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This paper presents actual performance evaluation findings for various protective lining technologies commonly used for concrete corrosion protection in headspace environments in wastewater collection system and treatment plant applications after a variety of years in service.
This paper presents actual performance evaluation findings for various protective lining technologies commonly used for concrete corrosion protection in headspace environments in wastewater collection system and treatment plant applications after a variety of years in service. The performance of anchored polyvinyl chloride sheet linings, fully bonded PVC Retrofit linings, thick film trowel applied epoxy mortar systems, various spray applied thick film epoxy linings, and spray applied flexible polyurethane linings are discussed and demonstrated.
This case study shows how the City of Virginia Beach addressed concrete tank foundation deterioration and steps taken to reduce future deterioration, including moisture control, impact of Alkali Silica Reaction, concrete analysis and proper surface preparation, coatings applications and inspection.
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Occasionally, the protective coatings on a structure reach a life span of 20 years. Quite often when this happens, one of the companies involved in the project, either the coating supplier or coating applicator, will publish pictures of the bridge or tank in a trade magazine as if the project was a great achievement. If instead, we accept the premise that most of the resins used to manufacture protective coatings easily remain stable for 20 years, we should ask ourselves the question, “why aren’t all of the coating systems lasting 20 years?”
Corrosion control and other organizational-level maintenance on U.S. Navy ships consume significant maintenance dollars and labor resources, while negatively affecting Sailors’ quality of life. The mission of the Preservation Team Initiative is to relieve Ship’s Force from performing selected preservation by utilizing qualified contractors, implementing best commercial engineering and technology practices, and using the most advanced coating systems approved for Navy use.