[article] inCement and concrete research > Vol. 39 N° 6 (Juin 2009) . - pp. 537–547
Titre : |
Crack effects on gas and water permeability of concretes |
Type de document : |
texte imprimé |
Auteurs : |
Vincent Picandet, Auteur ; Abdelhafid Khelidj, Auteur ; Hervé Bellegou, Auteur |
Année de publication : |
2009 |
Article en page(s) : |
pp. 537–547 |
Note générale : |
Génie Civil |
Langues : |
Anglais (eng) |
Mots-clés : |
Permeability Microcracking Durability High-performance oncrete Fiber reinforcement |
Résumé : |
The relationship between load-induced cracking and concrete permeability is studied. Ordinary concrete (OC) and high-performance concrete (HPC), including steel fiber-reinforced concrete (HPFRC), are used. Two discs, 50 mm-thick slices, cut from 110–220 mm cylindrical specimens are diametrically loaded, as for a normal splitting test. The lateral displacement, also called the crack opening displacement (COD) is monitored for each loading cycle. After unloading, gas and finally water permeability tests are both performed, using constant head permeameter, to compare the influence of the percolating fluid and the COD. Due to the wide range of measured gas flow, Klinkenberg's and Dupuit-Forcheimer's laws are applied to compute the intrinsic gas permeability. Results suggest it increases proportionally to the cube of the COD and it matches water permeability, if only the first water percolating time is considered. The roughness parameter of the cracks induced in each concrete, is compared and discussed. |
REFERENCE : |
0008-8846 |
En ligne : |
http://www.sciencedirect.com/science/article/pii/S0008884609000696 |
[article] Crack effects on gas and water permeability of concretes [texte imprimé] / Vincent Picandet, Auteur ; Abdelhafid Khelidj, Auteur ; Hervé Bellegou, Auteur . - 2009 . - pp. 537–547. Génie Civil Langues : Anglais ( eng) in Cement and concrete research > Vol. 39 N° 6 (Juin 2009) . - pp. 537–547
Mots-clés : |
Permeability Microcracking Durability High-performance oncrete Fiber reinforcement |
Résumé : |
The relationship between load-induced cracking and concrete permeability is studied. Ordinary concrete (OC) and high-performance concrete (HPC), including steel fiber-reinforced concrete (HPFRC), are used. Two discs, 50 mm-thick slices, cut from 110–220 mm cylindrical specimens are diametrically loaded, as for a normal splitting test. The lateral displacement, also called the crack opening displacement (COD) is monitored for each loading cycle. After unloading, gas and finally water permeability tests are both performed, using constant head permeameter, to compare the influence of the percolating fluid and the COD. Due to the wide range of measured gas flow, Klinkenberg's and Dupuit-Forcheimer's laws are applied to compute the intrinsic gas permeability. Results suggest it increases proportionally to the cube of the COD and it matches water permeability, if only the first water percolating time is considered. The roughness parameter of the cracks induced in each concrete, is compared and discussed. |
REFERENCE : |
0008-8846 |
En ligne : |
http://www.sciencedirect.com/science/article/pii/S0008884609000696 |
|