Exhibitor Promotion
Presented by Sherwin-Williams
Staying on schedule was critical when the City of Grand Forks, N.D., built its new Grand Forks Regional Water Treatment Plant. That’s why project managers made strategic coating selections that removed days from various plant projects. It’s also why they worked with Sherwin-Williams Protective & Marine to ensure timely service and coating deliveries.
With efficiency in mind, the team shifted its specification from a five- to six-coat lining system to a one-coat system to line five membrane bioreactor (MBR) basins. That move alone saved applicators at least an entire day per basin. Other efficiencies ultimately saved them more than two weeks on the project.
The originally specified system — a concrete resurfacer, moisture barrier, epoxy base coat, fiberglass mat and epoxy topcoat — would have required about three days to line each roughly 25-foot-wide by 30-foot-long basin. Using Poly-Cote™ 115 from Sherwin-Williams instead, the basins could be ready for service in less than two days. The 100 percent solids, elastomeric polyurethane’s optimal build properties enabled applicators to spray it at the same thickness as the five- to six-coat system in a single pass.
To line the basins, applicators from Champion Coatings first sandblasted the concrete and then applied Dura-Plate® 2300. This epoxy-modified cementitious resurfacer filled in imperfections in the concrete and created a durable surface with excellent adhesion for the lining system. Further ensuring adhesion, applicators next applied a primer coat of Dura-Plate 235 as a barrier to prevent moisture and air from escaping the concrete and creating pinholes in the lining. Due to the fast return-to-service time for Dura-Plate 2300, as well as no need to complete a sweep blast on the resurfacer before coating it, Champion Coatings could complete the resurfacing and primer applications on the same day.
