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Effects of clay content on the volumetric behavior of loess under heating-cooling cycles

文献类型：期刊论文

作者Mu Qing-yi1; Ng Charles Wang-wai4; Zhou Chao3; Zhou Gordon Gong-dan2
刊名JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A
出版日期2019
卷号20期号:12页码:979-990
关键词Loess Volumetric behavior Clay mineral Heating-cooling cycles
ISSN号1673-565X
DOI10.1631/jzus.A1900274
产权排序4
通讯作者Zhou, Chao(c.zhou@polyu.edu.hk)
文献子类Article
英文摘要Although numerous studies have been carried out on investigating thermal volume changes in different soils, limited attention has been paid to loess. This study aims to investigate the effects of clay content on the deformation of loess under heating-cooling cycles. Three soils with different clay contents (i.e. SA: 7%; SB: 13%; SC: 35%) were prepared with loess collected in situ through the sedimentation method. The soil volume changes were measured under heating-cooling cycles by using a thermal invar oedometer. To interpret the experimental results, X-ray diffraction (XRD) and scanning electron microscope (SEM) tests were conducted to identify the composition and microstructure of tested soils, respectively. The results show that the plastic axial strains of SA, SB, and SC accumulate to a certain level with the increasing number of heating-cooling cycles. At the stable state, the plastic axial strain of SC is 264% and 52% larger than those of SA and SB, respectively. On the other hand, the linear thermal expansion coefficient of SC is 66% and 20% larger than those of SA and SB, respectively. As evidenced from the XRD test, the clay in loess mainly contains kaolinite, chlorite, and illite, while the composition of silt is dominated by quartz. The clay minerals are more sensitive to thermal fluctuations than quartz because of the electrical double layer. SC, whose clay content is deliberately enhanced, exhibits a larger plastic axial strain and linear thermal expansion coefficient than do SA and SB.
电子版国际标准刊号1862-1775
WOS关键词SATURATED CLAYS ; UNFROZEN WATER ; LANDFILL COVER ; VOID RATIO ; SUCTIONS ; MODEL ; SAND
资助项目Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS)[QYZDB-SSW-DQC010] ; Youth Innovation Promotion Association, CAS ; Research Grants Council of the Hong Kong Special Administrative Region[16204817] ; Research Grants Council of the Hong Kong Special Administrative Region[16207417] ; Research Grants Council of the Hong Kong Special Administrative Region[AoE/E-603/18] ; National Natural Science Foundation of China[51909205] ; China Postdoctoral Science Foundation[2018M631166] ; China Postdoctoral Science Foundation[2019T120914]
WOS研究方向Engineering ; Physics
语种英语
WOS记录号WOS:000511683500007
出版者ZHEJIANG UNIV
资助机构Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS) ; Youth Innovation Promotion Association, CAS ; Research Grants Council of the Hong Kong Special Administrative Region ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation
源URL[http://ir.imde.ac.cn/handle/131551/33884]  
专题成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
通讯作者Zhou Chao
作者单位1.Department of Civil Engineering, Xi'an Jiaotong University, Xi'an 710049, China;
2.Key Laboratory of Mountain Hazards and Earth Surface Process, Chinese Academy of Sciences (CAS), Chengdu 610041, China
3.Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China;
4.Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong 999077, China;
推荐引用方式
GB/T 7714		 Mu Qing-yi,Ng Charles Wang-wai,Zhou Chao,et al. Effects of clay content on the volumetric behavior of loess under heating-cooling cycles[J]. JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A,2019,20(12):979-990.
APA Mu Qing-yi,Ng Charles Wang-wai,Zhou Chao,&Zhou Gordon Gong-dan.(2019).Effects of clay content on the volumetric behavior of loess under heating-cooling cycles.JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A,20(12),979-990.
MLA Mu Qing-yi,et al."Effects of clay content on the volumetric behavior of loess under heating-cooling cycles".JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A 20.12(2019):979-990.

入库方式： OAI收割

来源：成都山地灾害与环境研究所

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