Concrete On-Site April 2022

APRIL 2022

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BRAFASCO, BROCK WHITE & NCA BOOTH

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IN THIS ISSUE: 30 CCE Preview | 32 CCE Product Showcase | 38 Screeding Technology

SHOW PREVIEW

CANADIAN CONCRETE EXPO

READY TO ROCK New dates, same location for Canada’s fastest growing construction trade show.

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30 / APRIL 2022

CCE EXPO 2022 Wednesday May 18, 2022 9 a.m. to 6 p.m.

Thursday May 19, 2022 9 a.m. to 3 p.m.

The Canadian Concrete Expo is set to take place May 18 to 19 at the International Centre in Mississauga, Ont.

face event will an introduction Location The International Centre provide the to Hilti’s Jaibot 6900 Airport Road value our exhibiconstruction robot.

Mississauga, ON L4V 1E8 tors and attend“We’re looking ees have come to forward to a fabulous Show Entrances: expect.” show and are very optiHall 2 & 4 This year’s show will mistic that it’s going to be provide attendees with the well attended and very successability to engage with more than 300 ful to all,” adds Galloway. exhibitors, network with more than 7,000 Canadian Concrete Expo is the only attendees, and to take in more than 30 national trade show in Canada dedicated live presentations covering in-depth industo the concrete, aggregates and constructry topics and product demonstrations. tion industries. The show will be following Discussions will range from techCOVID-19 safety protocols, which are regunical to operations, such as the use of larly updated on the Canadian Concrete fibreglass in the insulated concrete form Expo website. industry and how to develop an effective To stay up to date on the latest exhibtraining program. itors, demonstrations, education sessions Technology sessions will include a and safety protocols, visit walk-through of Procore’s platform and www.canadianconcreteexpo.com.

PHOTO COURTESY OF 2020 EXHIBITIONS

fter an extra-long COVID-related break, the fourth annual Canadian Concrete Expo (CCE) is now just weeks away.

Canada’s national trade show dedicated to the concrete construction industry is returning to the Greater Toronto Area when it lands at the International Centre in Mississauga, Ont., on May 18 and 19, and event organizers are promising to make up for lost time.

After seeing a 30 per cent increase in attendance in 2020, Stuart Galloway, president of 2020 Exhibitions, the organizer of the show, is expecting more than 6,000 attendees to hit the 250,000 square feet of show floor at this year’s show.

“It has been realized by a lot of exhibiting companies that by having the break due to COVID where they couldn’t do trade shows for two years, the real value of these shows has shown through,” he says. “Demand from our side has been really high. We’re excited to showcase a great variety of products for concrete applications.”

The show is an ideal environment to source new suppliers, reconnect with current providers, find real business solutions and build partnerships. CCE is a must attend for those in the industry looking to maintain and build contacts, and to be educated in Canada’s diverse and changing concrete construction industry.

“The Canadian Concrete Expo puts on an event that can’t be replicated in the digital world,” says Galloway. “Beginning last spring, our team looked at several digital-only and hybrid event models for 2021 but decided nothing but a face-to-

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CCE 2022

A SNEAK PEEK AT THE SHOW FLOOR

Want to know what to inquire about from the manufacturers and service providers exhibiting at Canadian Concrete Expo 2022? Why not start with these products?

HOSKIN There are a lot of variables to consider when deciding what solution to use for monitoring concrete temperatures. Hoskin Scientific carries a full line of products for any size pour, each with its own unique advantages. Whether you require maturity, remote monitoring or a simple low-cost solution, the company has a wealth of experience to assist you in selecting the appropriate product.

Booth: 2473

BRAFASCO Brafasco’s easy-to-navigate digitized Concrete Solutions product guide focuses on the key commercial concrete markets.

The guide introduces the construction sectors, followed by a streamlined, to-the-point fundamental product listing of products used on all common jobsites.

Businesses can realize a range of options likely not considered in the past when planning their next project.

Booth: 2245

HUSQVARNA Weighing in at 11.5 kg, the battery-powered BV 30i from Husqvarna can be used indoors, operates on batteries that fit other Husqvarna products, and is compatible with all existing BV 30 screed profiles. The interchangeable blades allow the user to make use of five different working widths.

The cordless, lightweight unit operates with low vibrations and does not emit direct exhaust fumes. Two chargers are available, the QC330 and the QC500 fast charger.

