Advances in Durability Performance and Service-life Prediction of Innovative Fibre-Reinforced Polymer (FRP) Bars

混凝土基础设施中钢筋的腐蚀是一个主要的耐久性问题，导致结构退化和随之而来的昂贵维修和丧失使用能力。根据2012年加拿大基础设施报告卡，大量的加拿大市政基础设施处于“一般”和“非常差”之间（平均约35%）。仅在全国范围内替换这些资产就需要1718亿美元。最近受到全球关注的一个相对较新的解决方案是纤维增强聚合物（FRP）钢筋，作为传统钢筋的一种经济有效的替代品。由于其耐腐蚀、重量轻、强度高，FRP筋在加拿大已经使用了20年，用于桥面、停车场和连续人行道等基础设施。缺乏关于长期耐久性的适当数据是玻璃钢筋被广泛接受和大规模实施的主要障碍。

Corrosion of steel reinforcement in concrete infrastructure is a major durability problem, leading to structural degradation and consequent costly repairs and loss of serviceability. According to the 2012 Canadian Infrastructure Report Card, a significant amount of Canadian municipal infrastructure ranks between "fair" and "very poor" (about 35%, on average). Replacing these assets nationally would alone total $171.8 billion. A relatively recent solution receiving global attention is fibre-reinforced-polymer (FRP) reinforcing bars as a cost-effective alternative to conventional steel bars. Given their corrosion resistance, light weight, and high strength, FRP bars have been used in Canada for the last 20 years for infrastructure such bridge decks, parking garages, and continuous pavements. The lack of appropriate data about the long-term durability poses a major obstacle to broader acceptance and mass implementation of FRP bars.