Micro-scale experimental investigation of the swelling anisotropy of the Callovo-Oxfordian argillaceous rock
| Autor: | Michel Bornert, Linlin Wang, D. Caldemaison, Diansen Yang, S. Chanchole, Arnaud Tanguy, Eva Héripré |
|---|---|
| Přispěvatelé: | Laboratoire de mécanique des solides (LMS), École polytechnique (X)-MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Modélisation et expérimentation multi-échelle pour les solides hétérogènes (multi-échelle), Laboratoire Navier (navier umr 8205), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS), State Laboratory of Geomechanics and Geotechnical Engineering, IRSM, Chinese Academy of Science, 430071 Wuhan, China, affiliation inconnue |
| Rok vydání: | 2013 |
| Předmět: |
Digital image correlation
Materials science 010504 meteorology & atmospheric sciences environmental scanning electron microscopy 0208 environmental biotechnology Mineralogy 02 engineering and technology 01 natural sciences [SPI.MAT]Engineering Sciences [physics]/Materials Geochemistry and Petrology Bed Perpendicular medicine digital image correlation Anisotropy Environmental scanning electron microscope radioactive waste repository 0105 earth and related environmental sciences local strain field geomechanics Plane (geometry) Isotropy argillaceous rocks 020801 environmental engineering anisotropic swelling Swelling medicine.symptom |
| Zdroj: | Clay Minerals Clay Minerals, Mineralogical Society, 2013, 48 (2), pp.391-402. ⟨10.1180/claymin.2013.048.2.17⟩ |
| ISSN: | 1471-8030 0009-8558 |
| DOI: | 10.1180/claymin.2013.048.2.17 |
| Popis: | International audience; An experimental study of the swelling anisotropy of the Callovo-Oxfordian argillaceous rock under hydration is presented. The investigation, which combines environmental scanning electron microscopy (ESEM) and digital image correlation techniques, has been carried out at the micrometric scale of the composite microstructure of the rock. Specimens were hydrated in the ESEM over a wide range of relative humidity and observations conducted on two planes: plane 1 parallel to the bedding plane, and plane 2 perpendicular to it. The observations reveal that the local swelling (which can be quantified at a local gauge length of about 5 µm) is strongly anisotropic in both planes. The global swelling, measured over areas of about 500 µm in width, is also clearly anisotropic in plane 2 (with major swelling direction normal to the bedding plane), but not in plane 1. The global isotropy in plane 1 arises from the uniform distribution of the orientation of anisotropic local strains, while the anisotropic swelling in plane 2 is due to a preferred local orientation. © 2013 Mineralogical Society. |
| Databáze: | OpenAIRE |
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