基于盐水浸泡法混凝土氯离子渗透深度控制值试验研究  

Experimental Study on Chloride Ion Penetration Depth of Concrete Based on Salt Water Immersion Method

作　　者：朱炳喜 胡明凯 李琳 王琰 居强 朱维 王康 

机构地区：[1]江苏省水利科学研究院,江苏扬州225002 [2]江苏省水利建设工程有限公司,江苏扬州225002

出　　处：《混凝土世界》2022年第9期30-33,共4页China Concrete

基　　金：江苏省水利科技基金项目(2013018,2015029,2018013);南京市水利科技基金项目(2017007)

摘　　要：基于高浓度盐水自然浸泡法、RCM氯离子扩散系数测试法,研究了16.5%盐溶液浸泡35d氯离子渗透深度与扩散系数之间的相关性,结果表明,两者之间显著相关,相关系数为0.893;推荐了氯化物环境设计使用年限为100年和50年的混凝土16.5%盐水浸泡35d氯离子渗透深度控制值。研究了混凝土水胶比与氯离子扩散系数之间的相关性,结果表明,两者之间显著相关,相关系数为0.842。根据氯离子渗透深度与扩散系数、水胶比与扩散系数之间相关关系,建立了水胶比与氯离子渗透深度之间关系式,推荐了氯化物环境混凝土最大水胶比控制值。Based on natural immersion method of high concentration brine and RCM chloride ion diffusion coefficient test method,the correlation between the permeation depth and diffusion coefficient of chloride ion in 16.5%salt solution for 35 days was studied.The results showed that the correlation coefficient was 0.893.The control value of chloride ion penetration depth of concrete immersed in 16.5%salt water for 35 days is recommended for the design service life of chloride environment of 100 and 50 years.The correlation between water-binder ratio and chloride diffusion coefficient of concrete was studied.The results showed that the correlation coefficient was 0.842.Based on the relationship between the penetration depth and diffusion coefficient of chloride ion,the relationship between the water-binder ratio and the penetration depth of chloride ion was established,the control value of maximum water-binder ratio of concrete in chloride environment is recommended.

关 键 词：自然浸泡 氯离子扩散系数 氯离子渗透深度 相关性 

分 类 号：TU528[建筑科学—建筑技术科学]