Microstructural evolution of expansive clay during drying-wetting cycle

doi:10.1007/s11440-020-00938-4

	Microstructural evolution of expansive clay during drying-wetting cycle
	Ma, Tiantian 4; Wei, Changfu 3; Yao, Chuanqin 2; Yi, Panpan 1
刊名	ACTA GEOTECHNICA
	2020-02-18
页码	12
关键词	Drying-wetting cycle Expansive soil Microscopic structure Pore size distribution Water distribution
ISSN号	1861-1125
DOI	10.1007/s11440-020-00938-4
英文摘要	This paper presents a comprehensive investigation on the microstructural evolutions of expansive clay during a drying-wetting cycle, including pore size distribution (PSD) via mercury intrusion porosimetry and water distribution via nuclear magnetic resonance (NMR). The soil water characteristic curves at different soil densities and soil shrinkage curve are also obtained, and a threshold suction can be identified to distinguish the adsorptive and capillary regimes of pore water. Combined with the water distribution obtained by the NMR technique, the evolutions of the adsorptive water and capillary water during drying-wetting cycle were addressed. The measured PSD curves of the expansive soils at different suctions showed two distinct peaks, corresponding to micropores and macropores, respectively. Both variations of macropores and micropores are irreversible during the wetting-drying cycle, which partly explain the adsorptive water content decreasing when the suction is small.
资助项目	National Natural Science Foundation of China (NSFC)[41972290] ; National Natural Science Foundation of China (NSFC)[41877269] ; National Natural Science Foundation of China (NSFC)[51639008] ; Hubei Provincial Natural Science Foundation of China[2017CFB225]
WOS研究方向	Engineering
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000516297400001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/23621]
专题	中科院武汉岩土力学所
通讯作者	Ma, Tiantian
作者单位	1.Wuchang Univ Technol, Wuhan 430223, Hubei, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Guilin Univ Technol, Coll Civil & Architectural Engn, Guilin 541004, Guangxi, Peoples R China 4.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Ma, Tiantian,Wei, Changfu,Yao, Chuanqin,et al. Microstructural evolution of expansive clay during drying-wetting cycle[J]. ACTA GEOTECHNICA,2020:12.
APA	Ma, Tiantian,Wei, Changfu,Yao, Chuanqin,&Yi, Panpan.(2020).Microstructural evolution of expansive clay during drying-wetting cycle.ACTA GEOTECHNICA,12.
MLA	Ma, Tiantian,et al."Microstructural evolution of expansive clay during drying-wetting cycle".ACTA GEOTECHNICA (2020):12.