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Evaluation of nanolime dispersions for the protection of archaeological clay-based building materials

Michalopoulou Anastasia, Maravelaki Pagona, Stefanis Nikolaos-Alexios, Theoulakis Panagiotis, Andreou Stelios, Kilikoglou, Vassilis, Karatasios, Ioannis

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URIhttp://purl.tuc.gr/dl/dias/AA3F3FD7-234C-48EF-AC05-7CB9EC8B444B-
Identifierhttps://doi.org/10.5281/zenodo.3960201-
Identifierhttps://zenodo.org/record/3960201#.YUmV732_yUk-
Languageen-
Extent22 pagesen
TitleEvaluation of nanolime dispersions for the protection of archaeological clay-based building materialsen
CreatorMichalopoulou Anastasiaen
CreatorΜιχαλοπουλου Αναστασιαel
CreatorMaravelaki Pagonaen
CreatorΜαραβελακη Παγωναel
CreatorStefanis Nikolaos-Alexiosen
CreatorTheoulakis Panagiotisen
CreatorAndreou Steliosen
CreatorKilikoglou, Vassilisen
CreatorKaratasios, Ioannisen
PublisherHenan University, Kaifengen
Content SummaryClay-based building materials have been very popular in construction and common in cultural heritage sites around the Mediterranean. The excavation of the Late Bronze Age settlement of Thessaloniki Toumba (northern Greece), revealed an abundance of this type of material with apparent preservation problems mainly caused by swelling phenomena due to water absorption and/or humidity fluctuations. This led to the alteration of the structural and aesthetic integrity of the archaeological findings, jeopardizing the preservation of the site and as a consequence, the archaeological evidence that they contain. Triggered by the identification of swelling clay phases in the sixteen samples of mud-bricks, this work studies the effectiveness, in terms of anti-swelling action, of two different categories of calcium hydroxide materials: saturated solution of calcium hydroxide (limewater) and various types of laboratory produced nano-lime dispersions. The effect of the dispersion medium (water and mixed polar solvents) on the reactivity of calcium hydroxide with clays and the stabilization of their microstructure were investigated on laboratory produced clay briquettes containing different percentages of montmorillonite (1, 5 and 15 % w/w). The interpretation of mineralogical (XRD) and chemical results (FTIR) highlighted the significance of the dispersion medium for the treatments and the beneficial role of laboratory prepared nano-lime dispersions when they are used as swelling inhibitors. Nanolimes were able to react and stabilize the external layers of clays through the formation of C-S-H, thus resulting in increased durability of mud- briquettes against swelling.en
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2021-09-21-
Date of Publication2020-
SubjectBronze Age Tumbaen
SubjectNanolimeen
SubjectMud bricksen
SubjectAdobe structuresen
SubjectSwelling claysen
SubjectMontmorilloniteen
SubjectConsolidationen
SubjectEarthen Architectureen
SubjectConservationen
Bibliographic CitationA. Michalopoulou, N.-P. Maravelaki, N.-A. Stefanis, P. Theoulakis, S. Andreou, V. Kilikoglou and I. Karatasios, “Evaluation of nanolime dispersions for the protection of archaeological clay-based building materials,” Mediterr. Archaeol. Archaeom., vol. 20, no 3, pp. 221-242, Dec. 2020. doi: 10.5281/zenodo.3960201 en

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