A new procedure to measure effective molecular diffusion coefficients of salts solutions in building materials

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

J. M. P. Q. Delgado (Autor) FEUP

Revista

Título: HEAT AND MASS TRANSFER

Vol. 49 Nº 6

Páginas: 809-815

ISSN: 0947-7411

Indexação

ISI Web of Knowledge - 0 Citações

ISI Web of Science

Scopus - 0 Citações

INSPEC

Classificação Científica

FOS: Ciências da engenharia e tecnologias

Outras Informações

ID Authenticus: P-005-0BQ

DOI: 10.1007/s00231-013-1127-x

Abstract (EN): The aim of this work is to present a mathematical and experimental formulation of a new simple procedure for the measurement of effective molecular diffusion coefficients of a salt solution in a water-saturated building material. This innovate experimental procedure and mathematical formulation is presented in detail and experimental values of ``effective¿¿ molecular diffusion coefficient of sodium chloride in a concrete sample (w/c = 0.45), at five different temperatures (between 10 and 30 C) and four different initial NaCl concentrations (between 0.1 and 0.5 M), are reported. The experimental results obtained are in good agreement with the theoretical and experimental values of molecular diffusion coefficient presented in literature. An empirical correlation is presented for the prediction of ``effective¿¿ molecular diffusion coefficient over the entire range of temperatures and initial salt concentrations studied.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7