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Full-Text Articles in Engineering
Dynamic Behaviors Of Micp And Fiber-Treated Calcareous Sand Under Dynamic Triaxial Testing, Rui Wang, Xiao-Hua Pan, Chao-Sheng Tang, Chao L, Dian-Long Wang, Zhi-Hao Dong, Bin Shi
Dynamic Behaviors Of Micp And Fiber-Treated Calcareous Sand Under Dynamic Triaxial Testing, Rui Wang, Xiao-Hua Pan, Chao-Sheng Tang, Chao L, Dian-Long Wang, Zhi-Hao Dong, Bin Shi
Rock and Soil Mechanics
To improve the liquefaction resistance of calcareous sand foundations, microbially induced calcium carbonate precipitation (MICP) technology and fiber reinforcement technology was combined to treat the calcareous sand sampled from the South China Sea. Based on dynamic triaxial tests, the dynamic behaviors of MICP-treated and fiber-reinforced calcareous sand, including dynamic strain, dynamic pore pressure, stress−strain hysteresis loop and dynamic modulus of elasticity, were analyzed. Then, the strengthening mechanism of MICP and fiber on the mechanical properties of the treated calcareous sand was explored from the microscopic point of view, based on the scanning electron microscope (SEM) test results. The results show …
Advances In Soil Cementation By Biologically Induced Calcium Carbonate Precipitation, Qian Zhang, Wei-Min Ye, Zhang-Rong Liu, Qiong Wang, Yong-Gui Chen
Advances In Soil Cementation By Biologically Induced Calcium Carbonate Precipitation, Qian Zhang, Wei-Min Ye, Zhang-Rong Liu, Qiong Wang, Yong-Gui Chen
Rock and Soil Mechanics
Soil cementation technology based on microbially or enzymatically induced calcium carbonate precipitation (MICP/EICP) is one of the hot topics in the field of geotechnical and geological engineering in recent years. In this study, a systematic review was performed on this technology, focusing on advances in the cementation mechanisms of MICP/EICP and the influence of soil pore structures, properties of bacterium, urease and cementation solution, and cementation methods on characteristics of calcium carbonate (CaCO3). The results indicate that the smaller the soil pores are, the more difficult the infiltration of microorganisms or urease is and the worse the cementation uniformity is. …