三重因素作用下矿渣混凝土抗氯离子侵蚀性能研究  

Research on Resistance of GGBS Concrete to Chloride Erosion Under Three Factors

作　　者：宋鲁光 宋杨[1,2] 王海 SONG Luguang;SONG Yang;WANG Hai(School of Architectural and Civil Engineering,Changzhou Institute of Technology,Changzhou 213032;Changzhou Key Lab of Construction Engineering Structure and Material Properties,Changzhou 213032)

机构地区：[1]常州工学院土木建筑工程学院,江苏常州213032 [2]常州市建设工程结构与材料性能研究重点实验室,江苏常州213032

出　　处：《常州工学院学报》2021年第1期12-15,共4页Journal of Changzhou Institute of Technology

基　　金：江苏省自然科学基金项目(BK20170293);常州工学院校级科研基金项目(YN1708);常州工学院大学生创新创业训练计划项目(2019099)。

摘　　要：利用自然浸泡法研究了持续荷载—干湿循环—氯盐三重因素耦合作用下矿渣混凝土的抗氯离子侵蚀性能。结果表明,在三重因素作用下,掺加矿渣的混凝土各深度的自由氯离子含量均小于未掺加矿渣混凝土的。掺加矿渣混凝土的表观扩散系数小于未掺加矿渣混凝土的,未掺加矿渣混凝土的表观扩散系数为掺加矿渣各组混凝土表观扩散系数的2~3.5倍。掺量为60%组的混凝土表观扩散系数最小。随着浸泡时间的延长,各矿渣掺量混凝土的表观扩散系数逐渐减小。表观扩散系数随矿渣掺量的增多先降低而后增大。当矿渣掺量为52%时,表观扩散系数取得最小值。Natural soaking method was used to investigate resistance of GGBS concrete to chloride erosion under the influence of three factors-sustained loading,wetting-drying cycles and NaCl solution.The results show that the free chloride concentration of the concrete mixed with GGBS is lower than that of the concrete without GGBS.The apparent diffusion coefficient of concrete with GGBS is lower than that of concrete without GGBS,and the apparent diffusion coefficient of concrete without GGBS is 2~3.5 times of that with GGBS.The concrete with 60%GGBS has the lowest apparent diffusion coefficient.With the extension of soaking time the apparent diffusion coefficient of each sample decreases.The apparent diffusion coefficient first decreases,and then increases with the increase of slag content When the slag content is 52%,the apparent diffusion coefficient has the minimum value.

关 键 词：矿渣混凝土 表观扩散系数 矿渣掺量 干湿循环 持续荷载 

分 类 号：TU528[建筑科学—建筑技术科学]