Metakaolin as supplementary cementitious material : Optimization of kaolin to metakaolin conversion

Badogiannis, E; Kakali, G; Tsivilis, S

dc.contributor.author	Badogiannis, E	en
dc.contributor.author	Kakali, G	en
dc.contributor.author	Tsivilis, S	en
dc.date.accessioned	2014-03-01T01:22:44Z
dc.date.available	2014-03-01T01:22:44Z
dc.date.issued	2005	en
dc.identifier.issn	1388-6150	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16639
dc.subject	Cementitious materials	en
dc.subject	Heat treatment	en
dc.subject	Kaolin	en
dc.subject	Metakaolin	en
dc.subject	Minerals	en
dc.subject	Pozzolanic activity	en
dc.subject.classification	Chemistry, Analytical	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.other	Cements	en
dc.subject.other	Differential thermal analysis	en
dc.subject.other	Heat treatment	en
dc.subject.other	Optimization	en
dc.subject.other	Pozzolan	en
dc.subject.other	Reaction kinetics	en
dc.subject.other	X ray diffraction	en
dc.subject.other	Cementitious materials	en
dc.subject.other	Metakaolin	en
dc.subject.other	Pozzolanic activity	en
dc.subject.other	Reactive metakaolin	en
dc.subject.other	Kaolin	en
dc.title	Metakaolin as supplementary cementitious material : Optimization of kaolin to metakaolin conversion	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s10973-005-0806-3	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s10973-005-0806-3	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	In this paper the optimization of the kaolin calcination is studied, aiming at using the produced metakaolin as supplementary cementitious material. Representative samples of poor Greek kaolin (Milos island) and a high purity commercial kaolin were tested. Samples were heated at different temperatures during different times. The optimization of calcination conditions was studied by DTA-TG and XRD analysis of the raw and thermal treated kaolin samples, by pozzolanic activity analysis of metakaolins and finally by strength development analysis of cement-metakaolin mixtures. This approach showed that heating at 650°C for 3 h is efficient to convert poor kaolins with low alunite content to highly reactive metakaolins. However in the case of kaolin with a high alunite content, thermal treatment at 850°C for 3 h is required in order to remove undesirable SO3. Evidence was found that poor kaolins can be efficiently used for the production of highly reactive metakaolins. © 2005 Akadémiai Kiadó, Budapest.	en
heal.publisher	SPRINGER	en
heal.journalName	Journal of Thermal Analysis and Calorimetry	en
dc.identifier.doi	10.1007/s10973-005-0806-3	en
dc.identifier.isi	ISI:000231218300033	en
dc.identifier.volume	81	en
dc.identifier.issue	2	en
dc.identifier.spage	457	en
dc.identifier.epage	462	en