Highly accelerated lifetime for externally applied bond critical fiber-reinforced polymer (FRP) infrastructure materials : [summary].
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2014-03-01
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Abstract:The Florida Department of Transportation (FDOT) uses fiber-reinforced polymer (FRP) composites to repair bridges and strengthen bridge decks. Proven mechanical characteristics make FRP composites cost-effective in extending the life span of bridges or improving their functionality. However, despite confidence in the application of FRP composites, how they will perform over the 50-year-plus lifespan of a bridge cannot be known in advance; instead, this must be predicted, usually through tests that accelerate aging of composites using elevated temperatures, stress levels, and concentrations of corrosive media. While standardized, these tests generally do not take into account the fundamental science of the cement/FRP/epoxy system. In this project, University of Florida researchers investigated the underlying chemical and physical processes of epoxy-cement bonding and FRP degradation to provide a basis for designing better and more predictive conditioning protocols.
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