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Abstract:Modifications to design standards, material specifications, construction methods, and roadway
maintenance practices are believed to be major contributing causes for the observed premature
deterioration of Michigan’s Portland cement concrete bridge railings and barriers.
This study documents the history of Michigan’s barrier design configurations, provides a
synopsis of typical modes of deterioration, and finally, provides recommendations intended to
address improvements to the long-term performance of concrete barriers exposed to Michigan’s
harsh environments.
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