Experimental microscopic investigation of the cyclic swelling and shrinkage of a natural hard clay
文献类型：期刊论文
| 作者 | Yang, Diansen2,3; Chen, Weizhong2,3; Wang, Linlin4; Chen, Liufeng1; Wang, Wei2,3 |
| 刊名 | GEOTECHNIQUE
 |
| 出版日期 | 2019-06-01 |
| 卷号 | 69期号:6页码:481-488 |
| 关键词 | anisotropy clays deformation laboratory tests radioactive waste disposal |
| ISSN号 | 0016-8505 |
| DOI | 10.1680/jgeot.17.P.053 |
| 英文摘要 | In this paper, a microscopic experimental investigation of the swelling-shrinkage behaviour of a hard clay subjected to wetting and drying (W-D) cycles is presented. Three W-D cycles with a range of relative humidity from 20 to 98% were performed on the hard clay sample through varying the temperature and the vapour pressure in an environmental scanning electron microscope (ESEM). The obtained ESEM images of the material at different hydric stages were analysed using a digital image correlation method, and full-field strains at the micrometre scale were quantified. The results show that the deformation of the material when subjected to W-D cycles is significantly heterogeneous and it is closely related to its microstructure. The different contributions of clay particles and of inclusions to swelling and shrinkage of the hard clay are revealed: the clay minerals swell, which is, however, constrained by the no-swelling inclusions; the interaction between the different phases is significant. A residual swelling is found at the end of the first W-D cycle. The residual swelling continues to accumulate during the second cycle but becomes stable for the third cycle. Further microstructural analysis shows that the irreversible swelling can be mainly attributed to the appearance and propagation of microcracks accompanied by a limited unrecoverable deformation of the clay minerals. |
| 资助项目 | Chinese Fundamental Research (973) Program[2015CB057906] ; Hubei Provincial Natural Science Foundation of China[2018CFA012] ; Science Foundation of China University of Petroleum, Beijing[2462018BJC002] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000472137100002 |
| 出版者 | ICE PUBLISHING |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/8196]  |
| 专题 | 中国科学院武汉植物园 |
| 通讯作者 | Yang, Diansen |
| 作者单位 | 1.Wuhan Univ, Sch Civil & Architectural Engn, Wuhan, Hubei, Peoples R China 2.Chinese Acad Sci, IRSM, State Key Lab Geomech & Geotech Engn, Wuhan, Hubei, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.China Univ Petr, Coll Petr Engn, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Diansen,Chen, Weizhong,Wang, Linlin,et al. Experimental microscopic investigation of the cyclic swelling and shrinkage of a natural hard clay[J]. GEOTECHNIQUE,2019,69(6):481-488. |
| APA | Yang, Diansen,Chen, Weizhong,Wang, Linlin,Chen, Liufeng,&Wang, Wei.(2019).Experimental microscopic investigation of the cyclic swelling and shrinkage of a natural hard clay.GEOTECHNIQUE,69(6),481-488. |
| MLA | Yang, Diansen,et al."Experimental microscopic investigation of the cyclic swelling and shrinkage of a natural hard clay".GEOTECHNIQUE 69.6(2019):481-488. |
入库方式： OAI收割
来源：武汉植物园
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