Evaporation and shrinkage processes of compacted bentonite-sand mixtures

doi:10.1016/j.sandf.2020.03.008

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Evaporation and shrinkage processes of compacted bentonite-sand mixtures
	Tan, Yu 1; Zhang, Huyuan 1,2; Wang, Ying 1,3
刊名	Soils and Foundations
	2020-04-01
卷号	60 期号:2 页码:505-519
关键词	Bentonite Compaction Deterioration Evaporation Mixtures Reinforcement Bentonite-sand mixtures Clay barriers Compacted bentonite Compacted clays Secondary shrinkage Shrinkage properties Smectite particles Volumetric shrinkage
ISSN号	00380806
DOI	10.1016/j.sandf.2020.03.008
英文摘要	The deterioration of compacted bentonite-sand mixtures (CBSMs) after suffering desiccation increases the hydraulic conductivity of clay barriers, posing risks to the environment. This work compressed bentonite-sand mixtures (BSMs) to various dry densities in order to conduct the free-drying tests, focusing on the evaporation and shrinkage processes. The compaction constrained the permeability of the mixtures and resulted in the delay in evaporation and shrinkage of the CBSMs’ internal parts (compared to their external parts). Subsequently, the secondary shrinkage occurred (i.e., the smaller volumetric shrinkage after the shrinkage limit reached). Compaction constrained the plate-like smectite particles in being propped up and led them to orientate. This structure reinforced the CBSMs’ shrinkage property and contributed to their lower air entry value, shrinkage limit, and final void ratio. During the design and maintenance of compacted clay barriers, secondary shrinkage and the reinforced shrinkage property are proposed to be taken into consideration. © 2020
WOS研究方向	Engineering ; Geology
语种	英语
出版者	Elsevier B.V., Netherlands
WOS记录号	WOS:000543370000015
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115411]
专题	土木工程学院
作者单位	1.School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou; 730000, China; 2.Key Laboratory of Mechanics on Disaster and Environment in Western China (Lanzhou University), Ministry of Education, Lanzhou; 730000, China; 3.School of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Tan, Yu,Zhang, Huyuan,Wang, Ying. Evaporation and shrinkage processes of compacted bentonite-sand mixtures[J]. Soils and Foundations,2020,60(2):505-519.
APA	Tan, Yu,Zhang, Huyuan,&Wang, Ying.(2020).Evaporation and shrinkage processes of compacted bentonite-sand mixtures.Soils and Foundations,60(2),505-519.
MLA	Tan, Yu,et al."Evaporation and shrinkage processes of compacted bentonite-sand mixtures".Soils and Foundations 60.2(2020):505-519.