Please use this identifier to cite or link to this item: https://hdl.handle.net/10216/101579
Author(s): N. M. M. Ramos
J. M. P. Q. Delgado
V. P. Freitas
Title: Anomalous diffusion during water absorption in porous building materials - experimental evidence
Issue Date: 2008
Abstract: The sorption and transport of water in two porous building materials, clay brick and autoclaved aerated concrete, was studied in detail. The evolution of the distribution of liquid in the porous medium was analysed in terms of the Boltzmann transform method and anomalous diffusion equation proposed by Küntz and Lavallée [1]. The apparent moisture diffusion coefficients of water were determined from the total water profiles using a modified Boltzmann-Matano analysis, and a good agreement with literature values was found. The application of anomalous diffusion model to building materials indicates that the previous 1/ 2 t relation is not entirely accurate to estimate the volume of absorbed water. This result has particular relevance for evaluating the durability of building structures.
Subject: Engenharia civil, Outras ciências da engenharia e tecnologias
Civil engineering, Other engineering and technologies
Scientific areas: Ciências da engenharia e tecnologias::Outras ciências da engenharia e tecnologias
Engineering and technology::Other engineering and technologies
URI: https://hdl.handle.net/10216/101579
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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