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Microstructure evolution of sandstone cemented by microbe cement using X-ray computed tomography |
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| Authors: | Hui Rong Chunxiang Qian |
| Affiliation: | 1. School of Materials Science and Engineering, Southeast University, Nanjing, 211189, China 2. Jiangsu Key Laboratory of Construction Material, Nanjing, 211189, China 3. Research Institute of Green Construction Materials, Southeast University, Nanjing, 211189, China |
| Abstract: | 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. |
| Keywords: | microbe cement bio-sandstone microstructure evolution x-ray computed tomography calcite |
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