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Loose Sand Cemented by Microbial Cementitious Material:Composition,Microstructure and Mechanical Properties

查看全文 作　　者：[1,2]詹其伟;WANG [1]Shugang;LIU [3]Baoya;PAN [1]Zhihong;YU [4]Xiaoniu;QIAN [5]Chunxiang 高影响力作者 机构地区：[1]School of Civil Engineering and Architecture,Jiangsu University of Science and Technology,Zhenjiang 212100,China;[2]Guangdong Provincial Key Laboratory of Building Energy Efficiency and Application Technologies,Guangzhou University,Guangzhou 510006,China;[3]Training Base,PLA Army Engineering University,Xuzhou 221004,China;[4]Department of Civil and Environmental Engineering,Nanyang Technological University,Singapore City,639798,Singapore;[5]College of Materials Science and Engineering,Southeast University,Nanjing 211189,China高影响力机构 出　　处：《Journal of Wuhan University of Technology(Materials Science)》索引2021年第36卷第5期,共6页高影响力期刊 基　　金：Funded by National Natural Science Foundation of China(No.51372038);Open Fund of Guangdong Provincial Key Laboratory of Building Energy Efficiency and Application Technologies;Science and Technology Research Program of Jiangsu Transport Department(No.2015T32)。 摘　　要：Through the influence of the dosage of culture solution and calcium source on hardness and compressive strength of samples,the formulation of microbial cementitious materials was optimized and defined.The influence of temperature on composition,microstructure and mechanical properties of loose sand cemented by microbial cementitious material was compared and analyzed systematically.With the increase of temperature,the performance of loose sand was improved remarkably.Calcite with cementitious properties could be induced at higher temperatures,but not at lower temperatures.When the temperature was 30℃,loose sand cemented by microbial cementitious material had more calcite and more dense structure.Moreover,hardness and compressive strength were also superior.The wind tunnel test showed that the wind erosion resistance was improved obviously and the mass loss was lower at high temperature.Engineering properties of loose sand cemented by microbial cementitious material was measured integrally.Through comparative analysis,engineering properties of loose sand were basically unchanged,and there was no negative effect on the later period use of sand. 关 键 词：loose sand microbial cementitious material CALCITE MICROSTRUCTURE mechanical properties
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