Microcracking of granite feldspar during thermal artificial processes

Granite is one of the most widely used building stone and is a main component in many heritage buildings for its austere appearance and its availability as a stone of the Earth´s crust. When exposed at the Earth’s surface, thermal changes are responsible for its decay, especially in granites exposed...

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Autores: Freire, D. M., Gómez Villalba, Luz Stella, Fort González, Rafael
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2015
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/126230
Acesso em linha:http://hdl.handle.net/10261/126230
Access Level:acceso abierto
Palavra-chave:Physical disintegration
Feldspars
Thermal shock
Freeze-thaw
Building stones
Decay
Weathering
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spelling Microcracking of granite feldspar during thermal artificial processesFreire, D. M.Gómez Villalba, Luz StellaFort González, RafaelPhysical disintegrationFeldsparsThermal shockFreeze-thawBuilding stonesDecayWeatheringGranite is one of the most widely used building stone and is a main component in many heritage buildings for its austere appearance and its availability as a stone of the Earth´s crust. When exposed at the Earth’s surface, thermal changes are responsible for its decay, especially in granites exposed to weathering. Feldspars, an important component of granite mineralogy, are among the most likely crystalline phases susceptible to microcracking, which, in turn, causes the disintegration of crystals lattices. Microcracks generated in granite feldspars during thermal processes such as freeze-thaw and thermal shock cycles, carried out in the laboratory, were studied to understand the decay process of granite buildings. The aim of this study is to determine microcrack propagation (both as inter- and intra-crystalline microcracks types) within feldspars (potassium feldspars and plagioclases) of two building granites located near the city of Madrid (Spain). Potassium feldspars and plagioclases developed different mechanisms of microcracking, probably, due to their microstructures and/or driven, preferentially, by crystallographic anisotropies such as twinning and zoning of the precursor mineral, and neoformation of secondary mineral phases at the expense of a primary mineral phase. By combining petrographic analysis of the studied granite stones, with physical laboratory tests (thermal shock and freeze-thaw tests), we outlined the evolution of microcracking in order to identify the potential problems that disintegration may cause to stone monuments and buildings.Peer reviewedUniversità degli studi di Roma "La Sapienza"Edizioni Nuova CulturaComunidad de MadridConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201520152015info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/126230reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#S2013/MIT-2914/ GEOMATERIALES 2http://periodicodimineralogia.it/index.php/mineralogia/article/view/432Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1262302026-05-22T06:33:51Z
dc.title.none.fl_str_mv Microcracking of granite feldspar during thermal artificial processes
title Microcracking of granite feldspar during thermal artificial processes
spellingShingle Microcracking of granite feldspar during thermal artificial processes
Freire, D. M.
Physical disintegration
Feldspars
Thermal shock
Freeze-thaw
Building stones
Decay
Weathering
title_short Microcracking of granite feldspar during thermal artificial processes
title_full Microcracking of granite feldspar during thermal artificial processes
title_fullStr Microcracking of granite feldspar during thermal artificial processes
title_full_unstemmed Microcracking of granite feldspar during thermal artificial processes
title_sort Microcracking of granite feldspar during thermal artificial processes
dc.creator.none.fl_str_mv Freire, D. M.
Gómez Villalba, Luz Stella
Fort González, Rafael
author Freire, D. M.
author_facet Freire, D. M.
Gómez Villalba, Luz Stella
Fort González, Rafael
author_role author
author2 Gómez Villalba, Luz Stella
Fort González, Rafael
author2_role author
author
dc.contributor.none.fl_str_mv Comunidad de Madrid
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Physical disintegration
Feldspars
Thermal shock
Freeze-thaw
Building stones
Decay
Weathering
topic Physical disintegration
Feldspars
Thermal shock
Freeze-thaw
Building stones
Decay
Weathering
description Granite is one of the most widely used building stone and is a main component in many heritage buildings for its austere appearance and its availability as a stone of the Earth´s crust. When exposed at the Earth’s surface, thermal changes are responsible for its decay, especially in granites exposed to weathering. Feldspars, an important component of granite mineralogy, are among the most likely crystalline phases susceptible to microcracking, which, in turn, causes the disintegration of crystals lattices. Microcracks generated in granite feldspars during thermal processes such as freeze-thaw and thermal shock cycles, carried out in the laboratory, were studied to understand the decay process of granite buildings. The aim of this study is to determine microcrack propagation (both as inter- and intra-crystalline microcracks types) within feldspars (potassium feldspars and plagioclases) of two building granites located near the city of Madrid (Spain). Potassium feldspars and plagioclases developed different mechanisms of microcracking, probably, due to their microstructures and/or driven, preferentially, by crystallographic anisotropies such as twinning and zoning of the precursor mineral, and neoformation of secondary mineral phases at the expense of a primary mineral phase. By combining petrographic analysis of the studied granite stones, with physical laboratory tests (thermal shock and freeze-thaw tests), we outlined the evolution of microcracking in order to identify the potential problems that disintegration may cause to stone monuments and buildings.
publishDate 2015
dc.date.none.fl_str_mv 2015
2015
2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/126230
url http://hdl.handle.net/10261/126230
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
S2013/MIT-2914/ GEOMATERIALES 2
http://periodicodimineralogia.it/index.php/mineralogia/article/view/432
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Università degli studi di Roma "La Sapienza"
Edizioni Nuova Cultura
publisher.none.fl_str_mv Università degli studi di Roma "La Sapienza"
Edizioni Nuova Cultura
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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