durability index of concrete 混凝土耐久性指标
Study the relation of concrete durability and permeability and point out that we can evaluate concrete durability through the penetrating index.
研究了混凝土耐久性与渗透性的关系，指出可以通过渗透性指标进行混凝土的耐久性评估。
The cracks on concrete Bridges affect the structure durability, and they are also the index that determines the durability state of concrete structures.
混凝土梁体上的裂缝对结构耐久性是有影响的，它也是决定混凝土结构耐久性状态的一个指标。
Taking C30 concrete for example, analysis the durability index of common concrete and co-dope concrete, and proved the engineering application feasibility of fly ash for co-dope concrete.
本文以C 30为例，分析了粉煤灰双掺混凝土和普通混凝土耐久性指数，论证了粉煤灰双掺混凝土工程应用的可行性。
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