高掺量粉煤灰混凝土的收缩性能研究  

Study on Properties of Shrinkage of High-Volume Fly Ash Concrete

作　　者：郑剑之[1] 陈楚鹏[1] 刘青[1] 

机构地区：[1]长安大学公路学院,西安市710064

出　　处：《北方交通》2015年第6期67-69,共3页Northern Communications

摘　　要：为了研究高掺量粉煤灰混凝土的收缩性能,对烧失量为4.75%和7.78%的粉煤灰,且掺量分别为20%、40%、50%、60%时的粉煤灰混凝土的收缩性能进行了研究,测试了试件3~90d的干燥收缩值。结果表明,粉煤灰对混凝土的干燥收缩有明显的抑制效果;低烧失量的粉煤灰对混凝土的收缩抑制效果更显著。In order to study the performance of shrinkage of high- volume fly ash concrete,the cement in concrete were partially replaced by fly ash,whose loss on ignition were 4. 75% and 7. 78%. The amounts of fly ash were 20%,40%,50% and 60% of cement by weight,drying shrinkage value of the specimens from ages of 3 to90 days was tested. The results show that the drying shrinkage of high- volume fly ash concrete was significantly restrained. The effect of low LOI fly ash on reducing concrete shrinkage is superior to high LOI.

关 键 词：粉煤灰混凝土 收缩 高掺量粉煤灰 

分 类 号：TU528[建筑科学—建筑技术科学]