改性花岗岩石粉对水泥的性能影响  

Impact on the performance of the modified granite stone powder for cement

作　　者：李相国[1] 李孟蕾[1] 马保国[1] 朱艳超[1] 徐斌[1] 

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,湖北武汉430070

出　　处：《混凝土》2013年第8期87-90,共4页Concrete

基　　金：国家自然科学基金(50823511)

摘　　要：提出了一种通过改性花岗岩石粉取代水泥做水泥掺合料的方法,并分析了改性花岗岩石粉在不同取代量下砂浆的流动度、干缩率和不同龄期抗压、抗折强度,同时通过XRD,SEM对其水化微观机理进行了分析。在此基础上探讨了改性花岗岩石粉取代量对水泥性能的影响。试验结果表明:随着改性花岗岩石粉取代水泥量的增加,砂浆的干缩率逐渐降低,砂浆的流动度逐渐变大,同时,砂浆的抗压、抗折强度逐渐降低。当改性花岗岩石粉取代量在20%时,砂浆28d抗压强度42.6MPa,抗折强度8.5MPa。Proposed a modified granite stone powder to replace cement as cement admixture and analysis modified granite stone powder in different substitution under mortar fluidity,drying shrinkage and the instars compression,flexural strength.At the same time by means of XRD,SEM analysis microscopic mechanism of their hydration.On this basis,investigate the relationship between the amount of modified granite stone powder replace of cement and the performance.The experimental results showed that：as modified granite stone powder replace the increase in the amount of cement,mortar shrinkage rate gradually decreased gradually larger flow of mortar,at the same time,the mortar compressive and flexural strength decreased gradually.When modified granite stone powder to replace the amount of 20%,28 d mortar compressive strength of 42.6 MPa,flexural strength of 8.5 MPa.

关 键 词：花岗岩石粉 改性 掺合料 性能 

分 类 号：TU528.041[建筑科学—建筑技术科学]