Concrete Contractor April 2018

The Edge of Innovation

22 April/May 2018

Polishable Overlays 54

Leveraging Technology

30

Rules for Designing CONTRACTION JOINTS 14 www.forconstructionpros.com/concrete CONC0418_01_CoverFinal.indd 1

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GPS

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Ligchine International and Topcon Positioning Solutions have spent years engineering our 3D systems to include the values that you will appreciate the most. Our systems can be easily transferred between your ScreedSaver machine and a vast number of other machines in your fleet requiring 3D capability.

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WHAT’S INSIDE

April/May 2018 | Issue 3, Volume 18

Cover Photo Credit: Wirtgen America

Departments 4 Editor’s Letter 6 Legal Matters 8 New Products 66 The Last Placement

What’s Online New Solar Systems Solve Construction’s Dead Battery Problem

Cover Story 30 Leveraging Technology A Kentucky concrete slipforming contractor has moved in a big way into curb, gutter and parapet construction by utilizing the advanced technology.

Solar array ruggedized for use on construction equipment deals with the profit and time drain from undercharged and dead batteries.

Search: 20997937

Features 14 Rules for Designing Contraction Joints To minimize random cracking in slabs-on-ground, follow these simple rules.

18 Adding a Ramp to a Parking Deck The contractor was chosen for the project based on their careful workmanship and attention to detail.

22 The Edge of Innovation Decorative concrete evolves as designers and owners push the envelope.

26 A New Interactive Design Tool for Pavement A design program that is simple to use.

36 The Right Flow When a concrete pump attachment is ideal for filling ICFs.

What’s the Difference Between Green and Red Laser Line Levels?

40 B18 Mini Concrete Placer With a gas and electric powered boom placement, this latest technology adds vertical reach to a boom pump operation and reduces labor on expansive deck placements.

Answers to the most common questions discussing into detail about brightness, diode technology, power consumption and common applications for both green and redbeam lasers.

Search: 20996852

42 Equipment Specification Guides: Screeds A compilation of technical information when choosing your next screed.

50 Safe Alternatives to Muriatic Acid By nature a tough material, a concrete’s strength is . . . well, its strength. But when it comes to maintaining and cleaning your tools that strength can be a problem.

54 Polishable Overlays The Decorative Concrete World’s Real- Life Philosophers Stone

60 Product Focus: Dust Collection A product round-up of the latest dust collection products.

www.forconstructionpros.com/concrete | April/May 2018 | Concrete Contractor 3

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EDITOR’S LETTER

PCA Releases Annual Spring Forecast

T

he Portland Cement Association has released the annual spring forecast and it’s quite positive.

According to a press release, it envisions modest growth for cement consumption over the next two years.

“PCA’s Market Intelligence Group estimates consumption to grow by 2.8 percent in both 2018 and 2019, and then to climb by 4 percent in 2020 as impacts from potential federal infrastructure spending are likely to take effect. The analysis estimates consumption at 99.3 million metric tons in 2018, 102.1 million in 2019 and 106.1 million by the end of 2020.”

Ed Sullivan, PCA senior vice president and chief economist says factors such as a strong economy, job market and anticipated increase in infrastructure spending – “suggest a modest acceleration in real GDP, construction markets and cement consumptions” While this is great news for the concrete industry as a whole, Sullivan suggests contractors won’t realize the true impact until the fourth quarter of 2019. This is in part due to the things that must occur including the passage of an infrastructure bill, bid letting and review and awarding contracts to contractors. Bottom line, the implementation is going to take time.

Sullivan says, “PCA has evaluated the time each process takes to Facebook.com/ ConcreteContractor

Advisory Board

Ryan Olson, Publisher/ Editorial Director ROlson@ ACBusinessMedia.com (800) 538-5544

impact actual construction activity. As a result, the timing of PCA’s impact of an infrastructure program on actual construction is later than most economists estimate.”

While the 4th quarter of 2019 is a long time to realize any of the benefits, time could be the biggest benefit to concrete contractors. I continue to hear from contractors who report being busier than ever before, with projects booked well into the end of 2018 and some even say into early 2019. Contractors continue to struggle to find skilled laborers which could slow down the completion of some projects, it appears to me contractors will be able to fill the time gap with the current work load.

It is my prediction, the current boom in construction projects utilizing concrete will not be going away anytime soon. In fact, come late 2019, I will predict the current construction boom will continue long into 2020, barring any major economic shift which could occur.

Follow us @ Concreteinsider

Kim Basham KB Engineering Cheyenne, Wyo.

Jim Cuviello Cuviello Concrete Polished|Stained|Crafted Stevensville, Md.

Jim Baty Concrete Foundations Association Mt. Vernon, Iowa

Chris Klemaske T.B. Penick & Sons, Inc. San Diego, Calif.

Search: Concrete Polishing

Dennis Purinton Purinton Builders, Inc. East Granby, Conn.

Joe Reardon Diamatic Orlando, Fla.

4 Concrete Contractor | April/May 2018 | www.forconstructionpros.com/concrete

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Published and copyrighted 2018 by AC Business Media, Inc. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording or any information storage or retrieval system, without written permission from the publisher.

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LEGAL MATTERS

By David Whitlock

New PAID Program: Be Careful How You Use It

R

ecently, the Department of Labor announced a new pilot program to resolve wagehour violations more simply. Called the Payroll Audit Independent Determination (or PAID) program, this pilot program is scheduled to begin in April and last for six months. Presumably, it will then be renewed. The purposes of the PAID program are to promote self-reporting of Fair Labor Standards Act (FLSA) violations and early resolution of claims. Concrete contractors should be very wary of this new program.

Although nearly all employers will be eligible, the program cannot be used if an investigation or litigation has already begun. Also, the program cannot be used by repeat offenders.

Employers must conduct a thorough self-audit and then report the results to DOL’s Wage-Hour Division.

This must include reporting the type or nature of the violation(s), the employee(s) affected, the duration of the violation(s), and the amount due to those affected. If the WHD agrees, the affected employees are notified and requested to sign a waiver of litigation. If the employee signs the settlement agreement, then the employer must pay the amount the WHD has determined is owed.

There are some advantages or benefits from this program. First, claims can be resolved much faster than the “normal” route where the agency investigates and ultimately reaches a determination. This should make the process more efficient and affordable for employers. Second, PAID settlements would not include liquidated damages or civil money

penalties. Third, an employer may avoid significant litigation expenses and attorney fees. But there are also risks.

First, many employers are understandably reluctant to volunteer to a federal agency that they have violated the law. It is also unclear whether current information sharing agreements between the WHD and about one-third of state labor agencies would trigger a separate audit at the state level. Even if PAID program data is not shared with state agencies, the WHD settlement agreement may not apply to separate state-level claims, and many states have wage and hour laws that are more strict than the FLSA. Second, affected employees can choose to reject the PAID settlement. This may be because they foresee a greater recovery in litigation where there is a possibility that they could get a liquidated damages windfall. It is unlikely that a plaintiff’s lawyer would encourage an affected individual to accept the PAID settlement.

According to what the DOL has published so far, there is no general release associated with a PAID settlement. Instead, the release that the WHD will offer the employee will only address the claim(s) identified and paid for by the employer. Thus, employees may reject the PAID and seek a larger award in litigation.

The PAID process may actually increase the risk of litigation. This is so for several reasons. The plaintiff’s bar is likely to encourage employees not to participate and may seek to establish class actions. Also, documents that the employer produces to the WHD may be discoverable

through litigation or a Freedom of Information Act request, which will also increase the prospect of litigation. Moreover, as noted above, state law claims are not precluded by PAID settlements, so it is possible that the employer may pay out 100% of back wages under federal law only to be sued by the employee under state law. Employees who opt out of the PAID process may still file suit seeking liquidated damages – essentially double the back pay award.

While not a huge risk where the back pay amount is relatively small, in a misclassification claim where the employee is claiming entitlement to overtime pay, the amount at stake can be much more substantial and doubling that amount may make the risk of litigation worthwhile.

Until DOL publishes more information about program eligibility, it will be unclear what happens to an employer that applies for the PAID program but is rejected by the WHD. Presumably, PAID program participation is not a confidential matter, so it is entirely possible that the employer seeking to resolve FLSA issues quickly and efficiently may wind up in protracted audits and litigation anyway.

The bottom line is that concrete contractors should “wait and see” what develops before plunging into a PAID program.

David C. Whitlock has over 25 year’s experience in business immigration, compliance, employment counseling and training. He is the founding attorney of Whitlock Law LLC and can be reached at (404) 626-7011 or at davidcwhitlock@gmail.com.

6 Concrete Contractor | April/May 2018 | www.forconstructionpros.com/concrete

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It’s the engine that Honda doesn’t want you to see.

This is real innovation. This is productivity defined.

Decades old engineering won’t cut it on today’s jobsites. That’s why our new line of Vanguard™ Single Cylinder engines are designed from the ground up to deliver what you want – and need – on the job. They’re challenging the competition where it counts, including starting, performance, and reduced maintenance. You asked. We delivered.

See it for yourself. Go to productivitydefined.com.

See www.vanguardengines.com for complete warranty details. © 2018 Briggs & Stratton Corporation

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NEW PRODUCTS Minnich M-Box Vibration Control Solution

Vexcon Chemicals Announces New High Performance Coatings

Vexcon Chemicals is pleased to announce Vexcon’s ProCoat brand of epoxy and urethane durable coatings for concrete.

ProCoat are high moisture tolerant, 100% solids epoxy coatings designed to protect and seal a variety of concrete surfaces.

This high build system effectively prevents moisture related issues such as bubbling and peeling.

Vexcon offers standard and customized systems utilizing the latest in polymer technology. ProCoat are high build seamless floors that can be used with decorative quartz and vinyl chip systems to create a variety of textures and aesthetics.

• Superior Durability • Chemical & Abrasion Resistance ForConstructionPros.com/20988263

The M-Box is a control speed high-cycle power converter that enables high-cycle vibrator operators to control the speed/vibrations per minute (vpm) of up to two vibrators.

• Select from speeds of 6,000, 8,000 and 10,800 vpm • Converts the 230-volt, single-phase output of a 3,500-watt generator to 230-volt, three-phase output • Allows operator to choose a uniform and compatible constant speed under different concrete loads • Ability to apply the most force with the lowest speed maximizes vibration quality ForConstructionPros.com/20991100

Advanced Formula QUIKRETE Concrete Resurfacer

Designed to provide a permanent wear resistant surface that can withstand foot, vehicle and other heavy traffic, the new upgraded QUIKRETE Concrete Resurfacer formula delivers 3x greater bond strength, improved workability and extended working time. As a result, it’s easier and faster to transform and old worn concrete surface into a durable, long-lasting sidewalk, driveway or patio.

The new QUIKRETE Concrete Resurfacer, packaged in an exclusive Weather Barrier Bag, is a special blend of Portland cement, sand, state-of-the-art polymer modifiers and other proprietary additives, designed for surface renewal.

ForConstructionPros.com/20991101

Super Lynk from Meadow Burke

Introducing Meadow Burke's new panel to foundation product Super Lynk.

Super Lynk is a fast, strong and discrete way to permanently connect concrete panels to footings. It requires only a single bolt to make the connection - no welds, grout or epoxy. Super Lynk saves time and money, offers improved performance over other panel to footing connections by meeting ACI 318 which requires a 10,000lb tension load and offers improved aesthetics with its low profile.

• Tension Load - 10,000 lbs.

• Width - 8" • Height - 10" • Weight per unit - 10.5 lbs.

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Ameripolish X-Link E Pecora-Deck 800 FC

Durable Pecora coating systems deliver resilient protection against the elements and traffic, whether its' for maintenance, restoration, or a new structure. PecoraDeck 800 FC features: • Two-component • Fluid-applied, fast cure, polyurethane multi-coat system • Abrasion and wear protection • Defends against UV damage, airborne chlorides and freeze-thaw • High solids, low odor for exterior and interior applications • Low VOC, complies with federal VOC EPA regulations • Field tintable • Available in factory premixed standard colors and non-standard colors ForConstructionPros.com/20990940

Ameripolish X-Link E is a modified urethane high Features gloss sealer.

Modified from our original X- Link WL , X-Link E provides a true wet look.

X-Link E is extremely durable and breathable from beneath the concrete.

X-Link E is designed for use with ColorJuice Extreme, but can be used to seal natural concrete as well as other cementitious surfaces such as, porous brick, natural and manufactured stone, stucco, slate and flagstone.

• RTU = Ready to use • Provides high gloss/ wet look on broom finished concrete • Breathable and fast drying ForConstructionPros.com/20991993

Bosch Three-Plane Leveling and Alignment Line Lasers

The GLL3-330CG (green beam), GLL3-33C (red beam) and GLL3-300 (red beam) provide one 360° horizontal plane and two 360° vertical planes with references that cover the floor, wall and ceiling.

• Two vertical lines cross at 90° angles for arranging and squaring the layout of a room from one mark • Visible range up to 200-ft. diameter ForConstructionPros.com/20992514

8 Concrete Contractor | April/May 2018 | www.forconstructionpros.com/concrete

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NEW PRODUCTS Multiquip MQ Whiteman TuffTruk

The four-wheel-drive TuffTruk features optimal climbing ability and traction in mud or sand, as well as an articulated design for enhanced maneuverability.

• 10.6-cu.-ft. capacity steel tub carries material or debris • Easily passes through 36-in.-wide openings • Battery powered TB11 includes an integral 120-volt battery charger and regenerative braking, and provides an 8-hour run time under full load • Gasoline-powered version utilizes a 4.8-hp Honda engine and hydraulic drive ForConstructionPros.com/20992827

Solomon’s Innovative Texturing Tools

Brickform - a Division of Solomon Colors, officially unveiled the new Concrete Dimensions reusable urethane stencils at the 2018 World of Concrete. Concrete Dimensions are the latest innovation for decorative concrete, allowing users to easily create crisp, defined designs in concrete. Floated into fresh concrete, Concrete Dimensions works ideally with exposed aggregate, smooth troweled, broom finished, and lightly stamped surfaces. Designed to produce detailed impressions with complete reusability,

the durable urethane stencils hold up to repeated use on job after job. With custom designs available, there is a Concrete Dimensions pattern for any circumstance.

ForConstructionPros.com/20992832

CEM-KOTE FLEX ST from W. R. MEADOWS

Waterproof reinforced concrete structures and protect against chemical attack with CEM-KOTE FLEX ST, W. R. MEADOWS’ flexible cementitious waterproofing option.

