean principles of business to construction right there at the blast face.” Whyte spoke of combining stationary and mobile systems to gain the benefits mentioned above. “There are a number of quarries that are using a track spread to complement a stationary system. While mobile units have many options, they are designed to work in conjunction with other units in closed or open circuit configurations, providing operators maximum flexibility for different types of applications.” The “many options” in the marketplace were on Smith’s mind while we spoke. “You need an experienced crew for the stationary plant, but much of the industry’s trib-
Processing the larger boulders close to the face will allow “fuller” loads with fewer voids, thus a more efficient operation. Photo courtesy Volvo Construction Equipment. al knowledge has been engineered into the mobile units. The conveyors have been set at an angle for no spillage. Conveyor speeds are pre-designed and pre-set. Different machines are designed for different materials. You don’t want to misapply the machine to your application.”
SILENCE!
When it comes to noise mitigation, Schappert spoke specifically about the Kleemann equipment’s engineering. “The development of the new EVO and PRO series machines use different technology. Kleemann crushers use a fluid coupling and electrical power to drive the functions of the plants. This combination affords the Kleemann crusher some of the lowest fuel consumption in their class and maintains a decibel rating near the same level as most production loaders and excavators.” Smith pointed to the enclosed engines on mobile units in general. “Keep an eye on the engines,” he said. “In some areas, you need a permit on the engine. Enclosed engines are quieter.” For Astec Industries equipment, he spoke of reduced metallic surfaces where aggregate strikes. “We’ve built in more non-metallic surfaces like rubber wires, rubber springs, rubber hoppers, to mitigate noise.” Whyte also mentioned the use of rubber lining. “Many producers use rubber liners on their equipment to minimize noise. With our hybrid units have the ability to quickly switch from diesel to line-power, which further reduces noise, and gives producers the
opportunity to work indoors and in other environmentally sensitive areas.” Putting mobile processing equipment close to the face offers producers reduced costs in fuel and equipment wear, but the decision to invest in mobile equipment needs to be the result of an analysis of the producer’s current costs and how mobile equipment would enhance return on investment. “The aggregate industry, like any other industry, faces increased levels of competition and producers are constantly under pressure to reduce costs,” Whyte shared. “Track units provide many cost reductions for producers in the long term. The units often require less heavy auxiliary equipment and the costs associated with them, including labor and fuel. Many track plants are set up quickly and can be easily moved for maintenance or in preparation for a blast. They can then be moved back effortlessly; no dismantling is required.”
Top 4 Reasons to Move Your Mobile Crusher
• It is easy to move around the site; can be done quickly to adjust for production needs • Distance from face to plant has increased over time • Cycle time for loaders & haul trucks has lost efficiency; wear costs & fuel consumption are going up • Overall production will be enhanced by moving primary closer to face Source: multiple OEMs
www.THeAsphaltpro.com // 41
Improved Efficiency INCREASED PRODUCTION V-Flights Shower Material Along the Edge of the Notch as Well as the Tip
V-flights Allow for a More Even Veil of Material
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To meet market demand, we change mix design often. The frequent changes push our plants to the limit. ASTEC suggested we add the V-Pac stack temperature control system. We started using the V-Pac system and, without a doubt, it has improved efficiency and increased our production capability.
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Production Manager, CR Jackson Inc. Operating the V-Pac Stack Temperature Control System since 2011
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As commodity prices enjoy another bull run, the mining industry reacts to change. Professional services firm Deloitte Global identified 10 key trends facing the industry in its recent Tracking the Trends report. Here Deloitte’s leader of mining, Phil Hopwood, explains more. The last decade has been a rollercoaster of historic highs and historic lows in the mining sector. While the industry currently enjoys strong commodity prices, the next decade is likely to see more vigorous change. Here are ways mining companies need to react to succeed in the new environment.
1.BRING DIGITAL TO LIFE
Once measured by how well a company extracted resources, the industry’s value proposition may be shifting to how well a company acts on information to optimize production, reduce costs, increase efficiency, and improve safety. In short, data—and the ability to organize, manage and process the data—is becoming a competitive differentiator. To succeed in this effort, miners need a clear vision of how the future digital mine might transform core mining processes, the flow of information, and supporting back office processes. Once the information is captured, the use of data-driven analytics will help optimize their systems, from pit to customer.
2. OVERCOME INNOVATION BARRIERS
To some extent, innovation barriers exist because the design of mines and processing plants hasn’t changed in decades. Although commodity prices have begun recovering, mining executives are still feeling the sting of the downturn. As a result, they are cautious, meaning that innovation efforts are constrained by the need to demonstrate short term returns. The catch is that, unless you are trying new things, you are not learning, and if you are not learning then you will fall behind. Mining companies can only achieve true innovation maturity if they go beyond the basics of operational improvements to embrace innovation in a broader sense.
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3. LOOK AT THE FUTURE OF WORK
As the digital mine becomes a reality, the nature of work is set to change dramatically. Repetitive human activities will be replaced by automation and autonomous equipment that reduces labor intensity and improves safety. AI will help knowledge workers, and integrated communications will support mobile workers, while digital work scheduling and robust cybersecurity will keep operations efficient and protected. These changes will support a more diverse and inclusive workforce.
4. MIND THE IMAGE
Despite the significant contribution of the mining sector to the world’s economy, the industry’s reputation remains tarnished in many countries due to perceptions that mining contributes to environmental damage, causes a negative impact to the community or engages in dubious practices abroad. In a world influenced by round-the-clock news cycles and opinions aired in the court of social media, this type of backlash is only bound to increase. This will force mining companies to take proactive steps to address, and change, their reputations. This is more than a public relations exercise. To rebuild trust with employees, investors, communities, governments and the public, mining companies must back up their messages with action.
5. TRANSFORM STAKEHOLDER RELATIONSHIPS
To expand local employment opportunities, increase tax revenues and meet demands for improved infrastructure and greater environmental protection, many governments of resource-rich countries continue to put pressure on the mining industry. As a result, mining companies still face considerable obstacles to investment, ranging from high royalty taxes, permitting challenges and uncertain tax rules, to demands for local processing. An underlying cause of this friction can be traced to miners’ own actions. Some of the social ini-
Graphic courtesy Volvo CE.
tiatives mining companies have undertaken in the past have failed to deliver their intended results. Increasingly, the industry is realizing that its approach to community and government relations must change. As mines move towards more digital and automated operations, the effect on local employment – the basis of mines’ relations with communities – will change. To prevent a backlash, companies will need to leverage the digital infrastructure on behalf of communities, to improve communications, create new education models (e-learning) or deliver other digitally-enabled services. This will require companies to be more creative in understanding the real needs of communities.
6. MANAGE WATER
As ore grades decline, more water is needed to extract the same quantity, pushing up water requirements in the industry. Critically, this growing demand is not offset by available supply, with one-in-four people predicted to live in countries affected by chronic freshwater shortages by 2050. As concerns about water availability grow, communities and environment groups are turning their spotlight on water intensive industries. In
light of this, mining companies must enhance their approach to water management.
