Characterization of microbe cementitious materials  

作　　者：RONG Hui QIAN ChunXiang 

机构地区：[1]School of Materials Science and Engineering,Southeast University,Nanjing 211189,China [2]Jiangsu Key Laboratory of Construction Material,Nanjing 211189,China

出　　处：《Chinese Science Bulletin》2012年第11期1333-1338,共6页

基　　金：supported by the National Natural Science Foundation of China (51072035);Ph.D. Program’s Foundation of Ministry of Education of China (20090092110029);Research Innovation Program for College Graduates of Jiangsu Province (CXZZ_0145);Scientific Research Foundation of Graduate School of Southeast University (YBJJ1127)

摘　　要：A new generation of cement, microbe cement, has been developed in response to the ever increasing awareness of environmental protection. Microbe cement is a new strengthening material based on microbiologically induced precipitation of calcium carbonate. This paper confirms the feasibility of binding loose sand particles using microbe cement and details the cementation mechanism of microbe cement. We have also prepared microbe cementitious materials (biosandstones). The compressive strength of the bio-sandstone, which depends on the content of calcium carbonate produced by microbially induced precipitation and the bio-mediated calcite crystal size, could be up to 12 MPa at an age of 20 days. By increasing the precipitated calcite content, the compressive strength and microstructure of bio-sandstone could be improved.A new generation of cement, microbe cement, has been developed in response to the ever increasing awareness of environmental protection. Microbe cement is a new strengthening material based on microbiologically induced precipitation of calcium car- bonate. This paper confirms the feasibility of binding loose sand particles using microbe cement and details the cementation mechanism of microbe cement. We have also prepared microbe cementitious materials （biosandstones）. The compressive strength of the bio-sandstone, which depends on the content of calcium carbonate produced by microbially induced precipitation and the bio-mediated calcite crystal size, could be up to 12 MPa at an age of 20 days. By increasing the precipitated calcite content, the compressive strength and microstructure of bio-sandstone could be improved.

关 键 词：胶凝材料 微生物 碳酸钙含量 方解石晶体 生物水泥 表征 抗压强度 环保意识 

分 类 号：TU528[建筑科学—建筑技术科学]