CoatingsPro Magazine

JUL 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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36 JULY 2018 COATINGSPROMAG.COM To prep the perimeter and for more detailed work that the main unit could not reach, the crew used 7-inch (17.8 cm) Makita grinders. e Sikafloor-24NA PurCem urethane mortar was used as a patching agent for any imperfections, surface cracks, or divots. Crew members then cleaned the area after surface prepa- ration with brooms and Pullman Ermator high-efficiency particulate air (HEPA) vacuums to keep it as free from dust and concrete residue as possible. Final Four Steps Once the area was prepared, the rest of each five-day "working week " consisted of installing the new system. Generally, the 12 T.W. Hicks workers separated themselves into two six-man crews, each dealing with about half of the ~10,000-square-foot (929.0 m2) working area for that week. Crew members used 250-gallon (946.4 L) containers from Sika to bring materials to each area and set up mixing stations, which helped avoid having to move around too many buckets. "We didn't have thousands of yellow pails to work around and dispose of," Miller said. "It made setting up mixing stations much easier because we didn't have to move around 10 pallets of buckets." He also noted that larger containers were more environmentally conscious. e first step of the crew's "Final Four" was to install the Sikafloor-24NA PurCem urethane mortar bed at an average of ⅛-inch (3.2 mm) thickness, which they did using an 18-inch (45.7 cm) C AM rake. "You set those pins at ⅛ of an inch [3.2 mm] and make sure you're pulling out at that level," Miller said. en, on the following day, the crew would install about 700 linear feet (213.4 m) of integral 8-inch (20.3 cm) cove base along the edges using Sikafloor 217 epoxy resin with Cabot Corp.'s C AB-O-SIL fumed silica added to help it hang vertically and yield ⅛ inches (3.2 mm) of thickness. In all, the crew installed ~10,000 linear feet (3,048.0 m) of cove base around the 14 working areas. "Each step took place on consecutive days because of recoat windows," Miller said. "If you exceed your recoat window, you have to do a light sand in between, and we didn't have the luxury of time to do that." With the mortar bed and cove base taken care of, the second half of the four-day installation period involved the application of two new coatings. e crew first applied the Sikafloor 264 pigmented epoxy at an average thickness of 16 mils (406.4 microns) using a 12-inch (30.5 cm) squeegee, then backrolled with an 18-inch (45.7 cm) roller with a ⅜-inch (9.5 mm) soft woven nap as the cover. With the epoxy still wet, the crew broadcast granite Sikafloor DecoFlake vinyl chips to rejec- tion for aesthetic purposes. "We would have a couple guys mixing and one guy carrying material from the mixing station to the area we're working in and pouring it out," Miller said of each crew member's respon- sibilities during this process. "en we had a couple guys squeegeeing material and others backrolling, then one or two broadcasting flakes if we were in that step." On the final day of each week, the crew sealed up the Each subsequent layer of the horizontal portion of the coating system was applied using a squeegee and then backrolled. Time was tight, so they were sure to watch recoat windows very carefully. The crew applied the mortar at approximately 1 / 8 -inch (3.2 mm) thickness with an 18-inch (45.7 cm) CAM rake. They used the same material as a patching agent for any imperfections, surface cracks, or divots. The coating system is "a heav y-duty broadcast system that offers impact resistance, heav y-load resistance, and chemical resistance," explained Matt Miller, T.W. Hicks' business development manager. That should protect it from 70,000 people and various contaminants. Floor for Entertainment

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