7. CHANGE SHAREHOLDER EXPECTATIONS
As shareholder expectations grow, mining companies have begun focusing on reestablishing their credibility in the investor community and with analysts. Rather than pursuing the mega-mergers of the past or building new mines, many are exercising higher degrees of financial discipline.
8. CONSIDER RESERVES
Intense cost cutting may have improved the short-term fortunes of many miners, but it comes at a cost, with reserves of many commodities sharply down. Gold, copper, silver, nickel and zinc, to name a few, have all experienced reserve depletion in recent years. Despite the pick-up in commodity prices, many miners are struggling to free up the exploration and development budgets needed to exploit new resources.
9. REALIGN MINING BOARDS
To transition to the mine of the future, companies must embrace new talent. To do this, miners need to make a substantial cultural shift.
Some companies have already taken steps in this direction by engaging in cross-functional collaboration, seeking out best practices from other industries, strengthening their executive teams and setting targets to achieve greater diversity and inclusion.
10. DECIDE ON FUTURE COMMODITIES
To decide which commodities to invest in, and which to get out of, miners need to keep their fingers on the pulse of changing consumer demands and economics, demographics, and environmental change. More recently, they have also had to follow the rapidly developing emergence of new technologies. Battery demand is set to soar in anticipation of the exponential growth of electric vehicles and energy storage systems. Demand for lithium is also expected to soar, as is graphite, nickel and copper. The impact of these trends on the mining industry could be transformative. – FROM VOLVO CE
Phil Hopwood is the Leader of Mining for Deloitte Global. Read the full Deloitte report at https://www2.deloitte.com/global/ en/pages/energy-and-resources/articles/ tracking-the-trends.html
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BY JESSICA BATCHELOR
Adequate space and ease of accessibility are essential in every aggregate storage building, but neither makes a difference if water damage occurs. By their very design, tension fabric structures are engineered to maximize natural ventilation, minimize condensation and withstand even the harshest weather conditions.
LET IT FLOW
Consistently dry buildings all have one thing in common—adequate airflow. Fabric buildings have a built-in advantage in this regard, since they do not require any internal support posts. This creates an open, clear span with plenty of clearance, thereby maximizing ventilation in a natural, cost-effective manner. For an extra boost of air circulation, some fabric structure companies can outfit a building with ridge vents, fans, end walls or side panels. This allows business owners to create air flow precisely when and where they want it. Building and window placement can also aid the process of ventilation. Putting buildings in the direction of prevailing winds can greatly help to minimize moisture or condensation. Similarly, installing windows on opposite sides of the building will create substantially more airflow than putting windows on just one side.
COVER IT UP
The tent-like rooftop of a fabric structure is far more rugged than it may appear at first glance. High-quality fabric covers are made of heavy-duty polyethylene that features a ripstop scrim to prevent tearing. Couple
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ABOVE TOP: The Rogers Group keeps this aggregate pile under a fabric structure with excellent ventilation and access for loaders. LEFT: Fabric buildings, no matter their size or shape, keep air clean, fresh and, most importantly, dry. The building manufacturers offer a variety of roof designs, sizes and styles to accommodate any size or quantity of aggregate storage. RIGHT: Windows can be placed across from other windows to enhance airflow in the fabric structure. All photos courtesy ClearSpan. this with a corrosion-resistant steel frame for protection against extreme weather conditions, including heavy rain, snow, sleet and wind. Geoff Ching of ClearSpan Fabric Structures has worked on numerous fabric building projects within the storage industry and noted that, “Fabric covers are 100 percent moisture-resistant, so valuables are going to be protected no matter what.” Fabric covers can also meet balanced and unbalanced snow load regulations, ensuring that ceiling leaks are not a source of concern. The natural ability of fabric buildings to withstand corrosive environments makes them especially valuable in marine and salt storage applications as well. In addition to strength, fabric covers have another secret weapon when it comes to water-damage control—sunlight. White fabric covers allow plenty of natural light to pass through, which cuts down on moisture, mold and humidity year-round. Cer-
tain fabric covers even have climate-sensitive properties, keeping the interior cooler in the summer and warmer in the winter. With the combination of regular sunlight and natural ventilation, fabric buildings can consistently maintain air quality and air flow.
FOUNDATIONS
Conventional buildings are often constructed on concrete foundations. Although concrete is perfectly sturdy, it is also porous and can hold onto moisture that comes up from the ground. Fabric buildings have a lot of versatility when it comes to foundation options, most notably, Ching mentioned, the helical anchoring system. Helical anchors are shaped like spirals and drill directly into the ground, creating a secure hold that is classified as temporary but durable enough to remain permanent. Without any concrete, there
is a reduced risk of humidity and moisture getting to the building from the ground up. Other popular options on which to construct fabric buildings include shipping containers, pony walls or piers. Like helical anchors, these foundations won’t absorb moisture and to boot, they add extra height to a structure, which promotes natural ventilation. It’s important to realize that in addition to a variety of foundation options, fabric buildings are available in a wide array of styles and sizes, none of which compromise on the ability to keep storage materials dry. Many traditional buildings have flat rooftops that can collect leaves and moss, trapping moisture along with them. Fabric buildings have rounded or peaked roof designs that encourage moisture and moisture-trapping debris to slide off.
ON THE SIDE
An open-sided design is a popular style for municipalities, construction needs, bulk storage and even vehicle garages. The open side provides ample airflow and direct access to aggregate storage, so workers and vehicles can easily enter and exit the structure without having to move or rearrange storage materials. Having open sides practically guarantees an environment free of condensation. If materials need to be split up for any reason, an open-sided structure can easily be divided into separate commodity bays. If extra protection from inclement weather is desired, it’s possible to outfit an open-sided fabric structure with side panels to partially or completely enclose the side. Although an open side can be ideal for many storage needs, it’s far from the only option for effective moisture protection. Fabric building manufacturers offer a variety of roof designs, sizes and styles to accommodate any size or quantity of aggregate storage. Many fabric structures can be constructed up to 300 feet wide and any desired length, so business owners can fit as much storage material as needed inside, while protecting it from the elements and water damage. Sources in this Article http://www.cardinalselfstorage.com/ blog/6-tips-to-avoid-moisture-andhumidity-issues-in-storage http://www.atlas-leasing.com/ keep-items-dry-inside-a-shippingcontainer-diy-guide
Superior ventilation, ample sunlight and frames made with high structural integrity all provide dependability for aggregate storage companies, no matter their application or geographic location. Whether it’s a few expensive but large vehicles, or a massive amount of salt or sand, aggregate storage materials are an investment. All investments deserve dependable structures that will provide year-round moisture protection. Fabric buildings, no matter their size
or shape, keep air clean, fresh and, most importantly, dry. For business owners across all industries, fabric buildings provide the most functional, effective solution to keeping aggregate storage materials safe from water damage. Jessica Batchelor is a content writer for ClearSpan, which specializes in fabric structures for the asphalt industry. For more information, visit www.clearspan.com or call (866) 643-1010.
