Study on microstructure and properties of sandstone cemented by microbe cement

被引：79
作者：
Rong, Hui
Qian, Chun-Xiang [1 ]
Li, Long-zhi
机构：
[1] Southeast Univ, Coll Mat Sci & Engn, Nanjing 211189, Jiangsu, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2012年 / 36卷
关键词：
Microbe cement; Bio-sandstone; Microstructure; X-ray computed tomography; Strength; CARBONATE PRECIPITATION; CALCIUM-CARBONATE; PERMEABILITY; PROTECTION;
D O I：
10.1016/j.conbuildmat.2012.06.063
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
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 6.1 MPa 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. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：687 / 694
页数：8
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