混凝土中氯离子扩散数值研究  

Numerical research on the diffusion of chloride ions in concrete

作　　者：刘莹[1] 蔺石柱[1] 董振华[1] 张鸿雁[1] 

机构地区：[1]内蒙古科技大学建筑与土木工程学院,内蒙古包头014010

出　　处：《内蒙古科技大学学报》2009年第4期369-373,共5页Journal of Inner Mongolia University of Science and Technology

摘　　要：针对混凝土氯离子扩散系数以及表面氯离子浓度受时间效应的影响,采用COMSLOL有限元软件对氯离子扩散过程进行数值模拟,将预测结果与实测试验结果相比较,验证该方法是一种有效的氯离子扩散分析方法.考虑实际环境中氯离子扩散受时间因素及不同氯侵蚀环境因素影响,分别对不同水灰比及不同龄期下的混凝土氯离子扩散进行模拟,为分析近海和除冰盐环境下结构混凝土中氯离子浓度分布提出了一种新的预测方法.The concrete′s chloride ion diffusion coefficient and the concentration of surface chloride ion′s change with time.Therefore,the COMSLOL finite element software was used to carry out the numerical simulation for diffusion process of chloride ions,and the forecasted outcome was compared with the test results,which shows that the method is effective for diffusion analysis of the chloride ions.In the actual environment,the proliferation of chloride ions was affected by the time factor,then chloride ion diffusion of the concrete was done with numerical simulation under different water-cement ratio and different age respectively,leading to a new forecasting method to analyze the distribution of the chloride ion concentration of the concrete structure under coastal and de-icing salt circumstances.

关 键 词：氯离子扩散系数 数值模拟 Fick第二扩散定律 

分 类 号：TU528.01[建筑科学—建筑技术科学]