Booth: 2535

MAPEI DEWALT Designed for heavy-duty demolition, concrete, and masonry work, the Dewalt 60V Max 22 lb. cordless SDS Max Chipping Hammer is designed to break down dense concrete with up to 19.4 joules of impact energy. The hammer can tackle horizontal or downward chipping for mid-to-lower wall and flooring tasks and is also ideal for demanding highway jobs. The midweight 60V Max 15 lb. cordless SDS Max Chipping Hammer delivers up to 10.5 joules of impact energy. Booth: 2560

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MAPEI’s Mapefibre synthetic fibres for concrete are designed to reduce or eliminate the need for steel reinforcement.

Micro-synthetic fibres can be added to mitigate plastic shrinkage cracking, while macro-synthetic fibres add tensile strength and flexural toughness in post-cracking conditions. The company’s technical services team is available to help with a full range of services, from structural calculations to the analysis of customized packaging, as well as on-site technical assistance and lab testing.

Booth: 2561

AMVIC

GOMACO

Insulated Concrete Form (ICF) and expanded polystyrene (EPS) insulation building materials manufacturer Amvic has introduced Amrad, an insulated under-slab depressurization panel and a key component in a radon gas mitigation system. The panelized solution uses a unique channel design, void percentage, film, and foam density to create a strong and durable panel that gives builders the ability to build an insulated concrete slab while meeting radon building code requirements that improve indoor air quality for occupants.

Booth: 2272

The Gomaco CC-1200e electric curb machine is equipped with a 48 VDC lithium-ion battery pack. The paver has enough power for a full day of paving but produces zero-exhaust emissions and zero engine noise. The machine features the company’s exclusive G+ radio remote control system that puts all machine operations in the hands of the operator. It has the ability to slipform a 24-inch (610 mm) radius, with mould positioning possible on either side of the machine.

Booth: 2339

MILWAUKEE The new MX Fuel Vibratory Screed is the latest addition to Milwaukee Power Tools’ MX Fuel Equipment System, providing a dedicated equipment solution to concrete contractors. Engineered to deliver enough power to pull a 16-foot bar without the use of gas, and to offer two hours of run-time per charge with a 12-foot bar, the vibratory screed is designed to reduce user frustrations while meeting power requirements and exceeding runtime needs.

Booth: 2355

SOMERO Offering 360-degree machine rotation, a 25-foot (7.62 m) telescopic boom, and a choice of pivoting screed heads, the S-28EZ from Somero targets high quality and production rates with unsurpassed maneuverability. Its customized Oasis laser control system is intuitive to operate and can be upgraded as technology advances. A redesigned, EZ Clean Head is designed to reduce clean-up time and improve long-term maintenance.

Options include, but are not limited to, 12- or 14-foot head widths, roller plows, spray bars and the Somero Floor Levelness System.

Booth: 3711

MAX USA An alternative to hand tying, the TwinTier from Max USA is designed to provide up to 5,000 ties per charge and take approximately a half-second per tie, reducing tying times as well as wear and tear on installers handling rebar tying operations.

Use of the machine is designed to be efficient, while reducing the risk of developing musculoskeletal disorders from the repetitive motion involved in the job of tying rebar.

Booth: 2719

HOSKIN Whether assessing a new build or aging infrastructure, Hoskin Scientific offers cutting edge technology on in a wide range of concrete inspection tools. As the Proceq/Screening Eagle distributor in Canada for more than 30 years the company has expertise in GPR, ultrasonics, corrosion mapping, and much more.

Booth: 2473

on-sitemag.com / 33

TROWELING

The

Finishing Touch

Some simple maintenance can help extend power trowel performance.

P

ower trowels are an important tool in the arsenal of concrete contractors, so they can ensure a polished, level finish for the surfaces they are forming. That said, the applications that require these machines aren’t typically easy on them, so a solid maintenance plan is essential for keeping your power trowels in working order and maximizing the life of the equipment.

To learn about maintenance best practices for power trowels, On-Site reached out to well-respected veteran concrete contractor Robert Blazejewski, owner/operator of Cooksville Concrete Finishing Inc., which performs placing and finishing, cutting and removal, restoration, excavation, and concrete forming services for largescale residential and commercial projects throughout the Greater Toronto Area and as far north as Owen Sound, Ont.

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“The most important thing for the guys to be doing is cleaning their machines every time after every use,” Blazejewski says. “The thing we found is guys are tired by the time they’ve finished at three, four, five in the morning, and leave the machines full of concrete.”

