高密度水泥浆的硬化浆体结构对其流变性能的影响  

Influence of Hardened Paste Microstructure on Rheological Property of Cementing Slurries with High Density

作　　者：米贵东[1] 朱江林[2] 赵军[2] 冯建建[2] 赵琥[2] 罗宇维[2] 阎培渝[1] 

机构地区：[1]清华大学土木工程系,土木工程安全与耐久教育部重点实验室,北京100084 [2]中海油田服务股份有限公司,北京101149

出　　处：《硅酸盐学报》2013年第4期500-504,共5页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(U1134008)资助项目

摘　　要：用不同细度的铁矿粉、细度为76μm(200目)硅粉和G级油井水泥,制备了不同密度的水泥浆并测定其流变性能。用扫描电子显微镜观察了硬化水泥浆体的微观形貌,并讨论了铁矿粉在水泥浆中的分布状态对于水泥浆流变性能的影响,结果表明:在硬化高密度水泥浆中,惰性的铁矿粉和硅粉分散在水化产物连续基体中;其浆体的致密程度由水泥的水化产物控制;最紧密堆积理论不能指导高密度水泥浆的配方设计。优先采用细铁矿粉配制水泥浆,易于获得流变性能合格的高密度水泥浆。Cementing slurries of different densities were prepared with hematite of different finenesses, 76μm silica fumes and grade G oil well cement. The rheological properties of fresh slurries were tested. The micromorphology of hardened slurries was observed by scanning electron microscope. The results show that in hardened cement paste, inert hematite and silica fume were scattered in the continuous matrix of hydration products of cement. The compacting degree of hardened slurry was controlled by the hydration products. The close accumulation theory can＇t be the design reference of high density slurry. The results show that fine hematite makes better high density cementing slurry of qualified rheological properties.

关 键 词：水泥浆 铁矿粉 显微形貌 流变性能 

分 类 号：TQ172[化学工程—水泥工业]