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Journal of Materials Science
Published in: Journal of Materials Science 6/2015

01-03-2015 | Original Paper

The mechanisms of plaster drying

Authors: M. D. Seck, M. Van Landeghem, P. Faure, S. Rodts, R. Combes, P. Cavalié, E. Keita, P. Coussot

Published in: Journal of Materials Science | Issue 6/2015

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Abstract

We show that the drying rate of plaster pastes is significantly lower than that expected for a pure liquid evaporating from a simple homogeneous porous medium. This effect is enhanced by the air flow velocity and the initial solid/water ratio. Further tests under various conditions and with the help of additional techniques (MRI, ESEM, Micro-tomography) for measuring the drying rate and local characteristics (water content, porosity) prove that this effect is due to the crystallization of gypsum ions below the sample free surface, which creates a dry region and decreases the drying rate by increasing the length of the path that the vapour has to follow before reaching the free surface.
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Metadata
Title
The mechanisms of plaster drying
Authors
M. D. Seck
M. Van Landeghem
P. Faure
S. Rodts
R. Combes
P. Cavalié
E. Keita
P. Coussot
Publication date
01-03-2015
Publisher
Springer US
Published in
Journal of Materials Science / Issue 6/2015
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-014-8807-x

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