He says that’s a recipe for disaster.

“That’s going to destroy your machine.

Best practice is to obviously try and get your guys after every single use to scrape down the machines, flip them up, give them a clean all the way around.”

He has a few tips that help make cleaning the machines as easy as possible.

“We carry around small margin trowels; everybody has got them in their buckets.

So, one guy will flip up the handles and you just scrape around the loop, scrape all your trowels off, scrape the centre,” Blazejewski says.

As for the gear box, he recommends topping it up with gear oil once a year.

“There’s also nipples on that allow your blades to go up and down, that’s usually one of the first things that stop to work on there, so you’ve got to grease that every three to four uses,” he adds. “So, carry around a margin trowel or scraper and a grease gun.”

He also suggests keeping oil on hand to perform oil changes on the machines.

“A lot of the time, my guys will just change them on site. They won’t even deal with the shop,” says Blazejewski. “When they feel like it’s had enough hours, they flip it upside-down into a bucket and change it on site.”

While the machines are built to handle the rough applications they are designed for, contractors should still pay close attention to things like the spider plates.

PHOTOS: COOKSVILLE CONCRETE FINISHING INC.

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TROWELING

The most important thing for the guys to be doing is cleaning their machines every time after every use.”

“Keep an eye on your spider plate. A lot of guys drop down the spider plates or push down the handles too much and they bend the spider plate underneath,” Blazejewski advises.

BUYING AND RENTING Over his 20-plus years of working in the world of concrete, Blazejewski has operated and owned his share of power trowels. Currently, his company has three ride-on power trowels and 14 walk-behind power trowels.

“They’re made pretty well. We tend to use a lot of Bartell equipment. We’re also just striking into some Italian equipment called Barikells, which are very nice machines because they make a custom machine that’s 30 inches and a ride-on, so you can sit between doorways,” he says.

For buying new, he says the price points typically range from $18,000 to $40,000 for ride-ons and $2,800 to $5,000 for walk behinds.

“There’s manual and hydrostatic drive.

Manual is all controls with gears you move

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back and forth,” Blazejewski says. “And then electronic-driven, hydraulic-driven, those are just joysticks. That’s when you’re looking at spending $40,000 for a machine.”

He adds that there are also machines starting to come to market that are remote controlled, but he’s personally not sold on that concept.

“I don’t know how much I believe in that, because to me you’ve got to see your floors when you’re working it,” he says.

“I’m not sure what kind of quality a guy gets when he’s standing 30 feet off the slab looking at his machine run around.”

He prefers to be much closer to the action.

“You’ve got to be over top of your floor and see the quality you’re putting into it. You can see the holes you’re missing, rocks popping, anything like that. You’re not going to get that when you’re 30 feet away,” he suggests. “It’s hard enough to see that when you’re on top of it.”

Blazejewski says buying a power trowel is not unlike purchasing a car. When buying used, he says it is necessary to take time to thoroughly inspect the machine and look at its general condition. If it hasn’t been maintained properly, it’s bound to fail.

“If it looks like in its rough condition — if they’re not cleaning the machines, they’re not greasing them and oiling them — most likely it wasn’t taken care of,” he says.

When purchasing a power trowel, also

keep in mind the type of applications it will be used on.

“Look at the size of the project, if they have a big enough floor, you might want to be looking for a 48-inch, ride-on power trowel. If you’re doing small basements, maybe a 36-inch power trowel,” Blazejewski says.

Bottom line, whether a contractor buys a power trowel new or used, if they take care of it, it should run for a while.

“There’s really not much too them, so, if you regularly change your oils and grease your fittings, they’ll last you quite a long time,” he says. “We’ve had some machines that have been running 10, 12, 13 years every day on a jobsite with no issues with them... you can get 10 to 20 years out of a machine if you maintain it properly.”

SAFE OPERATION When it comes operating power trowels safely, the main thing is to maintain good jobsite awareness. Blazejewski says that knowing potential hazards where the power trowel is being used is an absolute necessity.

“Stay away from things like rebar and hazards, know your surroundings,” he says.

“One of the biggest dangers with walk behinds is walking backwards with it and stepping off an edge, or tripping over a piece of rebar. When not keeping an eye on what’s around, I’ve seen lots of guys trip and fall.”

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CONCRETE

EXPLORING

SCREED OPTIONS How to choose a concrete screed.

