非饱和混凝土氯离子传输模型及特性分析  

Chloride Transport Model and Properties Analysis of Unsaturated Concrete

作　　者：冯超[1] 於德美[2] 关博文[1] 陈华鑫[1] 申爱琴[2] 

机构地区：[1]长安大学材料科学与工程学院,西安710061 [2]长安大学公路学院,西安710061

出　　处：《硅酸盐通报》2017年第1期8-13,共6页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(51308062;51278059)

摘　　要：根据氯离子在混凝土中的传输机制,考虑干湿交替过程中水分传输的差异,推导得出氯离子在非饱和混凝土中传输的对流-扩散控制方程。试验结果与模型计算结果吻合良好。计算结果表明:自由氯离子浓度随着干湿循环次数的增加而增加,对流区深度、表面氯离子浓度和峰值氯离子浓度随着干湿循环次数的增加而增加并逐渐趋于稳定,根据计算结果回归得出各指标随干湿循环次数的变化方程。According to the chloride ion transmission mechanism,the chloride convection-diffusion control equation in unsaturated concrete was derived by considering the difference of moisture transmission the dry-wet alternate process. The results of model calculation have a good correlation with the measured results. The calculation results show that the free chloride ion concentration with increase with the increase of dry-wet cycles,the convection zone depth,surface chloride ion concentration and peak chlorine ion concentration increases with dry-wet cycles and gradually stabilized. The regression equations of each index were obtained.

关 键 词：非饱和混凝土 氯离子 对流区深度 表面氯离子浓度 

分 类 号：U414[交通运输工程—道路与铁道工程]