三峡工程大坝混凝土长龄期耐久性能试验研究

混凝土的耐久性能直接影响混凝土结构的使用寿命。本文通过对三峡工程大坝混凝土进行龄期长达10年的耐久性能试验研究，分析了混凝土抗冻性能、抗渗性能以及混凝土碳化深度，抗冻性能随龄期的变化规律，不同养护条件对混凝土耐久性能随龄期发展规律的影响。研究表明，自然养护对混凝土长龄期耐久性能不利。研究结论可为长期工作条件下大坝混凝土的真实性能和结构安全性评价提供参考。

Experimental study on durability of dam concrete in the Three Gorges Project

The durability of concrete directly affects the service life of concrete structures. Through 10 years of experimental study on durability of concrete in Three Gorges dam,this paper analyzes the frost re-sistance,impermeability of concrete,and variation of the frost resistance and carbonation depth with con-crete age changing,effects of different curing conditions on the durability of the concrete with age chang-ing, which shows that the natural curing is detrimental for the durability of long age concrete. The re-search results can be a reference for the real performance and structural safety evaluation of long-term working conditions of dam concrete.