CoatingsPro Magazine Supplements

Concrete Dec 2018

CoatingsPro offers an in-depth look at coatings based on case studies, successful business operation, new products, industry news, and the safe and profitable use of coatings and equipment.

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Page 13 of 43

SPONSORED CONTENT 14 CONCRETE COVERED DECEMBER 2018 COATINGSPROMAG.COM Concrete Proof Concrete Proof continued from p. 11 elastomeric acrylic product that can bridge hairline cracks and withstand subtle movements. Generally speaking, repair options may include epoxy and polyurea joint fillers, cementitious patching, sloping compounds, fiber-reinforced polymers (FRP), jackets, and self-leveling cement systems. Filler products are often injected in cracks and control joints of industrial floors receiving heav y-duty vehicle traffic, while self-leveling systems can be used in facilities such as water treatment plants, industrial containment areas, and warehouses. "Our most popular solutions generally fall into one of four categories: curing freshly placed concrete to achieve its maximum design strength and durability; treating and protecting concrete to extend its service life; repairing damaged concrete; and improving the aesthetic qualities of concrete, which is often combined with concrete cure, protection, and repair," Fauth explained. "Some of the more popular solutions are multifunctional in nature," he added. "Examples would include products that both cure and protect freshly placed concrete, such as our Silencure family of cures with a long-lasting penetrating silane sealer, or repair mortars for damaged concrete that also include migrating corrosion inhibitors for added protection of structural rebar like our ChemSpeed 75, ChemSpeed 75 ES [extended set], and ChemPatch VO1 [vertical and overhead]." Other providers of repair and restoration products include Rust-Oleum's Seal-Krete, the Super-Krete line from Arizona Polymer Flooring (APF)/Innovative Chemical Products Group, VersaFlex's SL/75 polyurea elastomer joint filler, and polyurethane injection resins under the Prime Flex brand from Prime Resins. Preparation Makes Perfect Once all moisture and repair concerns are tended to, the first step in applying a new concrete coating system is typically preparing the surface by making it clean, dry, and free from defects. In many cases, a proper surface profile must be achieved. Blasting, grinding, and high-pressure waterjetting are among the most popular preparation techniques. "W hen you look at coating failures on concrete, 90 percent of the time we're able to trace it back to improper surface preparation," said Rust-Oleum's Stanley. "Most of the time, different coatings will give varying differences on their surface prep requirements. But most everyone these days goes right to mechanical with grinding or shot blasting, because etching doesn't always get the job done anymore. You know you' ll have the best chance for adhesion with something that's going to be grinded or blasted." Making things more complex is the relationship between the machines and each individual piece of concrete. "If you're using a shot blaster for an angular profile, which is what we prefer, that same shot and same speed of machine can create different profiles based on the softness or hardness of the concrete," Ball said. Companies such as BlastPro Manufacturing, Blastrac, and Marco specialize in blasting equipment and abrasives, while Diamatic, Robert Bosch Tool Corp., General Equipment, and DEWALT are among grinding providers. "What we've done recently is launch our brushless line of grinders," said Ricky Cacchiotti, product manager for concrete at DEWALT. "ere are certain applications we can't tackle with a cordless tool, so that's where the brushless corded grinders come into play. ey're small but powerful. Ergonomics is also a big deal, as is maintenance with anything related to concrete. It's the toughest environment for a tool to live in and work in, so the durability of these units is exponen- tially better." For jobs where cordless is an option, DEWALT's FLEXVOLT system of battery-powered tools includes surface grinders, rotary and demolition hammers, and saws. Another smaller surface grinder is the SG24/E model from General Equipment. e grinder is powered by a 2-hp electric motor, providing a powerful solution for grinding in areas where a gasoline engine is not practical or is prohib- ited by regulations. For jobs where gasoline engines can be Concrete can chip, crack, and spall. Before installing a topping, contractors should first repair and fix any defects. Several companies offer products that help restore concrete. One such is Rust-Oleum's Seal-Krete line. When it's finally time to top the concrete, contractors must first prep it to ensure proper adhesion. Blasting, scarifying, shot blasting, waterjetting, and grinding are all options. DEWALT is one company that offers grinding tools.

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