干旱区生态环境知识资源中心(Arid): Desert Aeolian Sand Cementation via Microbially Induced Carbonate Precipitation

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	Desert Aeolian Sand Cementation via Microbially Induced Carbonate Precipitation
	Xu, Xichen; Wang, Hongtao; Lin, Wenbin; Cheng, Xiaohui; Guo, Hongxian
通讯作者	Guo, HX (corresponding author), Tsinghua Univ, Dept Civil Engn, Beijing, Peoples R China.
会议名称	International Foundations Congress and Equipment Expo (IFCEE)
会议日期	MAY 10-14, 2021
会议地点	Dallas, TX
英文摘要	In recent years, microbially induced carbonate precipitation (MICP) acting as an environment-friendly approach has been applied to several fields of geotechnical engineering, such as slope stabilization, liquefaction resistance, and ground improvement. The essence of this MICP technique is to utilize precipitated calcium carbonate to cement loose sand particles thereby improving the mechanical behaviors of sands. In the current study, the MICP technique is applied to cement loose aeolian sands which are further to be the road subgrade in situ. Thus, the main purpose of this study is to investigate the effects of cementation solutions (calcium chloride and urea) with different concentrations (0.25M, 0.5M, 0.75M, 1.0M, and 1.5M), finding the most favorable one. First, the physical properties of aeolian sand are found. Then, the bacterial suspension and cementation solution are injected respectively. Finally, the macro mechanical behaviors of bio-cemented sand samples are examined by the unconfined compressive tests. Moreover, the microstructures of bio-cementation are also investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis.
来源出版物	IFCEE 2021: EARTH RETENTION, GROUND IMPROVEMENT, AND SEEPAGE CONTROL
ISSN	0895-0563
出版年	2021
卷号	324
页码	282-289
ISBN	978-0-7844-8341-1
出版者	AMER SOC CIVIL ENGINEERS
类型	Proceedings Paper
语种	英语
收录类别	CPCI-S
WOS记录号	WOS:000692144800027
WOS类目	Engineering, Civil ; Engineering, Geological
WOS研究方向	Engineering
资源类型	会议论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/365647
作者单位	[Xu, Xichen; Cheng, Xiaohui; Guo, Hongxian] Tsinghua Univ, Dept Civil Engn, Beijing, Peoples R China; [Wang, Hongtao] Univ Sci & Technol Beijing, Sch Civil & Resource Engn, Beijing, Peoples R China; [Lin, Wenbin] Fujian Univ Technol, Sch Civil Engn, Fuzhou, Fujian, Peoples R China
推荐引用方式 GB/T 7714	Xu, Xichen,Wang, Hongtao,Lin, Wenbin,et al. Desert Aeolian Sand Cementation via Microbially Induced Carbonate Precipitation[C]:AMER SOC CIVIL ENGINEERS,2021:282-289.