粉煤灰粒径特征对水泥砂浆性能的影响  

Effects of Particle Size Distribution of Fly Ash on Properties of Cement Mortar

作　　者：丰曙霞[1] 刘贤萍[2] 

机构地区：[1]山东英才学院建筑工程学院,山东济南250104 [2]同济大学先进土木工程材料教育部重点实验室,上海201804

出　　处：《材料科学与工程学报》2015年第5期707-710,共4页Journal of Materials Science and Engineering

基　　金：山东省自然科学基金资助项目(ZR2014EMP011);山东省科技发展计划资助项目(2013YD06012);山东省住房城乡建设科学技术计划资助项目(RK035);山东省高等学校科技计划资助项目(J14LA51)

摘　　要：通过对原状粉煤灰进行粉磨、分级、再混合等操作,获得不同粒径特征的粉煤灰颗粒群,替代部分水泥配制砂浆。测试粉煤灰-水泥-砂干混料的堆积空隙率、新拌及硬化砂浆性能,研究粉煤灰粒径特征对干混料堆积空隙率的影响以及堆积空隙率与砂浆流动性、抗压强度、抗渗性之间的变化规律。结果表明,新拌砂浆的流动性与干混料堆积空隙率间呈现良好的线性变化关系,干混料堆积空隙率对后期硬化砂浆抗渗性的影响作用较粉煤灰比表面积对其的影响更为显著。Several kinds of fly ash with different particle characteristics were obtained by an original fly ash treatment combining grinding,classifying and mixing.These ashes were then added in a cement mortar to partly replace the cement.Void fraction of fly ash-cement-sand dry mix and properties of both fresh and hardened cement mortars were investigated.Furthermore,the effects of fly ash particle characteristic on void fraction of the dry mix and the relationships between the void fraction and properties of cement mortar including fluidity,compressive strength and anti-permeability were studied.The results show that there is a good linear relationship between fluidity of fresh mortar and the void fraction;void fraction of dry mix influences antipermeability of hardened mortar more obviously than specific surface area of fly ash.

关 键 词：比表面积 堆积空隙率 流动性 抗渗性 

分 类 号：TB321[一般工业技术—材料科学与工程] TQ178[化学工程—硅酸盐工业]