Study on microstructure and properties of sandstone cemented by microbe cement

Study on microstructure and properties of sandstone cemented by microbe cement
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微生物胶结砂岩微观结构与性能研究

DOI:
10.1016/j.conbuildmat.2012.06.063
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发表时间:
2012-11
影响因子:
7.4
通讯作者:
Chunxiang Qian
Chunxiang Qian
中科院分区:
工程技术1区
文献类型:
--
作者:
Hui Rong;Chunxiang Qian

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微生物水泥作为一种生物灌浆剂,可以固结松散颗粒,提高力学性能。随着人们环保意识的日益增强,微生物水泥越来越受到人们的关注。论证了微生物水泥粘结松散砂粒的可行性,详细阐述了微生物水泥的胶结机理。此外,利用x射线计算机断层扫描(XRCT)、扫描电镜(SEM)和压汞孔隙测定(MIP)等方法对代表性生物砂岩的微观结构和性质进行了分析。实验结果表明,生物砂岩的抗压强度可达6.1MPa,由于生物砂岩底部析出的方解石较多,其微观结构较顶部致密,脆性较小。
Microbe cement as a biogrouting could consolidate loose particles to improve mechanical properties. Microbe cement has drawn much attention because of the ever increasing awareness of environmental protection. This paper confirms the feasibility of binding loose sand particles using microbe cement and details the cementation mechanism of microbe cement. In addition, the microstructure and properties of representative bio-sandstones have been analyzed by X-ray computed tomography (XRCT), Scanning electron microscopy (SEM) and Mercury Intrusion Porosimetry (MIP). The experimental results indicate that the compressive strength of bio-sandstone could be up to 6.1MPa and the bottom region microstructure in bio-sandstone is denser and less fragile than the top region due to more calcite precipitated in the former one.
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发表时间: 2001
影响因子: 1.7
作者:
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