摘要
研究了4种混凝土干湿循环次数与氯离子扩散系数的关系.通过测定各混凝土在盐湖卤水-干湿循环环境下的氯离子含量,应用三维扩散理论模型计算氯离子扩散系数.结果表明:各混凝土的氯离子扩散系数(Dcx)与干湿循环次数呈幂指数函数关系,Dcx值与干湿循环次数、粉煤灰和矿渣的掺量呈正相关关系;与硅灰的掺量呈负相关关系.
The relationship between wet-dry cycles and chloride diffusion coefficient was investigated by using four different concretes. Chloride diffusion coefficient was estimated by applying the model of three-dimensional diffusion with the chloride contents of the concrete at different wet-dry cycles. The re sult showed that there existed the positive power function relation between the chloride diffusion Coeffi cient of concrete （Dcx） with wet-dry cycles, the value of Dcx had a typical positive correlation with wet-dry cycles, fly ash or slag addition amount, and the content of silica fumes was negatively correlated with it.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2014年第3期26-30,共5页
Journal of Hunan University:Natural Sciences
基金
国家重点基础研究发展计划('973'计划)项目(2009CB623203)
国家自然科学基金资助项目(51178221)
