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高密度水泥浆的硬化浆体结构对其流变性能的影响
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 
单位: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 
关键词:水泥浆 铁矿粉 显微形貌 流变性能 
分类号:TQ172
出版年,卷(期):页码:2013,41(4):0-500
DOI:
摘要:

用不同细度的铁矿粉、细度为76 μm (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。
 

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Cementing slurries of different densities were prepared with hematite of different finenesses, 76 μm 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.
 

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基金项目:
国家自然科学基金(U1134008)资助项目。
作者简介:
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参考文献:

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