Utilization of jarosite/alunite residue for mortars restoration production

Katsioti, M; Mauridou, O; Moropoulou, A; Aggelakopoulou, E; Tsakiridis, PE; Agatzini-Leonardou, S; Oustadakis, P

dc.contributor.author	Katsioti, M	en
dc.contributor.author	Mauridou, O	en
dc.contributor.author	Moropoulou, A	en
dc.contributor.author	Aggelakopoulou, E	en
dc.contributor.author	Tsakiridis, PE	en
dc.contributor.author	Agatzini-Leonardou, S	en
dc.contributor.author	Oustadakis, P	en
dc.date.accessioned	2014-03-01T01:34:49Z
dc.date.available	2014-03-01T01:34:49Z
dc.date.issued	2010	en
dc.identifier.issn	1359-5997	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20881
dc.subject	Characterization	en
dc.subject	Jarosite/alunite residue	en
dc.subject	Lime	en
dc.subject	Mechanical strength	en
dc.subject	Restoration mortars	en
dc.subject.classification	Construction & Building Technology	en
dc.subject.classification	Engineering, Civil	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	Alkaline environment	en
dc.subject.other	AlOOH	en
dc.subject.other	Aluminum hydroxide	en
dc.subject.other	Compressive and flexural strengths	en
dc.subject.other	Ettringites	en
dc.subject.other	Flexural strength	en
dc.subject.other	Historic masonry	en
dc.subject.other	Hydration products	en
dc.subject.other	Hydraulic lime mortars	en
dc.subject.other	Hydrometallurgical process	en
dc.subject.other	Low grade	en
dc.subject.other	Mechanical behavior	en
dc.subject.other	Mechanical strength	en
dc.subject.other	Mercury porosimetry	en
dc.subject.other	Quartz sand	en
dc.subject.other	Restoration mortars	en
dc.subject.other	Waste products	en
dc.subject.other	Bending strength	en
dc.subject.other	Calcium	en
dc.subject.other	Compressive strength	en
dc.subject.other	Dissolution	en
dc.subject.other	Gypsum	en
dc.subject.other	Hydration	en
dc.subject.other	Lime	en
dc.subject.other	Mechanical engineering	en
dc.subject.other	Mercury (metal)	en
dc.subject.other	Mortar	en
dc.subject.other	Oxide minerals	en
dc.subject.other	Quartz	en
dc.subject.other	Restoration	en
dc.subject.other	Plaster	en
dc.title	Utilization of jarosite/alunite residue for mortars restoration production	en
heal.type	journalArticle	en
heal.identifier.primary	10.1617/s11527-009-9478-y	en
heal.identifier.secondary	http://dx.doi.org/10.1617/s11527-009-9478-y	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	The present study was carried out to produce artificial hydraulic lime mortars for repair and conservation of historic masonry using a jarosite/alunite precipitate, a waste product of a novel Greek hydrometallurgical process developed to treat economically low grade nickel oxides ores. Alternative mortars were prepared by mixing lime powder, quartz sand and the above residue, substituting lime up to 50%. The mortars were prepared and tested according to European Norm EN 1015. They were cured for periods of 28 and 90 days and the compressive and flexural strengths were determined. The best mechanical behavior was observed for the mortar with 50% lime replacement, which also presented a low ratio of compressive to flexural strength (f (c)/f (f)). X-Ray diffraction, TG-DTA and mercury porosimetry were used to characterize the hydration products at 28 and 90 days. The results showed that the jarosite/alunite residue was dissolved in the high alkaline environment of the mortar, producing CaSO4 center dot A 2H(2)O and AlOOH. During hydration, gypsum and some of the Ca(OH)(2) were consumed, together with aluminum hydroxide in order to produce ettringite, a fact that improved the mechanical behavior of the produced mortars.	en
heal.publisher	SPRINGER	en
heal.journalName	Materials and Structures/Materiaux et Constructions	en
dc.identifier.doi	10.1617/s11527-009-9478-y	en
dc.identifier.isi	ISI:000272318000012	en
dc.identifier.volume	43	en
dc.identifier.issue	1-2	en
dc.identifier.spage	167	en
dc.identifier.epage	177	en