CEM-KOTE FLEX ST is a two-component, breathable, fiber-reinforced cementitious coating consisting of a dry and liquid component. Designed for positive and negative waterproofing, CEM-KOTE FLEX ST is effective in both new construction and restoration projects. It can easily be applied by brush or sprayed to suit the application.

ForConstructionPros.com/20997538

Wacker Neuson CRT60X Hydraulic Ride-on Trowel The 10-ft. CRT60X (CRT60-74LX) is powered by a 74-hp Kohler, non-DPF Tier 4 Final engine that enables it to easily maintain rpm under high load finishing conditions. A heavy-duty hydraulic system includes a high-capacity hydraulic pump and motors. An easy-to-read display provides information such as machine hours, fuel level, engine rpm, fluid temperatures and pressures and alerts. Features include electronic cruise control, adjustable seat, plenty of legroom, ergonomically positioned arm rests, simple joystick controls and fully hydraulic blade pitch. LED lights and a built-in hydraulic wheel kit are also included.

ForConstructionPros.com/20992962

Atlas Copco Introduces Retrofit Dust Suppression Spray Kit

Atlas Copco Power Technique North America has introduced a 36-inch retrofit dust suppression spray kit for handheld tools. The kit can be attached to an Atlas Copco handheld breaker, rivet buster or chipping hammer and helps to comply with requirements of the Occupational Safety and Health Administration (OSHA) final silica rule.

The dust suppression spray kit is equipped with a nozzle that can cover an 80-degree cone around the tool at 40 psi of pressure, dispensing six gallons of water per hour. The kit connects to a garden hose, making it simple to utilize any water source on a jobsite.

Kit minimizes workers’ exposure to harmful silica dust through a continuous spray of water at the point of impact, which flushes the dust before it becomes airborne.

ForConstructionPros.com/20993481

General Equipment Introduces Next Generation of FCS16 RIP-R-STRIPPER

General Equipment Company introduces the new FCS16 Gen 3 RIP-R-STRIPPER. Enhancing the proven design and effectiveness of the previous FCS16 model, the Gen 3 unit features an advanced blade clamping system, improved centralized lubrication, quick-release operator handles and integrated static weights to maximize productivity when removing VCT tiles, rubber-backed carpeting and other sheet-type coverings from wood and concrete surfaces.

• The FCS16 Gen 3 is powered by a quiet ¾-horsepower, 115/230 VAC, 60-Hertz electric motor and offers a maximum cutting width of 16 inches.

ForConstructionPros.com/20992098

Mondo Poly Brush from Wagman Metal Products

Wagman Metal Products Inc., a manufacturer of power trowel replacement blades, pans and innovative trowel attachments for scrubbing, stripping, and polishing, introduces a new Polypropylene brush - the Mondo Poly Brush.

• The stiff polypropylene bristle is good for general scrubbing on smooth concrete including cleaning floors after tilt-up construction and applying densifiers.

• The brush will not rust and is resistant to many chemicals.

• The Mondo Poly brush can be used on 36” and 46” walk-behind as well as 6’ and 8’ ride-on power trowels.

• The 11” size can be used on the Wagman LP230.

ForConstructionPros.com/20994118

10 Concrete Contractor | April/May 2018 | www.forconstructionpros.com/concrete

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NEW PRODUCTS Eucild’s Increte Systems Introduces LEVEL TOP POLISH and LEVEL TOP PC-AGG

Eucild’s Increte Systems introduces two new product additions to the Level Top family of self leveling overlays. Joining the top selling stainable overlay, LEVEL TOP-STAIN, is, LEVEL TOP POLISH, a high early strength self leveler that can be polished 24 hours after application.

Incredible hardness equals incredible shine and that’s what you get with LEVEL TOP POLISH. LEVEL TOP PC-AGG has a black and gray aggregate that when exposed and polished gives you a true salt and pepper polished concrete look (hence the PC name). Proprietary suspension agents hold that aggregate near the surface reducing the time and labor needed to expose the rock.

ForConstructionPros.com/20997765

New Spray Upgrade on the Grand Finale Coatings Applicator

Aztec is pleased to present the new SPRAY GRAND FINALE, a 2-in-1 coatings applicator that uses a microfiber pad to apply floor finish, concrete densifiers, hardeners and sealers quickly and uniformly. The new hand spray upgrade features a flexible hose to access smaller, hard to reach areas.

• The Grand Finale, now available in both 24” (61 cm) or 36” (92 cm) pad widths, provides an easy, high-speed way to lay down a smooth, uniform coat of chemicals at up to 35,000 sqft/hr (3252 m2/hour).

• At 8X faster than the traditional mop and bucket method, the Grand Finale eliminates baseboard splash and puddling, all while reducing chemical usage by 30% and eliminating strenuous labor and injury.

ForConstructionPros.com/20997775

The Tailgater Is Now Powder Coated

The Tailgater is proud to announce that its product is now powder coated. Powder coating ads to the value and durability of the chute attachment that is changing the world.

Contractors and producers across the world are enjoying an easier way to pour their concrete.

Everyone loves pouring faster and spilling less too. Buy yours today!

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ForConstructionPros.com/10303328

12 Concrete Contractor | April/May 2018 | www.forconstructionpros.com/concrete

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Kingdom Products’ Imperial Stucco Mix

Imperial Stucco Mix is a one-component, polymer modified, fiber-reinforced stucco system formulated to provide a long lasting, durable and water-resistant finish that blows the competition away. Imperial Stucco System can be applied over a traditional wire lathe system or it can be applied directly to a clean, sound substrate in conjunction with Kingdom Products’ Superbond Polymer/Primer. Available in five standard colors, Imperial Stucco is integrally pigmented during the blending process to ensure uniformity in each and every bag.

ForConstructionPros.com/20999139

B42R19R Tilt Up Wall Braces from Dayton Superior

Features and Benefits: • B42R19R is 42' fixed length brace with 15" adjustment • B42R19R brace Safe Working Load is 12,667 lbs. with 1.5 safety factor • Features foot plate with one hole for brace bolt attachment • According to Dayton Superior, with a 19,000 lbs. ultimate load capacity, the B42R19R Tilt-Up Brace is the strongest 42' brace on the market B42R19R Tilt Up Wall Braces are all steel, heavy duty wall braces made out of 7" diameter tube and designed to quickly and easily align and brace tilt up wall panels.

ForConstructionPros.com/20998768

Travertine Texture Mats from Butterfield Color

Butterfield Color’s Travertine texture mats were cast from natural travertine slabs chosen for their outstanding character and interest. These seamless texture mats can be used for a variety of applications from texturing residential hardscapes and borders to large commercial slab applications.

• The possibilities of saw cut line patterns and arrangements are endless and limited only by your imagination.

• These texture mats offer the appeal of a natural travertine slab in an easy to use, high quality, feather edged mat system.

• Available in four sizes ranging from 18” x 18” to 48” x 48” (including 24” and 36” sizes). The larger sizes come with equipped with handles for ease of use and rotating.

ForConstructionPros.com/20996819

ForConstructionPros.com/10071889

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FLATWORK/ SLABS

By Kim Basham, PhD PE FACI

Rules for Designing

CONTRACTION JOINTS To minimize random cracking in slabs-onground, follow these simple rules.

C

ontraction joints (sometimes called control joints) are used in unreinforced and lightly reinforced slabson-ground to minimize random cracking. By creating straightline weakened-planes in concrete, contraction joints “control� the cracking location by inducing cracks at predetermined locations.

As slabs shrink due to cooling and drying, shrinkage or tensile stresses start building and cracks form at contraction joints because the concrete is weaker or thinner at these locations. (Fig. 1).

Contraction joints are typically installed with jointing tools while the concrete is still plastic or by sawing

after the concrete has been finished with either a wet-cut saw or more commonly, an early-entry dry-cut saw. For either method, follow these jointing rules to minimize the risk of random or out-of-joint cracking.

LAYOUT Joint design including the layout is the responsibility of the slab designer.

Figure 1: Sawcut creates weakened plane inducing crack below sawcut.

Photo Credit: Kim Basham

Figure 2: Keep For a specified jointed panels as project, the engisquare as possible neer or architect and limit length of long side to is responsible about 1.25 x short for designing side for better the joint layout crack control but absolutely no but for unspecmore than 1.5 x ified work, the short side. concrete conPhoto Credit: tractor typically Kim Basham becomes the designer.

Rule #1. Panels formed by contraction joints should be as square as possible. The joint layout should divide a large slab into relatively small, square shaped panels. Avoid long and narrow panels, L-shaped and T-shape panels. The long side should never be larger than 1-1/2 times the short side. For better crack control, limit the length of the long side to 1-1/4 times the short side (Fig.2).

Rule #2. Contraction joints should be continuous, not staggered or offset. Due to stress concentrations that occur where joints (i.e., cracks) terminate, cracking will continue into the

14 Concrete Contractor | April/May 2018 | www.forconstructionpros.com/concrete

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Figure 3: Avoid discontinuous joints.

If unavoidable, use 2 or 3 #4 x 3 ft. to intercept and control discontinuous joint cracks.

Photo Credit: Kim Basham

unjointed concrete. If discontinuous joints cannot be avoided, insert two or three #4 x 3 feet reinforcing bars in the next slab to intercept the crack that will grow from the discontinuous joint (Fig. 3). Use reinforcing chairs to hold the bars in place in the top 1/3 of the slab.

Rule #3. Identify and address re-entrant corners. If re-entrant corners are unavoidable, locate contraction joints to control cracking that starts at re-entrant corners or place “corner� reinforcing bars diagonally in front of re-entrant corners to intercept cracks (Fig 4).

Corner rebars should hold re-entrant corner cracks tight together and help prevent them from traveling across the entire slab.

Rule #4. Install contraction joints at locations where slabs typically crack. Implementing this rule takes experience or inspection of existing flatwork. When walking around town, inspect concrete slabs for cracking.

With time, a better understanding of typical crack locations will become apparent. For example, place a contraction joint about three feet from the end of a triangular-shaped slab because that is the location where cracks typically occurs (Fig. 5).

joint spacing between 12 and 18 feet.

In general, the two to three times the slab thickness recommendation has produced acceptable results if some panel cracking is acceptable. In fact, up to three percent of floor slab panels formed by a combination of saw cutting and construction joints may crack at locations other than the contraction joints.

Rule #5. For better crack control keep the maximum distance between joints in feet at 2 to 2.5 times the slab thickness in inches. For a six inch thick slab, the maximum joint spacing

should be limited to 12 to 15 feet.

Exceeding a joint spacing of 15 feet for a six inch thick slab will increase the potential for random or out-ofjoint cracking. In general, reducing the joint spacing or panel size reduces the risk of random cracking.

Also, reducing joint spacings will reduce crack widths within contraction joints which increases the aggregate interlock. Increasing aggregate interlock improves the load transfer capacity and helps maintain better vertical alignment across joints.

Rule #6. For sidewalks and driveways, space transverse contraction joints at intervals about equal to the slab width. For four inch thick sidewalks and driveways wider than about 10 feet add a longitudinal contraction Figure 4: Avoid re-enterant corners. If unavoidable, use 2 or 3 #4 x 3 ft. rebars to intercept and control re-enterant crack.

Photo Credit: Kim Basham

MAXIMUM JOINT SPACING Historically, the maximum recommended distance or spacing in feet between joints has been two to three times the slab thickness in inches. For a six inch thick slab, this recommendation yields a maximum

Figure 5: Place contraction joints where shrinkage cracks are likely to occur.

Photo Credit: Kim Basham

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FLATWORK/ SLABS joint along the center and keep the panels as square as possible.

JOINT DEPTHS Contraction joints must be deep enough to ensure they are truly weakened planes that crack before random or out-of-joint cracking occurs. If weakened planes or thin slab sections other than the contraction joints exist, random cracking may occur.

Rule #7. For tooled or grooved joints, depth of the contraction joint should be 1/4 of the slab thickness. For interior floors, specify a 1/8 inch edge radius for the top of the groove or joint.

Specify an edge radius of 1/4 to 1/2 inch for exterior slabs.

Rule #8. For wet-cut sawcut joints, depth of the contraction joint should be 1/4 the slab thickness or a minimum of 1 inch. To ensure joint activation or cracking, sometimes a sawcut depth of 1/3 the slab thickness is specified. However, there will be less aggregate interlock with a deeper joint. The depth tolerance for sawcut joints is ± 1/4 inch.

Rule #9. For joints installed with an early-entry dry-cut saw, joint depth should be 1-1/4 inches with a ± 1/4 inch tolerance for slabs with thicknesses up to 9 inches. For thicker slabs, the saw cut depth should increase to ensure joint activation. Also, saw cut depths are typically increased for fiber reinforced slabs. Fibers increase the tensile capacity of the uncut concrete beneath saw cuts so deeper saw cuts are typically required to create a weakened plane.

For fiber reinforced slabs, contact the fiber technical representative for recommended saw cut depths to insure joint activation.

SAWCUT TIMING In addition to depth of contraction joints, saw cut timing is critical to minimize random cracking. In general, saw cut joints should be installed as soon as the

concrete is sufficiently hard to resist tearing and raveling and before random cracking occurs.

Early-entry dry-cut saws are more popular because joints can be installed sooner (one to four hours after finishing) than joints installed with wet-cut saws (four to 12 hours after finishing). Early-entry drycut saws allow the installation of the contraction joints before the concrete starts to cool and before shrinkage stresses become too large or exceed the tensile capacity of the concrete.

Rule #10. Start saw cutting as soon as joint raveling (loss of aggregate particles) no longer occurs. However, some minor edge raveling is acceptable to ensure joints are installed before the concrete shrinkage stresses become too large.

Kim Basham is president of KB Engineering LLC, which provides engineering and scientific services to the concrete industry. Basham also teaches seminars and workshops dealing with all aspects of concrete technology, construction and troubleshooting. He can be reached via e-mail at KBasham@KBEngLLC.com.

References

1. Craftsman Workbook Publication CP-10(10), American Concrete Institute, www.concrete.org 2. ACI 302.1R-15 Guide to Concrete Floor and Slab Construction, American Concrete Institute, www.concrete.org 3. ACI 360R-10 Guide to Design of Slabson-Ground, American Concrete Institute, www.concrete.org

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FOUNDATION & WALLS

By Joe Nasvik

Adding a Ramp to a

PARKING DECK The contractor was chosen for the project based on their careful workmanship and attention to detail.

