Matric Suction and Volume Characteristics of Compacted Clay Soil under Drying and Wetting Cycles

doi:10.1520/GTJ20170310

	Matric Suction and Volume Characteristics of Compacted Clay Soil under Drying and Wetting Cycles
	Liu, Guanshi 2; Toll, D. G.1; Kong, Lingwei 2; Asquith, J. D.1
刊名	GEOTECHNICAL TESTING JOURNAL
	2020-03-01
卷号	43 期号:2 页码:464-479
关键词	water retention curves shrinkage volume change matric suction clay drying wetting
ISSN号	0149-6115
DOI	10.1520/GTJ20170310
英文摘要	The influence of drying and wetting cycles on matric suction and volume characteristics of a compacted low-plasticity clay soil was studied experimentally. An apparatus was developed in which soil specimens were placed in direct contact with a high-suction tensiometer, then repeated drying and wetting cycles were applied, with drying by means of evaporation and wetting using the application of water droplets. The matric suction, vertical and radial displacement, and mass change of the specimens were all monitored continuously during the cycles. The equipment is the first to provide natural drying, unconstrained shrinkage, or swelling with continuous measurements of volume, suction, and water content in a way that could readily be used in engineering practice. The results indicated that drying-wetting cycles resulted in accumulated irreversible shrinkage. However, the amount of shrinkage decayed very significantly as the number of cycles increased, and the behavior became almost repeatable after the third cycle. It was also observed that the positions of soil water retention curves under drying-wetting cycles shift downwards with the increasing number of cycles; the larger the number of cycles, the smaller the difference between the curves, and after two or three cycles, the difference became steady. The shape of the curves changed very obviously under the first three drying-wetting cycles but less significantly after this.
资助项目	Overseas Study Plan 2009 from the Chinese Academy of Sciences ; Natural Science Foundation of China[51279200]
WOS研究方向	Engineering ; Geology
语种	英语
出版者	AMER SOC TESTING MATERIALS
WOS记录号	WOS:000522031900011
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/23883]
专题	中科院武汉岩土力学所
通讯作者	Toll, D. G.
作者单位	1.Univ Durham, Dept Engn, South Rd, Durham DH1 3LE, England 2.Chinese Acad Sci, Inst Rock & Soil Mech, Wuhan 430071, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Liu, Guanshi,Toll, D. G.,Kong, Lingwei,et al. Matric Suction and Volume Characteristics of Compacted Clay Soil under Drying and Wetting Cycles[J]. GEOTECHNICAL TESTING JOURNAL,2020,43(2):464-479.
APA	Liu, Guanshi,Toll, D. G.,Kong, Lingwei,&Asquith, J. D..(2020).Matric Suction and Volume Characteristics of Compacted Clay Soil under Drying and Wetting Cycles.GEOTECHNICAL TESTING JOURNAL,43(2),464-479.
MLA	Liu, Guanshi,et al."Matric Suction and Volume Characteristics of Compacted Clay Soil under Drying and Wetting Cycles".GEOTECHNICAL TESTING JOURNAL 43.2(2020):464-479.