Damage due to salt crystallization in porous media

Details Damage due to salt crystallization in porous media Damage due to salt crystallization in porous media

2009-06-13

arxiv.org/abs/0906.2502v1

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

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.

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