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Porewater salinity effect on flocculation and desiccation cracking behaviour of kaolin and bentonite considering working condition
Zhang, Tongwei1,2,3; Deng, Yongfeng3; Cui, Yujun4; Lan, Hengxing5,6; Zhang, Fanyu1,2; Zhang, Huyuan1,2
2019-03-09
Source PublicationENGINEERING GEOLOGY
ISSN0013-7952
Volume251Pages:11-23
Corresponding AuthorDeng, Yongfeng(noden@seu.edu.cn)
AbstractCracking 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.
KeywordClay mineral Pore water salinity Flocculation Desiccation crack Wetting-drying cycle
DOI10.1016/j.enggeo.2019.02.007
WOS KeywordSOIL ; CLAY ; COMPRESSIBILITY ; MECHANISMS ; PROPAGATION ; SHRINKAGE ; STRENGTH ; NETWORK ; PREDICT ; MODEL
Indexed BySCI
Language英语
Funding ProjectNational 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]
Funding OrganizationNational Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities
WOS Research AreaEngineering ; Geology
WOS SubjectEngineering, Geological ; Geosciences, Multidisciplinary
WOS IDWOS:000464480600002
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/48166
Collection中国科学院地理科学与资源研究所
Corresponding AuthorDeng, Yongfeng
Affiliation1.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
Recommended Citation
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.
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