Microstructural insight into the nonlinear swelling of argillaceous rocks
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| Titel: | Microstructural insight into the nonlinear swelling of argillaceous rocks |
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| Autoren: | Wang, L.L., Bornert, Michel, Yang, D.S., Héripré, E., Chanchole, S., Halphen, B., Pouya, A., Caldemaison, D. |
| Weitere Verfasser: | Documentation, Navier, Chinese Academy of Agricultural Sciences (CAAS), Laboratoire Navier (navier umr 8205), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École nationale des ponts et chaussées (ENPC)-Centre National de la Recherche Scientifique (CNRS), Département Réseaux et Services de Télécommunications (TSP - RST), Institut Mines-Télécom Paris (IMT)-Télécom SudParis (TSP), Services répartis, Architectures, MOdélisation, Validation, Administration des Réseaux (SAMOVAR), Centre National de la Recherche Scientifique (CNRS), Laboratoire de Mécanique des Solides (LMS), École polytechnique (X), Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes et d'Expertise sur les Risques, l'Environnement, la Mobilité et l'Aménagement - Direction Infrastructures de Transport et Matériaux (Cerema Direction ITM), Centre d'Etudes et d'Expertise sur les Risques, l'Environnement, la Mobilité et l'Aménagement (Cerema) |
| Quelle: | Engineering Geology. 193:435-444 |
| Verlagsinformationen: | Elsevier BV, 2015. |
| Publikationsjahr: | 2015 |
| Schlagwörter: | [SPI.GCIV.GEOTECH]Engineering Sciences [physics]/Civil Engineering/Géotechnique, Heterogeneous strain field, Digital image correlation, 0211 other engineering and technologies, 02 engineering and technology, 01 natural sciences, Environmental scanning electron microscopy, 12. Responsible consumption, [SPI.GCIV]Engineering Sciences [physics]/Civil Engineering, 13. Climate action, Argillaceous rocks, [SPI.GCIV.GEOTECH] Engineering Sciences [physics]/Civil Engineering/Géotechnique, [SPI.GCIV] Engineering Sciences [physics]/Civil Engineering, Nonlinear swelling, 0105 earth and related environmental sciences |
| Beschreibung: | Argillaceous rocks are chosen as possible host rocks for underground radioactive nuclear waste disposal. These rocks exhibit complex coupled thermo–hydro–chemo-mechanical behavior, the description of which would strongly benefit from an improved experimental insight on micro-scale. In this work we present some recent observations of the evolution of these rocks upon swelling on the scale of their composite microstructure, essentially made of a clay matrix with embedded grains of calcite and quartz with sizes ranging from a few to several hundreds of micrometers. The micro-scale experimental investigation was based on the combination of high definition and high resolution imaging in an environmental scanning electron microscope (ESEM) and digital image correlation techniques. Samples were held at a constant temperature of 2 °C while the vapor pressure in the ESEM chamber was varied from a few to several hundreds of Pascals, generating a relative humidity (RH) ranging from about 10% up to 99%. Results on micro-scale showed strongly heterogeneous deformation fields, which result from complex hydromechanical interactions between different components of argillaceous rocks. The swelling of argillaceous rocks is moderate at low RH but becomes significant at high RH. The observations demonstrated that the nonlinearity is related not only to the micro-cracking upon wetting, but also to the nonlinear swelling of the clay matrix itself that is governed by different mechanisms. |
| Publikationsart: | Article |
| Sprache: | English |
| ISSN: | 0013-7952 |
| DOI: | 10.1016/j.enggeo.2015.05.019 |
| Zugangs-URL: | https://www.sciencedirect.com/science/article/pii/S0013795215001738 https://cel.archives-ouvertes.fr/X-LMS/hal-01286263v1 https://hal-enpc.archives-ouvertes.fr/hal-01286263 https://enpc.hal.science/hal-01286263v1 https://doi.org/10.1016/j.enggeo.2015.05.019 |
| Rights: | Elsevier TDM |
| Dokumentencode: | edsair.doi.dedup.....7eeced60c3d1c994c46b808d1c04bf0f |
| Datenbank: | OpenAIRE |
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Nájsť tento článok vo Web of Science | Abstract: | Argillaceous rocks are chosen as possible host rocks for underground radioactive nuclear waste disposal. These rocks exhibit complex coupled thermo–hydro–chemo-mechanical behavior, the description of which would strongly benefit from an improved experimental insight on micro-scale. In this work we present some recent observations of the evolution of these rocks upon swelling on the scale of their composite microstructure, essentially made of a clay matrix with embedded grains of calcite and quartz with sizes ranging from a few to several hundreds of micrometers. The micro-scale experimental investigation was based on the combination of high definition and high resolution imaging in an environmental scanning electron microscope (ESEM) and digital image correlation techniques. Samples were held at a constant temperature of 2 °C while the vapor pressure in the ESEM chamber was varied from a few to several hundreds of Pascals, generating a relative humidity (RH) ranging from about 10% up to 99%. Results on micro-scale showed strongly heterogeneous deformation fields, which result from complex hydromechanical interactions between different components of argillaceous rocks. The swelling of argillaceous rocks is moderate at low RH but becomes significant at high RH. The observations demonstrated that the nonlinearity is related not only to the micro-cracking upon wetting, but also to the nonlinear swelling of the clay matrix itself that is governed by different mechanisms. |
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| ISSN: | 00137952 |
| DOI: | 10.1016/j.enggeo.2015.05.019 |