Documents disponibles écrits par cet auteur

On the influence of aggregate nature on concrete behaviour at high temperature / Jean-Christophe Mindeguia in European journal of environmental and civil engineering, Vol. 16 N° 2 (Février 2012) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 16 N° 2 (Février 2012) . - pp. 236-253 Titre : On the influence of aggregate nature on concrete behaviour at high temperature Type de document : texte imprimé Auteurs : Jean-Christophe Mindeguia, Auteur ; Pierre Pimienta, Auteur ; Hélène Carré, Auteur Année de publication : 2012 Article en page(s) : pp. 236-253 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Concrete  Aggregates  Spalling  Temperature  Pressures  Thermomecanical  stresses Résumé : This paper presents some experimental results on the behaviour of concrete at high temperature. The main objective is to analyse the influence of the type of aggregates on several material properties, and particularly upon the thermal instability risk (spalling) of the concrete. Different levels of observations have been chosen: from the study of small elements for the assessment of the main concrete properties at high temperature to the study of slabs to analyse the fire behaviour of the concretes. DEWEY : 624 ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/abs/10.1080/19648189.2012.667682 [article] On the influence of aggregate nature on concrete behaviour at high temperature [texte imprimé] / Jean-Christophe Mindeguia, Auteur ; Pierre Pimienta, Auteur ; Hélène Carré, Auteur . - 2012 . - pp. 236-253. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 16 N° 2 (Février 2012) . - pp. 236-253 Mots-clés : Concrete  Aggregates  Spalling  Temperature  Pressures  Thermomecanical  stresses Résumé : This paper presents some experimental results on the behaviour of concrete at high temperature. The main objective is to analyse the influence of the type of aggregates on several material properties, and particularly upon the thermal instability risk (spalling) of the concrete. Different levels of observations have been chosen: from the study of small elements for the assessment of the main concrete properties at high temperature to the study of slabs to analyse the fire behaviour of the concretes. DEWEY : 624 ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/abs/10.1080/19648189.2012.667682

Temperature, pore pressure and mass variation of concrete subjected to high temperature — Experimental and numerical discussion on spalling risk / Jean-Christophe Mindeguia in Cement and concrete research, Vol. 40 N° 3 (Mars 2010) 

Public ISBD [article]  in Cement and concrete research > Vol. 40 N° 3 (Mars 2010) . - pp. 477–487 Titre : Temperature, pore pressure and mass variation of concrete subjected to high temperature — Experimental and numerical discussion on spalling risk Type de document : texte imprimé Auteurs : Jean-Christophe Mindeguia, Auteur Année de publication : 2012 Article en page(s) : pp. 477–487 Note générale : Bibliogr. Langues : Anglais (eng) Mots-clés : Temperature  ;  Spalling;  Pore  vapour  pressure;  Mass  loss;Fire  behaviour;  Thermomechanical  behaviour Résumé : Spalling at high temperature is a phenomenon that can be observed in different materials such as ceramics, rocks and bricks. For concrete, this phenomenon, considered as a thermal instability of the material, can seriously jeopardize the integrity of a whole structure during fire and can even constitute a risk for people. Many explanations to the spalling risk exist but still no model can accurately predict it. Among them, models based on thermo-hydral behaviour of concrete have been proposed and developed by several authors. In particular, an important role is given to the pore vapour pressure, considered by many authors as the main mechanism for the trigger of such a thermal instability. However, pore vapour pressure is not easy to measure and numerical works still need more experimental results to validate their assumptions regarding the spalling risk. This paper presents the results of an experimental study carried out on five different concrete mixtures. We used a device intended for measuring temperature, pore vapour pressure and mass loss of concrete specimens. The aim of the study was to better understand the thermo-hydral behaviour of concrete exposed to high temperature and the possible link to spalling risk. In particular, we focused on the influence of matrix compactness on the transfer properties of concrete and we discussed about the importance of pore vapour pressure on spalling risk. Moreover, based on our experimental observations, a numerical analysis of the influence of water content on the thermomechanical behaviour of concrete during heating is done. En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609002944 [article] Temperature, pore pressure and mass variation of concrete subjected to high temperature — Experimental and numerical discussion on spalling risk [texte imprimé] / Jean-Christophe Mindeguia, Auteur . - 2012 . - pp. 477–487. Bibliogr. Langues : Anglais (eng) in Cement and concrete research > Vol. 40 N° 3 (Mars 2010) . - pp. 477–487 Mots-clés : Temperature  ;  Spalling;  Pore  vapour  pressure;  Mass  loss;Fire  behaviour;  Thermomechanical  behaviour Résumé : Spalling at high temperature is a phenomenon that can be observed in different materials such as ceramics, rocks and bricks. For concrete, this phenomenon, considered as a thermal instability of the material, can seriously jeopardize the integrity of a whole structure during fire and can even constitute a risk for people. Many explanations to the spalling risk exist but still no model can accurately predict it. Among them, models based on thermo-hydral behaviour of concrete have been proposed and developed by several authors. In particular, an important role is given to the pore vapour pressure, considered by many authors as the main mechanism for the trigger of such a thermal instability. However, pore vapour pressure is not easy to measure and numerical works still need more experimental results to validate their assumptions regarding the spalling risk. This paper presents the results of an experimental study carried out on five different concrete mixtures. We used a device intended for measuring temperature, pore vapour pressure and mass loss of concrete specimens. The aim of the study was to better understand the thermo-hydral behaviour of concrete exposed to high temperature and the possible link to spalling risk. In particular, we focused on the influence of matrix compactness on the transfer properties of concrete and we discussed about the importance of pore vapour pressure on spalling risk. Moreover, based on our experimental observations, a numerical analysis of the influence of water content on the thermomechanical behaviour of concrete during heating is done. En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609002944