T

he Bartley Corporation based in Ashton, Md. focuses primarily on concrete foundations, commercial building slabs, and they have occasionally constructed concrete houses. So they were a little surprised when a general contractor they had worked with in the past contacted them about doing a rehab project

for a parking ramp located in a congested part of downtown Baltimore. Andrew Bartley, the company’s executive vice president, says the GC wanted them to do the work because they liked their careful workmanship and attention to detail. After looking carefully at the project at first in doubt, Bartley decided they could do the work and proceeded to estimate the job.

It ended up becoming more of a negotiated bid then a competitive bid.

The One E Pratt Street Garage was built several years ago and the entire top deck level was designed as an atrium patio for people use rather than for vehicles. But over the years there was increased need for parking spaces and the owners decided it was time to adapt the facility. This

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The top level of this Baltimore parking ramp was once a pedestrian plaza but the need for 150 new parking spaces led to a rehab project performed by the Bartley Corporation.

Photo Credit: Bartley Corporation

involved removing some of the top deck to construct a car ramp, adding support walls to the side of the new ramp, constructing a support beam, constructing a large planter on the top deck to separate parking spaces from people leisure space, and placing a 3.5-inch concrete topping in the new parking area. In addition, several columns had to be strengthened and engineers identified many locations that required shoring during construction.

Challenges also included keeping the parking facility open for business at all times.

CONSTRUCTION PROCESS Creating the opening for the ramp and other demolition was completed by another contractor before Bartley started their contract. After mobilizing for the project the first task was to install shoring in locations decided upon by Rathgeber/ Goss Associates, the engineer for the project. The next task was to further strengthen the columns located near the new ramp. Then a wall under one side of the ramp was formed and cast to help support the new ramp. Much of this wall was formed on one side only, the other side was backed up against a deck and concrete beam wall. After the new ramp was formed and cast the wall was continued

above the ramp to the deck above.

With the completion of this wall Bartley formed and cast a large beam to tie the top deck to the new wall for added support.

A separate contractor removed the existing unit pavers over the new 46-car parking area and installed a waterproofing vapor barrier. Bartley then installed a 3.5-inch concrete topping over the membrane.

The last step for Bartley was the construction of the concrete planter separating the new parking area from the remaining terrace where people can gather to eat their lunches or relax.

CHALLENGES Bartley says the project posed a number of challenges for them.

These included flexing in the deck floors of the ramp, a congested work area, continued use of the facility during construction, heavy traffic around the site, and little space for construction equipment.

When the original parking facility was constructed “Double T’s” were used to construct the floors of the ramp and all floor levels had considerable flex, Bartley thinks as much as one and one-half inches caused by the weight of moving vehicles. Bartley was concerned this would cause problems where their formwork came into contact with the decks. But this was partly mitigated by the engineer requirement for shoring as the first

step in the construction process. It reduced movement in the structure and helped to support the top deck after the opening was created for the ramp. But there was still some movement where the lower wall met the new ramp and where the walls above the ramp came into contact with the floor above. Bartley adds that the small amount of damage that resulted from this movement wasn’t structural and the owner permitted cosmetic patching in those places. They also used “stay forms” (forms that stay in place) where the new ramp met the Double-T’s on the top deck—a location that was difficult to remove forms

A demolition contractor created this opening for the new ramp and this is what the job looked like when Bartley’s contract started.

Photo Credit: Bartley Corporation

PROJECT PARTICIPANTS: Owner: East Pratt Stategic Venture, LLC New York, N.Y. Architect: Urban Design Group, LLC Baltimore, Md. Engineer: Morabito Consultants Sparks, MD & Rathgeber/Goss Associates Rockville, Md. Concrete Contractor: The Bartley Corporation, Ashton, Md. Ready-mix Producer: Bay Ready Mix Anapolis Junction, Md. Concrete Pumping Contractor: Jernigan Concrete Pumping, Inc Harmans, Md.

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FOUNDATION & WALLS The timbers on the deck spread the load as forming for the ramp started.

Photo Credit: Bartley Corporation

With the walls and ramp in place this new beam was formed and cast to supply support to the structure.

Photo Credit: Bartley Corporation

after concrete was placed. It also served as an isolation joint that limited deck movement from reaching the freshly placed concrete.

The congestion of the site, the heavy traffic in the area, and the fact that the parking ramp had to remain The worker in open during the this photo is construction was also cutting control joints in the 3.5a big challenge. The inch topping on ramp is located in a the top deck. busy part of the city Photo Credit: and this lengthened Bartley Corporation ready-mix and other material delivery times. There was limited space for construction trucks, cranes and concrete pumping trucks to work on site, and often times trucks had to take turns for spots when they were needed. These spaces had to be shared with other trades working on site too. No construction vehicles could park inside the ramp due to customer use but Bartley said they could use one of their pick-up trucks to bring tools and materials to their work areas. Most materials however were lifted to work areas in boxes by a crane. Weather was an issue too. On one hot summer day “hot concrete”

plugged the concrete pump and the crew had to completely clear the pump and clean the line.

HOW IT TURNED OUT The general contractor chose Bartley because they had faith in the company—that they would perform the careful work that was needed, even though it wasn’t the type of work that Bartley specialized in.

The construction went well and the owners were happy with the result.

The ramp and walls turned out well, the waterproofing and the 3.5-inch

concrete topping went without a hitch, and the patching and rubbed finish on the new work made the new work seem like it had always been there and the ramp now serves more customers.

Joe Nasvik is a writer and editor serving the concrete industry. He has 18 years experience as a concrete contractor.

Contact him at jnasvik@ sbcglobal.net.

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DECORATIVE CONCRETE

By Sean O’Keefe

The Edge of

INNOVATION

Decorative concrete evolves as designers and owners push the envelope.

T

he leading edge of design will always be in the distance, a constant challenge most in the building industry find compelling. Designers want to innovate because their clients expect a wow factor in the finished product.

Builders must make it happen, stretching to find subcontractors with the precise knowledge, skill and equipment required to deliver whatever the leading-edge innovation is. For both designers and builders, keeping up with the curve is critical.

When it comes to high-performance, indoor/outdoor hard surfaces, Bomanite® is the most recognized name in architectural concrete.

“Architects are often looking for something new or unique, an answer to a problem. That’s where we excel,” says Terry Grimble, Director of Technical Services for The Bomanite Company. With a 70-year history,

Bomanite is recognized as the inventor of stamped concrete, exclusively establishing the techniques and market for high-performance, imprinted, decorative and ornamental concrete in the 1950s. Today, Bomanite products are being installed independently by Licensed Contractors all over the U.S. on commercial and residential projects of every scope and scale. Bomanite’s collective knowledge and resources are available to each of the 50 independent contractors across the country when challenges arise and technical or logistical expertise is required.

When Texas Christian University renovated their football stadium the design objective for Founder’s Plaza was to emulate a map view of Fort Worth, Texas including city streets, railroad tracks, and the Trinity River.

After offering design assistance in planning 40,000 sq. ft. of highly decorative exterior walkways around the stadium, Texas Bomanite completed the installation of multiple finishes, with logos, lights and letters imbedded throughout. Being able to draw upon the collective knowledge of the Bomanite Company and 49 other

When the Northside Church in Clovis, Calif. decided to reinvent the plaza space in front of the church as a dynamic new baptismal center, designers selected a combination of the Bomanite Sandscape Refined Antico finish in Bomanite Light Brown and three integral colors in a Bomanite Sandscape finish to get the cohesive yet varied look they wanted.

Photo Credit: Bomanite

colleague contractors working with Bomanite products is always an asset.

“Our goal is to be able to economically recreate all of the finishes we develop on a much larger scale, in a way that can be installed using tools and equipment common to the industry at generally any place in the U.S.,” says Grimble. In addition to establishing the chemical compositions and installation techniques for products, Bomanite also produces technical details and product samples that can be shared with architects for specification, and marketing materials for licensees.

The increased desire for public wet-play surfaces like those found in water parks has also contributed to the growing range of decorative concrete products offered today. At the Tandy Family YMCA in Tulsa, Okla.,

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DECORATIVE CONCRETE designers GH2 Architects introduced a dynamic splash pad at the main entrance as a public amenity. With any wet play surface, hardscape materials need to account for a coefficient of friction to make them safe for energetic, bare foot play on a hot summer day. Bomanite Sandscape is ideal, combining locally sourced aggregates, colored sands and custom glass to create a granulated surface texture speckled with shiny glass jewels. GH2 and the Y’s leadership selected a combination of Bomanite Revealed (Custom Blue Glass) and Bomanite Sandscape Texture (Gobi Desert Integral Color) techniques.

“This project called for highimpact, aesthetically pleasing, and long-lasting architectural concrete,” says Jeremy Carlisle, Associate Principal with GH2 Architects.

“Perhaps just as importantly, we needed it to be installed by a

team with the technical knowledge to tackle a very challenging configuration and complex coordination.”

Bomanite takes pride in the meticulous development of compositions and finishing processes

that can be readily installed in the field. With practicality for the builder, durability for the product, and highquality for the owner all in mind, Bomanite goes through as many as 50 iterations before finalizing the technical details of laying a new type

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The increased desire for public wet-play surfaces like those found in water parks has also contributed to the growing range of decorative concrete products offered today. At the Tandy Family YMCA in Tulsa, Okla., designers GH2 Architects introduced a dynamic splash pad at the main entrance as a public amenity.

Photo Credit: Bomanite

of concrete surface. An example of a newer product, the Bomanite Antico process is used to create fissures, voids and other random effects simulating a semi-worn stone surface comparable to natural pitted limestone or a travertine tile.

When the Northside Church in Clovis, Calif. decided to reinvent the plaza space in front of the church as a dynamic new baptismal center, their primary goal was to create a place where people feel welcome and connected. There, designers selected a combination of the Bomanite Sandscape Refined Antico

finish in Bomanite Light Brown and three integral colors in a Bomanite Sandscape finish to get the cohesive yet varied look they wanted.

“Decorative concrete is wonderfully flexible in terms of being able to create virtually any combination of color and texture and shape imaginable at a reasonable cost,” says Terry Broussard, Principal with Broussard Associates, who led landscape architecture services for the redeveloped space in front of the church. “Bomanite’s products are a very viable solution for public spaces where design matters and ordinary broom finished concrete isn’t going to feel special.”

Samples are a critical component of the product specification process taking place in design studios across the country, and decorative concrete finds no exception for either size or complexity.

“Concrete isn’t paint,” says Grimble with a smile. “There are a lot of variables, from the selected aggregate’s specific gravity and color influences to the ready-mix producer’s material composition.” Standardized and custom three-inch square chips developed in Bomanite’s Denver, Colo. laboratory allow architects, owners, and contractors to hold the real thing on a smaller scale, demonstrating clearly that design intent is understood. “These samples are basically a business card and we are heavily invested in controlling quality and confidence in the finished project. They are far more accurate than a color chart or product photograph could ever be.”

While the edge of design will always be elusive, innovation is constant and Bomanite allows the building industry to continually increase their wow factor expectations.

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CONCRETE PAVING

By Joe Nasvik

A design program that is simple to use.

M

any associations, organizations, and businesses have developed programs in the past to help their constituents produce specifications for a variety of concrete pavement applications. For smaller projects with no specifications contractors relied upon what they knew and ready-mix producers supplied concrete that was thought to be adequate for the situation. You could also get training about how to install pavement from experts or companies such as ready-mix producers, construction supply houses, admixture companies, or other suppliers of materials used in pavement construction. Sometimes it came down to doing what you have always done.

Jerry Voigt, president and CEO of the American Concrete Pavement Association (ACPA), says that one problem with the many specification

programs for pavement was that they often produced different results.

For instance, if a pavement was being designed for light traffic one specification might call for five-inch thick pavement while another might require six-inch thick concrete—putting in the same information yielded different results. This might not seem to be very important but if only fiveinches were actually needed, adding an additional inch would only add to the cost of the job.

By 2015 there was talk of creating one pavement specification program that all could support. Up to this time the ACPA offered a program they called “StreetPave,” the National Ready-mix Concrete Association (NRMCA) offered “Pavement Analyst,” the Portland Cement Association (PCA) had their own program, and the American Association of State Highway and Transportation Officials (AASHTO) offered a program called “AASHTOWare Pavement ME” to name a few. So in

➤

A New Interactive Design Tool for Pavement

The new internet interactive pavement design program created by the ACPA, PCA, and NRMCA makes it easy to design a wide variety of pavements—even residential driveways.

Photo Credit: American Concrete Pavement Association

2016 the ACPA, NRMCA, and the PCA entered into an agreement as equal partners to development a “one-stop-shop” pavement program that would meet the design requirements for all types of pavement with the exception of “Pavement ME” which focused on high volume design issues. The ACPA agreed to lead the project. Voigt indicates this project is the largest collaborative project ever undertaken by these three industry associations, which has also garnered additional attention and support from others including the RCC Council. They call the new program “PavementDesigner.”

Voigt says they wanted to develop an interactive program for the internet that would be free

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To start using the interactive form you start by supplying information about the traffic load that the pavement will have to carry.

Photo Credit: American Concrete Pavement Association

for anyone to use so they hired a software developer to help them.

The resulting program covers all different types of pavement; jointed plain concrete, continuously reinforced concrete, rollercompacted concrete, and composite systems. It can be used for roadways, overlays, parking lots, intermodal and industrial pavements, and even residential driveways. The program is intended for use by designers, engineers, contractors, departments of transportation, city departments of public works, and even private property owners.

HOW THE PROGRAM WORKS Pavement Designer has several features: • It is web-based and accessible from any computer or mobile device • Your project designs can be printed, saved, and shared • The program allows for various traffic inputs which allow for a wide range of vehicle weights and counts • The program is industry approved for all applications • It provides the ability to do side-by-side comparisons with alternative design programs • There is no software to install or updates or patches to track Eric Ferrebee, the Director of Technical Services for the ACPA, says that using the Google Chrome internet browser is the most troublefree one to use. So to start the process open Google and type in http://pavementdesigner.org to access the software. On the opening screen you will have the opportunity to log in if you have already registered, you can open an account if you wish, or you can click on “Start Designing” if you wish to avoid the log in process. The next screen requires that you select one of three categories; Parking areas,

Intermodal, or Streets. If you select “Streets” there are three more options; “Overlays,” a process of bonding a layer of concrete as thin as a couple inches to an existing asphalt or concrete roadway to increase the strength and longevity of the pavement—these overlays can be un-bonded too. You can also choose “New Composite.”

