Evaporation and shrinkage processes of compacted bentonite-sand mixtures

doi:10.1016/j.sandf.2020.03.008

IR > 土木工程学院

	Evaporation and shrinkage processes of compacted bentonite-sand mixtures
	Tan, Yu 1; Zhang, Huyuan 1,2; Wang, Ying1,3
	2020-04
发表期刊	Soils and Foundations
ISSN	00380806
卷号	60 期号:2 页码:505-519
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
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
DOI	10.1016/j.sandf.2020.03.008
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Geological ; Geosciences, Multidisciplinary
WOS记录号	WOS:000543370000015
出版者	Elsevier B.V., Netherlands
EI入藏号	20201808608225
EI主题词	Shrinkage
EI分类号	482.2 Minerals - 802.3 Chemical Operations - 951 Materials Science
来源库	Compendex
分类代码	482.2 Minerals - 802.3 Chemical Operations - 951 Materials Science
引用统计	被引频次：14[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/115411
专题	土木工程学院
通讯作者	Zhang, Huyuan
作者单位	1.Lanzhou Univ, Sch Civil Engn & Mech, Lanzhou 730000, Peoples R China; 2.Lanzhou Univ, Minist Educ, Key Lab Mech Disaster & Environm Western China, Lanzhou 730000, Peoples R China; 3.Lanzhou Univ Technol, Sch Civil Engn, Lanzhou 730050, Peoples R 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.