砂率对粉煤灰引气混凝土性能影响  

Effects of sand percentage on the strength of air-entraining fly-ash concrete

作　　者：张静[1] 张众[1] 

机构地区：[1]山东理工大学建筑工程学院,山东淄博255049

出　　处：《混凝土》2014年第3期52-54,63,共4页Concrete

基　　金：山东省优秀中青年科学家科研奖励基金项目(2009BSB02012)

摘　　要：为了研究砂率对粉煤灰引气混凝土性能的影响，对掺量为30％、40％、50％粉煤灰引气混凝土进行了强度试验，获得了混凝土在不同粉煤灰掺量（30％～50％）下，混凝土坍落度和3、7、28d粉煤灰引气混凝土强度的数据。试验数据表明：在一定的范同内，粉煤灰引气混凝土的坍落度和抗压强度，随着砂率的逐渐增大，由逐渐提高向缓慢的降低变化。提出了高掺量粉煤灰引气混凝土合理砂率取值与配合比设计的建议。In order to study the effects of sand percentage on the strength of air-entraining fly-ash concrete, standard concrete specimens with mixing amount of 30%, 40%, 50% were prepared,compressive strength tests at age of 3,7,28 d were conducted.The experiment results showed that, with increasing sand ratio, the slump, cubic compressive strength of air-entraining fly-ash concrete has the tendency of increas- ing first and then decreasing.The reasonable values of sand ratio and the mixture design method of high volume fly-ash concrete are proposed.

关 键 词：粉煤灰 砂率 工作性 

分 类 号：TU528.062[建筑科学—建筑技术科学]