氯盐环境下开裂混凝土耐久性研究进展

摘要

To reveal the influence of crack on durability of reinforced concrete structure under chloride environment ,authors analyzed the change rules about durability of concrete with load cracks ,non‐load cracks and artificial cracks by combining the existed references .T he effects of crack type (artificial or natural crack ) ,width ,depth and distance on concrete durability w hich contains penetrability ,chloride ingression and steel corrosion were pointed out . The models about chloride ion transportation in cracked concrete under saturated and unsaturated state were also introduced .The basic conclusions and key points needed in further study were finally put forward .The obtained results can be served as references for the future research on durability of cracked concretes under chloride environment .%为了明确裂缝对氯盐环境下钢筋混凝土结构耐久性的影响，结合已有文献分析了荷载裂缝、非荷载裂缝及预制裂缝下混凝土结构在氯盐环境下的耐久性变化规律，指出了裂缝形式（人工裂缝、自然裂缝）、宽度、深度、间距等参数对混凝土渗透性及氯离子传输、内部钢筋锈蚀的影响规律，介绍了已有的饱和与非饱和状态下开裂混凝土内氯离子传输过程的模型，指出了氯盐环境下开裂混凝土耐久性研究已得出的基本结论及需要深入研究的方面。所得结论可为氯盐环境下开裂混凝土的后期研究提供借鉴。