干湿循环–氯盐侵蚀作用下再生骨料混凝土中氯离子传输行为研究

摘要

研究在干湿循环作用下,再生粗骨料取代率、水灰比等因素对于氯离子传输过程的影响,结果表明在不同的再生骨料取代率、水灰比条件下,再生骨料混凝土中的氯离子浓度、表观扩散系数均有明显变化.在干湿循环与氯盐的作用下,再生骨料混凝土的产物为Friedel's盐.%In this paper, the effects of replacement rate of recycled coarse aggregate and watercement ratio on chloride ion transport during dry-wet cycle were studied. The results show that the substitution rate and water-cement ratio of recycled aggregate have obvious effects on the concentration of chloride ion and apparent diffusion coefficient of recycled aggregate concrete in the dry-wet cycle.Under the action of wet and dry cycle and chlorine salt, the product of recycled aggregate concrete is Friedel's salt.