干湿循环条件下早龄期混凝土氯离子扩散系数研究

Research on chloride ion diffusion coefficient in early age concrete under dry-wet cycles

通过开展干湿循环条件下混凝土受氯离子侵蚀的试验,对比了标准养护的试件,分析了氯离子的扩散系数,并研究了混凝土的早期抗氯离子侵蚀能力,试验结果表明,干湿循环条件下,混凝土氯离子扩散系数明显升高,抗氯离子侵蚀能力大大降低,特别是在早龄期,差异较大。

The chloride ion erosion resistance of early age concrete has been studied by chloride erosion experiment under dry-wet cycles,the analysis of chloride ion diffusion coefficient with standard curing specimen. The experiment results show that the chloride ion diffusion coefficient increased significantly and the chloride ion erosion resistance is greatly reduced,especially in the early age,the difference is bigger.