界面区结构对水泥砂浆强度的影响

在研究具有水硬性表面层和惰性内核复合结构的深加工处理石英集料对砂浆界面区结构的改进效果，比较深加工处理石英砂浆（ＭＴＱＳ）、普通石英砂浆（ＭＱＳ）和硬化水泥浆体（ＨＣＰ）等３种试样强度随养护时间变化的基础上，研究了界面区结构对水泥砂浆强度的影响．结果表明：使用深加工处理石英集料能有效地改进界面区薄弱结构；界面区结构对水泥砂浆的早期强度影响较小，但对后期强度影响较大；改进界面区结构能大幅度提高水泥砂浆的抗压强度和抗折强度．

INFLUENCES OF STRUCTUTURE OF INTERFACIAL ZONE ON THE MECHANICAL PROPPERTIES OF CEMENT MORTAR

On the basis of investigating the improved structure of interfacial zone between cement paste and pretreated quartz aggregate composed of hydratilic surface layer and inert core.and comparing the strength change with curing time for three samples including mortars with pre-treated quartz aggregate( MTQS)and normal quartz aggregate(MQS)and hardened cement paste(HCP),the influences of structure of interfacial zone on the mechanical properties of cement mor-tar were studied. Results show that the weak structure of interfacial zone is effectively improvedby using pretreated quartz aggregate. Influences of interfacial structure on the mechanical proper-ties seem to be slight at early stage but obvious at late stage. Both compressive and flexuralstrengths of cement mortar are highly raised as the structure of interfacial zone is improved.