掺粉煤灰、沙漠砂高强混凝土抗压强度研究  

Influence of fly ash and desert Sand content on the compressive st rength of high st rength concrete

作　　者：陈云龙[1] 马菊荣 刘海峰[1] 宋建夏[1] 

机构地区：[1]宁夏大学土木与水利工程学院,宁夏银川750021

出　　处：《混凝土》2014年第7期80-84,共5页Concrete

基　　金：国家自然基金(11162015;51368048);国家级大学生创新实验

摘　　要：通过正交试验,分析了水胶比、粉煤灰掺量、砂率、沙漠砂取代率对不同龄期高强混凝土抗压强度影响,并给出了配制高强混凝土的最优配合比。研究结果表明:用沙漠砂替代中砂配制高强混凝土是可行的;综合考虑各阶段的抗压强度,高强混凝土的最优配合比为水胶比0.24、粉煤灰掺量10%、砂率30%、沙漠砂取代率30%。The orthogonal experiment was designed to analyze the influence of water-binder ratio, fly ash content, sand ratio and desert sand replacement ratio on the compressive strength of high strength concrete at the different age.The optimum mix ratio of desert sand high-strength concrete was also given out.Experimental result showed that it is practical to use the desert sand from Mu Us desert sand to mix high strength concrete, the optimum mix ratio of which was that water-binder ratio, fly ash dosage, sand ratio and desert sand replacement ratio were 0.24,10%, 30% and 30%, respectively.

关 键 词：毛乌素沙地砂 粉煤灰 高强混凝土 正交试验 

分 类 号：TU528.041[建筑科学—建筑技术科学]