W

BY SETH ULMER

hether shopping for a new car or new concrete equipment, people are bombarded with numerous options. Making decisions can be overwhelming. For concrete contractors, these decisions may extend to choosing the right screed, an essential purchase, and a critical tool for providing the smooth, level finish for concrete work.

By carefully considering the screed types available, contractors can see maximum productivity from their investment.

The most common screed categories include roller, truss, laser, power and hand screeds. Each has unique features that, when aligned with project goals, can improve ROI.

Roller screeds broadly consist of a detachable pipe connected to a drive head with an extended handle for upright, ergonomic operation. These screeds are known for minimal setup, low learning curve and consistent, quality results with less reliance on the operator’s skill level.

Roller screeds use a spinning motion to move concrete, a method that reduces operator fatigue and allows for improved integration of aggregate throughout the pour compared to vibratory methods that may cause the aggregate to settle. These screeds are versatile and can be used for a variety of pours, often up to 30 feet wide, depending on the power source.

The roller screed’s detachable design

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also makes for a highly portable option when compared to bulkier and heavier screeds like laser screeds. Some manufacturers even offer linkable pipe sections to increase portability and versatility.

Features like three-way adjustable and lockable handles for improved ease of operation and a kickstand to keep the drive head and handle out of the concrete allow crews to quickly adapt to various jobsite needs. Contractors have four different power options to choose from: battery, corded, hydraulic and gas-powered.

Battery-powered roller screeds are easily

maneuverable and can handle pours up to 22-feet-wide. These versatile machines can be especially useful for contractors working in basements or factory settings indoors, at farms, or communities in remote locations.

Depending on the slump and pipe length, a contractor can screed off 1,800 to 2,500 square feet of concrete with just one fully charged battery. Battery operation provides fume-free screeding for those working in closed off environments, or any area where fumes may be a concern. These also generally require less setup time, and no cords or hoses are in the way on the site.

PHOTOS COURTESY OF CURB ROLLER MANUFACTURING

ROLLER SCREEDS FOR VERSATILITY

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VIBRATORY SCREED

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Some battery-powered roller screeds can also provide cross-platform use by using the same rechargeable lithium-ion batteries found in common handheld power tools.

For special projects, such as circular pours, battery powered roller screeds provide a convenient single-push-button directional change. This allows contractors to easily change their screeding direction to avoid cold joints or other structural flaws that can occur when concrete cures unevenly. Other screed types may require a complete disassembly, drive head rotation and reassembly of the screed to reverse direction.

Despite all the conveniences battery-powered roller screeds offer, if power accessibility isn’t a concern or portable jobsite generators are abundant, some contractors may opt for a corded screed.

Corded electric roller screeds offer many of the same benefits and capabilities as their battery-powered brethren. They are fume-free for indoor jobs, and some provide a single-push-button directional change for screeding unique pours. With a nearby outlet or reliable generator, contractors can have the reassurance and convenience of seemingly endless power.

While enjoying the convenience of power, contractors must consider proper care to ensure the cords don’t become tangled, unplugged or damaged while on the jobsite. And relying on a separate power source, like a generator, can come with its

own worries. That can include staying on top of fuel availability, general maintenance or fume concerns.

Battery and corded power can offer an immensely convenient and versatile screeding solution to any contractor’s fleet, but some heavy-duty applications, like road drainage and ditch liner pours, require large custom drums and a screed powerful enough to drive them. This is where hydraulic roller screeds shine.

Hydraulic-powered roller screeds have the power to move up to six inches of concrete along a pour while the operator remains in a standing position. Additionally, most hydraulic roller screeds accept six-inch tube in lengths up to 30 feet.

Some manufacturers also offer custom drums made to various job specifications, such as sidewalks, parking lots, residential streets, large highway ditch liners, and more.

Like corded screeds, hydraulic screeds require a separate power source. Look for a manufacturer that provides a portable hydraulic power pack to match their hydraulic screed’s exact specifications. With this option, contractors don’t have to tie up a host machine to power their screed.

These screeds are also generally two to three times heavier than battery and corded roller screeds, making it possible to take on heavy-duty jobs. Contractors should consider how to accommodate the additional weight before committing to these Roller screeds are known for their easy operation, low learning curve and the consistent, quality results they provide with less reliance on the operator’s skill level.

powerful screeds.

