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Dry shrinkage cracking and permeability of biopolymer-modified clay under dry-wet cycles

文献类型：期刊论文

作者Cai, Yangyang2,3; Wan, Yong2; He, Xingxing1,2; Chen, Zhixiang2; Liu, Lei2,4; Li, Jiangshan2,4
刊名ENVIRONMENTAL GEOTECHNICS
出版日期2023-10-11
页码13
关键词bio geotechnics cracks & cracking ground improvement landfills permeability
ISSN号2051-803X
DOI10.1680/jenge.22.00113
英文摘要Biopolymers efficiently improve the anti-seepage function of compacted clay layers, but research concerning the permeability stability of biopolymer-modified clay during cyclic wetting and drying is scarce. In this paper, the macro-microstructures and the permeability coefficients of biopolymer-modified clay and conventional bentonite-modified clay under dry-wet cycles are comparatively studied. The bentonite modifier is found to increase macro-microscopic cracks under dry-wet cycles, while the xanthan modifier decreases the macro-microscopic fracture rate of the clay. The physical properties of 2% by dry weight xanthan-modified clay are similar to those of 10% by dry weight bentonite-modified clay, but the permeability coefficient of the former is lower by approximately one order of magnitude. After the dry-wet cycles, xanthan-modified clay performed better in leakage prevention than bentonite-modified clay. For low-liquid-limit clay, the recommended mass percentage of xanthan gum was 1.5% considering the seepage resistance safety during dry-wet cycles.
资助项目National Natural Science Foundation of China[5197091360] ; National Natural Science Foundation of China[51625903] ; National Natural Science Foundation of China[41774197] ; National Key Research and Development Program[2019YFC1804002] ; Youth Innovation Promotion Association of CAS[2021327] ; Wuhan Science and Technology Conversion Special Project[2018060403011348]
WOS研究方向Engineering
语种英语
WOS记录号WOS:001110540700001
出版者EMERALD GROUP PUBLISHING LTD
源URL[http://119.78.100.198/handle/2S6PX9GI/39940]  
专题中科院武汉岩土力学所
通讯作者Wan, Yong
作者单位1.Tsinghua Univ, Sch Civil Engn, State Key Lab Hydrosci & Engn, Beijing, Peoples R China
2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China
4.IRSM CAS, HK PolyU Joint Lab Solid Waste Sci, Wuhan, Peoples R China
推荐引用方式
GB/T 7714		 Cai, Yangyang,Wan, Yong,He, Xingxing,et al. Dry shrinkage cracking and permeability of biopolymer-modified clay under dry-wet cycles[J]. ENVIRONMENTAL GEOTECHNICS,2023:13.
APA Cai, Yangyang,Wan, Yong,He, Xingxing,Chen, Zhixiang,Liu, Lei,&Li, Jiangshan.(2023).Dry shrinkage cracking and permeability of biopolymer-modified clay under dry-wet cycles.ENVIRONMENTAL GEOTECHNICS,13.
MLA Cai, Yangyang,et al."Dry shrinkage cracking and permeability of biopolymer-modified clay under dry-wet cycles".ENVIRONMENTAL GEOTECHNICS (2023):13.

入库方式： OAI收割

来源：武汉岩土力学研究所

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