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product gallery
More Than Heavy Equipment Influences Your Paving Profit T
This month’s product gallery headline felt a little odd as I typed it because the product gallery typically focuses on robust pieces of iron. I noticed, though, the news releases I’ve received this spring and early summer have been for the “accessories” to paving. You know what I mean: putty knives and temperature guns. Of course these things are important to have in the mechanic’s shop or on the back of the work truck so production doesn’t have to stop for a run-of-themill fix out there in the field. But I found myself looking for the sexy equipment with Tier 4 Final engines and powerful cutting drums. You know what I mean: 12-foot extendible pavers and halflane mills. After my Clara Peller moment asking “where’s the beef?”, I did some soul-searching for why I felt the need to highlight big machines instead of release agents and pliers. Ladies and Gentlemen, each and every one of these products has its place in a product gallery related to paving and pavement maintenance/preservation. Getting fuel to the jobsite matters just as much as getting the heavy equipment delivered in a safe, legal and timely manner. Both of those facets of project management get a mention with product innovations this month. Does measuring the brightness of the pavement’s striping sound easy? There’s more to it than meets the eye, of course, and a company in Texas has designed a system to make it a little easier, more efficient and safer to accomplish. While I dug up information on a few of the heavy equipment pieces worth following post-World of Asphalt, I also picked out the non-iron items that can contribute to your profit margin. Consider the use of sealers to make pavements last longer for a client. That’s valuable information to learn about whether it involves a 3,000-gallon tanker with special heating unit or not. Let’s look at one example from Asphalt Systems Inc. (ASI), Salt Lake City, Utah, specifically.
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The Iowa parking lot in 2016 looks as “young” as when it was first treated in 1978.
GSB MAINTAINS FOR 39 YEARS AND COUNTING
Way back in 1978, the Central Church of Christ in Cedar Rapids, Iowa, applied a GSB sealcoating product from ASI to its newly paved parking lot. The organization has followed the initial application with treatments of the same product every five years, as prescribed. Today, with no maintenance other than GSB sealcoating, the parking lot looks as new as it did 39 years ago. Field trials and official studies support ASI’s asphalt life extension claims. During the 1990s, an ASI GSB sealer was evaluated through two independent field trials in Oregon—Portland International Airport (PDX) and Mulino State Airport (4S9). In both cases, the sealer was applied as a part of a preventive maintenance program, and its longterm performance was monitored. The performance data of PDX Taxiway C showed that the GSB product was able to maintain the taxiway pavement at an excellent level for the trial period of eight years. Performance data of the Mulino runway trial showed that the GSB sealer kept the runway at excellent condition for 10 years by interrupting its aging process, including halting the progress of raveling and weathering.
Other airport runway examples of ongoing and effective pavement preservation include Blanding Municipal Airport (BDG) in Utah, which has had four treatments of GSB-88® over the past 26 years. The runway pavement at Central Colorado Regional Airport (AEJ) in Buena Vista is 22 years old and has had three treatments of GSB-88 applied to it. Data on this airfield from the Colorado Department of Transportation Division of Aeronautics website shows that the pavement has remained in good condition with a PCI score of 87. Navy Facilities Command (NAVFAC) pavement specialists have performed a long-term evaluation of 1.2 million square yards of GSB applications on widely varying military airfield pavements and climates. In addition, the MicroPAVER data for 883 treated municipal airfield pavements across multiple climatic zones was critically evaluated. In both cases, the results of the evaluation were positive and demonstrated life extension for treated pavements. Currently GSB-88 is compliant with Department of Defense UFGS 32 01 13.63 and Federal Aviation Administration AC 150/5370-10G, P-608, and can be applied to all airfield pavements, including critical runways, according to the
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product gallery manufacturer. Engineered as a pavement preservation material ,GSB-88 can also be effective at rebinding raveling pavements, which on critical airfields can mitigate asphalt based Foreign Object Debris (FOD). “One of the keys to success with our GSB products is an initial application when pavement is in new, or near new condition, and then subsequent applications at the recommended intervals,” said Brad Grose, vice president of sales and marketing for ASI. “If these recommendations are followed, GSB products can essentially freeze—or suspend—a pavement’s condition over time, keeping it at that quality indefinitely.” Gilsonite, an integral component of ASI’s GSB products, is a unique, naturally occurring resinous asphalt ore found in Utah that does not have to undergo an oil refining process. GSB products comprise a mixture of Gilsonite, specially selected plasticizers and oils that penetrate and reintroduce essential binders into the pavement matrix. They are designed to mitigate the impacts of surface oxidation and moisture damage on asphalt pavements, halting deterioration and sealing the surface to help repel water. The product also helps prevent surface raveling. For more information, contact sales at (801) 972-2757.
ARROW
Forklift fork design and construction has developed immensely over the last 100 years. However, the most common fork damage occurs at the heel of the fork. “While we continue to develop and improve the design of our forks to increase durability, the fork heel remains the most susceptible to breakage,” said Terry Melvin, CEO of Arrow Material Handling Products, Lenexa, Kansas. “We believe the Fork Shield is the answer. By administering fork shields across an entire fleet, companies should expect a significant increase in the lifespan of their forks.” Fork shields are designed to protect the most vulnerable part of the forklift fork from nicks, gouging, accidental damage and resulting stress cracks. By using these mountable protection devices, forklift forks last longer and protect against early replacement.
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Arrow Material Handling Products has been a supplier of replacement forks for over 40 years and now offers the fork shields to extend forklift fork life. During research and development, one fleet manager said, “We choose to invest in high-quality forks for their durability. Other than occasional cracks or gouges, fork shields consistently deliver a positive return. They significantly decrease damage typically caused by operator error, which has led to a considerable reduction in our fork replacement costs.” Fork shields are available in three different sizes depending on the width and thickness of the fork in use. Fork shields are sold only in pairs and are to be mounted directly onto the forks. For more information, contact sales at (913) 227-0523.
BRINNO
Even small construction businesses can showcase their work, protect the business against claims or report work to the head office with a jobsite camera. The team at Brinno, Stuart, Florida, has released the Brinno BCC200 model in a wire-free, weatherproof camera bundle. The camera is mounted with an industrial-grade aeronautical aluminum alloy clamp and requires no wires or cables to install. Powered by an HDR-sensor, the camera produces shots with high contrast even in challenging lighting conditions, according to the manufacturer. There is a special night mode to deliver time-lapse video during backlights and/or dark conditions. For more information, visit www.brinno.com.
CHANNELLOCK
Channellock Inc., Meadville, Pennsylvania, launched June 11 its new line of insulat-
The new line of insulated pliers from Channellock includes four tools. ed pliers designed for electricians and other professionals who need high quality OSHA-compliant pliers for safety on the job. The new insulated plier line includes four tools: • 8-inch Long Nose Plier with a long, streamlined design for precision handling, and XLTTM Xtreme Leverage Technology to enable cutting with considerably less force than traditional high-leverage pliers. The pipe grip design will accommodate many shapes and the crosshatch teeth provide a tighter grip. • 7- and 8-inch Diagonal Cutters featuring strong lap joint construction and a durable diagonal cutting-edge design. The 8-inch Diagonal Cutter also features XLT technology to improve cutting performance and reduce hand fatigue. • 8-inch Combination Plier featuring XLT technology, crosshatch teeth for a tighter grip and a pipe grip design to accommodate many shapes. The insulation is impact resistant and flame retardant, and the entire product line complies with IEC 60900-2012, ASTM F1505-16 and NFPA 70E standards. They are tested to 10,000 VAC and rated for 1,000 VAC when working on live parts. For more information, visit www.channellock.com.
