Contribution to the Understanding of the Colour Change in Bluish-Grey Limestones

Bibliographic Details
Main Author: Silva, Teresa P.
Publication Date: 2022
Other Authors: de Oliveira, Daniel P. S., Veiga, João P., Lisboa, Vitor, Carvalho, Jorge, Barreiros, M. Alexandra, Coutinho, Mathilda L., Salas-Colera, Eduardo, Vigário, Rogério
Format: Article
Language: eng
Source: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
Download full: http://hdl.handle.net/10362/142077
Summary: PA 18111
id RCAP_d2f9d1af0d0c7bbf2293994b3cffe3ea
oai_identifier_str oai:run.unl.pt:10362/142077
network_acronym_str RCAP
network_name_str Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
repository_id_str https://opendoar.ac.uk/repository/7160
spelling Contribution to the Understanding of the Colour Change in Bluish-Grey Limestonesbleaching/fadingbuilt heritagedark limestoneironornamental stoneXANESConservationArchaeologyMaterials Science (miscellaneous)PA 18111Bluish-grey limestones have been extensively used as ornamental stones for decoration purposes in buildings, as well as in works of art, and accordingly, have been the target of intense exploration. In Portugal, the Jurassic limestone massif known as the Maciço Calcário Estremenho (MCE), has been the source of grey-coloured ornamental stones, namely the Azul Valverde (one of the most well-known bluish-grey limestones) and Atlantic Blue varieties, both of which may undergo colour changes in outdoor environments. In this sense, it is important to understand the sudden colour change from bluish-grey to yellow/beige in the same limestone block in a quarry, or even, what happens to the colour when polished limestone is placed outdoors. This study was undertaken using various techniques, namely XRF (X-ray fluorescence spectrometry), XRD (X-ray diffraction), SEM (scanning electron microscopy), DTA–TG (differential thermal analysis/thermogra-vimetry) and colourimetry. Synchrotron radiation was also used at the European Synchrotron Radiation Facility (ESRF, Grenoble, France) where XANES (X-ray Absorption Near Edge Structure) spectra at Fe K-edge were collected to ascertain the speciation state of Fe in different coloured zones of the limestone, previously checked by EDXRF (energy dispersive X-ray fluorescence). The presence of Fe2+ and Fe3+ are responsible for the greyish and yellow/brown colour, respectively. On the other hand, the UV radiation from the sun causes a quickened and severe bleaching/fading on the dark blue/grey polished limestone.DCR - Departamento de Conservação e RestauroCENIMAT-i3N - Centro de Investigação de Materiais (Lab. Associado I3N)VICARTE - Vidro e Cerâmica para as ArtesRUNSilva, Teresa P.de Oliveira, Daniel P. S.Veiga, João P.Lisboa, VitorCarvalho, JorgeBarreiros, M. AlexandraCoutinho, Mathilda L.Salas-Colera, EduardoVigário, Rogério2022-07-18T22:27:32Z2022-092022-09-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article25application/pdfhttp://hdl.handle.net/10362/142077eng2571-9408PURE: 45445652https://doi.org/10.3390/heritage5030078info:eu-repo/semantics/openAccessreponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiainstacron:RCAAP2024-05-22T18:03:33Zoai:run.unl.pt:10362/142077Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireinfo@rcaap.ptopendoar:https://opendoar.ac.uk/repository/71602025-05-28T17:34:19.255202Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiafalse
dc.title.none.fl_str_mv Contribution to the Understanding of the Colour Change in Bluish-Grey Limestones
title Contribution to the Understanding of the Colour Change in Bluish-Grey Limestones
spellingShingle Contribution to the Understanding of the Colour Change in Bluish-Grey Limestones
Silva, Teresa P.
bleaching/fading
built heritage
dark limestone
iron
ornamental stone
XANES
Conservation
Archaeology
Materials Science (miscellaneous)
title_short Contribution to the Understanding of the Colour Change in Bluish-Grey Limestones
title_full Contribution to the Understanding of the Colour Change in Bluish-Grey Limestones
title_fullStr Contribution to the Understanding of the Colour Change in Bluish-Grey Limestones
title_full_unstemmed Contribution to the Understanding of the Colour Change in Bluish-Grey Limestones
title_sort Contribution to the Understanding of the Colour Change in Bluish-Grey Limestones
author Silva, Teresa P.
author_facet Silva, Teresa P.
de Oliveira, Daniel P. S.
Veiga, João P.
Lisboa, Vitor
Carvalho, Jorge
Barreiros, M. Alexandra
Coutinho, Mathilda L.
Salas-Colera, Eduardo
Vigário, Rogério
author_role author
author2 de Oliveira, Daniel P. S.
Veiga, João P.
Lisboa, Vitor
Carvalho, Jorge
Barreiros, M. Alexandra
Coutinho, Mathilda L.
Salas-Colera, Eduardo
Vigário, Rogério
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv DCR - Departamento de Conservação e Restauro
CENIMAT-i3N - Centro de Investigação de Materiais (Lab. Associado I3N)
VICARTE - Vidro e Cerâmica para as Artes
RUN
dc.contributor.author.fl_str_mv Silva, Teresa P.
de Oliveira, Daniel P. S.
Veiga, João P.
Lisboa, Vitor
Carvalho, Jorge
Barreiros, M. Alexandra
Coutinho, Mathilda L.
Salas-Colera, Eduardo
Vigário, Rogério
dc.subject.por.fl_str_mv bleaching/fading
built heritage
dark limestone
iron
ornamental stone
XANES
Conservation
Archaeology
Materials Science (miscellaneous)
topic bleaching/fading
built heritage
dark limestone
iron
ornamental stone
XANES
Conservation
Archaeology
Materials Science (miscellaneous)
description PA 18111
publishDate 2022
dc.date.none.fl_str_mv 2022-07-18T22:27:32Z
2022-09
2022-09-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10362/142077
url http://hdl.handle.net/10362/142077
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 2571-9408
PURE: 45445652
https://doi.org/10.3390/heritage5030078
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 25
application/pdf
dc.source.none.fl_str_mv reponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron:RCAAP
instname_str FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron_str RCAAP
institution RCAAP
reponame_str Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
collection Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
repository.name.fl_str_mv Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
repository.mail.fl_str_mv info@rcaap.pt
_version_ 1833596800935657472

Similar Items