This option includes the utilization of stabilized base materials to help add increased slab life. But the third option, “Concrete” is probably what most people will use. It’s where conventional jointed city streets and local roads can be designed as well as roller-compacted concrete (RCC) and continuously reinforced concrete pavement. It’s where you can even design your residential driveway if you wish.

When you go into the next screen, the place where you input data, Ferrebee advises that you hover the mouse pointer over the help button on the top right side of the screen. A “Yes” or “No” box will appear. Click on the yes button and an information screen will appear whenever you hover over any of the input boxes.

The screen will provide additional information that will help you make decisions. You will need to repeat this process for each following screen.

FACTORS THAT INFLUENCE PAVEMENT DESIGN AND LIFE There are a number of factors that must be considered when

designing pavement. They include the following.

Traffic type. This includes cars versus trucks, the number of axles on a truck, and traffic volume. For instance, streets with a lot of truck traffic need better pavement and sub-grade preparation in order to provide a longer service life.

Design life. Planning for pavement with an increased life span is more expensive so designers must weigh this cost against replacement.

This has significance when considering concrete versus asphalt pavement too. Asphalt streets have an average life of 8-25 years while concrete pavement can have a useful service life of 20-40 years depending on how it is designed. If designers want equal performance between the two materials than they must specify a longer design life for asphalt Trucks per day. Trucks are much harder on pavement life than cars so the average number of trucks that travel over pavement daily, monthly, or yearly is important to know to pavement life. The range can average as little as three per day on a residential street to as much as 1,000 per day on a major arterial road.

Traffic growth rate. Pavement designs should include increased traffic use over time. Planners usually estimate between one to three percent per year.

Directional Distribution. Roads typically carry traffic in both directions.

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CONCRETE PAVING The second consideration is the sub-grade characteristics and the strength of the concrete.

Photo Credit: American Concrete Pavement Association

In most situations each side of a road carries 50 percent of the traffic but there are situations where more traffic is carried in one direction than the other and this can influence the design.

Lane Distribution. When there is more than one lane in one direction there can be more traffic in one lane than another. On a four lane road 90 percent of the truck traffic typically travels on the right hand lane.

Therefore the pavement design is usually based on the right lane.

Reliability. This helps account for the timing of pavement deterioration.

The cost of a project is related to the percent reliability that is specified.

One might say they want their pavement to be 100 percent reliable but that will significantly increase the price.

However, increasing the reliability will help reduce the likelihood of premature failure due to fatigue cracking or sub-grade instability. For freeways designers plan for reliability factors of 85 to 99 percent while for small local roads, parking areas and drives the factor is in the 50 to 80 percent range.

Slab Cracking. By the end of a pavements predicted service life what percent of its panels should be expected to have cracks in them?

Designers plan for this in their design knowing that some cracking will occur.

Plans for freeways for example will often predict cracks in as much as five percent of its panels by the end of its service life while residential roads are often plan to be in the 25 percent range. Planners make decisions about

the allowable number of cracked panels based on future expected maintenance costs for removing and replacing these panels.

SUB-GRADE The importance of sub-grade conditions is very important to the useful life of pavement—both concrete and asphalt. Ferrebee says that the stiffness of sub-grade materials is very important and this is usually referred to as the MRSG or resilient modulus of the sub-grade. It characterizes the sub-grade materials stiffness of the original soil, not the added compactable fill material. If you are unfamiliar with this you could use a CBR number for average low traffic street applications of approximately three to four percent. This will allow you to complete your pavement design form in a conservative manner.

• Recommended pavement thickness • Maximum joint spacing • Concrete (there is no recommended mix design) Strength requirement • Recommended Modulus or Elasticity - Flexural strength needed - Whether slab edge support is recommended - Whether macrofibers are recommended as an add to the concrete • The calculated MRSG value for sub-grade

FINAL THOUGHTS If you do a search on the internet for “pavement design” a large number of models, programs, and expert design services will come up. Voigt says their effort with PavementDesigner is to reduce the need for so many programs and to encourage a unified approach.

By making it an interactive internet program they hope many more people will be able to use and understand concrete pavements more easily. The ACPA will bring the team back together periodically to update the program.

Joe Nasvik is a writer and editor serving the concrete industry.

Contact him at jnasvik@ sbcglobal.net.

RESULTS The design summary provides you with the following information:

The summary screen provides the calculated slab thickness and joint spacing.

Photo Credit: American Concrete Pavement Association

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COVER STORY

By Tom Kuennen

Leveraging

TECHNOLOGY

A Kentucky concrete slipforming contractor has moved in a big way into curb, gutter and parapet construction by utilizing the advanced technology available to him.

F

ox Enterprises now constructs offset curb, gutter and parking lot "island" placements using an on-site guidance system. The system permits

automated placement of those items, including tight radii. And his fleet recently expanded to a larger slipform paver that can do offset curb-and-gutter paving, but also inset pavement slab paving.

"We want to be the best there is, and for that we need to buy the best technology available," says Ed Chenault, president, Fox Enterprises, Richmond, Ky. "Automated control of the paver is the future. My daughter some day will take over the reins of the company, and I want to have the next generation paving technology available to the next generation of management. I didn't buy the new slipform pavers for a five-year plan, I bought them for the long haul, the future of the company."

Using AutoPilot and in offset mode, Fox's SP 15i places curb and gutter in reconstructed parking lot of manufacturing plant.

Photo Credit: Wirtgen

To this end Fox bought two Wirtgen SP 15i slipform pavers with exclusive AutoPilot control technology in 2012 and 2014, and followed up with the next-sized model, the SP 25i in late 2016.

"The bottom line is that with this technology, on many projects we can install curb at a lower cost than before," Chenault says. "We've overcome the challenges that you get with any kind of new technology.

Now that we know the machines' capabilities, we are getting more

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Fox's new SP 25i places 12-ft. JPPC in inset mode on Ky. 80 in Hazard, Ky. Photo Credit: Wirtgen

efficient in their use. We're developing more and more opportunities to put them to work, and are pursuing other contractors that are using similar technologies, because they understand the advantage of competitive pricing with higher technology."

"The technology is really cool, and I use GPS daily," says Samantha Chenault, vice president, Fox Enterprises. "If we can advance the technology with the kind of work that we are doing and keep up with the times, this is the best way to do it."

Quite often Fox will serve as a subcontractor, which was the case when it was placing curbs, gutters and islands in a reconstructed parking lot for a major manufacturer outside Lexington, Ky. Chenault was working on a stormwater improvement and parking lot expansion there. "Using AutoPilot we installed a large number of trench drains, and were placing curb and gutter to tie into the trench drains," he said. "We have more success with the tight radius for curbs using AutoPilot than we do with stringline."

To use AutoPilot Fox has to select the right project and mate the AutoPilot to the project, Chenault says. "It depends on the general contractor we are following. The general has to buy in to the utilization of the

technology. We have found that most of our contractors, customers or clientele welcome this technology with open arms, because they understand the need for better technology."

Concrete pavement is hand finished in advance of tining.

Photo Credit: Wirtgen

WHAT IS AUTOPILOT? The Wirtgen AutoPilot is an innovative stringless control system for use with Wirtgen SP 15i and SP 25i concrete slipform pavers, which offers reduced costs of construction, faster setup times, and enhanced accuracy for paving projects.

AutoPilot is a user-friendly, cost-effective control system for

poured-in-place concrete profiles, such as curbs, safety barriers or slabs. AutoPilot is a GPS-based system that ensures highest precision and optimum efficiency in slipform paving, regardless of whether straight profiles or highly complex curved paths are being poured.

The proprietary Wirtgen AutoPilot control system gives construction companies a distinct competitive edge, as it bypasses the need to establish a digital terrain model.

That’s because programming is completed by using a rover pole to capture coordinates or by simply using the jobsite plans. This means a surveyor is not required.

Fox president Ed Chenault and vice president Samantha Chenault; the company is buying advanced technology as it plans for future generation ownership.

Photo Credit: Wirtgen

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COVER STORY Fox is able to utilize existing mold inventory, mating them to SP 15i.

Photo Credit: Wirtgen

an adapter plate to accommodate them, and we can continue to use our existing inventory."

The SP 15i and SP 25i also can be fed concrete mix either via auger or belt. "We're using the auger for concrete delivery as that's what we're accustomed to, and it works well," Chenault said.

INSET PAVING JPCC HIGHWAY

The AutoPilot system utilizes a computer integrated in the machine, as well as a control panel that allows intuitive operation. For course control, two machine-mounted GPS receivers communicate with an additional GPS reference station positioned on-site. For precise grade control, a laser, ultrasonic sensor or total station is used. The machine control software is a proprietary Wirtgen development.

At the manufacturing plant parking lot, the general had surveyed the project as if traditional stringline was going to be used. "AutoPilot permits us to come out, set up base station, and not know any kind of plans," Chenault says. "The traditional way is to create a digital terrain model of the job, put up a base station and do the work day-in and day-out. We come in, put the base station down, shoot the points and we don't have to know the coordinates."

Both SP 15i pavers were equipped for AutoPilot, but since then Fox sold the older paver and replaced it with the SP 25i. "We had two complete systems in two machines, that could be run simultaneously, even on the same job sites," he says. "The SP 15i

has advantages over its competitors.

The configuration of the three-track, all-track steering is very useful, with the front track posts maneuverable in different positions on-the-fly. The all-crawl steer -- and its ability to handle a big variation in sub-grade conditions -- was a big reason we acquired the machine."

For offset paving, while molds are available from Wirtgen, the SP 15i can accommodate existing molds from a contractor's inventory. Moreover, the molds can be mounted on either side of the paver.

"We've not yet had to utilize that technology, but we keep that in mind," Chenault said "We converted the molds we had; Wirtgen provided

In May 2017, Fox was using its new SP 25i not in offset mode to place curbs, gutters or parapet walls, but in inset mode to place a 12-ft. wide jointed portland cement concrete (JPCC) pavement for Ky. 80 in Hazard. The 7,000-cu.-yd.-project involved the complete removal of a 13-in. concrete pavement in which the sub-grade failed, replace 4 in. of undesirable sub-grade with new stone, and place 13-in.-thick JPCC pavement 12-ft. wide. This is done in 2,800-linear ft. pours. It's a Kentucky Class A, 16-bag mix that must meet 3,500 psi, but was testing out at over 5,000 psi. A retarder was added to give another 30 minutes workability per truck load.

On Ky. 80, the crews were averaging 550 to 700 yards per 12-hour shift with the SP 25i. "Slipform paving was what built our company, and the

Curbs, gutters and 'islands' placed by Fox' SP 15i using AutoPilot.

Photo Credit: Wirtgen

32 Concrete Contractor | April/May 2018 | www.forconstructionpros.com/concrete

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Superior vibration dampening design

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COVER STORY Inset paving on Ky. 80 using SP 25i required uphill climb Photo Credit: Wirtgen

SP 25i fits into our program," he said.

"It's like a 'Transformer', a multi-purpose slipform paver that will curb, and pave wide as well. It has the versatility of a smaller machine for curbs, gutters and parapets, but is capable of paving zero to 12 ft. wide."

Fox will use it for small repair paving that will let them do 300 to 400-ft. intersections in which failed asphalt is removed, and replaced with 24-hour fast-set concrete. The SP 25i's mobility is a plus there.

"The ease of moving the machine is outstanding and the set-up time is minimal," Chenault says.

Fox also has used the SP 25i with AutoPilot, having placed 10,000 ft. of DOT curb on asphalt base. The system was moved from his remaining SP 15i to the SP 25i with little effort.

"The versatility of the machine was a big selling point to me," Chenault says. "I can pour curb, big sidewalk flatwork, barrier wall, and pavement slabs 12-ft. wide and less.

We ordered all options; we order everything and have it installed, even if we remotely plan on using it.

It's a lot cheaper to do it that way,

Cushioned operating platform of SP 25i has high visibility and enhanced operator comfort.

Photo Credit: Wirtgen

and we never know if we will need it. We are a custom slipform paving subcontractor. We have to cater to our prime contractors, and as we never know what the next chapter will bring, we want to be prepared."

The next generation of management at Fox has been active with the company for several years, learning a wide variety of tasks.

Samantha Chenault was graduated

from Eastern Kentucky University in May 2015 with a degree in general business and a minor in construction management. She wears different hats at Fox, serving as project manager, in charge of safety programs, and overseeing marketing projects.

"I know that the Wirtgen pavers are the future of slipforming, and future generations of ownership of the company that I started will be utilizing this technology to take us to the next level," Chenault says.

Fox's distributor is Brandeis Machinery & Supply, Inc., out of Lexington, where Chenault and operations manager Chris Bennington work with sales rep Lyle Dalton. "We work through the dealer with many technical issues, but Wirtgen America in Nashville has stayed available as much as we need them, with Nick Maupin and his staff aiding us," he says.

34 Concrete Contractor | April/May 2018 | www.forconstructionpros.com/concrete

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The best adhesive performs in the worst conditions.

The next generation of Simpson Strong-Tie ® epoxy adhesive is more reliable and versatile. With a code report pending, the high-strength SET-3G™ anchoring adhesive can be installed in extreme concrete temperatures (from 40°F to 100°F ) as well as in dry or water-filled holes in concrete to provide the strength and performance needed for adhesive anchor installations on your projects.

Rely on SET-3G epoxy for your next project. To learn more and watch a video, visit go.strongtie.com/set3g or call us at (800) 999-5099.

ForConstructionPros.com/10074628

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© 2018

Simpson Strong-Tie Company Inc. SET3G17-C

4/20/18 2:07 PM

PRODUCT FOCUS

By Tripp Farrell

Concrete pump attachments are a great alternative to concrete boom trucks because they usually are used with a two-inch delivery line. The smaller line typically reduces material velocity and the risk of blowouts.

Photo Credit: Blastcrete Equipment Company

The Right FLOW

I

When a concrete pump attachment is ideal for filling ICFs. nsulated concrete forms provide many benefits to end users — low energy costs, greater longevity than more common materials and durability — giving owners an excellent return on investment.

But how can contractors installing ICFs ensure they, too, get the best ROI along with high-quality results, convenience and ease of use during the concrete pumping phase of each project?

PREVENTING THE DREADED BLOWOUT Whether you’re installing a pool surround, or walls for a single-family home, the concrete boom truck certainly has its place in the ICF world.

But there is one major challenge that plagues contractors — blowouts,

when a break in the formwork allows concrete to escape.

