Thermal treatment of kaolin: The effect of mineralogy on the pozzolanic activity

Kakali, G; Perraki, T; Tsivilis, S; Badogiannis, E

dc.contributor.author	Kakali, G	en
dc.contributor.author	Perraki, T	en
dc.contributor.author	Tsivilis, S	en
dc.contributor.author	Badogiannis, E	en
dc.date.accessioned	2014-03-01T01:17:16Z
dc.date.available	2014-03-01T01:17:16Z
dc.date.issued	2001	en
dc.identifier.issn	0169-1317	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14427
dc.subject	Calcination	en
dc.subject	Kaolin	en
dc.subject	Metakaolinite	en
dc.subject	Mineralogy	en
dc.subject	Pozzolanic activity	en
dc.subject.classification	Mineralogy	en
dc.subject.other	Differential thermal analysis	en
dc.subject.other	Heat treatment	en
dc.subject.other	Infrared spectroscopy	en
dc.subject.other	Mineralogy	en
dc.subject.other	Thermoanalysis	en
dc.subject.other	X ray diffraction analysis	en
dc.subject.other	Pozzolanic activity	en
dc.subject.other	Kaolin	en
dc.subject.other	cement	en
dc.subject.other	kaolin	en
dc.subject.other	mineralogy	en
dc.subject.other	thermal alteration	en
dc.title	Thermal treatment of kaolin: The effect of mineralogy on the pozzolanic activity	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0169-1317(01)00040-0	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0169-1317(01)00040-0	en
heal.language	English	en
heal.publicationDate	2001	en
heal.abstract	This paper reports an investigation on the effect of mineralogy on the pozzolanic activity of fired kaolin. Representative samples of Greek kaolin (Milos Island) and a commercial kaolin of high purity are studied. The samples are tested by X-ray diffraction (XRD), Differential Thermal Analysis (DTA) and Infrared (IR) Spectroscopy in order to determine their mineralogical composition and structural differences. Calcination of samples is carried out at 650 degreesC for 3 h. The decomposition of kaolinite and alunite is recorded using methods of thermal analysis. The resultant products are identified by XRD. The reactivity of the thermally treated samples is evaluated based on Chapelle test. It is concluded that the pozzolanic activity of metakaolinite is strongly related to the crystallinity of the original kaolinite. Well-ordered kaolinite is transformed into less reactive metakaolinite. (C) 2001 Elsevier Science B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Applied Clay Science	en
dc.identifier.doi	10.1016/S0169-1317(01)00040-0	en
dc.identifier.isi	ISI:000171063400007	en
dc.identifier.volume	20	en
dc.identifier.issue	1-2	en
dc.identifier.spage	73	en
dc.identifier.epage	80	en