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Mitigation Techniques for In-Service Structures with Premature Concrete Deterioration: Synthesis Report

This report is a synthesis of the technical results of Texas Department of Transportation Study 4069 ("Mitigation Techniques for In-Service Structures with Premature Concrete Deterioration"). The Texas Department of Transportation is interested in developing techniques for mitigating or remediating premature concrete deterioration due to alkali-silica reaction (ASR), delayed ettringite formation (DEF), or both, in order to extend the life of potentially affected structures. Reports 4069-1 and 4069-2 consist, respectively, of a literature survey and an application of existing test methods to assess the comparative effectiveness of mitigation treatments for premature concrete deterioration. This report (Report 4069-3) describes the development and verification of a new test method, and the application of that test method to recommendations for specific treatments to mitigate premature concrete deterioration from ASR/DEF.