Parametric Evaluation of Accelerated Aging Techniques for Fiber Composite Reinforcements for Structural Concrete

*9625820波特该项目解决了有关纤维复合材料(FC)材料的短期和长期腐蚀和老化特性的几个重要问题。这些类型的材料非常适合用于海洋环境中的钢筋和预应力筋，以及其他民用和军用基础设施用途。这些材料显示出巨大的前景，因为它们是非金属的，因此被认为通常不会出现钢铁容易受到腐蚀的问题。研究的目标包括检验各种拟用于钢筋和预应力筋的FC材料的承载和强度损失特性，以及使用长玻璃纤维股和芳纶或碳纤维嵌入乙烯基酯或环氧基的预应力筋和使用加速老化的分析技术。爱荷华州立大学目前使用的加速老化技术在预测FC材料的长期耐久性方面显示出巨大的前景。这项研究将评估加速老化过程本身、最新和最高性能的候选FC材料，以及FC-碱性化学反应。

*** 9625820 Porter This project addresses several important issues regarding the short-term and long-term corrosion and aging characteristics of fiber composite (FC) materials. These types of materials are excellent candidates for rebars and prestressing tendons in marine environments, and other civilian and military infrastructure uses. These materials show great promise because they are non-metallic and therefore are believed to be generally free of the corrosive problems to which steel has been susceptible. The objectives of the research involve examining the load- carrying and strength loss characteristics of a variety of proposed FC material that have intended applications in the reinforcing bar and prestressing tendon uses FC reinforcing bars and prestressing tendons constructed using long-fiber glass strands and aramid or carbon-fibers embedded in a vinyl ester or epoxy matrix will be examined using analytical techniques for accelerated aging. The accelerated aging technique currently used at Iowa State University has shown great promise in predicting the long-term durability of FC materials. This research will evaluate the accelerated aging process itself, the most recent and highest-performance candidate FC materials, and FC-alkaline chemical reactions in general.***