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Influence of aggregates and air voids on the ultrasonic velocity and attenuation in cementitious materials / Miguel Molero in European journal of environmental and civil engineering, Vol. 15 N° 4 (Avril 2011) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 15 N° 4 (Avril 2011) . - pp. 501-517 Titre : Influence of aggregates and air voids on the ultrasonic velocity and attenuation in cementitious materials Type de document : texte imprimé Auteurs : Miguel Molero, Auteur ; Ignacio Segura, Auteur ; Sofia Aparicio, Auteur Année de publication : 2011 Article en page(s) : pp. 501-517 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Multiple  scattering  model  Multiphase  material  Velocity  Attenuation  Mortar Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper examines the influence of the size and volume fraction of both aggregates and air voids on the ultrasonic phase velocity and attenuation coefficient measured in cementitious specimens. A multiphase approach of the Waterman-Truell (WT) model was used to study theoretically how the size and volume fraction of the constituents in cementitious materials affect velocity and attenuation profiles. To verify the theoretical results obtained by the model, ultrasonic measurements were performed in several cementitious specimens with different granulometries of elastic aggregates (glass microspheres). Both theoretical and experimental results showed that velocity information can largely identify changes in the volume fraction of aggregates, whereas attenuation information is more sensible to variations in the aggregate size. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16041 [article] Influence of aggregates and air voids on the ultrasonic velocity and attenuation in cementitious materials [texte imprimé] / Miguel Molero, Auteur ; Ignacio Segura, Auteur ; Sofia Aparicio, Auteur . - 2011 . - pp. 501-517. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 15 N° 4 (Avril 2011) . - pp. 501-517 Mots-clés : Multiple  scattering  model  Multiphase  material  Velocity  Attenuation  Mortar Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper examines the influence of the size and volume fraction of both aggregates and air voids on the ultrasonic phase velocity and attenuation coefficient measured in cementitious specimens. A multiphase approach of the Waterman-Truell (WT) model was used to study theoretically how the size and volume fraction of the constituents in cementitious materials affect velocity and attenuation profiles. To verify the theoretical results obtained by the model, ultrasonic measurements were performed in several cementitious specimens with different granulometries of elastic aggregates (glass microspheres). Both theoretical and experimental results showed that velocity information can largely identify changes in the volume fraction of aggregates, whereas attenuation information is more sensible to variations in the aggregate size. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16041