高掺粉煤灰下MgO对水泥砂浆压蒸膨胀变形和抗压强度的影响  

Effect of MgO on the autoclave-treated expansion deformation and compressive strength of the cement mortar under high fly ash

作　　者：赵鹏 陈昌礼[1] ZHAO Peng;CHEN Changli(School of Materials and Architecture Engineering,Guizhou Normal University,Guiyang 550025,China)

机构地区：[1]贵州师范大学材料与建筑工程学院,贵州贵阳550025

出　　处：《混凝土》2018年第12期104-106,共3页Concrete

基　　金：贵州省工业攻关项目(黔科合GZ字(2015)3025)

摘　　要：为探索高掺粉煤灰下MgO混凝土的变形性能,对高掺粉煤灰下外掺MgO水泥砂浆的压蒸膨胀变形和抗压强度进行了试验研究。结果表明:外掺MgO水泥砂浆的压蒸膨胀变形随MgO掺量的增大而增大,且当MgO掺量超过某一个值时,水泥砂浆的压蒸膨胀变形会发生突变;压蒸后的水泥砂浆的抗压强度随MgO掺量增加的变化趋势是先增大后减小;粉煤灰对外掺MgO水泥砂浆的压蒸膨胀变形存在明显的抑制作用,且粉煤灰掺量越大,其抑制膨胀变形的作用越明显。In order to explore the deformation properties of MgO concrete under high mixed fly ash,the compressive expansion and deformation of MgO cement mortar mixed with high mixed fly ash were studied.The results show that the compressive expansion and deformation of MgO cement mortar is increased with the increase of MgO mixing,and when the MgO content exceeds a certain value,the deformation of cement mortar will change abruptly,and the compressive strength of cement mortar are increasing with the MgO content increases firstly and then decreases.The effect of fly ash on the expansion deformation of MgO cement mortar has obvious inhibitory effect,and the larger the fly ash content,the more obvious the effect of its inhibition is.

关 键 词：水泥砂浆 氧化镁膨胀剂 压蒸膨胀率 抗压强度 试验研究 

分 类 号：TU528.041[建筑科学—建筑技术科学]