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Title: Demonstration of a liquid-applied liner system for corrosion protection and rehabilitation of wastewater system structures : Final report on Project F11-AR24
Authors: Mandaree Enterprise Corporation.
United States. Office of the Under Secretary of Defense for Acquisition, Technology, and Logistics.
DoD Corrosion Prevention and Control Program (U.S.)
Wilson, Clint A.
Drozdz, Susan A.
Mathis, Jaclyn S.
Clark, Larry.
Olaes, Christopher.
Keywords: Corrosion prevention program
Protective liner system
Fort Bragg (N.C.)
Masonry—service life
Concrete—service life
Corrosion and anti-corrosives testing
Protective coatings
Microbiologically influenced corrosion
Sewage disposal plants
Publisher: Construction Engineering Research Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Description: Technical Report
Abstract: Concrete and masonry structures in Department of Defense (DoD) wastewater collection and treatment systems severely corrode over time. Causes include biologically generated sulfuric acid, and are often related to microbially induced concrete corrosion (MICC). This report describes the demonstration of an emerging technology that uses a silicone-modified polyurea compound and closed-cell foam to line deteriorating structures, creating a barrier that is highly resistant to corrosive effluents. At the demonstration site, Fort Bragg, NC, the patented “stress-skin liner” system was applied to one wastewater lift station and eleven manholes. The technology was applied by licensed contractors without problem, and visual inspection by a third-party contractor confirmed that the quality and condition of the coatings was good. Because no destructive coating-adhesion testing was permitted inside the structures, concrete and masonry coupons were coated with polyurea and tested twice: once at time zero and once after 12 months. Initial coating adhesion was good, but adhesion after exposure was significantly reduced where coating edges were near to uncoated substrate that was continually wetted by sewage. Coating quality after 12 months was confirmed by visual inspection. The project return on investment (ROI) is 1.00; an alternate ROI calculated without research first costs is 5.5.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Report

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