Detection of chemical damage in concrete ...
Type de document :
Compte-rendu et recension critique d'ouvrage
Titre :
Detection of chemical damage in concrete using ultrasound
Auteur(s) :
Ould Naffa, S. [Auteur]
Goueygou, Marc [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Piwakowski, Bogdan [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Buyle-Bodin, François [Auteur]
Laboratoire de Mécanique de Lille - FRE 3723 [LML]
Goueygou, Marc [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Piwakowski, Bogdan [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Buyle-Bodin, François [Auteur]
Laboratoire de Mécanique de Lille - FRE 3723 [LML]
Titre de la revue :
Ultrasonics
Pagination :
247-251
Éditeur :
Elsevier
Date de publication :
2002
ISSN :
0041-624X
Mot(s)-clé(s) en anglais :
Concrete
Degradation
High-frequency ultrasound
Ultrasonic pulse velocity
Attenuation measurement
Degradation
High-frequency ultrasound
Ultrasonic pulse velocity
Attenuation measurement
Résumé en anglais : [en]
This research deals with a non-destructive method for characterizing the degraded cover of concrete structures using high-frequency ultrasound (0.5–1 MHz). Although such a frequency range is unusual in civil engineering, ...
Lire la suite >This research deals with a non-destructive method for characterizing the degraded cover of concrete structures using high-frequency ultrasound (0.5–1 MHz). Although such a frequency range is unusual in civil engineering, it is well suited to the kind of defect to be detected, as it corresponds to a thin near-to-surface layer with increased porosity and density of microcracks. In order to assess the feasibility of detecting concrete cover degradation, velocity and attenuation measurements were made on both halves of a concrete slab. One half was immersed into an acid solution for 15–45 days, while the other half remained sound. These measurements were made for longitudinal, transverse and surface waves. The results obtained show a 23% decrease of ultrasonic pulse velocity and a 1000% increase of attenuation in the degraded material relative to the sound material. It is thus possible to detect and characterize concrete cover degradation using high-frequency ultrasound. Although attenuation measurements in heterogeneous media are difficult, their sensitivity to degradation is very high.Lire moins >
Lire la suite >This research deals with a non-destructive method for characterizing the degraded cover of concrete structures using high-frequency ultrasound (0.5–1 MHz). Although such a frequency range is unusual in civil engineering, it is well suited to the kind of defect to be detected, as it corresponds to a thin near-to-surface layer with increased porosity and density of microcracks. In order to assess the feasibility of detecting concrete cover degradation, velocity and attenuation measurements were made on both halves of a concrete slab. One half was immersed into an acid solution for 15–45 days, while the other half remained sound. These measurements were made for longitudinal, transverse and surface waves. The results obtained show a 23% decrease of ultrasonic pulse velocity and a 1000% increase of attenuation in the degraded material relative to the sound material. It is thus possible to detect and characterize concrete cover degradation using high-frequency ultrasound. Although attenuation measurements in heterogeneous media are difficult, their sensitivity to degradation is very high.Lire moins >
Langue :
Anglais
Vulgarisation :
Non
Source :
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