CoatingsPro Magazine Supplements

Concrete Dec 2017

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 14 of 40

14 CONCRETE COVERED 2017 COATINGSPROMAG.COM work surface. Within concrete repair, one common abrasive used is crushed glass, said Marco's Cody Lanning, adding that the sub-angular shape of crushed glass provides a uniform profile while easily removing paint, stains, and debris from the surface. e unique characteristics of crushed glass abrasives leave behind less particle embedment than most other abrasives. "e Vapormaster is part of a blasting system that creates a water-and-abrasive mixture to prepare a blast surface while minimizing dust generated during the blasting process," Lanning said. "By reducing dust during blasting, the operator has improved visibility at the work site. Typical applications include coating removal, concrete cleaning, concrete repair and restoration, steel tanks, and automotive repair and restoration." Diamond grinders and steel shot blasters are other widely used concrete preparation options. But Naslund warns that the indiscriminate application of these prep tools could cause more harm than good by desta- bilizing, cracking, or undermining the original substrate. In turn, SMITH recommends a four-step method of preparing, selecting, prepping, and perfecting to ensure that not only are surface contaminants removed, but the right porosity is created to maximize mechanical bonding for the new coatings or overlayments without micro-cracking. "Mechanical bonding occurs when the coating material seeps into the pores of the surface to create a tight mechani- cal bond, assuring any new binders that are applied perform for their entire engineered life," Naslund said. General Equipment is another company in the surface preparation space, with products including surface planers, single- and dual-head surface grinders, crack saws, floor covering strippers, and pneumatically powered demoli- tion tools. "Based on the concrete assessment and the final try using a polyurethane foam as a patch, intending to follow that with the epoxy injection. Lo and behold, the polyure- thane penetrated the pipe and sealed the leak on its own." Barton worked with the manufacturer to build the market for polyurethanes for sealing leaks, and his company now produces its own under the Prime Flex brand. "We make products that seal leaks fast and for good, prior to the applica- tion of coatings and lining systems," Hammacher said. Prepping the Surface Once moisture is addressed and defects are tended to, contrac- tors can finally start to shift their focus toward applying a new system to the concrete. But before the finishing solution can be applied, the surface should be freshly prepared by making it clean, dry, and free from surface defects. In many instances, a proper surface profile must be achieved. "Getting coatings to last on concrete is tough," said Jeff Naslund, media manager at surface preparation solutions company SMITH Manufacturing. " To assure a long-term mechanical bond, new coatings must be applied onto surfaces that are properly cleaned, dried, and profiled and are sound." Many jobs specify the use of heavy-duty grinders, blasters, or scarifiers to remove prior coatings, dirt, oil, films, paints, or sealers. For instance, the CSG15 model from Bosch is a 5-inch (12.7 cm) surface grinder that uses 12.5 amps and 9,300 rpm of power for extra push in surface prep operations. e accom- panying vacuum for the CSG15 is the VAC090A, which is a 9-gallon (34.1 L) dust extractor with an automatic filter cleaner. Diamatic is another company that provides grinders and polishers, while Marco supplies products such as the Vapormaster 6.5 Cu. Ft. (0.2 m³) Abrasive Blasting Pot to deliver a mixture of compressed air, abrasive, and water to a Cementing Success When it's time to apply the system, jobs may require large or hand-held grinders, blasters, or scarifiers to get the proper profile. Again, eliminating dust is important, so companies, such as Bosch, have accompanying vacuums. Cementing Success continued from page 11 "By reducing dust during blasting, the operator has improved visibility at the work site. Typical applications include coating removal, concrete cleaning, concrete repair and restoration, steel tanks, and automotive repair and restoration," said Marco's Cody Lanning.

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