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微生物水泥胶结机理
作者:  钱春香 李龙志 
单位:东南大学材料科学与工程学院 江苏省土木工程材料重点实验室 南京 211189 
关键词:微生物水泥 胶结机理 方解石 化学法 微生物法 
分类号:TU522.07
出版年,卷(期):页码:2013,41(3):314-319
DOI:
摘要:

摘  要:采用X射线衍射、扫描电子显微镜(SEM)和透射电子显微镜(TEM)研究了微生物水泥的胶结机理。SEM分析表明:微生物法诱导形成的方解石形貌呈球形或球状聚集体;化学法形成的方解石形貌呈斜方六面体;微生物法浇注的砂柱和化学法浇注的砂柱内部微观结构相近。TEM分析表明:微生物诱导形成的方解石晶体颗粒尺寸小,能把松散颗粒胶结在一起;化学法形成的方解石颗粒尺寸大,不能把松散颗粒连接在一起。

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Abstract: Cementation mechanism of microbe cement was investigated by X-ray diffraction, scanning electron microscopy (SEM) and transmission electron microscopy (TEM), respectively. SEM results showed that the morphology of microbially induced formation calcite was sphere and spherical aggregate, but that of chemical formation calcite was oblique hexagonal body. In addition, the microstructure of sandstone cemented by the above methods was similar. TEM results indicated that the crystal particles of microbially induced formation calcite was smaller than that of chemical formation calcite and the loose particles could be cemented by microbially induced formation calcite, however, it could not be cemented by chemical formation calcite.

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基金项目:
国家自然科学基金(51072035);教育部博士点基金(200900- 92110029);江苏省普通高校研究生科研创新计划(CXZZ_ 0145);东南大学优秀博士学位论文基金(YBPY1208)和《科技导报》博士生创新研究计划(kjdb2011001)资助。
作者简介:
第一作者:荣 辉(1983—),男,博士研究生。 通信作者:钱春香(1966—),女,教授。
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参考文献:

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