SORPTION KINETICS MODEL APPLICATION ON THE MEASUREMENT OF WATER VAPOR PERMEABILITY IN BUILDING MATERIALS

• Type: Article in International Scientific Journal
• Date: 2011

Authors

J.M.P.Q. Delgado (Author) FEUP; Nuno Ramos (Author) FEUP; Vasco Peixoto De Freitas (Author) FEUP

Journal

Title: Journal of Porous Media

Vol. 14

Pages: 565-578

ISSN: 1091-028X

Publisher: Begell House

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-002-X42

DOI: 10.1615/jpormedia.v14.i7.10

Abstract (EN): This work proposes a simple experimental technique that provides a method, based on sorption kinetics, for the measurement of water vapor permeability of building materials. It is a novel method that has the added interest of easily providing data in a few hours using a dynamic process of moisture absorption based on a pseudo-second-order kinetic model. Experimental measurements of water vapor permeability covering four different types of building materials were carried out for a range of the relevant parameters, such as temperature and relative humidity. The experimental results obtained are in good agreement with the experimental values of the water vapor permeability measured by our team and other researchers using the classic standard cup method; and the results showed that the moisture buffer performance, from a different step of relative humidity, can be predicted with the knowledge of previous values and the kinetics parameters specific to a material using the equations proposed in this work.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 14