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微生物水泥的胶结过程
作者: 1 钱春香2  1 高桂波3 何智海4 杨久俊1 
单位:1. 天津城建大学材料科学与工程学院 天津 300384 2. 东南大学材料科学与工程学院 南京 211189  3. 山东省建筑科学研究院 济南 250031 4. 绍兴文理学院土木工程学院 浙江 绍兴 312000 
关键词:微生物水泥 胶结过程 方解石 微生物 
分类号:TU522.07
出版年,卷(期):页码:2015,43(8):1067-1075
DOI:10.14062/j.issn.0454-5648.2015.08.08
摘要:

采用生物显微镜、扫描电镜和荧光显微镜研究了微生物水泥在松散砂颗粒间形成胶结物碳酸钙的过程。结果表明:微生物水泥在1.0 h 之内便会在松散砂颗粒之间形成胶结物碳酸钙,该胶结过程大约持续到5.0 h,继续延长时间,则对胶结效果影响较小;微生物水泥中的微生物首先吸附在松散砂颗粒表面,然后再与反应液在松散砂颗粒表面发生化学反应形成胶结物碳酸钙。随着松散砂颗粒间胶结物的增多,松散砂颗粒便逐渐胶结成为整体。

 

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Cementation process of microbe cement was investigated by biological microscope, scanning electron microscopy andfluorescence microscopy, respectively. The results by biological microscope show that microbe cement is a formation cementationmatter of calcium carbonate between loose sand particles within 1.0 h, and the cementation process continues for 5.0 h, and thecementation has no effect afterwards. The results by scanning electron microscope and fluorescence microscope indicate that microorganismin microbe cement is firstly absorbed on the surface of loose sand particles, and then reacts with reaction fluids to form thecementation matter of calcium carbonate on the surface of loose sand particles. The loose sand particles will gradually become awhole body when the cementation matter between loose sand particles increases.

 

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基金项目:
国家自然科学基金(51372163);天津城建大学科研启动项目(05140403)。
作者简介:
第一作者:荣 辉(1983—),男,博士,讲师。
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