Swelling pressure of compacted expansive soil over a wide suction range

doi:10.1016/j.clay.2021.106018

	Swelling pressure of compacted expansive soil over a wide suction range
	Liang, Wei-yun 2; Yan, Rong-tao 2; Xu, Yong-fu 3; Zhang, Qin 2; Tian, Hui-hui 1; Wei, Chang-fu 1,2,4
刊名	APPLIED CLAY SCIENCE
	2021-03-15
卷号	203 页码:9
关键词	Expansive soils Suction Swelling pressure Confined conditions NMR
ISSN号	0169-1317
DOI	10.1016/j.clay.2021.106018
英文摘要	A series of wetting experiments was performed on a compacted expansive clay to evaluate the swelling pressure generated over a wide suction range. Both osmotic and vapor equilibrium techniques were introduced and implemented to apply the suction required in the swelling pressure measurements. It is shown that, associated with the evolution of the microstructure of soil during wetting, the development of swelling pressure with decreasing suction is nonmonotonic. The soil water retention characteristics were independent of dry density at high suction in the adsorption regime, and a threshold suction was identified to distinguish adsorbed and capillary waters. The development of swelling pressure was closely related to the water retention characteristics. At high suction, the swelling pressure stems mainly from interlayer hydration; at low suction, however, the swelling pressure was controlled by the development of double layers, accompanied by the collapse of some macropores. The nuclear magnetic resonance (NMR) technique was introduced to determine the specific amount of adsorbed and capillary water contents, shedding new insights into the swelling behavior of compacted expansive soil during the wetting process under confined conditions.
资助项目	National Key Research & Development Program of China[2019YFC1509800] ; Natural Science Foundation of China (NSFC)[11962004] ; Department of Science and Technology of Guangxi[2020AC05005]
WOS研究方向	Chemistry ; Materials Science ; Mineralogy
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000634126800001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/25982]
专题	中科院武汉岩土力学所
通讯作者	Wei, Chang-fu
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China 2.Guilin Univ Technol, Guangxi Key Lab Geomech & Geotech Engn, Guilin 541004, Guangxi, Peoples R China 3.Shanghai Jiao Tong Univ, Dept Civil Engn, Shanghai 200240, Peoples R China 4.Guilin Univ Technol, Coll Civil Engn & Architecture, Guilin 541004, Guangxi, Peoples R China
推荐引用方式 GB/T 7714	Liang, Wei-yun,Yan, Rong-tao,Xu, Yong-fu,et al. Swelling pressure of compacted expansive soil over a wide suction range[J]. APPLIED CLAY SCIENCE,2021,203:9.
APA	Liang, Wei-yun,Yan, Rong-tao,Xu, Yong-fu,Zhang, Qin,Tian, Hui-hui,&Wei, Chang-fu.(2021).Swelling pressure of compacted expansive soil over a wide suction range.APPLIED CLAY SCIENCE,203,9.
MLA	Liang, Wei-yun,et al."Swelling pressure of compacted expansive soil over a wide suction range".APPLIED CLAY SCIENCE 203(2021):9.