不同水灰比下矿渣硅灰复合矿物掺合料火山灰效应试验研究  

Pozzolanic effect of composite mineral admixture under different water cement ratio

作　　者：郭玉柱[1] 王起才[1,2] 王云天[1] 谢松林[1] 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070 [2]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

出　　处：《混凝土》2017年第8期42-45,51,共5页Concrete

基　　金：长江学者和创新团队发展计划滚动支持(IRT15R29);国家自然科学基金资助项目(51268032)

摘　　要：对不同水灰比下不同矿物掺合料的水泥砂浆的力学性能进行了试验研究,利用火山灰效应比强度分析法,对不同水灰比不同龄期复合掺合料火山灰效应进行了数值分析,并比较了不同硅灰掺量对火山灰效应的影响。结果表明,加入复合矿物掺合料增强了砂浆的强度,同水灰比复合矿物掺合料火山灰效应随龄期变化趋势基本一致,不同水灰比下,复合掺合料的火山灰效应贡献率随龄期表现出不同的变化趋势,但两种水灰比在120 d时火山灰效应贡献率基本一致;另硅灰掺量在不同水灰比下对复合矿物掺合料火山灰效应贡献率明显不同。为了能最大化发挥复合矿物掺合料的火山灰效应,应考虑砂浆的水灰比,通过试验确定最佳的掺量。Under different water cement ratio of different mineral admixture, the mechanical properties of cement mortar were studied, using the method of pozzolanic effect specific strength, of different water cement ratio of different ages composite admixture pozzolanic effect has carried on the numerical analysis, and compare the effect of different dosage of silica fume on the ash.Results show that adding composite mineral admixture to enhance the strength of cement mortar, the same water-cement ratio composite mineral admixtures have almost the same change trend,pozzolanic effect along with age under different water cement ratio, the pozzolanic effect of compound admixtures contribution rate along with the age showed different changing trends, but two kinds of water cement ratio in 120 d pozzolanic effect basic consistent contribution rate.The silica fume content under different water cement ratio of composite mineral admixture ash ratio significantly different effect.ln order to maximize play the pozzolanic effect of compound mineral admixture, consideration should be given water-cement ratio of mortar, through the test to determine the best dosage.

关 键 词：复合矿物掺合料 不同水灰比 火山灰效应 比强度法 

分 类 号：TU528.062[建筑科学—建筑技术科学]