CHEMTEK
Chemtek Inc., Morrisville, North Carolina, has released its new silica dust suppressant NeSilex™ to reduce worker exposure to respirable crystalline silica dust. NeSilex is recommended for any dust-producing construction activity including milling, sweeping, crushing, mining, sawing, jackhammering, earthmoving and grading. NeSilex contains specially formulated surfactants, wetting and agglomerat-
ing agents causing dust particulates to saturate and attract to each other. This process allows for dust suppression, reducing silica dust inhalation by workers and the surrounding public. Initial testing has shown up to 100 percent reduction in respirable silica dust in certain construction activities. Using NeSilex will ensure that contractors meet OSHA Standard 29 CFR 1926.1153 Table 1 guidelines for exemption of employee exposure assessment for certain construction activities, according to the manufacturer. For more information, contact David Elam at (919) 631-4331 or david.elam@chemtek.us.
FR8 REVOLUTION
FR8 Revolution, creators of the FR8Star. com marketplace for open deck carriers and shippers, announced June 13 its new Price Lock feature that allows shippers to instantly obtain a guaranteed fair market rate and immediately book freight for legal and permitted flatbed and open deck
The FR8Star site allows shippers to book oversize loads such as large equipment or machinery. freight. The entire process from estimate, to payment and confirmation can be completed in less than five minutes. “It has never been easier to book oversize/ overweight loads such as large equipment or machinery,” said Carl-Christoph Reckers, co-founder and COO of FR8Star. “Shippers can access FR8Star’s online technology from anywhere 24/7 and book shipping.
What used to be a long and tedious process to determine the correct trailer needed, an optimal shipping route and the appropriate permits is now as easy and quick as booking an airline ticket online.” The FR8Star.com marketplace enables shippers to move legal and oversize/overweight loads with reliable pricing estimates, optimal shipping routes and real-time freight tracking. Specialized open deck carriers can easily develop quotes and bid on high-value loads using a free freight rate calculator that factors all third-party expenses including state permit and escort costs. FR8Star eliminates unnecessary factoring fees to carriers by providing fuel advances at pickup and instant pay at drop-off. For more information, visit www.fr8star.com.
GPI
GPRO® Engineers at Great Plains Industries Inc. (GPI), Wichita, Kansas, have unveiled the QM Series Remote Dispensers. The series includes two models: the
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product gallery QM240-RD for measurements in gallons, and the QM150-RD for liters. QM Series meters require no calibration and measure diesel fuel or unleaded gasoline to within +/- ½ percent across a flow range of 2 to 40 GPM (8 to 150 L/min). In developing the QM Series, GPRO engineers sought to address drive shaft leaks. With that goal in mind, they replaced the drive shaft with a magnetic drive. This MAG Drive is designed to eliminate shaft seal leaks and is nearly frictionless, resulting in exceptional accuracy at low flows. The QM Remote Dispenser can withstand harsh elements with a rugged steel cabinet construction featuring a powder coated finish, a cast aluminum switch-lever and nozzle cover. Specifications include: • Positive displacement oval gear technology • No leak magnetic drive (MAG Drive) • Safety Solenoid Valve • 1-inch NPT Y-Strainer • Operating temperature: 20° to 125° F • Maximum working pressure: 50 PSIG / 3.4 Bar For more information, visit gpi.net.
Green Way
In an effort to help the environment, Green Way Products LLC (GWP), Mahwah, New Jersey, has developed an alternative to using diesel fuel for cleaning equipment and tools. Bitu-Ox 400™ was designed by a chemist who had worked in the oil fields for over 40
Bitu-Ox 400™ from Green Way Products is designed as a biodegradable cleaning agent. 52 // august 2018
years, working with a variety of chemicals to help remove oil sludge in the fields. When he came to GWP, he developed a product for use at asphalt plants, paving companies, roofing companies and more. Bitu-Ox is designed to immediately break down any tar-covered surface and turn it into a liquid form for easy clean-up. This formula is certified biodegradable and waterway safe* by SCS Global Services in California. Bitu-Ox was formulated to work in extreme heat and cold, with a flash point of 400 degrees F. Products are sold individually in 32-ounce bottles, 5-gallon pails, and 55-gallon drums at www.bituox.com and at Allied Building Products stores. For more information, contact GWP (888) 442-6191. *SCS Certified Biodegradable & Waterway Safe: non-reactive, non-carcinogenic, derived from renewable resources
HITEK
Hitek Equipment Inc., Kenosha, Wisconsin, offers the new Malavasi Pavijet MG7 that turns your skid steer or loader into a mini paver. The internationally patented Pavijet is the only paver you can fill with gravel, sand, stones, hot asphalt, cold asphalt or concrete, according to the manufacturer. It is designed to handle worksites such as cycle tracks, sidewalks, parking lots, driveways, paths, utility trenches, road patching and more. The MG7 travels forward, placing material as any finisher would, and can bypass obstacles thanks to the retractable screed. The worker operates the screed, auger and hopper wings via hydraulic controls. For more information, contact Tom at (262) 842-1700.
The MG7 forward driving side screed Pavijet is the new mini paver from Hitek Equipment Inc. Its counterpart, the MG6, is the reverse driving centerline Pavijet.
LEICA
Hexagon AB, Stockholm, introduced June 13 the Leica BLK3D, which is a compact, 3D, handheld imager designed to enable immediate and precise 3D measurements from any image it captures. By combining measurement sensors, software and on-device edge data processing capabilities, the BLK3D enables in-picture measurements with professional-grade accuracy. Every image captured by the BLK3D is a complete and precise 3D record. Its edge capabilities eliminate the need for network connections and/or cloud services, ensuring professionals can make faster decisions within their daily workflow. With the expanded functionality of the desktop software, users can create new projects and CAD-ready 3D models from their measurable images. BLK3D connects seamlessly to a laptop or desktop computer via Wi-Fi or USB cable. Data is automatically synced and measurable images can be accessed, processed and organized from the desktop application. For more information, visit hexagon.com.
MAULDIN
Mauldin Paving Products has introduced a new paver to its line of commercial pavers. The 1350-C has a standard working width of 4 to 8 feet. It’s designed for a multitude of applications ranging from road shoulder, to utility trenches, to small paths. The screed on the 1350-C weighs in at 2,000 pounds. The screed comes standard with thermostatically controlled electric heat, and sonic sensors to control the flow of material. The 6-ton hopper has independently
The 1350-C is a new commercial paver from Mauldin Paving Products.
controlled wings that can be completely opened up to allow for 180 degrees of material loading. For more information, visit www.4amauldin.com.
