Thermal effect of high temperatures on the physical and mechanical properties of a granite used in the UNESCO World Heritage of the north of Portugal

Please use this identifier to cite or link to this item: http://hdl.handle.net/10045/115630
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dc.contributorIngeniería del Terreno y sus Estructuras (InTerEs)es_ES
dc.contributorPetrología Aplicadaes_ES
dc.contributor.authorTomás, Roberto-
dc.contributor.authorCano, Miguel-
dc.contributor.authorPulgarín Canaval, Luis Fernando-
dc.contributor.authorBrotons, Vicente-
dc.contributor.authorBenavente, David-
dc.contributor.authorMiranda, Tiago-
dc.contributor.authorVasconcelos, Graça-
dc.contributor.otherUniversidad de Alicante. Departamento de Ingeniería Civiles_ES
dc.contributor.otherUniversidad de Alicante. Departamento de Ciencias de la Tierra y del Medio Ambientees_ES
dc.date.accessioned2021-06-10T07:48:27Z-
dc.date.available2021-06-10T07:48:27Z-
dc.date.issued2021-06-09-
dc.identifier.citationJournal of Building Engineering. 2021, 43: 102823. https://doi.org/10.1016/j.jobe.2021.102823es_ES
dc.identifier.issn2352-7102-
dc.identifier.urihttp://hdl.handle.net/10045/115630-
dc.description.abstractThis work discusses the results from a set of physical and mechanical test conducted on 46 cubic samples of a granite from the north of Portugal widely used in local granite-built UNESCO World Heritage, heated in a furnace at temperatures ranging from 105 to 700º C and cooled under different conditions. Then, the obtained results are compared with an extensive database of published case studies, showing that porosity, unit weight, ultrasonic waves velocities, elastic modulus and uniaxial compressive stress variations are mostly related to the induced thermal-stress caused by the anisotropic thermal expansion of the mineral grains. Only mineralogy and specific gravity do not exhibit changes for the studied range of temperatures. For specimens heated to above 500ºC, degradation processes predominate due to alpha-beta phase transition in quartz grains, considerably increasing the linear crack density, length and width and reducing the rock properties. Regarding the influence of the cooling method, thermal effects are amplified when cooling is performed by water immersion because of the inhomogeneous shrinkage and the subsequent tension stress between adjacent particles due to temperature decrease that develop at different pace within the samples. Scanning electron microscopy confirms the increase of damage and the negative effect on the granite properties caused by thermal treatment from 500ºC and by water cooling. For temperatures lower than 500ºC a hardening effect slightly improving elastic modulus and uniaxial compressive strength is observed in slowly and quickly cooled samples. The derived conclusions considerably improve the knowledge about the behaviour against temperature of this type of granite, with the purpose of evaluating the integrity level of granite-built UNESCO cultural heritage of the north of Portugal.es_ES
dc.description.sponsorshipThis work was partially funded by the University of Alicante (vigrob-157 Project, GRE17-011 and UAUSTI18-21, UAUSTI19-25 and UAUSTI20-20 projects), the Regional Governments of Comunidad Valenciana AICO/2020/175, the Spanish Ministry of Economy and Competitiveness (MINECO) and EU FEDER under Project TEC2017-85244-C2-1-P, the Spanish Ministry of Education, Culture and Sport under project CAS17/00392 and the Spanish Ministry of Science, Innovation and Universities project RTI2018-099052-BI00.es_ES
dc.languageenges_ES
dc.publisherElsevieres_ES
dc.rights© 2021 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).es_ES
dc.subjectThermal effectes_ES
dc.subjectPhysical propertieses_ES
dc.subjectUniaxial compressive strengthes_ES
dc.subjectElastic moduluses_ES
dc.subjectGranitees_ES
dc.subjectCultural heritagees_ES
dc.subject.otherIngeniería del Terrenoes_ES
dc.subject.otherPetrología y Geoquímicaes_ES
dc.titleThermal effect of high temperatures on the physical and mechanical properties of a granite used in the UNESCO World Heritage of the north of Portugales_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.peerreviewedsies_ES
dc.identifier.doi10.1016/j.jobe.2021.102823-
dc.relation.publisherversionhttps://doi.org/10.1016/j.jobe.2021.102823es_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses_ES
dc.relation.projectIDinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/TEC2017-85244-C2-1-Pes_ES
dc.relation.projectIDinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-099052-B-I00es_ES
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