Salt Weathering of Natural Stone: A Review of Comparative Laboratory Studies

Natural stone is an important component of historical heritage (buildings and art objects such as sculptures or rock engravings), and it is still widely used in contemporary works. Soluble salts are the main erosive agent in the built environment, and we review here comparative studies that subject...

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Main Authors: Carlos Alves, Carlos A. M. Figueiredo, Jorge Sanjurjo-Sánchez, Ana C. Hernández
Format: Article
Language:English
Published: MDPI AG 2021-08-01
Series:Heritage
Subjects:
Online Access:https://www.mdpi.com/2571-9408/4/3/86
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author Carlos Alves
Carlos A. M. Figueiredo
Jorge Sanjurjo-Sánchez
Ana C. Hernández
author_facet Carlos Alves
Carlos A. M. Figueiredo
Jorge Sanjurjo-Sánchez
Ana C. Hernández
author_sort Carlos Alves
collection DOAJ
description Natural stone is an important component of historical heritage (buildings and art objects such as sculptures or rock engravings), and it is still widely used in contemporary works. Soluble salts are the main erosive agent in the built environment, and we review here comparative studies that subject the same rock type to testing with different salt solutions. The results mostly support the accepted notion of the major impact of sodium sulphate, although there are some exceptions. The effects of sodium chloride and calcium sulphate deserve specific discussion given field information on the relevance of these specific salts in the built environment. We relate the information collected to the issues of risk assessment (considering both geochemical conditions and salt effects) and conservation interventions (highlighting the interest of tests that do not produce damage to susceptible materials) and present some methodological suggestions to avoid a case study culture.
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spelling doaj.art-b798dba825a4494d9723a2e8c8f908912023-11-22T13:19:50ZengMDPI AGHeritage2571-94082021-08-01431554156510.3390/heritage4030086Salt Weathering of Natural Stone: A Review of Comparative Laboratory StudiesCarlos Alves0Carlos A. M. Figueiredo1Jorge Sanjurjo-Sánchez2Ana C. Hernández3LandS/Lab2PT-Landscapes, Heritage and Territory Laboratory (FCT-UIDB/04509/2020), Earth Sciences Department, School of Sciences, University of Minho, 4710-057 Braga, PortugalCERENA—Centre for Natural Resources and the Environment, FCT-UIDB/04028/2020, DEcivil, Instituto Superior Técnico, University of Lisbon, 1049-001 Lisbon, PortugalUniversity Institute of Geology, University of A Coruña, ESCI, Campus de Elviña, 15071 A Coruña, SpainUniversity Institute of Geology, University of A Coruña, ESCI, Campus de Elviña, 15071 A Coruña, SpainNatural stone is an important component of historical heritage (buildings and art objects such as sculptures or rock engravings), and it is still widely used in contemporary works. Soluble salts are the main erosive agent in the built environment, and we review here comparative studies that subject the same rock type to testing with different salt solutions. The results mostly support the accepted notion of the major impact of sodium sulphate, although there are some exceptions. The effects of sodium chloride and calcium sulphate deserve specific discussion given field information on the relevance of these specific salts in the built environment. We relate the information collected to the issues of risk assessment (considering both geochemical conditions and salt effects) and conservation interventions (highlighting the interest of tests that do not produce damage to susceptible materials) and present some methodological suggestions to avoid a case study culture.https://www.mdpi.com/2571-9408/4/3/86water–stone interactionstone erosionlaboratory simulationhazards studiesmaterials conservationreplication
spellingShingle Carlos Alves
Carlos A. M. Figueiredo
Jorge Sanjurjo-Sánchez
Ana C. Hernández
Salt Weathering of Natural Stone: A Review of Comparative Laboratory Studies
Heritage
water–stone interaction
stone erosion
laboratory simulation
hazards studies
materials conservation
replication
title Salt Weathering of Natural Stone: A Review of Comparative Laboratory Studies
title_full Salt Weathering of Natural Stone: A Review of Comparative Laboratory Studies
title_fullStr Salt Weathering of Natural Stone: A Review of Comparative Laboratory Studies
title_full_unstemmed Salt Weathering of Natural Stone: A Review of Comparative Laboratory Studies
title_short Salt Weathering of Natural Stone: A Review of Comparative Laboratory Studies
title_sort salt weathering of natural stone a review of comparative laboratory studies
topic water–stone interaction
stone erosion
laboratory simulation
hazards studies
materials conservation
replication
url https://www.mdpi.com/2571-9408/4/3/86
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