This paper presents the short-term test results of a durability study on FRP reinforcing bars for concrete structures by accelerated test methods. FRP reinforcing bars were exposed to five different solutions at elevated temperature combined with wetting and drying, and freezing and thawing cycling, which were designed to simulate the accelerated exposure to various adverse conditions in the field. Few FRP bars were also embedded in normal concrete and high performance concrete at elevated temperature and room temperature. The tensile strength and interlaminar shear strength of FRP bars before and after exposure were determined, and considered measures of the durability performance of the specimens. The short-term data indicated that significant strength loss can result from the accelerated exposure of GFRP bars to simulated environments, while CFRP bars display excellent durability. In order to determine the validity of accelerated test method and develop the prediction models for long-term behavior of FRP bars in future study, an Arrhenius analysis was carried out on some of the short-term data.
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