再生混凝土中氯离子渗透性能试验研究  

Experimental Study on Chloride Ion Penetration into Recycled Aggregate Concrete

作　　者：吴相豪[1] 岳鹏君[1] 

机构地区：[1]上海海事大学海洋环境与工程学院,上海201306

出　　处：《建筑材料学报》2011年第3期381-384,417,共5页Journal of Building Materials

基　　金：上海海事大学科研基金项目(20100073);上海海事大学重点学科建设项目(A2010030);上海市本科教育高地建设项目(B210008G)

摘　　要：通过氯离子自然扩散试验,测定再生混凝土试件中的氯离子浓度,分析了再生骨料、粉煤灰掺量、全浸泡与干湿循环方式对再生混凝土中氯离子渗透性能的影响.结果表明:再生混凝土抗氯离子渗透能力比普通混凝土差;掺入粉煤灰能提高再生混凝土抗氯离子渗透能力,粉煤灰最佳掺量为20%(质量分数);干湿循环方式可加快再生混凝土中氯离子的渗透速度.In order to investigate the effects of recycled concrete aggregate,wet and dry cycles,fly ash replacement on chloride ion penetration of recycled aggregate concrete,the chloride ion concentration in recycled aggregate concrete was measured during chloride natural diffusion test.The results show that the ability to resist chloride ion penetrate into recycled aggregate concrete is weaker than that for natural aggregate concrete;the resistance to chloride ion penetration into recycled aggregate concrete can be improved by replacing cement with fly ash,20%（by mass） replacement of cement with fly ash is optimum;the rate of chloride ion penetration into recycled aggregate concrete under wet and dry cycles is higher than that into saturated recycled aggregate concrete.

关 键 词：再生混凝土 氯离子 渗透 干湿循环 粉煤灰 

分 类 号：TU528.01[建筑科学—建筑技术科学]