The steel boom sections and rubber boom extension used as the delivery line for a boom truck for an ICF filling application will typically never fit inside an ICF because it is larger than the form opening. Also, in many cases, rebar is used to help fortify the forms. As a result, the boom and rubber hose must be held above the forms and the rubber hose is moved around to guide the grout into the forms. The boom pump must pump the material vertically to lift the grout in position to fill the form. Once the material changes directions from up to down, gravity increases the material’s velocity as it is discharged from the rubber delivery line into the form.

This increased velocity combined with the weight of the grout can put

significant stress on the ICF, particularly the lower forms stacked on top of the foundation. In some cases, the forms must be filled every four courses of forms, which requires more time on the job for the boom truck and more time to fill the forms.

Contractors facing this scenario have another option, however, that can improve quality, lower costs and speed up the process; a concrete pump attachment. This attaches to a skid steer or compact track loader and uses the machine’s hydraulics to deliver 0- to 25-yard-per-hour outputs and pump material as far as 250 feet horizontally and 100 feet vertically.

Concrete pump attachments are a great alternative to concrete boom trucks because they usually are used with a two-inch delivery line. The smaller line typically reduces material

36 Concrete Contractor | April/May 2018 | www.forconstructionpros.com/concrete

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PRODUCT FOCUS

Top: Concrete pump attachments cost roughly 5 to 30 percent of the price of their larger counterparts.

Left: A concrete pump attachment attaches to a skid steer or compact track loader and uses the machine’s hydraulics.

Photo Credit: Blastcrete Equipment Company

velocity and also minimizes trapped air, for more uniform results.

Contractors can use pump attachments with a one and a half-inch delivery line and a fine grout mix to minimize material velocity even more.

In addition, these smaller pumps take up minimal space on the jobsite; some units are as small as four-by-six feet. The attachments are equipped with squeeze pumps, which contractors can run in reverse, allowing operators to safely remove a plugged line without the risk of high pressure building in the delivery line.

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The concrete boom truck becomes a familiar sight that signals the next phase of the project is on the horizon. But it often doesn’t come soon enough. Once ICF installation crews place the call to the concrete provider they are at the mercy of that company’s schedule, and it could be several days until the crews can pour. It’s not an ideal situation because, like every contractor knows, time is money.

They can, however, achieve the convenience and reliability of having concrete pours where and when they want it with their own trailer and pump or pumping truck. These options comes with a hefty price tag — $60,000 for a trailer pump unit to as much as $350,000 for a pump truck — so for contractors doing the occasional ICF project, a full return on investment will be many years down the road.

This is another scenario where a concrete pump attachment is ideal. These machines cost a fraction of their larger counterparts — roughly 5 to 30 percent of the price — and since most contractors already have a loader to operate the pumps, the investment is relatively minimal.

THE RIGHT PRICE In addition to convenience, another reason many contractors choose concrete pump attachments rather than boom trucks for filling ICFs is to eliminate the costs associated with hiring a pumping contractor. Costs can run anywhere from $750 to $1,500 or more per pour. This is like renting an apartment rather than purchasing a home — it’s nice to have a place to stay where someone else mows the lawn, shovels the snow and makes the repairs, but you’ll always have to pay

ForConstructionPros.com/10076569

38 Concrete Contractor | April/May 2018 | www.forconstructionpros.com/concrete

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someone in order to live there and it will never be yours.

Instead of continuing to pay a concrete pumping provider, contractors can purchase a pump attachment and have it paid for in as few as 12 jobs.

Contractors can also use the pumps for block fill, grouting, cellular concrete and wet shotcrete applications, enhancing ROI even further.

KEEPING IT ALL IN CHECK While owning a concrete pump means being responsible for maintenance and repairs, keep in mind attachment models are fairly easy and cost effective to keep in good working order, and require less upkeep than traditional concrete pumps. Many trucks feature a piston pump, which has multiple wear parts, including cup seals, poly packs, wear plates and wear rings. This means more potential for downtime and more time crew members need to

spend maintaining or replacing these parts. Concrete pump attachments, on the other hand, are equipped with squeeze pumps, which have just one wear part, the rubber pumping tube, which makes them the most economical concrete pump. In fact, maintenance costs are typically less than $1 per cubic yard of pumped material.

Operators can easily clean squeeze pumps with a round sponge ball since no concrete comes in contact with the pump’s moving parts.

Simply pump the concrete out of the hopper and suck the sponge ball into the pump’s inlet pipe. Then, flood the hopper with clean water. The sponge serves as a dam between the concrete being pumped and the cleanup water. Engage the pump in forward so the water pushes the ball through the pump and delivery system for a quick and simple cleanup.

To ensure maximum longevity of the pumping tube and minimize

maintenance costs, closely monitor the condition of the pumping tube.

After noticeable wear, remove the tube, flip it 180 degrees and install it back in the pump. For optimal results when pumping materials for ICF, the mix should include 3/8-inch aggregate concrete that has a fiveinch-plus slump pumped through a one and a half-, two- or two and a half-inch delivery hose.

SMALLER MAY BE BETTER Whether contractors are just starting out with ICFs or are ready to fully submerge themselves in this type of business, the right concrete pump will go a long way in ensuring success.

Ed. Note: Tripp Farrell joined Blastcrete Equipment LLC in 2000 and serves as president. He can be reached at tripp@blastcrete.com or 800-235-4867.

ForConstructionPros.com/20993277

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PRODUCT FOCUS

By Greg Udelhofen

B18 Mini Concrete Placer With a gas and electric-powered boom placement, this latest technology adds vertical reach to a boom pump operation and reduces labor on expansive deck placements.

C

oncrete Pump Supply introduced the B18 Mini Placer at World of Concrete earlier this year after field testing the concept throughout 2017. Reports from the field along with contractor interest at the show has generated numerous unit sales to concrete pumping services and concrete contractors.

According to Max Kaska, marketing specialist for CPS, the machines are being leveraged to their full potential on a variety of concrete pumping projects and they’re earning their keep daily.

“We started selling the machines last year with their ability to fill a gap in high boom pump applications,” Kaska says.

Pioneer Concrete Pumping, parent company of CPS, initially put two of the units in its equipment fleet, one in Atlanta and one Dallas, to see how they could compliment a pumping operation.

According to Taylor Williams, CPS equipment specialist, typical 10-12 story concrete projects required a very large concrete pumper or a tower pump setup to supply the upper levels.

But with the B18 Mini Placer, concrete pumpers and the concrete contractors

working on a project gain an extra 60 feet of vertical reach, which allows for a smaller pump truck to be used and in many cases eliminates the need for a tower pump setup.

“If you’re pouring a slab or working on a three-story building, you may not have room (on the jobsite) to set up a large boom,” Williams explains. “And if you can’t use a large boom pumper to reach the entire project, then you have to hook up a 100-meter hose to the pumper you can get on the site. But the B18 Mini Place allows you to extend the reach of a smaller pump truck.”

The other advantage, according to Williams, is the fact that a single operator can use a wireless control device to move the boom wherever the concrete crew needs material. It eliminates the need to have a “hose” man guide the placement hose at the end of the boom.

“Manual deck placers have been used for a long time in warehouse project for slab and wall projects, but With wireless control, the B18 Mini Placer provides easy placement of material on deck pours using a three-section boom that can reach 60 feet.

Photo Credit: Concrete Pump Supply

The B18 Mini Placer provides 60 feet of horizontal reach, which provides improved deck placement over a conventional manual deck placer.

Photo Credit: Concrete Pump Supply

they rely on members of the concrete crew to physically pull and push the boom to distribute material where they need it,” Williams says.

Supplying material to a manual deck placer in a warehouse environment is often another challenge with limited height access for boom trucks supplying the material. The B18 Mini Placer with its three-section boom that can reach 60 feet horizontally on a slab pour only requires 20 feet of clearance to operate in a warehouse environment.

“The feedback we’ve received so far is that customers like them because they can often use them on a project without a placing boom,” Williams says. “And, the with a crane on a project, the B18 can be quickly moved from one level to another, or out of the way all together.

This approach is a lot simpler and convenient for projects that need a little extra reach.”

40 Concrete Contractor | April/May 2018 | www.forconstructionpros.com/concrete

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Without a

Honda Engine, your crew sees this:

Hard-working crews know that there’s a difference between equipment backed by a Honda engine and those that won’t stand up to the rigors of a demanding jobsite. From floats to compactors, compressors, pumps, and generators, real pros choose durable, fuel-efficient, and easy starting Honda GX Series engines on their equipment. Not to mention, the standard 3-Year Warranty* that backs up our legendary reliability.

Learn more at engines.honda.com ForConstructionPros.com/10071940 *Warranty applies to all Honda GX Series engines, 100cc or larger purchased at retail or put into rental service since January 1, 2009. Warranty excludes Honda GXV140 and GXV160 models. See full warranty details at engines.honda.com. For optimum performance and safety, please read the owner’s manual before operating your Honda Power Equipment. ©2018 American Honda Motor Co., Inc.

CONC0418_40-41_ProdFocConcPumpSup.indd 41

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SPECIFICATION GUIDE: SCREEDS

Screeds

A compilation of technical information when choosing your next screed.

Hand and Spin Screeds

1 The EZ Screed Complete Tool Set

The EZ Screed Tool is designed for walks, driveways and slabs of various sizes. The EZ Screed Tool used in an upright position is faster and more effective in the leveling of concrete, resulting in a more precise, professional finish to your concrete job while minimizing stress on back and knees as in the traditional method of screeding. Features: Powder coated handle with stand, quality aluminum blades (3 to 7 lbs. each), lightweight and durable.

ForConstructionPros.com/10080016 Model

Weight (lbs.)

Blade Lengths

Handles

EZ Screed Complete Set

5 lbs. per handle, 1 lb. per foot for aluminum screeds

3’, 4’, 5’ and 7’ aluminum screeds

Powder coated steel handle

Model

Weight (lbs.)

Blade Lengths

Handles

5 lbs. per handle

Will attach to any 10’ to 20’ aluminum or wood screed

Powder coated steel handles

EZ Screed Pro Two

2 EZYSCREED with Inbuilt Level

EZYSCREED is a manual screed, featuring an inbuilt level and reversible capabilities. It is lightweight with a designed screeding edge and reinforcements, making it the most useful, economical and strongest screed on the market. Available in lengths from 0.9 m / 2’11” to 3.6 m / 11’9”.

ForConstructionPros.com/12003790 Model

Weight (lbs.)

Blade Lengths

Handles

EZYSCREED

Multiple weights

Multiple

1

3 Spin Screed Rugged Screed

The Rugged Spin Screed • Weighs less than 100 lbs with 22’ pipe and screed • Pipe lengths up to 22’ • T-handles The electric powered Rugged Spin Screed is lightweight, quiet; simple to clean, and make rapid length changes. It works on both flat surfaces and steep slopes. The Spin Screed can be used with concrete having a 3” slump and still produce a high quality durable surface. With the Spin Screed, you’ll produce flatter concrete surfaces with less work and time.

ForConstructionPros.com/10084911 Model

Weight (lbs.)

Blade Lengths

Handles

Rugged Spin Screed

Less than 100 lbs. with 22’ pipe

Pipe lengths up to 22’

T-handles

42 Concrete Contractor | April/May 2018 | www.forconstructionpros.com/concrete

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CONC0418_42-49_SpecGuides.indd 43

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SPECIFICATION GUIDE: SCREEDS

Wet Screeds

1 MBW SCREEDEMON

The MBW ScreeDemon employs a simple, durable, low cost rubber isolator to drive the eccentric.

The back-to-back triangular construction of the ScreeDemon bar is extremely rigid and minimizes variability in the transmission of vibration. The ScreeDemon simply clamps to the specially designed bar. The ScreeDemon’s patented mount retention method enables use of low durometer isolators without loss of operator control. Hand/arm vibration is 50 to 90% lower than competitive screeds.

ForConstructionPros.com/10083973 Model

Weight (lbs.)

Engine/Motor Manufacturer

Engine/Motor (horsepower)

Displacement

Blade Lengths

Handles

Tank Capacity

SCREEDEMON WS500H

29 lbs.

Honda GX35

1.5 hp

1.9 in3

4’ up to 24’

Low Vibe Handle

0.17 gal.

2 The Libby Concrete Spreader and Leveler from IGOE International The Libby Concrete spreader and leveler, a unique, one man operated machine capable of leveling a truck load of concrete effortlessly in less than 10 minutes. Because of its patented horizontal vibration, this machine can be pushed forward as well as pulled backwards without sinking and gets a very good finish with minimal ‘fat ‘pulled to the surface.” Unit includes 5 ft. blade.

ForConstructionPros.com/20999428 Model

Weight (lbs.)

Engine/Motor Manufacturer

Engine/Motor (horsepower)

Displacement

Blade Lengths

Handles

Tank Capacity

Libby

30 lbs.

Honda

1.1 hp

N/A

5’, 8’ and 10’

1

600 mL

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44 Concrete Contractor | April/May 2018 | www.forconstructionpros.com/concrete

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Wet Screeds Continued

3 Somero Copperhead XD 3.0

This self-propelled 4th generation walk-behind Laser Screed® model automatically cuts concrete to finish grade, screeds it flat, vibrates it smooth, in a single pass. Superior productivity, increases labor savings, levelness, and return on investment. Applications: Slab-on-Grade, Slab-on-Deck, chaired rebar or mesh, in-floor heat, freezer slabs and ice rinks, including many NHL rinks. Winner of numerous Golden Trowel® awards.

ForConstructionPros.com/11151571 Model

Weight (lbs.)

Engine/Motor Manufacturer

Engine/Motor (horsepower)

Displacement

Blade Lengths

Handles

Tank Capacity

Copperhead XD 3.0

850 lbs.

Honda 4-Stroke; Kohler Diesel Optional

13 hp

389 cm4

8’ or 10’

Adjustable

3.5 gal.

Model

Weight (lbs.)

Engine/Motor Manufacturer

Engine/Motor (horsepower)

Displacement

Blade Lengths

Handles

Tank Capacity

Mini Screed C

470 lbs.

Honda 4-Stroke

8.5 hp

270 cm4

83.25”

Fixed

1.4 gal.

4 Multivibe MVPR100H

Joe Lindley, owner of Jlin Corp. DBA Multivibe has an impressive background in the art of working with concrete.

He had 20 years of experience as a contractor prior to his 26 years of design/building equipment for concrete placement. Listening to customers is why Multivibe has the largest selection. All of the company’s products are designed and built with the Multivibe quality on focus. ForConstructionPros.com/ 12189542 Model

Weight (lbs.)

