Experimental study on sound and damaged ...
Type de document :
Compte-rendu et recension critique d'ouvrage
Titre :
Experimental study on sound and damaged mortar: Variation of ultrasonic parameters with porosity
Auteur(s) :
Lafhaj, Zoubeir [Auteur]
Laboratoire de Mécanique de Lille - FRE 3723 [LML]
Goueygou, Marc [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Laboratoire de Mécanique de Lille - FRE 3723 [LML]
Goueygou, Marc [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Titre de la revue :
Construction and Building Materials
Pagination :
953-958
Éditeur :
Elsevier
Date de publication :
2009
ISSN :
0950-0618
Mot(s)-clé(s) en anglais :
Porosity
Leaching
Ultrasonic
Degradation
Mortar
Leaching
Ultrasonic
Degradation
Mortar
Résumé en anglais : [en]
The relationship between porosity and ultrasonic parameters of mortar was studied. In order to enhance the sensitivity of the ultrasonic wave to microstructural changes, a high frequency range, 0.6–1.2 MHz, was chosen. The ...
Lire la suite >The relationship between porosity and ultrasonic parameters of mortar was studied. In order to enhance the sensitivity of the ultrasonic wave to microstructural changes, a high frequency range, 0.6–1.2 MHz, was chosen. The material investigated consists of four mortar mixtures with water/cement ratio varying from 0.3 to 0.6. Samples were chemically damaged for 4 periods of time (4, 9, 16 and 25 days). All the samples were degraded using a chemically accelerated process with an ammonium nitrate solution. This procedure yields a wide range of porosity values, from 10% to 35%. This growth of porosity was mainly attributed to the portlandite dissolution followed by C–S–H decalcification. The experimental results obtained showed that for sound samples, the correlation between physical and acoustic parameters yields the expected trend: velocity decreases with porosity. Secondly, the increase of porosity with the duration of degradation did not affect this relation between acoustic parameters and porosity where the latter remains linear.Lire moins >
Lire la suite >The relationship between porosity and ultrasonic parameters of mortar was studied. In order to enhance the sensitivity of the ultrasonic wave to microstructural changes, a high frequency range, 0.6–1.2 MHz, was chosen. The material investigated consists of four mortar mixtures with water/cement ratio varying from 0.3 to 0.6. Samples were chemically damaged for 4 periods of time (4, 9, 16 and 25 days). All the samples were degraded using a chemically accelerated process with an ammonium nitrate solution. This procedure yields a wide range of porosity values, from 10% to 35%. This growth of porosity was mainly attributed to the portlandite dissolution followed by C–S–H decalcification. The experimental results obtained showed that for sound samples, the correlation between physical and acoustic parameters yields the expected trend: velocity decreases with porosity. Secondly, the increase of porosity with the duration of degradation did not affect this relation between acoustic parameters and porosity where the latter remains linear.Lire moins >
Langue :
Anglais
Vulgarisation :
Non
Source :
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