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| HAL : hal-00349363, version 1 |
| arXiv : 0812.4938 |
| DOI : 10.1016/j.geoderma.2008.10.012 |
| Fiche détaillée |  Récupérer au format |
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| Geoderma 148, 3-4 (2009) 282-290 |
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| Analysing the form of the confined uniaxial compression curve of various soils |
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| Anh-Minh Tang 1, 2Yu-Jun Cui 1, 2 |
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| (15/01/2009) |
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| The soil compaction by vehicles is a major factor responsible for physical degradation of cultivated soils. Uniaxial confined compression tests are usually performed to characterise the compaction properties of soil. Two main forms of compression curve have been observed: (i) the bi-linear curve having an elastic rebound curve at low stresses and a linear virgin compression curve at higher stresses; (ii) the S-shaped curve having deviation of the virgin compression curve at high stresses. In the present work, uniaxial confined compression tests were performed on four soils having various textures and different plasticity. Tests were performed on undisturbed and remould samples, at various initial dry bulk densities and water contents. The S-shaped compression curves were observed more frequently when the clay content and/or the initial water content were high. In addition, the S-shaped curves were observed more frequently on remould soils than on undisturbed soils. The difference between the compression of air-filled pores and that of meso-pores storing water subjected to high capillary forces could explain the observed S-shaped curves. |
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| 1 : | Centre d'enseignement et de recherche en mécanique des sols (ENPC-CERMES) |
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LCPC – Institut Navier – Ecole des Ponts ParisTech |
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| 2 : | Laboratoire Navier |
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Ecole des Ponts ParisTech – CNRS : UMR8205 – IFSTTAR |
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| 3 : | Institut National de la Recherche Agronomique (INRA) |
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Ministère de la recherche – Ministère de l'agriculture |
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| Domaine | : | Sciences de l'ingénieur/Mécanique/Mécanique des matériaux Physique/Mécanique/Mécanique des matériaux |
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| Agricultural soil – confined uniaxial compression test – compression curve – bulk density – water content – compression index. |
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| Liste des fichiers attachés à ce document : | |||||
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| hal-00349363, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00349363 | |
| oai:hal.archives-ouvertes.fr:hal-00349363 | |
| Contributeur : Yu-Jun Cui | |
| Soumis le : Lundi 29 Décembre 2008, 17:45:19 | |
| Dernière modification le : Dimanche 8 Février 2009, 18:54:10 | |
