-3℃养护条件下矿物掺合料对混凝土性能的影响  

Effect of mineral admixtures on the properties of concrete under the -3℃ curing condition

作　　者：代金鹏[1,2] 王起才[1,2] 李强[2] 王军 

机构地区：[1]兰州交通大学甘肃省道路桥梁与地下工程重点实验室,甘肃兰州730070 [2]兰州交通大学道桥工程灾害防治技术国家地方联合工程实验室,甘肃兰州730070 [3]兰州星锐轨道交通建筑材料有限公司,甘肃兰州730030

出　　处：《铁道科学与工程学报》2017年第10期2124-2129,共6页Journal of Railway Science and Engineering

基　　金：长江学者和创新团队发展计划滚动资助项目(IRT_15R29);国家自然科学基金资助项目(51268032);兰州交通大学优秀科研团队资助项目(201606)

摘　　要：研究-3℃和标准养护条件下,矿物掺合料的掺加对混凝土抗压强度、抗氯离子渗透性及孔结构的影响,对比分析矿物掺合料对混凝土性能的影响规律。试验结果表明:在-3℃条件下养护时,各个龄期掺加矿物掺合料的混凝土强度均低于不掺加的,这与标养条件下的强度增长规律不一致;-3℃养护下矿物掺合料的掺加对混凝土抗氯离子渗透性能有一定程度的改善,也可以细化混凝土的孔结构,但改善效果没有在标养条件下的显著。The effects of mineral admixtures on compressive strength, chloride ion permeability and pore structure of concrete curing under -3 ℃ and standard curing condition were studied. The influence of mineral admixtures on the properties of concrete under the curing condition of -3 ℃ and standard curing condition was analyzed. The results show that: the strength of concrete curing under -3 ℃ in each age period is lower than that of the concrete curing under -3 ℃, which is not consistent with the growth of the strength of concrete under the standard curing condition. In the curing of -3 ℃, the chloride ion penetration resistance of concrete adding mineral admixtures is improved, and mineral admixtures at different ages can refine the pore structure of concrete, but the improvement effect is not significant compared with the standard curing condition.

关 键 词：养护条件 矿物掺合料 抗压强度 抗氯离子渗透 孔结构 

分 类 号：TU528[建筑科学—建筑技术科学]