Gas-powered roller screeds have a similar setup as the other roller screeds but with a motor attached to the drive head. These screeds offer another option for contractors who typically screed large pours that require a longer pipe, often up to 30 feet wide.

The motor produces screeding power that rivals that of hydraulic screeds and offers a viable, familiar alternative for those preferring a gas engine.

Unlike the other screeds, more care is required with gas-powered machines. The screed motor needs to be in an upright position to avoid gas and oil from leaking out. This may prove challenging due to the heavy weight of the engine on the drive head.

These screeds have location limitations as well, as they cannot be used indoors due to the exhaust and fumes from the engine.

Engine vibrations present another area of concern. The high vibration from the engine can cause the throttle cable to slip, which may necessitate continuous readjustment.

TRUSS SCREEDS FOR LENGTH A major design shift from rollers, truss screeds level off concrete with vibration instead of a spinning pipe.

These screeds are expandable and come in multiple sections that resemble a truss design to help maintain rigidity for longer lengths, even beyond 60 feet.

Truss screeds can be an excellent option for the largest jobs, like screeding an entire roadway.

Vibrations from a motor attached to the truss carry throughout the screed as contractors guide it along concrete forms, flattening and settling the concrete to remove trapped air, increase concrete strength and provide a smooth finish.

However, due to the vibration, these screeds are generally not used on a slope.

The aggregate in concrete tends to settle with vibration and unevenly dispersed aggregate can create spots of varying strengths that can result in structural flaws and damage over time.

LASER SCREED PRECISION As a recent entry to the screed market, laser screeds are growing in popularity

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OS_APRIL22_LAZ.indd 40

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for larger concrete pours and those that require a high degree of precision. Laser screeds can be found in a variety of styles ranging from telescopic attachments to ride-along machines.

The screed’s laser arm ensures a precise, accurate and evenly leveled surface while reducing the need for excessive labour. The average laser screed can screed approximately 240 square feet of concrete in one minute. This equipment is a gamechanger for the concrete industry.

While laser screeds bring many benefits, they come with a very noticeable downside – an upfront price tag that can reach up to $350,000.

Additionally, some of the widest laserguided screeds available on the market have a maximum width of 20 feet, making their functions more specialized and significantly affecting their overall versatility.

POWER SCREEDS FOR SOLO ARTISTS In what could be considered an assisted-hand screeding method, power screeds,

Battery-powered roller screeds provide arguably the most convenient and maneuverable screed option available today.

also known as wet screeds, consist of an engine and extended handle placed in the centre of a traditional board/blade that is in contact with the concrete. Power screeds use vibration to help the blade level the

concrete. These require a lot of skill and experience by the operator.

Although more ergonomic and efficient than traditional hand screeding, power screeds require the operator to stand in the

TIE REBAR

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All MAX products are engineered to perform on professional contractors jobsites and with MAX’s 200 R&D engineers we have continued to improve upon MAX proprietary technology, which led to the invention of the TWINTIER® rebar tying tools. TWINTIER® technology allows the tools to tie 4,000 ties per charge while delivering just the right amount of wire for greater productivity and cost savings. These unique innovative features make the TWINTIER® the most efficient rebar tiers in the industry. Today, MAX manufactures a full line of rebar tying tools that can tie between mesh up to #9 x #10 rebar.

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on-sitemag.com / 41 OnSite_MaxUSA_April22.indd 1

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CONCRETE poured concrete while screeding. The vibration has similar benefits and drawbacks to that of the truss screed. Due to their one-man operation and centre support, manufacturers typically limit the board/ blade sizes to around 15 feet.

Some screeds provide a single-push-button directional change. This is a convenient feature for special projects, such as circular pours.

TRADITONAL HAND SCREEDS Classic hand screeding, which traditionally uses a wooden board, might cut it for the one-off small concrete job, but any serious contractor knows the life-long pains that come from years of stooping over a heavy board and sawing it back and forth along forms to screed concrete.

Although the materials have evolved from hefty two-by-four lumber to lighter-weight aluminum alloy bars, the design and method has largely remained unchanged.

In addition to the back-breaking labour, hand screeding methods using boards require the skill of an experienced professional to remain true to grade and achieve consistent results since there’s no assis-

tance from vibration or a spinning pipe. This can prove challenging on large pours, even with decades of experience.

Seth Ulmer is the sales manager at Curb Roller Manufacturing, a world leader in shaped concrete roller screeds. He joined the company after spending over a decade in the concrete and construction industries.

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