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锈蚀是一个主要的耐久性问题，会导致结构退化，从而导致昂贵的维修费用和可用性的丧失。根据《2012年加拿大基础设施报告卡》，相当数量的加拿大市政基础设施的排名介于“一般”和“非常差”之间(平均约为35%)。仅在全国范围内替换这些资产就将总计1718亿美元。一种受到全球关注的相对较新的解决方案是纤维增强聚合物(FRP)钢筋，它是传统钢筋的一种经济高效的替代方案。由于其耐腐蚀性、轻质和高强度，FRP筋在过去20年里一直在加拿大用于基础设施，如桥面、停车场和连续人行道。缺乏有关长期耐久性的适当数据是更广泛地接受和大规模实施FRP筋的主要障碍。

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.