NEAL
Neal Manufacturing, a division of Blastcrete Equipment LLC, Anniston, Alabama, offers its Asphalt Road Preservation Package for optimal efficiency and high-quality results on both detail and high-volume sealcoating applications. The package includes the drivable DA 350 dual applicator for quick prep work and sealcoating around curbs and gutters, and the high-volume road maintenance vehicle. “From municipalities to contractors who have a wide customer base, equipment that can efficiently handle a variety of sealcoating jobs is a must,” Neal Manufacturing President Tripp Farrell said. “Our package ensures that whether they’re sealcoating a local street or a 5-mile stretch of highway, they have dependable equipment to efficiently achieve high-quality results.” The DA 350 is a three-wheeled, self-propelled sealcoating machine that features a built-in, high-powered blower and AutoTrim, an automatic cutting-in attachment. The high-volume road maintenance vehicle features Neal Manufacturing’s Generation IV pump that delivers infinitely variable outputs from 0 to 150 gpm, even with larger aggregate mixes. With the high-volume road maintenance vehicle, operators can cover up to 14 feet in one pass at a rate of 150 gpm. Incab controls allow for on-the-go spray bar height adjustment, ensuring optimal distance between the nozzles and road surface is achieved as the truck shifts weight and moves from full to empty. Individual nozzles can also be controlled from the truck cab, giving contractors the flexibility to adjust the spray area as needed, whether alternating tips or only using one side of the dual spray bar. The Generation IV pumps on the high-volume road maintenance vehicle allows operators to transfer 3,000 gallons of material from storage tanks in as few as 20 minutes. Neal Manufacturing designed
The DA 350 from Neal Manufacturing is a drivable machine that makes up half of the manufacturer’s new Asphalt Road Preservation Package.
Neal Manufacturing introduces an Asphalt Road Preservation Package, which includes its high-volume road maintenance vehicle (pictured). the pumps with heavy-duty features, including robotically welded pump housings and industrial-grade hydraulic cylinders for extreme durability and longevity. For more information, contact eric@ nealequipment.com.
PSS
PSS, Cleveland, has launched its newest product, the RoadQuake® RAPTOR™ rumble strip handling machine. It is designed to transport, deploy, realign and retrieve RoadQuake 2F Temporary Portable Rumble Strips (TPRS) in work zones, to improve operational efficiency and increase worker safety. The machine mounts to the front of a vehicle for ease of operation and has a capacity of 12 RoadQuake TPRS. The product provides positive portable protection when deploying and retrieving RoadQuake TPRS,
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product gallery
The RoadQuake® RAPTOR™ transports and places up to 12 RoadQuake TPRS. and is designed for short-duration, shortterm and mobile operations. Check it out under the Here’s How it Works tab at www. TheAsphaltPro.com. For more information, contact Dave McKee at (216) 403-0898 or David.McKee@PSSInnovations.com.
RMS
Striping Service and Supply (SSS), Grand Prairie, Texas, has branches across Texas, Louisiana and Florida, and offers a full line of pavement marking supplies and equipment for contractors. Now the company is the first U.S. striping contractor certified by the Texas Department of Transportation (TxDOT) to operate the RetroTek-MU road striping Retroreflectometer. The Texas A&M Transportation Institute (TTI) certification program provides a quantitative basis for evaluating the ability of a contractor to operate the retroreflectometer equipment to accurately measure the retroreflectivity (RL) of long-line pavement markings. The program was developed and administered by TTI through an implementation project sponsored by TxDOT and the Federal Highway Administration (FHWA). TTI certification consists of taking numerous pavement markings measurements of various colors, patterns and retroreflectivity levels, and providing the measurement results to TTI officials for assessment. Jay Green, a veteran retroreflectometer operator with SSS, attended the TTI certification course April 2018 and is the first survey operator and user to be certified using the RetroTek-MU. TTI certification allows
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SSS to be eligible for TxDOT pavement markings retroreflectivity contracts. According to Green: “We are delighted with the performance of the RetroTek-MU as it measures the striping on both sides of the lane in one pass without the need to switch the sensor from one side of the vehicle to the other. At the end of surveying, all the data can be quickly prepared and sent to district TxDOT officials, without the need for hours of post-processing.” The RetroTek-MU is center-mounted on the front of a vehicle. This eliminates the need to drive close to the striping at the edge of the lane. The sensor is mounted higher than side-mounted systems and surveys at 15 mts distance (conforming to 30-meter geometry). The RetroTek-MU surveys across the full width of a lane in one pass. It includes a comprehensive suite of mapping and video software for post survey analysis. Joe Turley, CEO of Reflective Measurement Systems Ltd. (RMS), the developer of the RetroTek-MU, stated: “With the advent of Advanced Driver Assist Systems (ADAS), this technology will assist road agencies and infrastructure stakeholders to assess and manage the pavement markings of their entire road network safely and quickly.” For more information on SSS, contact Vice President Herbert E. Bickley at hbickley@ stripe-a-zone.com. For more information on RMS Ltd., contact Joe Turley at joeturley@reflective-systems.com.
The RetroTek-MU is unlike traditional sidemounted retroreflectometers in that it is center-mounted on the front of a vehicle.
ROADTEC
Roadtec, Chattanooga, debuted its Auto Cut technology at World of Asphalt in March. Auto Cut comes standard on the company’s RX-600 cold planer and allows milling machine operators to raise the mill, walk over obstacles, walk back into the cut, and resume milling at the same depth without reprogramming or delay, according to the manufacturer. Auto Cut is paired with ACE™, Roadtec’s grade and slope sensor system, and uses averaging skis and end gate sensors. Each leg of the machine is controlled by a different sensor, gathering four data points. Data is continuously updated and displayed, keeping the crew on the same page at all times. For more information, contact Eric Baker at ebaker@roadtec.com or (800) 272-7100.
THUNDER CREEK
Thunder Creek Equipment, Pella, Iowa, launched its multi-tank trailers (MTT) at World of Asphalt in Houston in March. They’re touted as the first fuel and service trailers designed to legally transport bulk diesel on the road without requiring drivers to maintain a CDL or HAZMAT endorsement (Title 49 (CFR49)—local regulations may apply). “This came from a very specific construction industry need to haul bulk fluids from jobsite to jobsite without CDL and HAZMAT licensing,” General Manager Luke Van Wyk said. “With the shortage of skilled labor in the construction market today, and the difficulty in finding and retaining certified drivers, these new trailers allow any worker with a valid driver’s license to haul the trailers within federal regulations.” This is made possible by isolating diesel in four, six or eight separate 115-gallon, DOT-compliant, non-bulk tanks. Tanks are joined by a manifold to a common pump, creating complete isolation during transport and controlled dispensing of fuel at the jobsite. Today’s high-horsepower construction equipment requires excellent diesel and DEF purity to ensure efficient and continued operation. Thunder Creek MTT Trailers help contractors provide these bulk fluid solutions without the cost of a larger,
MOBILE MONITORING NEW FEATURES Recon system is a mobile monitoring system created by Heatec for monitoring equipment at an asphalt plant. The system provides real time status of asphalt storage tanks, and hot oil heaters directly to a smart phone. The latest version mirrors your heater’s BurnerLogiX™ management system on your mobile device. The messaging feature keeps you updated with over 80 different messages, allowing you to easily monitor the status of your heater. With added clarity, monitoring your plant has never been easier. *Fireye® is a trademark of UTC Fire and Security Company
800.235.5200 www.heatec.com
H E AT E C , I N C .
