The effect of undrained heating on a fluid-saturated hardened cement paste / Siavash Ghabezloo in Cement and concrete research, Vol. 39 N° 1 (Janvier 2009)  

Public ISBD [article]  inCement and concrete research > Vol. 39 N° 1 (Janvier 2009) . - pp. 54–64 Titre : The effect of undrained heating on a fluid-saturated hardened cement paste Type de document : texte imprimé Auteurs : Siavash Ghabezloo, Auteur ; Jean Sulem, Auteur ; Jérémie Saint-Marc, Auteur Année de publication : 2009 Article en page(s) : pp. 54–64 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Hardened cement paste  Thermo-poro-elasticity  Thermal pressurization  Pore pressure  expansion Résumé : The effect of undrained heating on volume change and induced pore pressure increase is an important point to properly understand the behaviour and evaluate the integrity of an oil well cement sheath submitted to rapid temperature changes. This thermal pressurization of the pore fluid is due to the discrepancy between the thermal expansion coefficients of the pore fluid and of the solid matrix. The equations governing the undrained thermo-hydro-mechanical response of a porous material are presented and the effect of undrained heating is studied experimentally for a saturated hardened cement paste. The measured value of the thermal pressurization coefficient is equal to 0.6 MPa/°C. The drained and undrained thermal expansion coefficients of the hardened cement paste are also measured in the heating tests. The anomalous thermal behaviour of cement paste pore fluid is back analysed from the results of the undrained heating test. ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884608001762 [article] The effect of undrained heating on a fluid-saturated hardened cement paste [texte imprimé] / Siavash Ghabezloo, Auteur ; Jean Sulem, Auteur ; Jérémie Saint-Marc, Auteur . - 2009 . - pp. 54–64. Génie Civil Langues : Anglais (eng) in Cement and concrete research > Vol. 39 N° 1 (Janvier 2009) . - pp. 54–64 Mots-clés : Hardened cement paste  Thermo-poro-elasticity  Thermal pressurization  Pore pressure  expansion Résumé : The effect of undrained heating on volume change and induced pore pressure increase is an important point to properly understand the behaviour and evaluate the integrity of an oil well cement sheath submitted to rapid temperature changes. This thermal pressurization of the pore fluid is due to the discrepancy between the thermal expansion coefficients of the pore fluid and of the solid matrix. The equations governing the undrained thermo-hydro-mechanical response of a porous material are presented and the effect of undrained heating is studied experimentally for a saturated hardened cement paste. The measured value of the thermal pressurization coefficient is equal to 0.6 MPa/°C. The drained and undrained thermal expansion coefficients of the hardened cement paste are also measured in the heating tests. The anomalous thermal behaviour of cement paste pore fluid is back analysed from the results of the undrained heating test. ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884608001762

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