复杂氯盐溶液和冻融循环作用下混凝土的氯离子扩散行为

Chloride diffusion behavior of concrete under complex chloride solution and freeze-thaw cycle

对青海盐湖浸泡1 425 d的普通混凝土(OPC)、高强混凝土(HSC)、高性能混凝土(HPC)、钢纤维增强高性能混凝土(SFRHPC)、高强高弹模聚乙烯纤维增强高性能混凝土(PFRHPC)采用化学分析方法定量分析其氯离子含量。结果表明:普通混凝土结构疏松,氯离子易于进入其中,氯离子含量较多;高强和高性能混凝土结构致密,氯离子不易进入其中,氯离子含量较少。高强和高性能混凝土对氯离子侵蚀有较好的抵抗作用。

We used chemical analysis method for ordinary concrete （OPC）, high strength concrete （HSC）, high performanceconcrete （HPC）, steel fiber reinforced high performance concrete （SFRHPC）, high strength high elastic modulus polyethylenefiber reinforced high performance concrete （PFRHPC）, which are immersed in Qinghai salt lake for 1 425 d, and quantitativelyanalyzed the chloride ion content. The results show that the structure of ordinary concrete is loose, the chloride ion is easy toenter, and the content of chloride ion is high, the structure of high strength and high performance concrete is dense, the chlorideion is not easy to enter, and the content of chloride ion is low. High strength and high performance concrete have betterresistance to chloride ion erosion.