CoatingsPro Magazine

MAY 2015

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 72 of 92

72 MAY 2015 COATINGSPROMAG.COM The final portion to be sprayed was the galvanized 12 gauge steel walls. The crew sprayed ~30 mils (762 microns) on the metal and then laid the fabric into it to adhere together. Although Lewis Concrete has 28 employees, they only needed 12 crew members to work this 8,739-square-foot (812 m 2 ) project, which required eight days to build the containment and two days to spray the coatings. Concrete Repair Institute (ICR I) Concrete Sur face Prof i le (CSP) 3. Ten the crew abrasive blasted using a Clemco abrasive blast pot using medium-sized Black Beauty. After abrasive blast- ing, they did a blow down on the metal to remove any dust. Ten they laid down 12-ounce (340 g) non-woven geotextile fabric made by Hanes Geo Components across screened and sloped pea gravel. "We stretched that out so there was a 1-foot [31 cm] overlap running up the edge of the wall," Hofman said. "W here there were seams in the fabric, we made a 1-foot [31 cm] overlap and tacked it down." After that was done, the crew did a fnal blow of on the walls and cleaned up debris. Ten it was time to spray. All Systems Go Te crew started with Raven 155 waterborne primer on the concrete surfaces to prevent pinholes. Ten they moved on to Raven 512 polyurea, which is a 100 percent solids polyurea coating that can be used in high humidity conditions. It adheres well to concrete, steel, and geo fabric, Hofman said, making it perfect for this job. " W here we ad hered to the concrete f lat str uctures, we star ted to apply the R aven 512 poly urea," Hof f man said. T he crew sprayed under the fabr ic seams and then wou ld lay the fabr ic back over, then they topped the poly urea of f over the seams where they overlapped. T hey used a Graco reactor spray system w ith Graco dump pumps and Graco f usion g un. On t he bot tom side of t he sea ms, t he c rew sprayed a n average of 30 m i l s (762 m ic rons) i n one pa ss. On t he top side, t he y sprayed a n average of 6 0 m i l s (1, 524 m ic rons) a l so i n one pa ss. On t he conc rete f l at work , t he y appl ied t he poly u rea at 35 to 4 0 m i l s (8 89 –1,016 m ic rons) i n one pa ss a nd t hen rol led t he fabr ic up a nd ad hered it to t he conc rete su r face. T hen t he y coated it aga i n "so it 's a l l top side i n a nd monol it h ic," Hof f m a n sa id. T he y a l so coated t he f loor at 6 0 to 70 m i l s (1, 524 –1,778 m ic rons) i n one pa ss. "After we sprayed the foor, the pipe stands, and the concrete, we worked on a 1-inch [2.5 cm] overhang to the wall," Hofman said. "We sprayed 30 mils [762 microns] on the metal itself and then rolled up the fabric to make it a tight bond to VENDOR TEAM 3M Safety equipment manufacturer 3M Center St. Paul, MN 55144 (888) 364-3577 Black Beauty by Harsco Material manufacturer 300 Seven Fields Blvd. Seven Fields, PA 16046 (888) 733-3646 Clemco Industries Corp. Equipment manufacturer One Cable Car Dr. Washington, MO 63090 (636) 239-0300 Graco Inc. Equipment manufacturer 88 11th Ave. NE Minneapolis, MN 55413 (612) 623-6000 Hanes Geo Components by Leggett & Platt Material manufacturer 815 Buxton St. Winston-Salem, NC 27101 (336) 747-1600 Hotsy Cleaning Systems Equipment manufacturer 4275 Northwest Pacific Rim Blvd. Camas, WA 98607 (800) 525-1976 Raven Lining Systems Coatings manufacturer 13105 East 61st St., Suite A Broken Arrow, OK 74012 (800) 324-2810 Sioux Steel Company Material manufacturer P.O. Box 1265 Sioux Falls, SD 57101 (605) 965-4230 www.siouxsecondarycontain- Oilfield Disposal Containment

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