干旱区生态环境知识资源中心(Arid): Three-Dimensional Reconstruction of Biomineralized Sand and Particle-Flow-Code Numerical Simulation of Penetration Resistance Characteristics of Biomineralization Crust

Arid

DOI	10.1061/(ASCE)GM.1943-5622.0002001
	Three-Dimensional Reconstruction of Biomineralized Sand and Particle-Flow-Code Numerical Simulation of Penetration Resistance Characteristics of Biomineralization Crust
	Zhang, Jinbang; Li, Chi; Wang, Shuo; Bai, Siriguleng
通讯作者	Li, C (corresponding author), Inner Mongolia Univ Technol, Coll Civil Engn, Hohhot 010051, Peoples R China.
来源期刊	INTERNATIONAL JOURNAL OF GEOMECHANICS
ISSN	1532-3641
EISSN	1943-5622
出版年	2021
卷号	21 期号:5
英文摘要	When fine sand is treated with microbial-induced calcite precipitation (MICP), the connections of loose sand particles are reinforced by being filled with crystals of calcium carbonate (CC) caused by the presence of microorganisms. According to the research of scholars, in the process of MICP, the common anhydrous CC crystals are calcite, vaterite, and aragonite. To explore the factors that influence the penetration resistance (PR) of a biomineralization crust (BMC) and to consider the influence of sand particles and CC crystal morphology on strength, this paper reconstructs the sand particles and CC crystals by means of three-dimensional reconstruction from photographic images. Two numerical models based on a particle flow code were established using the discrete element method and were used to investigate separately (1) the unconfined compressive strength (UCS) of a biomineralized sand column; and (2) the PR of a BMC. The research shows that the UCS of an MICP sand column of calcite crystal form is 4.9 MPa, which is 2.39 times that of one of vaterite forms. It is found that the thickness of the BMC and its CaCO3 content has a great influence on the PR of the BMC. The PR shows an increasing trend due to the increase of CC content when the penetration speed is 1.5 m/s and the coating thickness of the coating layer is 2.5 cm. The PR test value at 2.5 cm in the soil layer increases from 52.8 to 103.9 kPa when the penetration speed is 1.5 m/s, the CaCO3 content is 12%, and the thickness of the BMC is increased from 2.5 to 4.5 cm. It is concluded that because the thickness of the BMC and the CC content increases, the PR of the test points in the soil also increases. The results of this study complement the test results of a field-scale experiment and have important value for the large-scale application of MICP technology to desert sites for desertification control.
英文关键词	Microbial-induced calcite precipitation Three-dimensional reconstruction Calcium carbonate crystals Particle flow code Penetration resistance Biomineralization crust
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000651759900028
WOS关键词	CALCIUM-CARBONATE ; PRECIPITATION ; VATERITE ; CACO3 ; POLYMORPH
WOS类目	Engineering, Geological
WOS研究方向	Engineering
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350596
作者单位	[Zhang, Jinbang; Li, Chi; Wang, Shuo] Inner Mongolia Univ Technol, Coll Civil Engn, Hohhot 010051, Peoples R China; [Bai, Siriguleng] Inner Mongolia Univ Technol, Coll Sci, Hohhot 010051, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Jinbang,Li, Chi,Wang, Shuo,et al. Three-Dimensional Reconstruction of Biomineralized Sand and Particle-Flow-Code Numerical Simulation of Penetration Resistance Characteristics of Biomineralization Crust[J],2021,21(5).
APA	Zhang, Jinbang,Li, Chi,Wang, Shuo,&Bai, Siriguleng.(2021).Three-Dimensional Reconstruction of Biomineralized Sand and Particle-Flow-Code Numerical Simulation of Penetration Resistance Characteristics of Biomineralization Crust.INTERNATIONAL JOURNAL OF GEOMECHANICS,21(5).
MLA	Zhang, Jinbang,et al."Three-Dimensional Reconstruction of Biomineralized Sand and Particle-Flow-Code Numerical Simulation of Penetration Resistance Characteristics of Biomineralization Crust".INTERNATIONAL JOURNAL OF GEOMECHANICS 21.5(2021).