Oxygen Diffusion Characterization of Fiber Reinforced Polymers

纤维增强聚合物的氧扩散特性研究员：Rajan Sen sen@eng.usf.edu （主要研究者） 文卡特河Bhethanabotla（联合首席研究员）外部粘结纤维增强聚合物（FRP）被广泛用于混凝土结构的修复和恢复。由于FRP材料与混凝土表面结合，它自动充当有害材料的屏障，这些有害材料可能导致钢筋腐蚀。本研究将进行实验和理论研究，以表征与氧侵入有关的FRP微结构，这是一个对维持钢的电化学腐蚀至关重要的参数，本研究的目标是：（1）进行扩散试验，以确定纤维结构在防止氧侵入中的作用;（2）对混凝土试样进行有限的确证扩散试验;（3）对纤维-基体界面进行详细的研究;（4）建立适当的数值模型，以扩展实验研究的结果。结果预计将提供信息的纤维结构，是最有效的修复腐蚀损坏的混凝土结构。

Oxygen Diffusion Characterization of Fiber Reinforced Polymers Investigator: Rajan Sen sen@eng.usf.edu (Principal Investigator) Venkat R. Bhethanabotla (Co-Principal Investigator)Externally bonded fiber reinforced polymers (FRP) are widely used for the repair and rehabilitation of concrete structures. As the FRP material is bonded to the concrete surface, it automatically acts as a barrier to deleterious materials that can cause reinforcing steel to corrode. This study will undertake experimental and theoretical investigations to characterize FRP micro-structure relating to oxygen ingress, a parameter that is critically important for sustaining electrochemical corrosion of steel.The objectives of this research are to: (1) conduct diffusion tests to establish the role of fiber architecture in preventing oxygen ingress; (2) conduct limited corroborative diffusion tests on concrete specimens; (3) conduct a detailed investigation of the fiber-matrix interface and (4) develop appropriate numerical models to extend the findings from the experimental studies. Results are expected to provide information on fiber architecture that is most effective for repairing corrosion-damaged concrete structures.