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

结构混凝土纤维复合材料加速老化技术的参数评估

• 批准号: 9625820
• 负责人: Max Porter
• 金额: $ 25.43万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-09-01 至 2000-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9625820&HistoricalAwards=false
• 关键词: Parametric; Evaluation; Accelerated; Aging; Techniques

*** 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.***

* 9625820 Porter该项目解决了有关纤维复合材料（FC）的短期和长期腐蚀和老化特性的几个重要问题。 这些类型的材料是海洋环境中钢筋和预应力筋以及其他民用和军用基础设施用途的优秀候选材料。 这些材料显示出很大的前景，因为它们是非金属的，因此被认为通常没有钢容易受到的腐蚀问题。 本研究的目的包括检查各种拟议的FC材料的承载和强度损失特性，这些材料在钢筋和预应力筋中具有预期的应用，使用FC钢筋和预应力筋，使用长纤维玻璃钢绞线和芳纶或碳纤维嵌入乙烯基酯或环氧树脂基质，将使用加速老化分析技术进行检查。 爱荷华州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很大的前景。 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。