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| HAL : hal-00527085, version 1 |
| Fiche détaillée |  Récupérer au format |
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| BIOT Conference, NY : États-Unis (2009) |
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| Salt deterioration of porous materials subject to repeated cycles of wetting and drying |
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| Noushine Shahidzadeh-Bonn 1François Bertrand 1 |
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| (2009) |
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| We have investigated the damaging of sandstones in the presence of sodium sulfate during wetting and drying cycles. We have shown that the interfacial properties of the salts play a major role in the process and have elucidated which crystalline phase is responsible for the mechanical damage. We find that damage is due to the transformation of thenardite (anhydrous) to mirabilite (hydrated crystals) during wetting and drying without the complete dissolution of the anhydrous crystals. As the volume change is large, this is likely to be the major cause of the mechanical damage observed in the sandstone. Second, we find that the interfacial properties of the different crystalline phases play a major role on whether the salt solution will effloresce (crystallize on the outer surface of the stone) or subfloresce (crystallize within the stone). |
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| 1 : | Laboratoire Navier |
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Ecole des Ponts ParisTech – CNRS : UMR8205 – IFSTTAR |
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| 2 : | University of Amsterdam Van der Waals-Zeeman Institute (VAN DER WAALS-ZEEMAN INSTITUTE) |
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University of Amsterdam |
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| 3 : | Laboratoire de Physique Statistique de l'ENS (LPS) |
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CNRS : UMR8550 – Université Pierre et Marie Curie [UPMC] - Paris VI – Université Paris VII - Paris Diderot – Ecole normale supérieure de Paris - ENS Paris |
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| Milieux poreux Rhéophysique |
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| Domaine | : | Physique/Mécanique/Mécanique des matériaux Sciences de l'ingénieur/Mécanique/Mécanique des matériaux |
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| porous media – crystallization – sodium sulphate |
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| hal-00527085, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00527085 | |
| oai:hal.archives-ouvertes.fr:hal-00527085 | |
| Contributeur : Noushine Shahidzdadeh-Bonn | |
| Soumis le : Lundi 18 Octobre 2010, 10:10:21 | |
| Dernière modification le : Lundi 18 Octobre 2010, 10:10:21 | |
