Study on effect of pore structure on the permeability of concrete after a century natural carbonation - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Asian Architecture and Building Engineering Année : 2022

Study on effect of pore structure on the permeability of concrete after a century natural carbonation

Résumé

The durability of concrete is determined by its pore structure and permeability. The present work examines the effect of pore structure and porosity on the permeability of concrete after nearly a century natural carbonation. The samples were cored from a concrete building built in 1931. X-ray diffraction analysis, phenolphthalein dye test, Mercury Intrusion Porosimetry (MIP) were conducted to ascertain the composition, the carbonation depth, the permeability, the porosity and pore size distribution of samples. The experimental results revealed that the front of core samples was completely carbonated. The fractal dimension was calculated using the Mandelbrot model to characterize the pore structure. The combined harmless and less harmless pore proportions exhibited a linear correlation with the fractal dimension. A relationship between permeability and fractal dimension is established. The increase in the fractal dimension resulted in a gradual decrease in the oxygen diffusion coefficient. The diffusion coefficient tends to plateau when the fractal dimension exceeds a critical value of the combined pore proportion. While the pore proportion of concrete was higher than 14.64%, there was no significant effect on the permeability. The results of this study can serve for future assessments of concrete durability.
Fichier principal
Vignette du fichier
Study on effect of pore structure on the permeability of concrete after a century natural carbonation.pdf (8.71 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-04219833 , version 1 (27-09-2023)

Identifiants

Citer

Yunyun Tong, Zhixiang Li, Mengya Li, Jiong Wang, Abdel-Okash Seibou, et al.. Study on effect of pore structure on the permeability of concrete after a century natural carbonation. Journal of Asian Architecture and Building Engineering, 2022, 22 (5), pp.2867-2875. ⟨10.1080/13467581.2022.2160642⟩. ⟨hal-04219833⟩
7 Consultations
4 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More