CoatingsPro Magazine

MAY 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 64 of 84

64 MAY 2017 COATINGSPROMAG.COM Down Fall? Before going whole hog with the coating, the crew was sure to spray a sample first. is was an important step, as both the primer and topcoat were made of multiple components, meaning that the crew had to confirm that all materials were on ratio before commencing. Once confirmed, though, they got right to work with the primer. Wielding Graco's Reactor E-XP1, one crew member worked to spray the 101 epoxy primer at 8‒12 mils (203.2‒304.8 microns). e goal was "to get good coverage," Bloodworth said. Into the reddish purple primer, two crew members followed to backroll and broadcast coal slag, used to help increase adhesion. Although the primer was "extremely fast" to apply, 6 to 8 grids an hour according to Bloodworth, the priming crew could only apply what could be coated the following day. "By the time the primer dries, you only have 24 hours overcoat window," he explained. Unfor tunately, because of the delay in the project, the crew was now coating dur ing colder and shor ter days. " We shou ld have been spray ing in September when we had longer days and a lot more work hours," Bloodwor th ex plained. "But instead, because of the delay f rom the sludge, and we had to ta ke a shor t brea k bet ween prep and coating for them to do a couple things, we ended up being in mid-November when we star ted spray ing." A lthough the temperatures were colder, they were sti l l acceptable cond itions to apply the sensitive coatings. But the shor ter days of autumn had other implications. T he crew had to wait unti l af ter 10 a.m. before the dew dr ied, and because the pit was so deep, it took longer for the sun to shine on a l l of the sur faces. "Of course, by 5 in the af ter noon, the sun's going dow n and it 's too dark to see in the pit," he lamented. On average, the crew only had around si x or seven hours of time to work each day. For the poly urea, which was applied the day after the primer, the goal had originally been to spray out four grids per After the spent abrasives were recovered, the crew spray applied the primer, Rhino Linings' 101, at 8-12 mils (203.2-304.8 microns). They backrolled that layer and then broadcast slag into it. 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 Bobcat by Doosan Equipment manufacturer 250 E Beaton Dr. West Fargo, ND 58078 (701) 241-8700 Clemco Industries Corp. Equipment and safety equip- ment manufacturer One Cable Car Dr. Washington, MO 63090 (636) 239-0300 Dr. Scholl's by Bayer Consumer Health Equipment manufacturer 100 Bayer Blvd. Whippany, NJ 07981 (866) 360-3226 Equipment Development Co., Inc. Equipment manufacturer 100 Thomas Johnson Dr. Frederick, MD 21702 (800) 638-3326 Graco Inc. Equipment manufacturer 88 11th Ave. NE Minneapolis, MN 55413 (612) 623-6000 Rhino Linings Coatings manufacturer 9747 Businesspark Ave. San Diego, CA 92131 (800) 422-2603 Tyvek by DuPont Safety equipment manufacturer 1007 Market St. Wilmington, DE 19898 (800) 441-7515 Wearing 3M full-face respirators and Ty vek jackets, the crew then applied the polyurea topcoat, Extreme 11-50 polyurea, to achieve a minimum of 125 mils (3,175.0 microns). Cracks were terminated by drilling and filling the hole. Aeration Pond

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