Get alert messages directly to your phone, tablet or PC. Record trending data of temperatures, levels, and alarms. Recon now gives the option to display metric units or conventional U.S. units. Easily add the system to a new or existing plant. *some plants may require additional equipment.
an Astec Industries Company
5200 WILSON RD • CHATTANOOGA, TN 37410 USA 800.235.5200 • FAX 423.821.7673 • heatec.com
product gallery
The MTT Trailer from Thunder Creek provides a bulk fluid solution without the cost of a larger, full-sized fuel truck. full-sized fuel truck or third-party delivery service. MTT Trailers come standard with a 25-gallon-per-minute (GPM) pump, 10-micron fuel filter and a 35-foot auto-retracting hose reel. Options include an ISO-compliant 4-micron fuel filter (ISO 4406) and 50foot hose reel. The trailers also provide industry-leading DEF handling and storage solutions that ensure optimal DEF quality to protect SCR systems. Each trailer can be outfitted with a 100-gallon DEF tank that features Thunder Creek’s closed DEF delivery system, including the patent-pending, 2-in-1 DEF pumping system. This system connects the DEF tank with the bulk DEF container through a closed coupler. On the jobsite the coupler is replaced with a DEF nozzle for dispensing into the machine. Each DEF tank leaves the factory cleansed and sealed according to the ISO specification (ISO 22241). The trailers are available in 460-, 690and 920-gallon capacities. Each MTT Trailer is available with an optional rear utility box. These utility boxes can be customized to each individual customer with the inclusion of toolboxes, a workbench with vise and Thunder Creek’s 3-in-1 welder/generator/air compressor. Additional options/customizations include Thunder Creek’s WorkSight light tower, Field Max tires, 35-pound grease kit, aluminum wheels, solar battery charger, an electric/
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hydraulic jack and a stainless steel trim/ fender upgrade. For more information, contact sales at (866) 535-7667.
WESTERN GLOBAL
Western Global, Clawson, Michigan, introduced the EnviroCube tank for refueling equipment and fleet vehicles. The EnviroCube’s lockable cabinet keeps fuel secure and controls access to hoses, ports and fittings, protecting them from the elements and theft. “The EnviroCube is a cost-effective yard tank for companies looking to reduce costs and enjoy the peace of mind that comes with a secure on-site fuel supply,” General Manager Barry Truan said. “With the EnviroCube, customers can reduce expenses by
taking advantage of lower per-gallon rates by purchasing fuel in bulk and scheduling deliveries when prices are low.” Western Global engineered the boxshaped fuel storage system for easy and inexpensive movement. The EnviroCube stays within height, length and width standards for over-the-road transport. Once it’s on site, contractors can move the tank via crane-lifting hooks or four-way forklift pockets. The system’s full-height cabinet secures all pumping equipment, which enables Western Global to install components prior to shipping, reducing on-site setup time. Additionally, in-cabinet shelving provides space for customers to store extra tools and supplies. The EnviroCube’s weatherproof, double-walled design provides 110 percent fluid containment, eliminating the need to own and clean a secondary pan or basin while ensuring environmental compliance. Further, a top access hatch simplifies inspections, cleaning and routine maintenance. To increase fueling flexibility and efficiency, Western Global equips the tank with multiple ports to simultaneously fuel as many as three pieces of equipment. Letterbox-style openings on the tank’s side allow it to act as an auxiliary fuel source for equipment such as generators, pumps and light towers while the cabinet remains locked. Western Global offers the tank in four models with capacities ranging from 4,966 gallons to 12,329 gallons. For more information, contact info@ western-global.us.com.
Western Global’s EnviroCube provides on-site refueling for construction equipment and fleet vehicles.
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AUTOMATED SOLVENT EXTRACTION: DOT Evaluation of the infraTest Asphalt Analyzer, the newly approved ASTM test method for performing automated extractions on Recycled Asphalt Materials (RAP) acknowledges, “Advantages of the Asphalt Analyzer include reduced technician time needed to complete the extraction and provides significant exposure risk reduction to harmful solvents during the test.” The Asphalt Analyzer process saved overall about 1.5 hours of staff time per extraction. During extraction the technician was free to perform other tasks. The unit dried the sample and at that point the sample was ready for gradation, absorption, and specific gravity testing. The Asphalt Analyzer procedure allowed for quick and accurate turnaround of test results. Risk Assessment showed that the Asphalt Analyzer scored in the low risk range since the Asphalt Analyzer reduced the time and volume of solvent solution needed while running the test, providing further exposure risk reduction. It is concluded that the machine can provide superior risk controls, leading to improved health, safety and efficiency conditions.” To learn more visit: www.infratestusa.com
ASTM D8159-2018D SAFEST SOLVENT EXTRACTION PATENTED CLOSED VACUUM SYSTEM AUTOMATIC CRUMB RUBBER EXTRACTION MOST ACCURATE EXTRACTION METHOD RESULTS IN 50-90 MIN USED BY 10 DOT’S AROUND THE USA
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www.THeAsphaltpro.com // 57
new tech
Cat, Volvo Invest in Remote Control Capabilities I
It’s no surprise to asphalt and aggregate industry professionals that some jobs can be quite dangerous. Imagine being able to remove your workers from danger by allowing them to do those jobs from a safe distance. Original equipment manufacturers (OEMs) are making the opportunity to remotely control and monitor equipment a reality. According to a recent report by McKinsey & Company, one of a handful of the core areas North American OEMs should focus on to take advantage of technology in the construction industry is remote control of equipment. OEMs across the nation and around the world are making investments to ensure that quarry and mining operations can see the full benefits of this new technology.
REMOTETASK, TO START
Although the report identifies the continued potential of this technological trend, Caterpillar, Peoria, Illinois, has been implementing remote machinery control capabilities since 2015 with the launch of RemoteTask. The remote control system, a partnership between TORC Robotics, Blackburg, Virginia, and Caterpillar, enables operators to control Cat D Series skid steer, multi terrain and compact track loaders from outside the cab, at distances up to 1,000 feet. “When I use the RemoteTask controller, the machine response is instantaneous,” Cat Instructor Bob Shoop said. “The feel and response mirrors the operator controls of the machine itself. Remote controls I’ve tested previously often had a delayed response.” With the turn of a key, RemoteTaskequipped machines can switch between manual and remote modes. RemoteTask can be particularly useful for skid steers to clean up spillage under conveyors at aggregates processing plants, a job that could normally present a safety hazard for workers. However, two of the most significant use cases for remote machinery control within the Cat family are dozing and loading applications.
