Corgill Construction, of Hackett, Arkansas, has been serving municipalities, professional engineering firms and contractors for five years, specializing in manhole rehabilitation and leak locating of sewer lines.
City of Springdale
Date of Project:
Type of Structure(s):
25 brick/precast wastewater manholes
Condition of Structure(s):
The condition of the 25 manholes was very poor with severe deterioration resulting in infiltration of ground water and structural instability.
Description of Application:
Beginning in mid-2015, Corgill Construction, a Raven Certified Applicator, rehabilitated more than 25 manholes that had been deteriorating severely.
After cleaning and preparing the surface of the manholes, Corgill spray-applied a cementitious product to repair the lost substrate. Once the cement was allowed to cure and prepare, a 100% solids epoxy primer, the Raven 171, was applied to reduce the amount of off-gassing that could result in pinholes/holidays through the top coat. Raven 405, a 100% solids, ultra-high-build epoxy protective coating, was then applied at 125 mils thick to provide further structural reinforcement and corrosion protection.