Projects | Rehabilitation
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Pre-Acidification Tank – Golden, CO

COATINGS

UMC recently completed the interior coating of a 55 ft. x 44 ft. bolted steel tank with approximately 5 mils of spray-applied epoxy primer and approximately 80 mils of spray-applied polyurea topcoat. The tank was experiencing severe corrosion on the center support column, the upper tank walls, and the roof beams. The complete interior of the tank had to be wet- abrasive blasted in order to remove any existing rust or corrosion. This also provided us with the proper profile to ensure that the coating would bond properly to the steel substrate. UMC removed the existing support column and roof beams and replaced them with new beams that we coated off-site prior to beginning the project. After the roof of the tank was coated and the beams were installed, we completed the coating of the walls and the floor of the tank. UMC had to overcome several obstacles in the completion of the tank, including having to race the November weather in order to beat the Colorado freeze due to the sensitive nature of the tank contents. Another challenge was containing the copper slag blast material that was used to the inside of the tank in order to avoid any negative impact on the environment. Safety and quality are of utmost importance here at UMC, and we took every step possible to provide a high quality project that was completed on a tight schedule and without incident.


City of Wichita Treatment Plant 2 Headworks Improvements – Wichita, KS

REHABILITATION

The City of Wichita Public Works and Utilities was experiencing severe erosion in three separate concrete structures at their wastewater treatment facility totaling approximately 5,600 interior square feet. The level of erosion was to the point that, if left untreated, it would jeopardize the structural integrity of the concrete. UMC was called upon by the prime contractor, Dondlinger Construction, to patch and coat the interior of the structures with a four-step cementitious and epoxy coating system that is specifically designed to be highly abrasion resistant. After the concrete surfaces were prepped with abrasive blasting and high-pressure washing, the areas that experienced the highest amounts of erosion were built-back to the original wall dimensions using a cementitious patching material. In addition to the patching, one of the structures had two areas with active ground water leaks that had to be fixed in order for the coating system to be applied properly.  After the leaks were stopped and the cementitious build-back was complete, the next three epoxy coats were hand-applied to create a monolithic epoxy coating that is highly chemical and erosion-resistant. What made this project particularly challenging was that UMC had to complete the work on a very tight schedule due to the city’s high daily cost of bypass pumping that was required to allow UMC to enter the structures. Another challenge was accessing the areas to be coated due to the fact that the structures were 20-30 feet below grade.  As always, safety was UMC’s top priority on this project and the work was completed without incident.


Containment Wall Rehabilitation – Wichita, KS

REHABILITATION

Through a relationship with a local concrete contractor UMC was made aware of some concrete corrosion at one of Wichita's processing facilities. The damage was described as chemical corrosion of concrete containment walls around two chemical tanks. Once a site visit was conducted it was determined that 100% solids epoxy and a mortar build-back material would be an adequate solution. The mortar was used to build-back the profile of the concrete walls where the corrosion was the most severe. With the possibility of more exposure to chemicals 100% solids epoxy was used to topcoat all repaired surfaced.