CoatingsPro Magazine

SEP 2016

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64 SEPTEMBER 2016 COATINGSPROMAG.COM Long Course e job took place in two phases. e competition pool was tackled first in July 2014, with the job wrapping up in a month. en the instructional pool was done over two weeks in October and November 2014. Pigue used a crew of a project manager, foreman, and four painters to get the work done. On the competition pool, the crew started using 5,000 psi (34.5 MPa) Mi-T-M pressure washers with BE Pressure attachments for the wet blast grit injection. en, the moisture content of the concrete was tested using an electronic non-destructive moisture meter to confirm a proper surface for coating. Next, the crew used a CHLOR*RID testing kit to test for chloride residue, which would interfere with coating adhesion. e test came back positive, which meant they had to use a chloride neutralizer rinse, also by CHLOR*RID. at fixed the problem. Finally, the crew was ready to coat. T hey first put dow n Tnemec Series 201 Epoxoprime primer in a single coat w ith a thickness of 4 to 6 mils (101.6 –152.4 microns). T hen they covered that w ith Tnemec Series 280 Tneme- Glaze finish. T hey put dow n one coat at a thickness of 4 to 6 mils (101.6 – 152.4 microns) for the surfaces that were to remain white and two coats at a total thickness of 8 to 12 mils (203.2–304.8 microns) for those that were black, blue, or orange. With primer and color coats, they had a total system thickness of 8 to 12 mils (203.2–304.8 microns) for white surfaces and 12 to 18 mils (304.8 – 457.2 microns) for colors. Primer and color coats were brush- and roller-applied to the walls and bottom of the pool. For the instructional pool, after it was drained and the extent of the damage was realized, the Vulcan Painters plan was clear: ey would paint it while the swim team practiced in the competition pool, so it was completely contained during blasting to keep blast media, paint, and dust from the public, Pigue said. e crew started by abrasive blasting the shell using an Atlas Copco compressor. is helped to leave a profile and grind pits. en, they followed that with a thorough 6,000-psi (41.4 MPa) pressure water blasting using the Mi-T-M pressure washers with BE Wet Blast grit injection. at was used to remove any remaining paint and dust. Black Max fans by Eagle Industries were used during the blasting portion of the instruc- tional pool to help ventilate the containment, and DeWalt grinders were used to feather pitted spots. As for personal protective equipment (PPE), blast hoods were used during blast- ing, Pigue said. T he crew then tested the moisture content of the concrete using Tramex's CME Xper t II Moisture Meter, an electronic non-destr uctive moisture meter, to conf ir m a proper sur face for coating. T hey again used a CHLOR*RID testing k it to test for chlor ide residue and completed a chlor ide neutra lizer r inse. Next, the crew applied the same system as in the compe- tition pool: Tnemec Series 201 Epoxoprime primer in a single coat with a thickness of 4 to 6 mils (101.6–152.4 microns) and Tnemec Series 280 Tneme-Glaze finish at a thickness of 4 to 6 mils (101.6–152.4 microns) in white and black. Again, the crew applied the primer and colors to the walls and bottom of the pool with brushes and rollers. 3M respirators were used for mixing coatings, and fans and ventilation equipment were used to diffuse paint fumes during brush and roll process. Everything was going swimmingly — until they noticed a problem. False Start W hen the painting on the instructional pool was done, the painters found a 2-foot-by-2-foot (61.0 cm x 61.0 cm) section where the coating bubbled up. "Investigation revealed a crack that was allowing water to leak through the concrete substrate behind the coating," Pigue University Swimming Pools Af ter the pools were power washed and tested, the crew applied Tnemec Series 201 Epoxoprime primer. That was applied in one coat with a thickness of 4 to 6 mils (101.6–152.4 microns). The crew applied Tnemec Series 280 Tneme-Glaze. Onto the white areas they rolled on 4–6 mils (101.6–152.4 microns), and for the colored coatings, they rolled on 8–12 mils (203.2–304.8 microns).

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