Oxygen Diffusion Characterization of Fiber Reinforced Polymers

纤维增强聚合物的氧扩散表征

• 批准号: 0409401
• 负责人: Rajan Sen
• 金额: --
• 依托单位: University of South Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-06-01 至 2010-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0409401&HistoricalAwards=false
• 关键词: Oxygen; Diffusion; Characterization; Fiber; Reinforced

Oxygen Diffusion Characterization of Fiber Reinforced Polymers Investigator: Rajan Sen [e-mail] (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.

纤维增强聚合物的氧扩散表征研究员：Rajan Sen [e-mail]（首席研究员）Venkat R. Bhethanabotla（联合首席研究员）外粘合纤维增强聚合物 (FRP) 广泛用于混凝土结构的修复和修复。当 FRP 材料粘合到混凝土表面时，它会自动充当有害物质的屏障，防止可能导致钢筋腐蚀的有害物质。本研究将进行实验和理论研究，以表征与氧侵入相关的 FRP 微观结构，这是一个对于维持钢的电化学腐蚀至关重要的参数。本研究的目的是：（1）进行扩散测试，以确定纤维结构在防止氧侵入方面的作用； (2) 对混凝土试件进行有限的验证扩散试验； (3) 对纤维-基体界面进行详细研究，(4) 开发适当的数值模型来扩展实验研究的结果。预计结果将提供有关修复腐蚀损坏混凝土结构最有效的纤维结构的信息。