大掺量矿物掺合料自密实混凝土抗碳化性能研究  

Study on Carbonation Resistance of Self-compacting Concrete Containing Massive Mineral Admixture

作　　者：郑建岚[1] 黄利频[1] 

机构地区：[1]福州大学土木工程学院,福建福州350108

出　　处：《建筑材料学报》2012年第5期678-683,共6页Journal of Building Materials

基　　金：国家自然科学基金资助项目(50878056);福建省科技厅重点项目(2009H0027)

摘　　要：设计了单掺粉煤灰和复掺粉煤灰与矿渣微粉的3个系列自密实混凝土试件.通过快速碳化试验、吸水试验,研究单掺粉煤灰和复掺粉煤灰与矿渣微粉对自密实混凝土抗碳化性能的影响.结果表明:当粉煤灰单掺掺量大于40%(质量分数)后,随着粉煤灰掺量的增大,自密实混凝土抗碳化能力迅速下降;粉煤灰与矿渣微粉复掺可显著缓和大掺量粉煤灰自密实混凝土抗碳化性能的下降.矿物掺合料对自密实混凝土抗碳化性能的影响存在正负效应.One series of self-compacting concrete（SCC） specimens incorporating fly ash and two series of SCC specimens incorporating both fly ash and ground granulated blast slag were designed. Based on accel- erated carbonation and water absorption test, the effects of cement replacement by only fly ash and by both fly ash and slag powder on the carbonation resistance of SCC were studied. It is found that, when the re- placement rate of fly ash is more than 40~//00 （by mass）, the carbonation depth of SCC increases rapidly as the replacement rate increases. However, replacement by both fly ash and slag powder greatly improves the carbonation resistance of SCC incorporating massive by mineral admixtures on carbonation resistance of SCC fly ash. Both positive and negative effects caused are analyzed.

关 键 词：自密实混凝土 粉煤灰 矿渣微粉 碳化 

分 类 号：TU528[建筑科学—建筑技术科学]