混凝土保护层厚度与结构设计使用年限

Concrete cover thickness and the using period of structure design

混凝土碳化与钢筋锈蚀是影响结构耐久性的重要原因,混凝土保护层厚度与混凝土碳化直接相关,也是影响钢筋锈蚀速度的主要因素。本文依据碳化模型计算了50年混凝土碳化深度,与混凝土保护层厚度作比较。并提出规范改进意见,供规范编制参考。

Concrete carbonization and corrosion of the reinforcement are important reasons that diminish the durability of structure. Concrete cover thickness is directly related to concrete carbonation, and influences the corrosion velocity of reinforcement. It calculates the carbonization depth of concrete in fifty years, compares to the concrete cover thickness, and provides advice to improve the durability, when drafting the design code of concrete cover thickness, this paper can serve as a reference.