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Salt crystallization in porous construction materials II. Mass transport and crystallization processes

López-Acevedo Cornejo, Victoria and Viedma Molero, Cristóbal and González García, Victoria and La Iglesia Fernández , Ángel (1997) Salt crystallization in porous construction materials II. Mass transport and crystallization processes. Journal of Crystal Growth , 182 . pp. 103-110. ISSN 0022-0248

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Abstract

In order to study the processes of salt weathering of monumental stones, several samples were partially immersed in
sodium, potassium and magnesium sulphate solutions which ascended through their capillary network and, eventually,
crystallized. This procedure pretends to simulate the conditions in which foundations and lower walls of building
structures are, within the zone of capillary rise of saline groundwater. Mass transport and the rhythmic nature of
crystallization fronts inside samples reminds the Liesegang phenomenon, so they have been considered as a form of
dissipative structures. The saline deposits developed on the surface of the samples were efflorescences (mirabilite and
epsomite), subefflorescences (picromerite, aphthitalite and arcanite) and crusts (aphthitalite and arcanite). The most
devastating effects resulted from massive crystallization inside the samples or from surface peeling due to the development
of subefflorescences or crusts.

Item Type:Article
Uncontrolled Keywords:Salt weathering; Salt crystallization; Porous media; Dissipative structures
Subjects:Sciences > Geology > Crystallography
ID Code:16508
Deposited On:24 Sep 2012 10:06
Last Modified:24 Sep 2012 10:06

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