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CAT COMMAND EXPANDS CONTROL
Cat Command, first introduced at Conexpo in 2017, allows operators to control dozers and loaders using either a portable console or a complete operator station. Cat recommends the portable console for short-duration activities like road cuts, while the remote operator station offers the same familiar setup and seated position operators are familiar with from the cabs of their Cat dozers. “The station itself is modeled on the actual cab of the machine, with all ergonomic controls, alarms and features operating as they do in the dozer,” Caterpillar’s media department said. The system can be used for line-of-sight operation at distances up to one-quarter of a mile or for tele remote operation, with the addition of video and sound from the dozer on site. According to Cat, Command for dozing has proven itself through thousands of hours of operation in mines around the world. “Remote operation allows dozers to be used in any situation that presents potential safety and health hazards,” Cat officials said. Although there are numerous applications for Cat Command, including high wall and edge work, drainage operations and work on steep slopes, it can also be used for blasting, allowing dozers to continue production without waiting for the air to clear. Command is also available for line-ofsight remote control of Cat 988K wheel loaders, enabling safe operation in potentially hazardous environments via a portable control console at distances up to one-quarter of a mile. The shoulder harness console features all primary functions within the cab, as well as advanced options such as Autodig. This option expands remote control operation to tasks such as stockpile feeding or gaining access to materials too dangerous to extract with an operator aboard. “Any technology that can reduce the dependency on traditional machine operator resources and provide a safer, cleaner environment for employees is a big interest to
Caterpillar and customers, and will continue far into the future,” said Caterpillar Senior Marketing Professional Jason Hurdis. “Command technologies start to build a bridge from having an operator in and for every machine to full autonomy requiring no operators. This technology requires less infrastructure investments and a quicker learning curve. As fully autonomous solutions continue to develop and be developed, barriers to entry such as infrastructure costs, general fear or suspicions will be reduced.”
VOLVO PUSHES THE EXTREMES
Caterpillar isn’t the only OEM investing in remote control operation. In May of this year, Volvo Construction Equipment, Gothenburg, Sweden, announced results from a research project in which a Volvo wheel loader working one-quarter of a mile underground in a mine was remotely controlled from the surface. Known as the Pilot of Industrial Mobile Communication in Mining (PIMM), the Swedish research project incorporated 5G mobile communication technology and the latest technology in automation to push the limits of remote control of equipment in challenging industrial conditions. “Volvo CE’s mission statement for the project was to prove that the technology we’re developing internally is applicable in a customer environment,” said Erik Uhlin, advanced engineering program leader. “We wanted to highlight that industrial applications in mobile networks aren’t just something out of science fiction – they’re real. Testing was carried out while production was taking place and that was demanding – but it meant that we were working with real problems, in a real environment.” Although Volvo’s remote-controlled wheel loader is not yet commercially available, the success of the recent research project provides yet more proof that OEMs are invested in remote equipment control to make the aggregate industry, among others, safer and more efficient. – BY SARAH REDOHL
Retrofit Controls
A Heart Transplant for Your Plant
The control system: it’s the heart of your plant, reaching every aspect of your operation. ASTEC Retrofit Controls expand and improve your capabilities with an all new control system customized to fit your needs. It’s like a heart
‘‘
Pictured from left to right Roy Bryant, Plant Foreman Ricky Pendergrass, General Superintendent Bailey Watkins, Asphalt Plant Manager
When our outdated controls started to give us problems, we knew it was time to upgrade. We chose Astec because of the service. Astec has the absolute best service.
your Includes an updated A Stransplant T E C , for IN C .plant. an Astec Industries Company 4101Control JEROME Center, AVENUE Power • CHATTANOOGA, TN 37407 USA • 423.867.4210 • FAX 423.867.4636 • astecinc.com Center and all new The new system communicates timing and electrical switch gear.
tolerances when switching mixes extremely well. Now we know when the mix is in tolerance; therefore, we waste less asphalt. — Bailey Watkins Asphalt Plant Manager, Fred Smith Company
ASTEC, INC.
’’
an Astec Industries Company 4101 JEROME AVENUE • CHATTANOOGA, TN 37407 USA • 423.867.4210 • FAX 423.867.4636 • astecinc.com
WHEN YOU COME TO A FORK IN THE ROAD,
PAVE IT.
You face choices every day. And when you’re ready to grow your asphalt business, the right choice is simple. ADM offers four series of portable and stationary asphalt plants ranging from 60-425 tph. No matter the scope of the project or size of your operation, ADM can customize a plant to fit your needs.
Get started paving your road to success with ADM. START A CUSTOM PLANT DESIGN TODAY. 2 6 0 - 6 3 7- 5 7 2 9 admasphaltplants.com
Asphalt Drum Mixers
Here’s how it works
Step 1 The operator drives the PC1504 along the pavement to be grooved.
Step 3 A following water truck delivers water to cool the diamond blades and minimize dust hazard.
Step 4 The onboard vacuum system collects slurry and tailings, and discharges them to a separate tanker.
4
39
”
3
Step 2 The PC1504 cuts up to 39 inches wide.
Diamond Products’ PC1504 Pavement Grinder & Groover G
Grooving roads or airport taxiways requires precision work; the team at Diamond Products Ltd. Heavy Equipment Division, headquartered in Nampa, Idaho, built the PC1504 pavement grinder & groover to take care of that. Here’s how it works. The PC1504 has an adjustable front bogey assembly which allows for an effective wheelbase of 9’ to 11’ from center of the cutting head to center of front bogey. The wheel base can be adjusted for various grinding or grooving applications. The operator drives the diesel-powered PC1504 along the section of road to be grooved at a production rate of 0 to 30 feet per minute. Twelve-inch-diameter blades for grinding or grooving can be stacked up to a 39-inch cutting width. Depth control wheels for grinding are adjustable via hydraulically controlled screw jacks. Manually adjusted grooving depth control wheels are attached to the mainframe directly in line with the bladeshaft centerline for accurate groove depth control.
62 // august 2018
Power from the Caterpillar® 260-horsepower engine is transmitted through a manually operated PTO clutch to a right angle drive gearbox, which drives a single poly-chain GT carbon belt. The blade shaft turns at 1,400 to 1,900 revolutions per minute. A water truck follows in close proximity, delivering cooling for the diamond blades while minimizing any dust hazards. The onboard vacuum system, with diaphragm slurry pump, collects the slurry and grinding tailings, and discharges them to a separate collection tanker or other collection resource. The encoder unit incorporated into the ground drive control measures total daily footage ground and has a reset-able daily production odometer. Additionally, the encoder provides a feet-perminute indicator for the operator. For more information, contact Customer Service at (800) 321-5336 or visit http://www.diamondproducts.com.
advertiser index Almix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Ammann . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 Applied Test Systems . . . . . . . . . . . . . . . . . . . . . . .51 Asphalt Drum Mixers . . . . . . . . . . . . . . . . . . . . . . 60 Astec, Inc . . . . . . . . . . . . . . . . . . . . . . . . . 9, 42, 59 B & S Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 Bomag America . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Chemtek . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 ClearSpan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 CWMF Corporation. . . . . . . . . . . . . . . . . . . . . . . . 27 Dillman Equipmen . . . . . . . . . . . . . . . . . . . . . . . . 20 E.D. Etnyre . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 Fast-Measure . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 Gencor Industries . . . . . . . . . . . . . . . . . . . . . . . . . 4 Heatec, Inc . . . . . . . . . . . . . . . . Inside Front Cover, 55 Infratest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Kenco Engineering . . . . . . . . . . . . . . . . . . . . . . . ..45 KM International . . . . . . . . . . . . . . . . . . . . . . . . . 39 KPI-JCI-AMS . . . . . . . . . . . . . . . . . . Inside Back Cover Libra . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Meeker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31 Process Heating . . . . . . . . . . . . . . . . . . . . . . . . . .17 Pugmill Systems . . . . . . . . . . . . . . . . . . . . . . . . . 23 Reliable Asphalt Products . . . . . . . . . . . . . . Back Cover Roadtec . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3, 33 Stansteel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 Stansteel Used . . . . . . . . . . . . . . . . . . . . . . . . . . 64 Systems Equipment . . . . . . . . . . . . . . . . . . . . . . . 63 Tarmac International, Inc . . . . . . . . . . . . . . . . . . . . 25 Top Quality Paving . . . . . . . . . . . . . . . . . . . . . . . . 65 Willow Designs . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Wirtgen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
AsphaltPro’s advertiser index is designed for you to have quick access to the manufacturers that can get you the information you need to run your business efficiently. Please support the advertisers that support this magazine and tell them you saw them in AsphaltPro magazine.
www.THeAsphaltpro.com // 65
Here’s how it works
Step 1 The profiler takes readings and feeds information to the computer system.
