Microstructure Evolution of Sandstone Cemented by Microbe Cement Using X-ray Computed Tomography  

作　　者：RONG Hui QIAN Chunxiang 

机构地区：[1]School of Materials Science and Engineering,Southeast University [2]Jiangsu Key Laboratory of Construction Material [3]Research Institute of Green Construction Materials,Southeast University

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2013年第6期1134-1139,共6页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(No.51072035),the Ph D Program’s Foundation of Ministry of Education of China(No.20090092110029);the Research Innovation Program for College Graduates of Jiangsu Province(No.CXZZ_0145);the Scientific Research Foundation of Graduate School of Southeast University(Nos.YBJJ1127 and YBPY1208)

摘　　要：The bio-sandstone, which was cemented by microbe cement, was firstly prepared, and then the microstructure evolution process was studied by X-ray computed tomography （X-CT） technique. The experimental results indicate that the microstructure of bio-sandstone becomes dense with the development of age. The evolution of inner structure at different positions is different due to the different contents of microbial induced precipitation calcite. Besides, the increase rate of microbial induced precipitation calcite gradually decreases because of the reduction of microbe absorption content with the decreasing pore size in bio-sandstone.The bio-sandstone, which was cemented by microbe cement, was firstly prepared, and then the microstructure evolution process was studied by X-ray computed tomography （X-CT） technique. The experimental results indicate that the microstructure of bio-sandstone becomes dense with the development of age. The evolution of inner structure at different positions is different due to the different contents of microbial induced precipitation calcite. Besides, the increase rate of microbial induced precipitation calcite gradually decreases because of the reduction of microbe absorption content with the decreasing pore size in bio-sandstone.

关 键 词：microbe cement bio-sandstone microstructure evolution x-ray computed tomography CALCITE 

分 类 号：TU528.01[建筑科学—建筑技术科学]