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A platform for research: civil engineering, architecture and urbanism
Experimental identification of Biot's hydro-mechanical coupling coefficient for cement mortar
Abstract The objective of the present paper is to show an experimental method allowing the characterisation of Biot's hydro-mechanical coupling coefficient for cement mortar. This coefficient results from the mathematical formulation of a thermo-hygro-mechanical coupling model for non-saturated media [3, 8, 9, 11]. In the literature, the expression of Biot's coefficient is based on an empirical formula. The proposed method of its identification is bosed on two experiments: the dimensional variation tests and the characterisation of the elastic properties as a function of different relative humidity. We deduce Biot's coefficient by using the thermal-porous-elastic behaviour law of Coussy [2, 3]. In the literature, liquid Biot's coefficientbl is often approached with the degree of liquid, saturationSl. By comparing the results of liquid Biot's coefficientbl determined experimentally and the coefficient of liquid saturationSl, we show a good agreement between the two coefficients for small to moderate relative humidity. For important relative humidity (i.e. higher than 70%), the value of liquid Biot's coefficient is slightly lower than saturation.
Experimental identification of Biot's hydro-mechanical coupling coefficient for cement mortar
Abstract The objective of the present paper is to show an experimental method allowing the characterisation of Biot's hydro-mechanical coupling coefficient for cement mortar. This coefficient results from the mathematical formulation of a thermo-hygro-mechanical coupling model for non-saturated media [3, 8, 9, 11]. In the literature, the expression of Biot's coefficient is based on an empirical formula. The proposed method of its identification is bosed on two experiments: the dimensional variation tests and the characterisation of the elastic properties as a function of different relative humidity. We deduce Biot's coefficient by using the thermal-porous-elastic behaviour law of Coussy [2, 3]. In the literature, liquid Biot's coefficientbl is often approached with the degree of liquid, saturationSl. By comparing the results of liquid Biot's coefficientbl determined experimentally and the coefficient of liquid saturationSl, we show a good agreement between the two coefficients for small to moderate relative humidity. For important relative humidity (i.e. higher than 70%), the value of liquid Biot's coefficient is slightly lower than saturation.
Experimental identification of Biot's hydro-mechanical coupling coefficient for cement mortar
Obeid, W. (author) / Mounajed, G. (author) / Alliche, A. (author)
2002
Article (Journal)
English
Experimental identification of Biot's hydro-mechanical coupling coefficient for cement mortar
| British Library Online Contents | 2002
Experimental identification of Biot's hydro-mechanical coupling coefficient for cement mortar
| Springer Verlag | 2002