Step 2 The computer “tells” the cutter drum how deep to profile grind.
Step 3 480 teeth smooth the pavement at a forward speed of about 40 feet per minute.
Step 4 Brooms sweep the fine material into a windrow for pickup by a street sweeper.
Diamond Road’s Smoother T
Taking the bumps out of roads takes precise work; the team at Diamond Road, located in American Fork, Utah, built the Diamond Road Smoother to perform that precision grinding. Here’s how it works. The Diamond Road team drives the Smoother to the project at posted travel speeds. Onsite, they activate the arrow boards located on the back of the equipment to guide motorists away from the worksite. The onboard laser system and camera system allow obstacles to be marked from inside the cab. The machine’s profiler and computer system ensure a smooth road is created from the corrected road profile. A 2,000-gallon water tank delivers cooling liquid to the cutter drum and helps keep dust down. The 8-foot-wide cutting machine holds 480 teeth, affixed twotenths of an inch apart. The diamond bits are designed to offer longer service life than carbide or other tips. A 4-inch taper on each end of the drum helps eliminate a vertical edge on either side of the grinding area. The Diamond Road Smoother grinds forward at
66 // august 2018
about 30 to 40 feet per minute and is able to move between bumps at about 5 miles per hour when leveling wheels are down. Two brooms on the sides sweep the tailings into a windrow of very fine material. A pickup broom follows to remove the tailings from the roadway. After the Smoother, cities and counties can return the roadway to traffic, or can perform sealing or thin overlays without bumps in the surface. For more information, contact Blake Attaway at (303) 913-4867 or visit http://diamondroad.com.
SHOW US HOW IT WORKS
If you’re an original equipment manufacturer with a complex product, let us help you explain its inner workings to asphalt professionals. There’s no charge for this news department, but our editorial staff reserves the right to decide what equipment fits the parameters of a HHIW feature. Contact our editor at sandy@theasphaltpro.com.
RAP IS WORTH WHAT IT REPLACES.
From Equipment to Application Any recycled product is worth what it replaces. To fully realize the value of RAP, you must process it back to its original mix design. As an Astec Industries group of companies, KPI-JCI and Astec Mobile Screens are leaders in RAP processing. We pair that with a wide selection of crushing, screening, and material handling equipment required to fractionate RAP and ensure the highest quality materials throughout the recycling process. Learn more at kpijci.com
KPI-JCI and Astec Mobile Screens
Astec Industries Companies
700 WEST 21ST STREET • YANKTON, SD 57078 USA • 800.542.9311 • FAX 605.665.8858 • kpijci.com
GENCOR 250-TON ASPHALT STORAGE SILO
RAP-15328
• SAFETY GATES • ELECTRIC HEAT ON CONE
CEDARAPIDS MAIN DRAG SLAT CONVEYOR
ASTEC PORTABLE COATER PARALLEL-FLOW DRUM PLANT
RAP-15069
RAP-15379
• 36” WIDE X 88’ LONG • REJECT CHUTE • 400 TPH
• 8X45 DRUM SHELL RUBBER AIRPLANE TIRE TRUNNIONS. • JET STYLE BURNER NOMINAL 120MBTU ON NATURAL GAS, HYDRAULIC ERECT SLINGER INLET, NO BELT • PORTABLE 4 BIN COLDFEED 8X14 24’’ FEEDERS EDI-CURRENT INDIVIDUAL SCALPING SCREENS UNDER BINS TANDEM AXLE
HEATEC HOT OIL HEATER
GENCOR/ BITUMA MAIN DRAG CONVEYOR
RAP-15380
RAP-14883
• HEATEC HOT OIL HEATER • YEAR 1997 • MODEL HCS-175 • 1.75MBTU CAPACITY • POWER-FLAME COMBO BURNER
• 400TPH • 102 FT OVERALL 98FT6IN SHAFT TO SHAFT • 100HP MOTOR WITH ASSOCIATED REXIII GEAR REDUCER • SINGLE STRAND CHAIN WITH CHROME FLOOR • 32IN INSIDE BOX • CHOP GATE MECHANISM PRESENT BUT PLATED OVER
3Qualified listings 3Complete retrofit capability 3All types of component reconditioning
REBUILT GENCOR HY-WAY HOT OIL HEATER
RAP-15071 • 1.0MBTU CAPACITY • PRESSURE TESTED COIL • REBUILT POWERFLAME BURNER • UPDATED CONTROL BOX
GENCOR PORTABLE RAP SYSTEM
RAP-15086 • NEW INSULATION & METAL JACKETING • REBUILT PUMP • NEW MOTOR • PRIMED & PAINTED
• GENCOR HAMMERMILL CRUSHER • 75HP MOTOR ON CRUSHER • 8X15 BIN OPENING • BIN EQUIPPED WITH GRIZZLY,
GENCOR STATIONARY PULSEJET BAGHOUSE
RAP-15337
PARTIAL EXTENSIONS AND BOTTOM HALF OF BIN LINED W/PLASTIC • 15HP MOTOR • 36IN FEEDER
THREE 200 TON ESTEE SILO SYSTEM
RAP-15066
• NOMINAL 75,000CFM • ESTIMATED MID 1990’S MODEL YEAR • KO BOX, DUCT, AND AUGER • 3 SECTION HOUSE, BAGS NEED REMOVED FOR TRANSPORT • SINGLE MOTOR EXHAUST FAN W/ STACK MOUNT DAMPER
• MODEL YEAR 1993 • NO TRUCK SCALE • 3 SILOS 200TON. 48FT DECK • DRAG HAS CHROME FLOOR HEIGHT AND TWO OF THE SILOS HAD • 80 FT SLIDING DRAG. 77FT CONE LINERS INSTALLED TWO SHAFT TO SHAFT. 350TPH YEARS AGO SINGLE STRAND CHAIN
3Custom engineering 3Experience with all types of plants 3Complete plants and stand alone components VIEW ALL OUR INVENTORY ONLINE AT:
Inc.
PO Box 519, Shelbyville KY 40066 • Fax 502.647.1786
www.ReliableAsphalt.com 866.647.1782