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Principal Component Analysis in monument conservation: Three application examples

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dc.contributor.author Moropoulou, A en
dc.contributor.author Polikreti, K en
dc.date.accessioned 2014-03-01T01:31:42Z
dc.date.available 2014-03-01T01:31:42Z
dc.date.issued 2009 en
dc.identifier.issn 1296-2074 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/19894
dc.subject Brick en
dc.subject Historical mortar en
dc.subject Marble patina en
dc.subject Monument restoration en
dc.subject Multivariate statistics en
dc.subject Principal Component Analysis en
dc.subject.classification Archaeology en
dc.subject.classification Art en
dc.subject.classification Geosciences, Multidisciplinary en
dc.subject.classification Spectroscopy en
dc.subject.other ATMOSPHERE en
dc.subject.other INDUSTRIAL en
dc.title Principal Component Analysis in monument conservation: Three application examples en
heal.type journalArticle en
heal.identifier.primary 10.1016/j.culher.2008.03.007 en
heal.identifier.secondary http://dx.doi.org/10.1016/j.culher.2008.03.007 en
heal.language English en
heal.publicationDate 2009 en
heal.abstract Multivariate statistics is a well-known and invaluable tool in archaeological science but its use is limited in monument restoration. The aim of this work is to demonstrate the effectiveness of Principal Component Analysis (PCA) on the characterization, technology and weathering condition investigation of building materials from historical monuments. Towards this aim, three examples are given: The first one is a provenance and technology investigation of the Aghia Sophia (Istanbul, Turkey) bricks, some of which had to be replaced due to weathering, during recent restoration works. It was proved by PCA that the original clay, used for the construction of the bricks, is not similar to the clay of other contemporary constructions in Istanbul but presents high similarity to the raw material of the bricks from a contemporary church in the island of Rhodes (Dodecanese, Greece). Additionally, the technology of the bricks was studied by mercury intrusion porosimetry, strength tests and Scanning Electron Microscopy. The use of PCA gives a very comprehensive way to present the difference in the technology of the dome bricks. The second presents a classification of mortars from medieval (Byzantine) monasteries, based on their microstructural characteristics (porosity, reverse hydraulicity ratio) and strength measurements. The PCA grouping gives an illustrative diagram depicting the correlation between mortar syntheses and resulting characteristics. The third case shows an example of the correlation between environmental pollution data and data from the weathering layers of marble surfaces (patina composition, orientation of the monument surface, etc.). (C) 2008 Elsevier Masson SAS. All rights reserved. en
heal.publisher ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER en
heal.journalName Journal of Cultural Heritage en
dc.identifier.doi 10.1016/j.culher.2008.03.007 en
dc.identifier.isi ISI:000264831900009 en
dc.identifier.volume 10 en
dc.identifier.issue 1 en
dc.identifier.spage 73 en
dc.identifier.epage 81 en


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