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Author(s): J. M. P. Q. Delgado
Title: A new procedure to measure effective molecular diffusion coefficients of salts solutions in building materials
Issue Date: 2013
Abstract: The aim of this work is to present a mathematicaland experimental formulation of a new simpleprocedure for the measurement of effective moleculardiffusion coefficients of a salt solution in a water-saturatedbuilding material. This innovate experimental procedureand mathematical formulation is presented in detail andexperimental values of effective molecular diffusioncoefficient of sodium chloride in a concrete sample(w/c = 0.45), at five different temperatures (between 10and 30 C) and four different initial NaCl concentrations(between 0.1 and 0.5 M), are reported. The experimentalresults obtained are in good agreement with the theoreticaland experimental values of molecular diffusion coefficientpresented in literature. An empirical correlation is presentedfor the prediction of effective molecular diffusioncoefficient over the entire range of temperatures and initialsalt concentrations studied.
Subject: Ciências da engenharia e tecnologias
Engineering and technology
Scientific areas: Ciências da engenharia e tecnologias
Engineering and technology
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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