Evaluation of cleaning procedures on the facades of the Bank of Greece historical building in the center of Athens

Moropoulou, A; Tsiourva, Th; Bisbikou, K; Tsantila, V; Biscontin, G; Longega, G; Groggia, M; Dalaklis, E; Petritaki, A

dc.contributor.author	Moropoulou, A	en
dc.contributor.author	Tsiourva, Th	en
dc.contributor.author	Bisbikou, K	en
dc.contributor.author	Tsantila, V	en
dc.contributor.author	Biscontin, G	en
dc.contributor.author	Longega, G	en
dc.contributor.author	Groggia, M	en
dc.contributor.author	Dalaklis, E	en
dc.contributor.author	Petritaki, A	en
dc.date.accessioned	2014-03-01T01:17:50Z
dc.date.available	2014-03-01T01:17:50Z
dc.date.issued	2002	en
dc.identifier.issn	0360-1323	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14684
dc.subject	Archictectural surfaces	en
dc.subject	Cleaning materials	en
dc.subject	Cleaning treatments	en
dc.subject	Evaluation procedures	en
dc.subject	Historic buildings	en
dc.subject	Non-destructive techniques	en
dc.subject	Pollution impact	en
dc.subject.classification	Construction & Building Technology	en
dc.subject.classification	Engineering, Environmental	en
dc.subject.classification	Engineering, Civil	en
dc.subject.other	Abrasion	en
dc.subject.other	Air pollution	en
dc.subject.other	Building materials	en
dc.subject.other	Chelation	en
dc.subject.other	Cleaning	en
dc.subject.other	Deposition	en
dc.subject.other	Image processing	en
dc.subject.other	Marble	en
dc.subject.other	Nondestructive examination	en
dc.subject.other	Pressure effects	en
dc.subject.other	Spraying	en
dc.subject.other	Weathering	en
dc.subject.other	Building cleaning	en
dc.subject.other	Facades	en
dc.subject.other	building	en
dc.subject.other	cleaning	en
dc.subject.other	weathering	en
dc.title	Evaluation of cleaning procedures on the facades of the Bank of Greece historical building in the center of Athens	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0360-1323(01)00058-0	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0360-1323(01)00058-0	en
heal.language	English	en
heal.publicationDate	2002	en
heal.abstract	The facades of the Bank of Greece historic building, mainly consisted of porous stone, gray marble and white pentelic marble, are subjected to an intensive air pollution attack in the center of Athens. A diagnostic study was carried out prior to the cleaning procedures for the weathering evaluation. Weathering appears mainly as black depositions, salt crusts, and oily depositions, due to the heavily polluted urban atmosphere from the nearby traffic, Previous improper cleaning treatment by water spray under high pressure caused detachment of grains and fissuring which were recognized as mechanical abrasion of the surfaces. In this study, a pilot investigation is performed with the intention of evaluating the most appropriate cleaning treatment. Therefore, several cleaning procedures were performed in the laboratory and in situ for the evaluation of methods and products applied on the facades. Both chemical and physical cleaning procedures were applied and they were chosen for their selective action: only water and sepiolite for solvent action, ammonium bicarbonate for exchange action, EDTA for the chemical chelating action and microblasting for physical action were used, In situ non-destructive evaluation was performed by Fiber Optics Microscopy in order to assess the counteractions of each cleaning method to the original surfaces. Digital Image Processing was also used to account for the efficiency of each cleaning method. (C) 2002 Elsevier Science Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Building and Environment	en
dc.identifier.doi	10.1016/S0360-1323(01)00058-0	en
dc.identifier.isi	ISI:000176544000010	en
dc.identifier.volume	37	en
dc.identifier.issue	7	en
dc.identifier.spage	753	en
dc.identifier.epage	760	en