荷载裂缝对混凝土氯离子扩散的影响

Influence of loading cracking on chloride ions diffusion in concrete

水泥基材料中介质的传输非常复杂。首先采用施加劈裂荷载方式诱导裂缝,然后采用图像分析技术对裂缝进行表征,利用氯盐溶液自然浸泡法研究表面单个裂缝对混凝土材料中氯离子传输性能的影响,结果表明裂缝的存在加强了氯离子在混凝土中的传输,并且氯离子扩散随着裂缝宽度的增加而增加。

Transport in cement-based materials is very complicated.Influence of cracking on chloride ions diffusion has been studied through immersing method.Cracking was introduced by splitting loading,and cracking width was measured through image analysis technology.It was found that cracking could accelerate the chloride-ion migration,and the chloride ions diffusion coefficient increases with the increasing crack width.