Damage due to salt crystallization in porous media

We investigate salt crystallization in porous media that can lead to their disintegration. For sodium sulfate we show for the first time experimentally that when anhydrous crystals are wetted with water, there is very rapid growth of the hydrated form of sulfate in clusters that nucleate on anhydrou...

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Bibliographic Details
Published in:arXiv.org 2009-06
Main Authors: Bonn, Noushine Shahidzadeh, Bertrand, Francois, Bonn, Daniel
Format: Article
Language:English
Subjects:
Clusters
Crystallization
Crystals
Disintegration
Molar volume
Porous materials
Porous media
Sodium sulfate
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Summary:We investigate salt crystallization in porous media that can lead to their disintegration. For sodium sulfate we show for the first time experimentally that when anhydrous crystals are wetted with water, there is very rapid growth of the hydrated form of sulfate in clusters that nucleate on anhydrous salt micro crystals. The molar volume of the hydrated crystals being four times bigger, the growth of these clusters can generate stresses in excess of the tensile strength of the stone and lead therefore to damage.
ISSN:2331-8422