Documents disponibles écrits par cet auteur

Behaviour of slag cement concrete under restraint conditions / Aveline Darquennes in European journal of environmental and civil engineering, Vol. 15 N° 5 (Mai 2011) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 15 N° 5 (Mai 2011) . - pp. 787-798 Titre : Behaviour of slag cement concrete under restraint conditions Type de document : texte imprimé Auteurs : Aveline Darquennes, Auteur ; Stéphanie Staquet, Auteur ; Bernard Espion, Auteur Année de publication : 2011 Article en page(s) : pp. 787-798 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Blended  cement  Cracking  Creep  Relaxation  TSTM Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Some constructions built with slag cement concrete exhibit cracking at early age due to restrained shrinkage. To determine the slag effect on cracking, this study focuses on the autogenous deformation evolution of concretes characterized by different percentages of slag (0 and 42% of the binder mass) under free and restraint conditions by means of the TSTM device (Temperature Stress Testing Machine). Despite the fast kinetics of its autogenous deformation, the cracking appears later for the slag cement concrete than for the Portland cement concrete. This behaviour is related to the swelling of its cementitious matrix at early age and its large capacity for relaxing the stresses. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16148 [article] Behaviour of slag cement concrete under restraint conditions [texte imprimé] / Aveline Darquennes, Auteur ; Stéphanie Staquet, Auteur ; Bernard Espion, Auteur . - 2011 . - pp. 787-798. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 15 N° 5 (Mai 2011) . - pp. 787-798 Mots-clés : Blended  cement  Cracking  Creep  Relaxation  TSTM Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Some constructions built with slag cement concrete exhibit cracking at early age due to restrained shrinkage. To determine the slag effect on cracking, this study focuses on the autogenous deformation evolution of concretes characterized by different percentages of slag (0 and 42% of the binder mass) under free and restraint conditions by means of the TSTM device (Temperature Stress Testing Machine). Despite the fast kinetics of its autogenous deformation, the cracking appears later for the slag cement concrete than for the Portland cement concrete. This behaviour is related to the swelling of its cementitious matrix at early age and its large capacity for relaxing the stresses. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16148

Determination of time-zero and its effect on autogenous deformation evolution / Aveline Darquennes in European journal of environmental and civil engineering, Vol. 15 N° 7 (Août 2011) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 15 N° 7 (Août 2011) . - pp. 1017-1029 Titre : Determination of time-zero and its effect on autogenous deformation evolution Type de document : texte imprimé Auteurs : Aveline Darquennes, Auteur ; Stéphanie Staquet, Auteur ; Bernard Espion, Auteur Année de publication : 2011 Article en page(s) : pp. 1017-1029 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Kelly-Bryant  method  Setting  Shrinkage  Slag  cement  Resistivity  Ultrasonic  wave Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : The aim of this study is the determination of time-zero, a reference time from which the autogenous deformation is expressed, and the effect of this choice on the evolution of autogeneous deformation of concretes with different slag proportions (0 and 71%). The determination of time-zero is based on the setting evolution measured by means of several experimental methods (mechanical, electrical and ultrasonic). Autogenous deformation is also measured with a new shrinkage testing set-up developed at the Université Libre de Bruxelles. Following the experimental results it appears that a time-zero equal to the final setting is the most adequate choice for classic concretes. For slag cement concretes, characterized by an expansion of their cement matrix at early age, time-zero should be taken equal to the time of the expansion peak. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16504 [article] Determination of time-zero and its effect on autogenous deformation evolution [texte imprimé] / Aveline Darquennes, Auteur ; Stéphanie Staquet, Auteur ; Bernard Espion, Auteur . - 2011 . - pp. 1017-1029. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 15 N° 7 (Août 2011) . - pp. 1017-1029 Mots-clés : Kelly-Bryant  method  Setting  Shrinkage  Slag  cement  Resistivity  Ultrasonic  wave Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : The aim of this study is the determination of time-zero, a reference time from which the autogenous deformation is expressed, and the effect of this choice on the evolution of autogeneous deformation of concretes with different slag proportions (0 and 71%). The determination of time-zero is based on the setting evolution measured by means of several experimental methods (mechanical, electrical and ultrasonic). Autogenous deformation is also measured with a new shrinkage testing set-up developed at the Université Libre de Bruxelles. Following the experimental results it appears that a time-zero equal to the final setting is the most adequate choice for classic concretes. For slag cement concretes, characterized by an expansion of their cement matrix at early age, time-zero should be taken equal to the time of the expansion peak. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16504