Engine/Motor Manufacturer

Engine/Motor (horsepower)

Displacement

Blade Lengths

Handles

Tank Capacity

Multivibe MVPR100H

30

Honda

1.5 hp

35 cc

Up to 24’

Option: Single or Two

.6 qts.

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SPECIFICATION GUIDE: SCREEDS Wet Screeds Continued

Pneumatic LBG 800 Bull Float and 5 Chicago LBG 1200 Screeds Chicago Pneumatic offers two new walk-behind screeds—the LBG 800 bull float screed and LBG 1200 hand-held screed—that are light and easy to handle. They are designed to provide a consistent, even surface without any guide or supporting tube. Equipped with a reliable Honda engine, the screed features a rubber element to reduce H/A vibrations. For quick adjustments, the ignition switch and throttle control are within easy reach for the operator.

ForConstructionPros.com/12057796 Model

Weight (lbs.)

Engine/Motor Manufacturer

Engine/Motor (horsepower)

Displacement

Blade Lengths

Handles

Tank Capacity

CP LBG 800 Bull Float Screed

40 lbs.

Honda GX25 Mini 4-Stroke Engine

1.1 hp

25 cm4

84”

Three snap-lock sections, extending up to 180 in.

.61 U.S. qt. / (0.58 Liters)

Model

Engine/Motor Manufacturer

Engine/Motor (horsepower)

Displacement

Blade Lengths

Handles

Tank Capacity

Honda GX35 4-Stroke Engine

1.3 hp

35.8 cm3

48”, 72”, 96”, 120”, 144”, 168”, 192”

Two adjustable handles

.67 U.S. qt./ (.63 Liters)

Weight (lbs.)

CP LBG 1200 Hand- 6 lbs., up to 26 lbs. (six Held Screed models available)

6 MQ Whiteman DuoScreed

Multiquip’s DuoScreed utilizes a unique blade profile that enables one person to strikeoff concrete floors. The screed’s vibratory action embeds aggregate and reduces air voids, producing a strong, dense slab, while eliminating the strenuous time-consuming labor of manual screeding. Unlike competitive designs (which require different blades for each application) the DuoScreed uses a unique reversing blade that allows for the usage of either the curved form to form edge or the wet-screeding edge.

ForConstructionPros.com/10079949 Model

Weight (lbs.)

Engine/Motor Manufacturer

Engine/Motor (horsepower)

Displacement

Blade Lengths

Handles

Tank Capacity

DuoScreed (DSGPULW)

32 lbs.

Honda GX-35SAT

1.3 hp

35 cc

6’, 8’, 10’, 12’, 14’, 16’

Adjustable

.67 U.S. qt.

Neuson Wet Screed Now Available 7 Wacker with Magnesium Boards Wacker Neuson’s wet screed is now available with a full line of magnesium boards. Magnesium is a strong, lightweight metal that will reduce the weight of the boards by over 25 percent compared to aluminum boards. The full line of magnesium boards is available in seven different lengths: 6’, 8’, 10’, 12’, 14’, 16’ and a 2-meter option. All the magnesium boards have a 4.9” width and range in weight from 9.8 lbs. to 25 lbs.. The boards are easily connected to the wet screed system.

ForConstructionPros.com/12058112

Model

Weight (lbs.)

Engine/Motor Manufacturer

Engine/Motor (horsepower)

Displacement

Blade Lengths

Handles

Tank Capacity

P35A Wet Screed

34.2 lbs.

Honda GX35

1.6 hp

2.2 in³

4’ to 16’

Twin handle

0.7 qts,

46 Concrete Contractor | April/May 2018 | www.forconstructionpros.com/concrete

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Power Screeds

1 Somero S22 EZ Laser Screed

®

The Industry’s Best! Proof - for 2017 the S-22 won 3 Golden Trowel Awards and set a world record for the levelest floors in the world! Also industry leading production rates, unsurpassed power, features, and maneuverability.

New for 2018: EZ Clean Head, compartment layout, convenience items, improved ergonomics. With so many exclusives, the S-22EZ options platform allows you to build the machine the way you want to meet your needs.

ForConstructionPros.com/20999415

Model

Height (inches)

S22 EZ

96”

Model

Height (inches)

Width (inches)

Machine: 7’ 2” Head width: 14’ 7” or 16’ 6” Vibrator width: 12’ or 14’

Width (inches)

81””

Head width: 10’ 6” or 12’ 6” Vibrator width: 8’ or 10’

Vibrator Coverage

14,500 lbs.

240 or 280 sq. ft.

Engine/Motor (Mfg & Horsepower

# of Drive Wheels

Machine Zero Turn Drive Capable

Fuel Type

N/A

Diesel

Cummins Turbo, Tier 4 drive wheels 4 Final Steering: 2/4/Crab 65 hp

Weight (lbs.)

Vibrator Coverage

Engine/Motor (Mfg & Horsepower

# of Drive Wheels

Machine Zero Turn Drive Capable

Fuel Type

9,300 lbs.

160 or 200 sq. ft.

Kubota Turbo, Tier 4 Final 44.3 hp

4 drive wheels Steering: 2/4/Crab

N/A

Diesel

Machine: 6’ 6 (78”) S-15R

Weight (lbs.)

ECOQUICK GEL

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www.forconstructionpros.com/concrete | April/May 2018 | Concrete Contractor 47

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SPECIFICATION GUIDE: SCREEDS Power Screeds Continued

2 Ligchine International ScreedSaver BOSS 240

Ligchine International’s newest screed is the ScreedSaver MAX PRO. The MAX PRO combines the classic durability and accuracy of the ScreedSaver MAX with the technology advancements and design from the top-of-theline ScreedSaver BOSS 240. The MAX PRO comes equipped with a touchscreen diagnostic display, zero turn drive system for unrivaled machine navigation, and concrete additive screed head spray system.

Boom extension of 16’ (4.9m) with a 12’6” (3.8m) screed head results in screed rates up to 7,000 sq.ft./hour (650m2) ForConstructionPros.com/12321849

Model

Height (inches)

Width (inches)

Weight (lbs.)

Boom Coverage (sq. ft. per pass)

Engine/Motor (Mfg & Horsepower

# of Drive Wheels

Machine zero turn drive capable

Fuel Type

ScreedSaver MAX PRO

54”

76”

4,870 lbs.

200

Kubota 24.8 hp (Tier 4 Final)

2

Yes

Diesel

Model

Height (inches)

Width (inches)

Weight (lbs.)

Boom Coverage (sq. ft. per pass)

Engine/Motor (Mfg & Horsepower

# of Drive Wheels

Machine zero turn drive capable

Fuel Type

ScreedSaver II

54”

54”

2,840 lbs.

130

Honda 20 hp

2

Yes

Gasoline

3 Hydra-Screed from Curb Roller Manufacturing • • • • •

Hydraulically driven - 3-5 gpm at 2,250 psi required Two way (reversible) variable speed control Screed up to 28 ft.

Single pin allows for change of direction Handles pivot for desired operators position

ForConstructionPros.com/10079564 Model

Height (inches)

Width (inches)

Weight (lbs.)

Boom Coverage

Engine/Motor (Mfg & Horsepower

# of Drive Wheels

Machine Zero Turn Drive Capable

Fuel Type

Hydra-Screed

48”

Up to 30’

N/A

N/A

Hydraulically driven

N/A

N/A

N/A

Truss Screeds

1 Allen SE12 Steel Truss Engine Driven Screed

The Allen Razorback Truss Screed is the contractor’s preferred brand when high tolerance FL Numbers are specified on concrete floors and pavements. For more than 40 years, Allen Truss Screeds have set the industry’s standard for precision levelness, rigidity and durability. Allen Engineering has a full line of truss screed models and accessories. Allen’s commitment to quality and customer satisfaction will insure that your truss screed will provide years of trouble-free operation.

ForConstructionPros.com/12057760 Model

Height (inches)

Max Width (ft.)

Max Weight (lbs.)

Engine/Motor (Mfg & Horsepower

Tank Capacity

Allen SE12 Steel Truss Engine Driven Screed

30.5”

Up to 65’

N/A

Honda GX 340

N/A

2 MBW Blitzscreed

The MBW Blitzscreed is a lightweight aluminum screed designed for flat, inverted or applications up to 65’. Available section lengths include 8’, 4” 4’,4”; and 2’, 4”. The diagonal truss/A-frame system offers structural strength while the flex-couplings and turnbuckle design makes for quick assembly and disassembly. Blind nuts help keep concrete off threads and eases disassembly/assembly. Hydraulic winches are also available.

ForConstructionPros.com/12057874 Model

Height (inches)

Width (inches)

Weight (lbs.)

Engine/Motor (Mfg & Horsepower)

Tank Capacity

MVS Mechanical Blitzscreed

16”

15”

8.3 lbs./ft.

Up to Honda GX270 (8.5 hp)

5.6 qts.

48 Concrete Contractor | April/May 2018 | www.forconstructionpros.com/concrete

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CONCRETE TECHNICAL

By Lisa Wells

Safe Alternatives to

MURIATIC ACID By nature a tough material, concrete’s strength is … well, its strength. But when it comes to maintaining and cleaning your tools that strength can be a problem.

What a transformation! The organic acid based concrete remover was sprayed away with a power washer and this power buggy is looking good as new.

R

emoving concrete buildup and splatter is a real chore.

You can use a sandblaster.

You can chip away at it with a hammer. Many turn to chemicals like muriatic acid.

THE TRUTH ABOUT MINERAL ACIDS Sure, muriatic acid (or hydrochloric acid) can effectively clean cement products like concrete and mortar but using it also requires following a long list of safety precautions. First of all, you need to protect your body. This means

Photo Credit: Nox-Crete

thick rubber gloves, safety goggles, long sleeves and pants (preferably of chemical-resistant PVC), an apron, and a respirator. Secondly, you need to protect your lungs from the toxic fumes (the more concentrated the acid, the stronger its fumes) which can damage lung tissue, and in extreme cases, cause death. To avoid lung damage, ensure adequate ventilation and wear a personal respirator approved by the National Institute for Occupational Safety and Health (NIOSH). Finally, work slowly and carefully with this product to avoid accidents and always keep it away from children.

These precautions This power buggy is tend to make covered in muriatic acid concrete sound like a pretty buildup and splatter and dangerous chemical; is typical of that’s because it is. equipment In addition to the used in the concrete health and safety construction concerns, muriatic industry. acid is extremely Photo Credit: Nox-Crete corrosive to all metals to include steel, aluminum, magnesium, copper, zinc and all galvanized surfaces.

Additionally, muriatic acid will cause the immediate formation of flash rust on all exposed steel surfaces.

Electrical connections and contacts can quickly corrode when exposed to even dilute concentrations of muriatic acid. Frequent use and exposure to muriatic acid naturally increases the health and safety risks to you and your team.

50 Concrete Contractor | April/May 2018 | www.forconstructionpros.com/concrete

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CONCRETE TECHNICAL What a lot of folks don’t know is that there are alternatives to muriatic acid that are actually more effective, and also safer and easier to use.

THE TRUTH ABOUT ORGANIC ACIDS Organic concrete removers use natural organic acids derived from

sugar beets to dissolve caked-on concrete quickly and easily. The health and safety advantages of using organic acid based cleaners vs. muriatic acid to clean your tools and equipment are undeniable. Organic acids have no odor or fumes so respirators aren’t needed. They won’t burn your lungs or your skin, and

ENGINEERED CHEMICALS FOR POLISHED CONCRETE PROFESSIONALS

Manufactured by SOLOMON COLORS, INC.

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won’t cause serious injury or death.

The absence of any mineral acid means you have less to worry about when it comes to protecting yourself compared to using muriatic acid.

However, when using any acids it’s never a bad idea to wear gloves and protective eye wear.

Environmental friendliness is another reason to opt for an organic acid based concrete remover.

Because organic acid based cleaners are biodegradable, there are no negative effects on the environment, even if the acid seeps into the soil.

Muriatic acid, on the other hand, is non-biodegradable. It may evaporate from the surface, but a lot of it will remain in the soil where it’s harmful to wildlife and water sources.

There are many other advantages to using organic acid based concrete removers. One is that they’re non-corrosive and won’t damage your forms, tools, screeds, pumps, trucks and equipment. They’re gentle and effective and will save your equipment from the corrosion and rust brought on by other attempts at concrete removal. Just think what sandblasting, chiseling, and harsh acid does to your tools and equipment over time … costly damage that can be avoided.

Organic acid based concrete removers typically contain a powerful detergent that cuts through grease, oil, dirt, and exhaust soot so they’ll

ForConstructionPros.com/10074663

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A hand pump foamer was used to apply the organic acid based concrete remover to all surfaces of the power buggy, including the motor and electrical components.

Photo Credit: Nox-Crete

mineral acid based chemicals to a gentler, safer, environmentally friendly organic acid based product is easy when there are great products available. Once you see how

effectively you can clean your tools and equipment with an organic acid based product, you’ll never want to mess with harsh mineral acids again.

Ed. Note: Lisa Wells is the Marketing Communications Specialist with Nox-Crete. She can be reached at LWells@nox-crete.com.

W. R. MEADOWS Joint Sealing Solutions

be suitable for a wide range of applications. They can be applied using a foamer which creates a thick foam that clings to vertical surfaces allowing for the fast removal of concrete buildup and splatter.

POURTHANE

THINGS TO LOOK FOR IN AN ORGANIC ACID BASED CONCRETE REMOVER • Contains no mineral acids • Foam formula that adheres to vertical surfaces as well as horizontal • Safe for use on all surfaces to include aluminum, steel, magnesium, plastic, rubber and glass • PH-sensitive dye that turns transparent to indicate it is done working • Ready-to-use formula for easy application • Meets all federal and state VOC requirements There are a few things to keep in mind if you’re considering an organic acid based concrete remover. These products generally perform optimally at temperatures above 50 degrees Fahrenheit. To avoid rapid evaporation, it’s best to apply them when the sun is at a low angle so plan to use them in the morning or evening rather than mid-day. Organic acid based products can cut through thick layers of dried concrete but multiple applications might be required. This can be true for any product including muriatic acid.

Making the switch from harsh

POURTHANE low VOC, single component, contractor friendly polyurethane joint sealants are formulated in both non­sag (NS) and self­leveling (SL) consistencies.

POURTHANE NS is an excellent choice for non­sag, polyurethane sealant projects where ease of tooling and superior adhesion are desired properties.

