Porewater salinity effect on flocculation and desiccation cracking behaviour of kaolin and bentonite considering working condition

doi:10.1016/j.enggeo.2019.02.007

	Porewater salinity effect on flocculation and desiccation cracking behaviour of kaolin and bentonite considering working condition
	Zhang, Tongwei 1,2,3; Deng, Yongfeng 3; Cui, Yujun 4; Lan, Hengxing 5,6; Zhang, Fanyu 1,2; Zhang, Huyuan 1,2
刊名	ENGINEERING GEOLOGY
	2019-03-09
卷号	251 页码:11-23
关键词	Clay mineral Pore water salinity Flocculation Desiccation crack Wetting-drying cycle
ISSN号	0013-7952
DOI	10.1016/j.enggeo.2019.02.007
通讯作者	Deng, Yongfeng(noden@seu.edu.cn)
英文摘要	Cracking behaviour of clays at a local working climate and soils' evolution under seepage boundary is very important for the geological engineering. In coastal regions, pore water salinity is incorporated into above processes. In this study, the properties of typical clays (kaolin and bentonite) in saline environments, including the consistency limits, particle sedimentation and crack pattern, were investigated. The consistency limits of kaolin remain constant regardless of the pore water salinity, while the liquid limits of bentonite noticeably decrease with increasing salinity. Flocculation of kaolin occurs in both distilled water and NaCl solution, whereas the fine particles in bentonite disperse in distilled water but aggregate in saline water. At the end of the evaporation process, the total crack area of bentonite is obviously decreased, and the total crack length increases with pore water salinity, whilst that of kaolin is not influenced. In the subsequent wetting process, the bentonite clods disperse easily in saline environment, but the collapse of kaolin clods is not significantly influenced by the water salinity. The above observations are explained by the initial aggregation of clay platelets for the interactive forces between particles.
资助项目	National Natural Science Foundation of China[41807225] ; National Natural Science Foundation of China[41572280] ; National Natural Science Foundation of China[51378117] ; Fundamental Research Funds for the Central Universities[lzujbky-2018-8]
WOS关键词	SOIL ; CLAY ; COMPRESSIBILITY ; MECHANISMS ; PROPAGATION ; SHRINKAGE ; STRENGTH ; NETWORK ; PREDICT ; MODEL
WOS研究方向	Engineering ; Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000464480600002
资助机构	National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/48165]
专题	中国科学院地理科学与资源研究所
通讯作者	Deng, Yongfeng
作者单位	1.Lanzhou Univ, Sch Civil Engn & Mech, Lanzhou, Gansu, Peoples R China 2.Lanzhou Univ, Key Lab Mech Disaster & Environm Western China, MOE, Lanzhou, Gansu, Peoples R China 3.Southeast Univ, Inst Geotech Engn, Sch Transportat, Nanjing, Jiangsu, Peoples R China 4.Ecole Ponts ParisTech, CERMES, Lab Navier, Marne La Vallee, France 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China 6.Changan Univ, Sch Geol Engn & Geomat, Xian 710064, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Tongwei,Deng, Yongfeng,Cui, Yujun,et al. Porewater salinity effect on flocculation and desiccation cracking behaviour of kaolin and bentonite considering working condition[J]. ENGINEERING GEOLOGY,2019,251:11-23.
APA	Zhang, Tongwei,Deng, Yongfeng,Cui, Yujun,Lan, Hengxing,Zhang, Fanyu,&Zhang, Huyuan.(2019).Porewater salinity effect on flocculation and desiccation cracking behaviour of kaolin and bentonite considering working condition.ENGINEERING GEOLOGY,251,11-23.
MLA	Zhang, Tongwei,et al."Porewater salinity effect on flocculation and desiccation cracking behaviour of kaolin and bentonite considering working condition".ENGINEERING GEOLOGY 251(2019):11-23.