非稳态快速电迁移试验方法测试混凝土氯离子扩散系数变化规律及相关性研究  

Changes Law and Correlation Research on Chloride Ion Diffusion Coefficient of Concrete by RCM

作　　者：李超[1] 李士伟[1] 周毅 杨海成[1] 王迎飞[1] 

机构地区：[1]中交四航工程研究院有限公司,广东广州510230 [2]山东高速青岛公路有限公司,山东青岛266061

出　　处：《施工技术》2013年第18期58-61,共4页Construction Technology

基　　金：国家科技支撑计划项目资助(2011BAG07B04)

摘　　要：[摘要]通过对比恒电压和变电压非稳态快速电迁移（RCM）测试的2种常用试验方法，明确了2种方法在试验过程中存在的差异。并利用这2种试验方法研究了不同类型混凝土的氯离子扩散系数变化规律，发现由2种方法得到的氯离子扩散系数随龄期衰减的规律均可用幂函数关系进行描述。通过相关性研究，发现这2种试验方法测试结果为线性相关，且变电压RCM测试结果是恒电压RCM测试结果的1．27—1．30倍。By comparing the two common test methods of constant voltage RCM and variable vohage RCM, their differences during the testing procedure were identified. Using these two testing methods, the change laws of diffusion coefficient for chloride ion in different types concrete was studied. It was found that the attenuation of the diffusion coefficients with the concrete age obtained from both methods could be described by a power function. Study on the relationship between the results from the two testing methods show that they are in linear correlation and the result from variable voltage RCM is 1.27 - 1.32 times of that from constant voltage RCM.

关 键 词：混凝土 氯离子 扩散系数 衰减系数 试验 

分 类 号：TU528.01[建筑科学—建筑技术科学]