POURTHANE SL is a self­leveling, non­bubbling polyurethane sealant specifically developed to be used as a multi­purpose horizontal joint sealant. This unique single component can be applied to green concrete.

For a solution based on your needs, visit wrmeadows.com/pourthane or call 1­800­342­5976. © W. R. MEADOWS, INC. 2018

ForConstructionPros.com/10075161

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Polishable Overlays The decorative concrete world’s real-life philosophers stone.

By C.T. “Chip” Marshall

I

n legend the philosopher’s stone was an alchemical substance that turned base metals into gold. The building owners of today are in search of a remedy akin to the philosopher’s stone of yore, a remedy that can make a worn concrete floor shimmer like gold. Modern concrete polishable overlays just may be the solution.

Concrete floors have dominated buildings throughout the US and the world at large for well over a century, and those concrete floors have been used and abused for decades.

They’ve been covered with VCT and ceramic tile and LVT and linoleum.

They’ve been covered with carpet and coated with epoxies. They’ve been soaked and sealed with oils and urethanes and silanes and silicas. These floors have been continuously re-done and re-purposed, but those concrete floors aren’t ageless… they’re aging.

As more and more of the powers that be recognize the benefits and long-term cost savings associated with polished concrete, those same powers that be have demanded that philosopher’s stone from the decorative concrete industry. The industry has responded and polishable concrete overlays have leapt onto the scene.

WHAT IS A POLISHABLE CONCRETE OVERLAY Concrete overlays are not new.

In fact, floor re-surfacers of varying types and applications have been

around since the early 20 th century.

In the early 1930’s, a British chemist, John Crossfield, was the first to patent a concrete overlay consisting of both Portland cement as well as latex and naturally occurring rubber compounds. Crossfield’s invention wasn’t intended for floor re-surfacing but for ship deck resurfacing on an aging British fleet. Crossfield’s company, Surfacing Products, and his re-surfacing patents languished in obscurity until a group of investors purchased the entity and Crossfield Products Corporation was born.

Crossfield Products Corporation is generally considered the godfather in the world of cementitious overlays and still exists today. As the company continued to grow throughout the 20th century, they engineered a Portland based overlay that, combined with the latest and greatest epoxy and polymer resin technology, could be used to resurface concrete floors and withstand heavy duty use. By the 1970’s Crossfield Products purchased the company Miraco and transformed Miraco’s Miracote into an all new line of products and overlays for the

Industrial Caulk and Seal takes the time during the preparation phase to remove, repair, or patch damaged surfaces prior to application. Following the mechanical preparation of the substrate, that substrate must be primed to ensure adequate adhesion of the final overlay.

Photo Credit: Industrial Caulk and Seal

growing concrete overlay market.

Miracote exists today as a worldwide leader in cementitious overlayments.

While Crossfield may have perfected the concrete overlay, a polishable concrete overlay was still decades away. To be able to polish that overlay to the high sheen that is associated with polished concrete, new technology and products were required.

THE EVOLUTION OF POLISHABLE CONCRETE OVERLAY PRODUCTS Concrete overlay products have evolved rapidly throughout the last decade, and among the manufacturers on the cutting edge of this fledgling industry is SpecChem LLC. Though relatively

54 Concrete Contractor | April/May 2018 | www.forconstructionpros.com/concrete

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TAKE THE LEAD IN THE BATTLE AGAINST DUST AND SLURRY OUR MISSION IS TO CONTINUALLY PROVIDE THE BEST SOLUTIONS FOR YOUR BUSINESS. Keeping you and the surrounding area safer, all while maintaining or increasing productivity is our goal. That is why we have fully integrated our class-leading equipment to handle dust and slurry. WIth our high-performing systems of dust extractors, pre-separators, wet slurry vacuums and air scrubbers, you can be sure we have a solution to help you work safer and towards compliance of rules and regulations.

Demonstrations are available nationwide.

800-288-5040

WWW.HUSQVARNACP.COM/US/CONTACT-US facebook.com/husqvarnaconstruction youtube.com/husqvarnaCP HusqvarnaCP_Americas Copyright © 2018 Husqvarna AB (publ.). All rights reserved. Husqvarna is a registered trademark of Husqvarna AB (publ.).

ForConstructionPros.com/10073334

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new to the decorative concrete world, SpecChem has deep roots in construction chemicals and has set the industry standard in product innovation. SpecChem’s brand new SpecLevel PCT is no exception.

SpecLevel PCT is a flowable cement based self-leveling topping that can be polished as early as 24 hours after initial application. SpecChem’s SpecLevel PCT can be used in a variety of applications, wet or dry… indoor or outdoor, and accepts both integral color and concrete dyes or stains. Keith Fleming and Mike LeMark with SpecChem are excited by the prospects offered with SpecLevel PCT and feel that SpecLevel PCT will rapidly become the benchmark in polishable concrete overlay products.

THE PREPARATION PROCESS Industrial Caulk and Seal has been a leading contractor in the polishable overlay world since the very beginning. Victor Botley, Chief

Operating Officer with Industrial Caulk and Seal, shared insight into the polishable overlay world and the best practices in providing a great end product. “Surface preparation is the key to a finished floor,” states Botley, “if your floor has been inadequately prepped or if the epoxy base coat was marginalized the final floor will never meet expectations.”

Botley’s conclusions are substantiated throughout the polished concrete

BLAST-OFF

GREEN ENGINEERED TM

Most polishable overlays have been engineered to mitigate down time on a floor surface and are able to be polished 24 hours after placement.

Photo Credit: Industrial Caulk and Seal

industry. All reputable polished concrete overlays require surface preparation as a critical component to the floor system. The prepared floor must meet the required concrete surface profile (CSP) noted in the products technical data sheet. Requirements range from a CSP 3-5, and the installer needs to prepare the surface accordingly. The International Concrete Repair Institute (ICRI) manufactures and retails a set of concrete surface profile chips which can be used as a comparison tool on the prepared surface. The correct surface profile is achieved by mechanical means much like in the world of epoxies and urethanes. Contractors should either employ shot blasters, planetary grinders, or scarification equipment to achieve the final surface profile.

Each of these mechanical methods for preparation has it’s use based on the needs of a given floor surface.

“Another key component to surface preparation,” continues Botley, “is sound, clean concrete.”

Industrial Caulk and Seal takes the time during the preparation phase to remove, repair, or patch damaged surfaces prior to application.

Following the mechanical preparation of the substrate, that substrate must be primed to ensure adequate adhesion of the final

ForConstructionPros.com/10074054

56 Concrete Contractor | April/May 2018 | www.forconstructionpros.com/concrete

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The Original & Patented Self-Cleaning Vacuum!

The TheOriginal Original&&Patented PatentedSelf-Cleaning Self-CleaningVacuum!

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ISYOUR YOUR IS IS YOUR DUST DUST COLLECTION COLLECTION DUST COLLECTION SOMEONE SOMEONE ELSE’S ELSE’S SOMEONE ELSE’S AFTERTHOUGHT AFTERTHOUGHT ? ?

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For the big companies that sell everything from concrete grinders to weed trimmers, a dust collector isgrinders just anto to ForFor the the bigbig companies companies that that sellsell everything everything from from concrete concrete grinders weed weed trimmers, trimmers, a dust a dust vacuum vacuum is is just just anamongst an afterthought, afterthought, another another SKU SKU amongst amongst afterthought, another SKU thousands.

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ButBut what what level level of importance of importance dodo they they place place HowHow concerned about onon thecompany. the performance? performance?

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How much is going into making it the best for you?

At At Pulse-Bac Pulse-Bac ourour business business is is dust dust collection, collection, period. period.

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Pulse-Bac Pulse-Bac equipment equipment is manufactured is manufactured in Tulsa, in Tulsa, OKOK bygives by a dedicated a dedicated production production performance and our production team you the team team that that delivers delivers thethe American American Built Built quality quality youyou deserve. deserve.

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overlay. Primers are available from most manufacturers in both latex and epoxy variations. However, experienced contractors tend to rely on the epoxy version. Once applied to the mechanically prepared substrate, sand must be broadcast into the primer to the point of refusal as the primer sets. “Sanding the primer is critical,” Botley concludes,

“turn the floor into a beach.” The sand broadcast step cannot be overlooked or minimized. The overlay systems rely heavily on both the surface profile achieved mechanically and the added surface profile achieved from the sand broadcast.

The team at Industrial Caulk and Seal also stresses an in-depth analysis of the floor surface to verify that a

given floor is the right candidate for a polishable concrete overlay. “These worn floors weren’t finished using modern construction methods. There will be bellies and high spots,” states Botley. This is of particular importance in the polished overlay world as some polishable overlays can be placed as thin as 3/8” and are of a self-leveling nature. Should the contractor not have scrutinized the substrate prior to application, there is a very real possibility that the overlay may not meet the minimum depth requirements within a given manufacturer’s system at a high spot. Without that scrutiny, a contractor may grind through the overlay with a planetary head grinder and expose the old floor during the grind or polishing steps that are integral to a great polished concrete floor.

Specific attention must be paid to door thresholds and other integral building components, as well. In the analysis of the floor, the contractor must note that the final floor surface is being raised a minimum of 3/8” over the highest spot do to the self-leveling nature of the finished product.

Experienced contractors often use a laser transit and employ complicated mapping software to define the complete floor from the very beginning.

OVERLAYS IN APPLICATION

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After a contractor has completed the substantial surface preparation the overlay itself is the next hurdle ahead. As a self-leveling flowable compound the overlay mixing and pouring process is relatively straightforward. The overlays are traditionally in bag form and are designed for small batch quantities, though some contractors choose to work larger floors with a specialized pump truck.

The team at Industrial Caulk and Seal tends to favor Hippo mixers for mixing, pouring, and placement even on larger floors. “If we are faced with a large floor, we may employ multiple mixers and mixing attendants,” Victor Botley states, “The perfect finished floor is our ultimate goal and we only work in batches that we can control effectively. It’s imperative to

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phase the work are to provide continuous placement wherever possible and eliminate unnecessary transitions or cold joints.”

As the overlay is poured experience contractors use a gauge rake and spiked rollers. The gauge rake ensures minimum thickness, and the spike roller immediately removes entrapped air. As the compounds are designed to be self-leveling troweling is unnecessary, but often a smoother may be employed to coax the material to the final level. Most polishable overlays allow the use of aggregates in the mix to both extend the material and achieve a unique final look. It’s important to note that the final product will be ground and polished, and that some or all these added aggregates will be exposed.

This exposure of added aggregates has risen to an art form among decorative concrete contractors, and multi colored chips in concert with an appropriate overlay system becomes a terrazzo like finish. Terrazzo may be the grandmother to polished concrete, but in this type of system the overlay can become her twin sister.

Polished concrete overlays are relatively fast setting with initial set occurring within the first 20-30 minutes and final set falling directly behind at 40 minutes to one hour depending on temperature and humidity. Most systems reach compressive strength of 3,000 PSI in one day and final strength within 30 days.

Most polishable overlays have been engineered to mitigate down time on a floor surface and are able to be polished 24 hours after placement.

concrete world, at present those overlays are making significant impact. As yesterday’s floors are re-purposed for today’s uses and emerge into the light there will continue to be a growing need to figure out materials, means, and methods to return those floors to glory.

Polishable concrete overlays are

another arrow in the quiver of the owner and contractor.

Ed. Note: C.T. “Chip” Marshall is the executive vice president of Industrial Caulk and Seal Inc.. An award winning, large scale decorative concrete and concrete repair contractor. Chip can be reached at website www.industrialcaulkandseal.com.

INTRODUCING THE NEW CORNER TOOL. Manufactured by BORIDE Engineered Abrasives, the Blue Star Diamond Corner Tool is specifically designed as an accessory to the Easy Edge line to grind and polish those hard to reach areas like corners and door jams.

Offered in grits 30, 50, 100, 200 and 400. The corner tool can be used for wet or dry grinding.

THE POLISHING PROCESS Concrete overlays require polishing tools and methods in keeping with the polished concrete world at large and do not require specialized tools or tooling. As with any polished concrete floor surface experienced craftsmen are the critical component to success.

While time will tell if polishable concrete overlays are the true philosopher’s stone in the decorative

BSDDiamond.com · 800.662.0336 · TRAVERSE CITY, MI ForConstructionPros.com/11239670

www.forconstructionpros.com/concrete | April/May 2018 | Concrete Contractor 59

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PRODUCT FOCUS Contractors Need to Be Aware of The Increased Importance of Dust Suppression in the Workplace

Dustcontrol Inc. DC 5900

All DC 5900s are powerful and reliable dust extractors. They are built on robust and sturdy steel chassis for maximum durability, for example on construction sites. With a direct driven three phase turbo-pump the DC 5900 is suitable for continuous operation with large quantities of dust.

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In recent years, the concrete industry has seen an increased emphasis on concrete dust suppression and containment, both for worker safety and jobsite cleanliness.

OSHA’s new regulations for the contractor, demanding greater dust collection on the jobsite. In May 2013, OSHA issued a proposed rule for crystalline silica, which includes revised PEL limits. It will become essential for contractors to outfit tools and equipment with dust containment devices, like shrouds and vacuums, both to control the level of airborne dust that is harmful to breathe and to reduce the labor of cleaning up dust as it settles. These very fine particles can find their way far beyond the work area creating a problem when the jobsite is in an open business, public buildings or open area where dust can migrate. By attaching HEPA dust collectors and shrouds to your equipment, dust can be contained. Be compliant, SAFE and more productive.

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SASE BULL 1250EBS Dust Collection System

BW Manufacturing A-101 Pulse Vac Dust Containment System The Pulse-Bac 1250

The Pulse-Bac 1250 offers a large array of power and collection options including a 20 Gallon Tank, Longopac Bagger and 55 Gallon Drum. Designed to capture dust generated by surface preparation equipment, power tools and for job site cleanup, the 1000 series is ideal for work involving dust from concrete and many other materials. Used by professionals worldwide, the 1250 series vacuums are a great fit for many applications. Compliant with OSHA’s Silica Dust Rule.

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The A-101 Pulse Vac is unlike any other vacuum on the market today. The built in air pulsation system continuously cleans the air filter, making it ideal for the removal of fine dust powders without clogging.

The A-101 Pulse Vac houses a two stage vacuum motor, making it one of the most powerful vacuums that operates on 120V. Your reduction in filter cleaning labor combined with its adaptability to all shrouded equipment, the A-101 Pulse Vac is the most essential and recommended vacuum by contractors today.

