Measuring the change in ultrasonic p-wave energy transmitted in fresh mortar with additives to monitor the setting / Nicolas Robeyst in Cement and concrete research, Vol. 39 N° 10 (Octobre 2009)  

Public ISBD [article]  inCement and concrete research > Vol. 39 N° 10 (Octobre 2009) . - pp. 868–875 Titre : Measuring the change in ultrasonic p-wave energy transmitted in fresh mortar with additives to monitor the setting Type de document : texte imprimé Auteurs : Nicolas Robeyst, Auteur ; Christian U. Grosse, Auteur ; Nele de Belie, Auteur Année de publication : 2009 Article en page(s) : pp. 868–875 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Ultrasonic  Fresh concrete (A)  Granulated blast-furnace slag (D)  Fly ash Admixture (D) Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : Research on ultrasonic methods to monitor the setting of concrete has mainly focussed on the wave velocity as a useful quantity. To investigate the application of also the wave energy as a parameter, an experimental program was set up to apply the ultrasonic wave transmission technique on several mortar samples containing air entrainer, blast-furnace slag or fly ash causing clearly different setting behaviour. The increase of the relative energy E/Eref during setting is generally retarded if ordinary Portland cement is replaced by blast-furnace slag or fly ash. The mixtures with cement of a lower strength class or with large air content were difficult to test with the energy measurements since they were more sensitive to poor sensor contact due to shrinkage. For the other samples, the thresholds E/Eref = 0.02 and 0.13 are proposed to easily determine respectively initial and final setting based on the ultrasonic energy measurements. DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609001471 [article] Measuring the change in ultrasonic p-wave energy transmitted in fresh mortar with additives to monitor the setting [texte imprimé] / Nicolas Robeyst, Auteur ; Christian U. Grosse, Auteur ; Nele de Belie, Auteur . - 2009 . - pp. 868–875. Génie Civil Langues : Anglais (eng) in Cement and concrete research > Vol. 39 N° 10 (Octobre 2009) . - pp. 868–875 Mots-clés : Ultrasonic  Fresh concrete (A)  Granulated blast-furnace slag (D)  Fly ash Admixture (D) Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : Research on ultrasonic methods to monitor the setting of concrete has mainly focussed on the wave velocity as a useful quantity. To investigate the application of also the wave energy as a parameter, an experimental program was set up to apply the ultrasonic wave transmission technique on several mortar samples containing air entrainer, blast-furnace slag or fly ash causing clearly different setting behaviour. The increase of the relative energy E/Eref during setting is generally retarded if ordinary Portland cement is replaced by blast-furnace slag or fly ash. The mixtures with cement of a lower strength class or with large air content were difficult to test with the energy measurements since they were more sensitive to poor sensor contact due to shrinkage. For the other samples, the thresholds E/Eref = 0.02 and 0.13 are proposed to easily determine respectively initial and final setting based on the ultrasonic energy measurements. DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609001471

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Measuring the change in ultrasonic p-wave energy transmitted in fresh mortar with additives to monitor the setting / Nicolas Robeyst in Cement and concrete research, Vol. 39 N° 10 (Octobre 2009)  

Public ISBD [article]  inCement and concrete research > Vol. 39 N° 10 (Octobre 2009) . - pp. 868–875 Titre : Measuring the change in ultrasonic p-wave energy transmitted in fresh mortar with additives to monitor the setting Type de document : texte imprimé Auteurs : Nicolas Robeyst, Auteur ; Christian U. Grosse, Auteur ; Nele de Belie, Auteur Année de publication : 2009 Article en page(s) : pp. 868–875 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Ultrasonic  Fresh concrete (A)  Granulated blast-furnace slag (D)  Fly ash Admixture (D) Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : Research on ultrasonic methods to monitor the setting of concrete has mainly focussed on the wave velocity as a useful quantity. To investigate the application of also the wave energy as a parameter, an experimental program was set up to apply the ultrasonic wave transmission technique on several mortar samples containing air entrainer, blast-furnace slag or fly ash causing clearly different setting behaviour. The increase of the relative energy E/Eref during setting is generally retarded if ordinary Portland cement is replaced by blast-furnace slag or fly ash. The mixtures with cement of a lower strength class or with large air content were difficult to test with the energy measurements since they were more sensitive to poor sensor contact due to shrinkage. For the other samples, the thresholds E/Eref = 0.02 and 0.13 are proposed to easily determine respectively initial and final setting based on the ultrasonic energy measurements. DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609001471 [article] Measuring the change in ultrasonic p-wave energy transmitted in fresh mortar with additives to monitor the setting [texte imprimé] / Nicolas Robeyst, Auteur ; Christian U. Grosse, Auteur ; Nele de Belie, Auteur . - 2009 . - pp. 868–875. Génie Civil Langues : Anglais (eng) in Cement and concrete research > Vol. 39 N° 10 (Octobre 2009) . - pp. 868–875 Mots-clés : Ultrasonic  Fresh concrete (A)  Granulated blast-furnace slag (D)  Fly ash Admixture (D) Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : Research on ultrasonic methods to monitor the setting of concrete has mainly focussed on the wave velocity as a useful quantity. To investigate the application of also the wave energy as a parameter, an experimental program was set up to apply the ultrasonic wave transmission technique on several mortar samples containing air entrainer, blast-furnace slag or fly ash causing clearly different setting behaviour. The increase of the relative energy E/Eref during setting is generally retarded if ordinary Portland cement is replaced by blast-furnace slag or fly ash. The mixtures with cement of a lower strength class or with large air content were difficult to test with the energy measurements since they were more sensitive to poor sensor contact due to shrinkage. For the other samples, the thresholds E/Eref = 0.02 and 0.13 are proposed to easily determine respectively initial and final setting based on the ultrasonic energy measurements. DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609001471

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
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