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- W2334487098 abstract "One of the main causes of structural deficiency in concrete bridges is the deterioration of the constituent materials. In order to achieve the goal of 75-100 year design lives, it is imperative that prestressed elements—girders, piles, and deck panels—contain corrosion-resistant strands. Virginia Department of Transportation (VDOT) has started pursuing carbon fiber reinforced polymers (CFRP) as a corrosion-resistant alternative to steel prestressing materials for longer lasting concrete bridge structures in Virginia. The in-service performance of CFRP rods and cables can be hard to evaluate in certain structural applications, such as prestressed concrete bridges, where instrumentation is often limited and the material cannot be removed for inspection. To implement CFRP in prestressed concrete bridge structures with more confidence, this project was initiated to study issues pertaining to durability under in-service environmental conditions. The main goal was to investigate the effects of temperature with alkaline and alkaline/chloride solutions on material properties over time, in the context of reinforced and prestressed concrete structures. This approach will also help to establish a durability testing methodology for CFRP in concrete structures that can be adopted by VDOT and other laboratories. There were several key findings from the results of this study: (1) higher temperatures accelerate degradation, (2) moisture sorption was the primary process responsible for the observed degradation, with plasticization and microcracking as the controlling mechanisms leading to fiber-matrix interfacial debonding, and (3) a relaxation-based analytical model was implemented to predict residual properties after environmental exposure, showing promising agreement with experimental data." @default.
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- W2334487098 date "2016-01-01" @default.
- W2334487098 modified "2023-09-26" @default.
- W2334487098 title "Durability of Carbon Fiber Reinforced Polymer (CRFP) Strands in a Simulated Concrete Environment" @default.
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