Investigation into the compression behaviour of unsaturated damaged Callovo-Oxfordian claystone
In this study, the compression behaviour of unsaturated damaged COx claystone is investigated by performing high pressure oedometer tests with controlled suction. The damaged oedometer samples were prepared by shearing the claystone in triaxial conditions. Four high pressure oedometer tests were con...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2023-01-01
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| Series: | E3S Web of Conferences |
| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/19/e3sconf_unsat2023_25008.pdf |
| _version_ | 1797835356536569856 |
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| author | Wang Hao Cui Yu-Jun Vu Minh-Ngoc Talandier Jean |
| author_facet | Wang Hao Cui Yu-Jun Vu Minh-Ngoc Talandier Jean |
| author_sort | Wang Hao |
| collection | DOAJ |
| description | In this study, the compression behaviour of unsaturated damaged COx claystone is investigated by performing high pressure oedometer tests with controlled suction. The damaged oedometer samples were prepared by shearing the claystone in triaxial conditions. Four high pressure oedometer tests were conducted using different controlled suctions. The effects of suction and damage on the swelling and compression were investigated in oedometer. Results show that the intact claystone exhibits a larger swelling strain than that of the damaged one at the same imposed suction. The damaged claystone at a lower suction displays a smaller yield stress and higher compressibility, and exhibits a larger compression index Cc than the intact one, evidencing the effect of damage. In addition, the step compression index Cc* increases with the increase of vertical stress, while deceases with the decrease of suction. This indicates the dependencies of compression behaviour on vertical stress and suction. |
| first_indexed | 2024-04-09T14:51:43Z |
| format | Article |
| id | doaj.art-1b986056c82b442cbcdf2efb25b0056d |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-04-09T14:51:43Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-1b986056c82b442cbcdf2efb25b0056d2023-05-02T09:28:10ZengEDP SciencesE3S Web of Conferences2267-12422023-01-013822500810.1051/e3sconf/202338225008e3sconf_unsat2023_25008Investigation into the compression behaviour of unsaturated damaged Callovo-Oxfordian claystoneWang Hao0Cui Yu-Jun1Vu Minh-Ngoc2Talandier Jean3Ecole des Ponts ParisTech, Laboratoire Navier/CERMES, 6 et 8 avenue Blaise Pascal, 77455 Marne La Vallée cedex 2Ecole des Ponts ParisTech, Laboratoire Navier/CERMES, 6 et 8 avenue Blaise Pascal, 77455 Marne La Vallée cedex 2Andra, R&D Department, 92290Andra, R&D Department, 92290In this study, the compression behaviour of unsaturated damaged COx claystone is investigated by performing high pressure oedometer tests with controlled suction. The damaged oedometer samples were prepared by shearing the claystone in triaxial conditions. Four high pressure oedometer tests were conducted using different controlled suctions. The effects of suction and damage on the swelling and compression were investigated in oedometer. Results show that the intact claystone exhibits a larger swelling strain than that of the damaged one at the same imposed suction. The damaged claystone at a lower suction displays a smaller yield stress and higher compressibility, and exhibits a larger compression index Cc than the intact one, evidencing the effect of damage. In addition, the step compression index Cc* increases with the increase of vertical stress, while deceases with the decrease of suction. This indicates the dependencies of compression behaviour on vertical stress and suction.https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/19/e3sconf_unsat2023_25008.pdf |
| spellingShingle | Wang Hao Cui Yu-Jun Vu Minh-Ngoc Talandier Jean Investigation into the compression behaviour of unsaturated damaged Callovo-Oxfordian claystone E3S Web of Conferences |
| title | Investigation into the compression behaviour of unsaturated damaged Callovo-Oxfordian claystone |
| title_full | Investigation into the compression behaviour of unsaturated damaged Callovo-Oxfordian claystone |
| title_fullStr | Investigation into the compression behaviour of unsaturated damaged Callovo-Oxfordian claystone |
| title_full_unstemmed | Investigation into the compression behaviour of unsaturated damaged Callovo-Oxfordian claystone |
| title_short | Investigation into the compression behaviour of unsaturated damaged Callovo-Oxfordian claystone |
| title_sort | investigation into the compression behaviour of unsaturated damaged callovo oxfordian claystone |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/19/e3sconf_unsat2023_25008.pdf |
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