混凝土抗除冰盐的剥落性能与机理研究  

Research on Properties and Mechanism of De-icing Salt Scaling of Concrete

作　　者：缪昌文[1] 刘加平[1] 慕儒[1] 孙伟[2] 

机构地区：[1]江苏省建筑科学研究院,南京市210008 [2]东南大学,南京市210096

出　　处：《公路》2001年第12期88-92,共5页Highway

摘　　要：进行了混凝土在 3.5 %盐溶液中快速冻融的实验研究 ,结果表明盐溶液对混凝土抗冻性的影响具有双重性 ,盐溶液使混凝土试件表面饱和程度提高 ,从而导致其严重剥落 ,重量损失大幅度增加 ,溶液降低冰点的作用使混凝土内部破坏程度较小 ,相对动弹性模量下降略为缓慢。The frost resistance of concrete immersed in 3.5% sodium chloride solution is investigated. According to the experimental results, the sodium chloride solution effected the frost resistance of concrete both positively and negatively. The saturation degree of concrete increased when immersed in solution, which lead to seriously surface scaling and weight loss increased significantly when subjected to freezing and thawing. The freezing point of solution is lower than fresh water, which lead to the inner damage of concrete a little slight, so the decrease of relative dynamic modulus of elasticity exhibited a slightly slow. Based on the experimental results, both the weight loss and relative dynamic modulus of elasticity should be considered when determining the durability factor of concrete.

关 键 词：剥落性能 混凝土 抗冻性 冻融循环 除冰盐 剥落机理 

分 类 号：TU528[建筑科学—建筑技术科学]