Journal
MATERIALS CHARACTERIZATION
Volume 59, Issue 10, Pages 1371-1385Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2007.12.003
Keywords
limestone; sulfate solutions; fluid transport; microfissures; chemical attack
Categories
Funding
- Andalusian Research Group [RNM-0179]
- Junta de Andalucia
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This paper presents a multidisciplinary approach to characterize, at both micro- and macro-scales, the behavior of a limestone widely used as construction material in South Spain when interacting with single- and mixed sulfate solutions of differing concentrations. A salt crystallization test that depicts the reality occurring in bottom walls of buildings was used to establish the related decay morphologies and weathering mechanisms. A systematic chemical, mineralogical, petrographic and porosimetric analysis of the fresh and weathered stones, the crystallized salts, and the evolution of ion concentrations of the solutions was performed. Factors controlling the type of fluid transport within the stone and its eventual breakdown were investigated and discussed. Concentrated solutions caused the most intense damage through chemical weathering and crystallization of salts causing a disrupting effect. Simple solutions caused more salt damage than did mixed solutions. This information will enable long-term predictions of material behavior and stone deterioration in buildings. (C) 2007 Elsevier Inc. All rights reserved.
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