Numerical and experimental analysis of chemical dehydration, heat and mass transfers in a concrete hollow cylinder submitted to high temperatures |
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Authors: | S.Dal Pont A. Ehrlacher |
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Affiliation: | a Laboratoire d’Analyse des Matériaux et Identification, Ecole Nationale des Ponts et Chaussées, ENPC-LAMI, 6 et 8, Av. B.Pascal, Cité Descartes, 77455 Marne La Vallée Cedex 2, France b Dipartimento di Costruzioni e Trasporti, Universitá di Padova, via Marzolo 9, 35131 Padova, Italy |
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Abstract: | This paper presents a thermo-hydro-chemical model for concrete at high temperatures. Non-linear phenomena, heat and mass transfers, evolution of the phases constituting the porous medium are taken into account in a full three phases coupled analysis. The proposed model does not take into account mechanical aspects, i.e. the solid skeleton is considered as rigid. An experimental set-up and a numerical simulation are also presented. A hollow cylinder has been heated up to 523.15 K (250 °C) on the internal side and submitted to gas pressure/temperature measurements. A numerical simulation of the cylinder has been performed, showing a good correlation with the experimental observations. |
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Keywords: | Numerical and experimental analysis Heat and mass transfers Chemical dehydration Concrete hollow cylinder |
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