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SASE Company Inc. introduces the BULL 1250EBS Dust Collection System now with the Elongated Bag System. The BULL 1250EBS can be used with the SASE PDG 8000, PDG 6000, and all other industry 32 inch diamond grinders.

• Elongated bags feature over 42 sq./ ft. of filter area • Quiet -- only 78 dB • Secondary HEPA Filtration • Manual filter shaker system is durable, dependable and easy to use • 8.5 hp regenerative motor • Soft start • Include 50 ft. of 3 inch hose and 100 ft. of heavy duty power cord • Constructed of 14 gauge steel for longevity in industrial use • Weight: 500 lbs.

• Air flow: 388 CFM ForConstructionPros.com/12056920

60 Concrete Contractor | April/May 2018 | www.forconstructionpros.com/concrete

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INTRODUCING TM

Ultra-compact DURATIQ™ technology

Power meets versatility Introducing the DURATIQ 5 floor grinder with unmatched versatility for professional users. With its ultra-compact size, it’s a powerful tool for all types of grinding jobs in various environments, but without compromising on DURATIQ’s unique technology.

In September 2016, HTC set an entirely new standard for floor grinders with the new DURATIQ platform. HTC is proud to introduce a new addition to the series: HTC DURATIQ 5 – a unique combination of intelligence and raw power in a compact machine.

Experience a machine that combines power and versatility with unmatched ergonomics. htc-floorsystems.com

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PRODUCT FOCUS LAVINA-X Series of Concrete Dust Extractors

Diamatic BDC-3140LPP

The new LAVINA-X series of concrete dust extractors, all manufactured by Superabrasive, are loaded with new features to provide contractors with a more efficient dust extraction solution for a safer work environment. The new range includes a propane and 4 electric models to suit different size grinders and applications. All models are equipped with Hepa filters (H13) with efficiency 99.99% at 0.3 microns, and fully automatic jet pulse filter cleaning system (except V20-X). New features on the larger models include adjustable filter cleaning interval for grinding and polishing, and an option for forced cleaning. There are no compressors to mess with which saves you downtime time for maintenance. The new vacs are all equipped with the Longopac continuous bagging system for safer and easier dust disposal, and come with antistatic hoses with a stainless

The Diamatic BDC-3140 LPP heavy-duty dust collection system is remarkably quiet and designed for multi-purpose use with medium to large grinding, polishing, scarifying and shotblast machines. The vertical profile is compact and offers great maneuverability with large wheels and two swiveling/locking casters. The BDC3140LPP features a 3 primary cartridge filters, Hepa filter and an automatic air pulse cleaning system to help contractors meet the new OSHA silica exposure standards.

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Oneida Air Systems Heavy-Duty Dust DeputyÂŽ Deluxe

Concrete and silica dust have finally met their match. When connected to your dust extractor, the Heavy-Duty Dust Deputy virtually eliminates filter clogging by using cyclonic force to remove over 90% of fine dust and bulk debris. Made from fully seam welded, heavy gauge steel and finished with a rust preventative powder coat, its rugged construction protects your vacuum filter from the toughest dusts like concrete and silica. Fully compliant with new OSHA silica standards.

Includes mobility kit, liner bag holder, hose, and two industrial, 5-gallon dust bins.

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DECORATIVE CONCRETE BY

EUCLID CHEMICAL

Polishable Overlays We’ve got you covered with a complete line of polishing chemicals and two new polishable overlays: Level Top Polish and PC-Agg increte.com (877) 958-5732

800.752.4626

www.xtremepolishingsystems.com

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CPS CAT-5 Extractor Vacuum

The CAT-5 Dust Extractor’s design helps you maintain focus on the job and decreases downtime. This system’s pleated primary filter elements, with non-stick coatings, have excellent dust release to prevent filter blinding and motor overheating.

• HEPA filter has 3X more usable surface area than other comparable vacuums, allowing for a greater amount of air flow while capturing more debris ForConstructionPros.com/12140173

ScanDust 2900

ScanDust 2900 gives you high operational reliability and efficient performance. The dust collector is equipped with: • Hepa 13 filters - takes care of insanitary particles • Longopac – Easy and dust free changes • Jetpulse cleaning system – Pulses the filter in order to keep them clean.

• Gas springs - Easy to adjust the height of the machine.

• Non-marking and puncture-free wheels.

ForConstructionPros.com/20983622

Hilti Universal Vacuum Cleaner VC 300-17X

The HEPA-ready VC 300-17 X universal vacuum cleaner provides 300 cfm of power delivered by two turbines.

• Protected by a tough, field-tested casing that can hold 17 gal. of debris • Can be used as a wet or dry vacuum and is equipped with an automatic filter cleaning system • 99% filter efficiency enables OSHA 1926.1153 Table 1 compliance ForConstructionPros.com/20983601

equipment and tools you can count on. every time.

NEW! L20-GTX, the most reliable & powerful 20” propane grinder on the market.

INTELLIGENT FUEL MANAGEMENT SYSTEM, BLUE SKY ENGINE WITH LOWER EMISSIONS AND THE HIGHEST OUTPUT IN THE 603CC LPG CLASS, TRULY VARIABLE SPEED, DUST SUPPRESSION FINE MISTING, LOW-FRICTION CHAIN GEAR PLANETARY DRIVE, and many more new features...

www.superabrasive.com ForConstructionPros.com/10076302

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PRODUCT FOCUS HTC D60 Dust Extractor

The new HTC D60 dust extractor has been especially designed for floor grinding and in particular with HTC DURATIQ grinders. Unique and innovative functions such as DURATIQ remote connection, automatic filter cleaning and integrated pre-separation produce unbeatable synergic effects in the form of increased productivity and grinding capacity.

• Automatic filter cleaning along with integrated pre-separation ensures continuous operation and consistent and safe dust extraction over time.

• Other benefits are the extremely compact dimensions, smart features for ergonomic handling and high safety standard with HEPA H13 filters.

• The HTC D60 is equipped with a digital control panel (HMI) for monitoring the essential functions of the extractor.

• A 3.5-inch LCD display provides information clearly and sharply about the critical factors for optimal dust extraction, such as airflow, under-pressure and filter status.

• The HTC D60 is a very compact dust extractor that is just 68 cm wide and 140 cm high in the transport position, which means that it can be transported in most work vehicles and easily passes through standard large door openings.

• Extra large wheels with powerful brakes facilitate moving over thresholds and other obstacles.

• The machine is equipped with a PTFA coating (Teflon) conical filters and HEPA H13 filters. The quick-lock system makes it easy to change filters.

• The HTC D60 is recommended for floor grinders with a grinding width of 600–700 mm.

ForConstructionPros.com/20977263

Husqvarna S 26

The S 26 is a powerful, single-phase HEPA dust extractor able to handle building, grinding, plaster and concrete dust.

Equipped with two tested and certified HEPA H13 filters. Features include Jet Pulse pre-filter cleaning, hour counter and vacuum meter for filter control. The non-marking wheels are puncture free and lock at the front. The Longopac bag hose system ensures simple, dust-free bag changes.

ForConstructionPros.com/20983546

www.facebook.com/polishedconcreteuniversity

Continental breakfast & fully catered lunch will be provided throughout this 5 day course.

GET CERTIFIED! Polished Concrete University has made it affordable for novices to get started in an exciting and lucrative field. For five action packed days, you’ll receive training from some many qualified instructors, while gaining hands-on experience with the equipment and products you’ll use on the job.

Master the different levels of polished concrete, from cream concrete to heavily exposed aggregate and satin finish to super high gloss. You’ll also learn different floor finishes that are specific to today’s light box and big box retail.

Don't wait, register today!

9:00 AM - 6:00 PM

2200 NW 32nd Street #1100, Pompano Beach, FL 33069

MAY 14 - 18

JUNE 11 - 15

JULY 16 - 20

www.polishedconcreteuniversity.com (855) 890-7880 | info@polishedconcreteuniversity.com

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INDEX ADVERTISER..........................................PAGE

ADVERTISER..........................................PAGE

Allen Engineering ..................................................................... 13 American Honda Motor Co...................................................... 41 Ameripolish................................................................................ 45 BackSaver................................................................................... 12 Bloom Manufacturing Inc.......................................................... 44 BORIDE Engineered Abrasives................................................ 59 Brickform, A Division of Solomon Colors, Inc......................... 58 Briggs & Stratton ........................................................................ 7 Butterfield Color........................................................................ 25 CDC Larue.................................................................................. 57 Collomix USA............................................................................. 16 Concrete Pump Supply............................................................... 5 Crafco Inc..................................................................................... 9 Curb Fox Equipment................................................................. 24 Curb Roller Mfg. LLC................................................................. 65 Decorative Surface Solutions Group........................................ 23 Euclid Chemical Company........................................................ 62 GelMAXX.................................................................................... 47 HTC Floor Systems.................................................................... 61 Husqvarna Construction Products..................................... 55, 68 Jlin Corp..................................................................................... 37 Jon Don...................................................................................... 43 Kingdom Products..................................................................... 24 Ligchine International Corp........................................................ 2 Line Dragon, LLC....................................................................... 49

Lura Enterprises, Inc.................................................................. 67 Metzger/ McGuire..................................................................... 64 Multiquip.................................................................................... 33 Niagara Machine Inc................................................................. 44 Nox Crete Products Group....................................................... 56 Olin Pump.................................................................................. 21 Polished Concrete University.................................................... 64 Putzmeister America................................................................. 11 The Quikrete Companies.......................................................... 17 Reef Industries, Inc.................................................................... 25 Reliable Diamond Tools............................................................ 39 Simpson Strong-Tie Co., Inc..................................................... 35 Slip Industries............................................................................. 65 Solomon Colors, Inc.................................................................. 52 Somero....................................................................................... 51 Spin Screed................................................................................ 45 Superabrasive Inc...................................................................... 63 Trinic............................................................................................ 38 W.R. Meadows, Inc.................................................................... 53 Wirtgen America Inc.................................................................. 29 Xtreme Polishing Systems......................................................... 62

NTRACTORS O C AY W E H T G IN G N CHA SHAPE CONCRETE!

AROUND THE WORLD

At Curb Roller Manufacturing we are proud to be the world leader in shaped concrete roller screeds, producing quality products for everyday concrete work. Our portable, ergonomic machines not only make it easy to shape standard curb, gutter and sidewalks, but also flume, v-gutter, swale and other unique shapes. Let us show you a faster, more efficient way to shape concrete today! www.curbroller.com ForConstructionPros.com/10074638

785-467-3132

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THE LAST PLACEMENT

5

By Brad Humphrey

Ways to Engage, Energize Baby Boomer Workers

Tips to help keep Baby Boomers working hard for your company.

T

here are more than a handful of way to keep those Boomers (like me) energized and contributing to your organization. After all, there is a lot of knowledge and expertise stored in the minds of those who, eventually, will be retiring. But they’re not retired yet!

Here are five tips to help keep those Baby Boomers working hard for your company.

1

Engage Your Boomers to ID the High Potential Workers (HPW) Those Boomers on your projects, leading that crew, running their department, etc., they know who the real “players” are for your company.

Let them contribute by sharing their thoughts and perspectives on tomorrow’s leaders, craftsman, and loyal employees for your company. They know who the real jewels are so let them share with you their choices.

2

Match Your High Potential Trainers with High Potential Employees One of the tendencies developing among our Millennial workers is their quick assessment of whether they are being trained early in their employment. A client of mine discovered, to both of our dismay, that the new employee averaged less than 60-days in their employment.

The primary reason? They felt that they have not been trained on anything of value. We immediately began a matching of older, more experienced, worker with a new hire.

We didn’t keep all the new hires but we witnessed the longevity of the new employees increase more than 300%, some even staying longer. It can be done but you must engage your willing Boomers.

3

Ask Your Boomers for Their Assistance Go to your Boomers and sincerely ask for their assistance in teaching, mentoring, coaching, or befriending a new hire, especially a Millennial.

Explain to your Boomers what you are doing, what they can do to assist you, and why it is important that they transfer their knowledge and experience to the new hire. You may be surprised to find how many Boomers will help you and may surprise you with all that they can do to assist your new hires.

4

Keep Training & Educating Your Boomers I may have seen this slip up as much as or more than anything else contractors will do. Many construction owners and leaders are so focused on getting the “young’uns” trained that they forgot to keep training the Boomers. This mistake can cause many Boomers to think, “Well, I guess they don’t care about me anymore.” Trust me, it happens more than you think and you don’t have to do this! Even if it’s the third or fourth time your older Foreman have been through leadership training in twenty years, they could use the refresher.

5

Never Slow Down Encouraging Your Boomers This may sound too easy but this point might be the second mistake I witness many contractors making.

Again, we are so focused on encouraging our new workers that we often forget to say, “Thank you for a great effort,” to our older workers. I’ve never yet witnessed a Boomer telling their senior leader, “Really, Bob, quit telling me thanks and how great I am…you’re killing me boss. Really, you’re causing head to swell.” Most of time I hear complaints from the older worker about all the cheerleading and “love” the newer and younger workers are getting.

Re-energizing your Boomers may do wonders for your company and help improve the performance and profitable results driven by your Boomers. Just remember: There’s a whole lot more you can gain from your Boomers, so be careful that you don’t send signal that their time has come and gone. Some of their best contributions for you and your company may be yet to come.

May the “fountain of youth” satisfy the thirst for the Boomers in your company who still have much to do and contribute!

Ed. Note: Brad Humphrey is President of Pinnacle Development Group. He can be reached at humphrey.brad@gmail.com.

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Conical Pour

4-Minute Driveway

Trolley System

82' Circular Pour

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ONE SOURCE FROM START TO FINISH

INTRODUCING OUR NEW COMPACTION AND CONCRETE FINISHING EQUIPMENT We strive to be your one source for concrete equipment and diamont tools. That is why we are proud to introduce a full range of Husqvarna compaction and concrete finishing equipment to supply you with the best equipment through the entire process - from ground compaction to a finished concrete surface. Our range of compaction equipment includes rammers, reversible plate compactors, forward plate compactors and drum rollers. Finishing equipment includes concrete vibrators, screeds and trowels. Call your local Husqvarna representative to learn more.

www.husqvarnacp.com facebook.com/husqvarnaconstruction youtube.com/husqvarnaCP HusqvarnaCP_Americas Copyright © 2018 Husqvarna AB (publ.). All rights reserved. Husqvarna is a registered trademark of Husqvarna AB (publ.).

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