CoatingsPro Magazine

MAR 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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COATINGSPRO MARCH 2018 47 Wearing half-face respirators as required, they shot blasted the accessible areas of the floor with a self-contained machine from Blastrac. For the edges and any other hard-to-reach areas, they used diamond blade dustless grinders from Bosch. e crew got a little help from the arena during this stage, which, according to Frater, supplied them with "all the power we needed "; in this case, that was 60-amp, 3-phase, 208-volt break- ers to power the Blastrac equipment. With the state of some of the concrete, the prep stage took some work. Over the years, the f loors had been patched and were in need of attention. "In some areas, failing concrete had to be removed and patched," Frater said. "Often, you cannot predict the extent of needed repairs until the surface is shot blasted, so day to day, there was patching and fi xing," he continued. e crew vacuumed the floor with shop vacs with high-efficiency particulate air (HEPA) filters to remove dust and any other contaminants. Patching was accomplished using flexible epoxy from Dur-A-Flex on any cracks and joints and the There were two systems used. For the areas with lighter traffic, they used an epoxy system. For areas that needed more protection, areas that might see cars and elephants, they used a cementitious urethane. The crew used shot blasters and grinders to prep the concrete so that the coating could grab onto it. They vacuumed the floors and patched with flexible epoxy and cementitious urethane. JOB AT A GLANCE PROJECT: Install two systems to the concrete floors at an entertainment venue COATINGS CONTRACTOR: O.T. Neighoff & Sons, Inc. 117 Holsum Way Glen Burnie, MD 21060 (410) 766-3000 www.otneighoff.com SIZE OF CONTRACTOR: 30 employees SIZE OF CREW: 5-14 crew members, depending on the task and time PRIME CLIENT: Royal Farms Arena 201 W Baltimore St. Baltimore, MD 21201 (410) 347-2020 www.royalfarmsarena.com SUBSTRATE: Concrete CONDITION OF SUBSTRATE: Good SIZE OF JOB: 109,970 sq. ft. (10,216.5 m²) total DURATION: 12 weeks over the course of one year UNUSUAL FACTORS/CHALLENGES: » The epoxy flake system matched the existing terrazzo floors. » There was constant communication between the crew and facility to determine when they could access the floors. » The project developed from the pedestrian corridors and the perimeter walkways of the first and second floors to all four floors of the facility. MATERIALS/PROCESSES: On the corridors and interior bowl of the first and second floor: » Protected areas with curtains or 1.5-mil (38.1 microns) plastic » Prepped with shot blasters and grinders; vacuumed » Patched with flexible epoxy and cementitious urethane from Dur-A-Flex » Laid down 3 / 16 ths of an inch (0.5 cm) of Poly-Crete SLB using squeegees and 18-inch (45.7 cm) rollers; spike rolled, vacuumed, and buffed » Applied a grout coat, Dur-A-Glaze #4 Water Clear, at 75-80 square feet (7.0-7.4 m²) per gallon (3.8 L); mechanically ground and vacuumed » Applied Armor Top satin with an aluminum oxide grit or nonslip additive at ~600 square feet (55.7 m²) per kit On the top three floors: » Squeegeed and rolled two layers of Dur-A-Glaze #4 Regular at ~100 square feet (9.3 m²) per gallon (3.8 L); broadcast vinyl flake to rejection and vacuumed excess » Buffed and applied a grout coat at 75-80 square feet (7.0-7.4 m²) per gallon (3.8 L); sanded and vacuumed » Applied Armor Top satin with a nonslip aggregate at ~600 square feet (55.7 m²) per kit SAFETY CONSIDERATIONS: » Wore respirators, knee pads, spiked shoes, and gloves, as required

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