冻融损伤对混凝土氯离子扩散性能的影响  

Damage caused by freeze-thaw cycles influencing on chloride diffusion of concrete

作　　者：洪锦祥[1] 缪昌文[1] 黄卫[2] 

机构地区：[1]江苏省建筑科学研究院,江苏南京20008 [2]东南大学交通学院,江苏南京210096

出　　处：《混凝土》2006年第1期36-38,共3页Concrete

基　　金：江苏省自然科学基金项目(BK2004155)

摘　　要：通过自由氯离子滴定试验和氯离子扩散深度试验研究了冻融损伤对混凝土氯离子扩散性能的影响。结果表明，冻融损伤对混凝土氯离子扩散性能的影响是显著的。当混凝土的损伤为24％时，其氯离子扩散系数和扩散深度分别是未损伤混凝土的6．5倍和2倍，混凝土结构的使用寿命将会缩短75％～85％。回归分析结果表明。混凝土的损伤与氯离子扩散系数、扩散深度之间均可以建立良好的非线性关系。The influence of damage caused by freeze-thaw cycles on the performance of chloride diffusion of concrete is studied by the experiments of free chloride concentration titration and chloride diffusion depth. The results show ir is notable that the damage affects on the chloride diffusion of concrete. When the damage degree of concrete is 24 %, the coefficient and depth of chloride diffusion of concrete is 6.5 and 2 times of undamaged concrete, respectively; And the service life of concrete structure would shorten 75 % - 85 %. Furthermore, the regression analysis result shows that the nonlinear relationship between damage and coefficient or depth of chloride diffusion can be estabIished well.

关 键 词：冻融 损伤 氯离子扩散系数 氯离子扩散深度 

分 类 号：TU528.32[建筑科学—建筑技术科学]