Effect of wetting-drying cycles on mortar samples affected by DEF / N. Leklou in European journal of environmental and civil engineering, Vol. 16 N° 5 (Mai 2012)  

Public ISBD [article]  inEuropean journal of environmental and civil engineering > Vol. 16 N° 5 (Mai 2012) . - pp. 582-588 Titre : Effect of wetting-drying cycles on mortar samples affected by DEF Type de document : texte imprimé Auteurs : N. Leklou, Auteur ; J.-E. Aubert, Auteur ; G. Escadeillas, Auteur Année de publication : 2012 Article en page(s) : pp. 582-588 Note générale : Génie Civil Langues : Français (fre) Mots-clés : Wetting-drying cycles Microcracks Scanning electron microscopy (SEM) Replica Delayed ettringite formation (DEF) Expansion Résumé : This article, which deals with the effect of wetting–drying (W-D) cycles on materials affected by delayed ettringite formation (DEF), has two main objectives. The first is to observe whether W-D cycles pre-damage samples, by using the replica technique. Scanning electron microscopy (SEM) observations of replicas show that W-D cycles lead to microcracks in the samples. The second objective of the study is to observe whether the cycles are necessary for development of DEF or if they only accelerate DEF. A study of the expansion of the samples shows that cycles accelerate the appearance of expansion but they are not a prerequisite for triggering DEF. DEWEY : 624 ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/abs/10.1080/19648189.2012.668017 [article] Effect of wetting-drying cycles on mortar samples affected by DEF [texte imprimé] / N. Leklou, Auteur ; J.-E. Aubert, Auteur ; G. Escadeillas, Auteur . - 2012 . - pp. 582-588. Génie Civil Langues : Français (fre) in European journal of environmental and civil engineering > Vol. 16 N° 5 (Mai 2012) . - pp. 582-588 Mots-clés : Wetting-drying cycles Microcracks Scanning electron microscopy (SEM) Replica Delayed ettringite formation (DEF) Expansion Résumé : This article, which deals with the effect of wetting–drying (W-D) cycles on materials affected by delayed ettringite formation (DEF), has two main objectives. The first is to observe whether W-D cycles pre-damage samples, by using the replica technique. Scanning electron microscopy (SEM) observations of replicas show that W-D cycles lead to microcracks in the samples. The second objective of the study is to observe whether the cycles are necessary for development of DEF or if they only accelerate DEF. A study of the expansion of the samples shows that cycles accelerate the appearance of expansion but they are not a prerequisite for triggering DEF. DEWEY : 624 ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/abs/10.1080/19648189.2012.668017

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