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

• Type: Article in International Scientific Journal
• Date: 2013

Authors

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

Journal

Title: HEAT AND MASS TRANSFER

Vol. 49 No. 6

Pages: 809-815

ISSN: 0947-7411

Indexing

ISI Web of Knowledge - 0 Citations

ISI Web of Science

Scopus - 0 Citations

INSPEC

Scientific classification

FOS: Engineering and technology

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7