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Book Chapter

Contribution to the technological characterization of two widely used Portuguese dimension stones: the ‘Semi-rijo’ and ‘Moca Creme’ stones

By
Carlos Figueiredo
Carlos Figueiredo
Center of Petrology and Geochemistry, CEPGIST, IST, Av. Rovisco Pais, 1049-001, Lisbon, Portugal
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Rita Folha
Rita Folha
Center of Petrology and Geochemistry, CEPGIST, IST, Av. Rovisco Pais, 1049-001, Lisbon, Portugal
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António Maurício
António Maurício
Center of Petrology and Geochemistry, CEPGIST, IST, Av. Rovisco Pais, 1049-001, Lisbon, Portugal
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Carlos Alves
Carlos Alves
University of Minho, Centro de Investigação Geológica e Valorização de Recursos, DCT, Gualtar, 4710-057 Braga, Portugal
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Luís Aires-Barros
Luís Aires-Barros
Center of Petrology and Geochemistry, CEPGIST, IST, Av. Rovisco Pais, 1049-001, Lisbon, Portugal
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Published:
January 01, 2010

Abstract

Stone weathering and durability are two major concerns widely recognized within construction, cultural heritage and monument stone decay assessment and conservation works. This paper aims to complement the technological data on the two commercial varieties of Portuguese dimension stones (‘Semi-rijo’ and ‘Moca Creme’), widely used in pavement and cladding inside and outside buildings. New data on the pore structures (fluid transport–related properties) and the durability (salt crystallization tests) of these limestones are presented. The pore structure was studied by a combined application of optical microscopy, scanning electron microscopy and mercury injection porosimetry. Fluid migration physical tests (open and free porosity, capillary imbibition and Hirschwald coefficient) were also performed, according to Portuguese and French standards. The resistance to salt crystallization was determined using the Portuguese standard NP EN 12370. An integrated analysis of all data has allowed a comparison of the results of the durability tests with characteristics of the pore network and properties related to fluid transport as well as petrographical features of the stones. The open porosity and freely-interconnected pores accessible to water after 48 hours (N48) seem to be the main features controlling their durability.

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Contents

Geological Society, London, Special Publications

Natural Stone Resources for Historical Monuments

R Přikryl
R Přikryl
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Á Török
Á Török
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Geological Society of London
Volume
333
ISBN electronic:
9781862395817
Publication date:
January 01, 2010

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