Exploitation of poor Greek kaolins: Durability of metakaolin concrete

Badogiannis, E; Tsivilis, S

dc.contributor.author	Badogiannis, E	en
dc.contributor.author	Tsivilis, S	en
dc.date.accessioned	2014-03-01T01:30:29Z
dc.date.available	2014-03-01T01:30:29Z
dc.date.issued	2009	en
dc.identifier.issn	0958-9465	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19597
dc.subject	Concrete	en
dc.subject	Durability	en
dc.subject	Metakaolin	en
dc.subject	Permeability	en
dc.subject	Pore size distribution	en
dc.subject.classification	Construction & Building Technology	en
dc.subject.classification	Materials Science, Composites	en
dc.subject.other	Air permeability	en
dc.subject.other	Capillarity	en
dc.subject.other	Cements	en
dc.subject.other	Chlorine compounds	en
dc.subject.other	Clay minerals	en
dc.subject.other	Durability	en
dc.subject.other	Gas permeability	en
dc.subject.other	Kaolin	en
dc.subject.other	Kaolinite	en
dc.subject.other	Liquids	en
dc.subject.other	Pore size	en
dc.subject.other	Size determination	en
dc.subject.other	Size distribution	en
dc.subject.other	Solids	en
dc.subject.other	Cement contents	en
dc.subject.other	Chloride penetrations	en
dc.subject.other	Chloride permeabilities	en
dc.subject.other	Concrete	en
dc.subject.other	Concrete durabilities	en
dc.subject.other	High purities	en
dc.subject.other	High-performance concretes	en
dc.subject.other	Mean pore sizes	en
dc.subject.other	Metakaolin	en
dc.subject.other	Mixture proportions	en
dc.subject.other	Permeability	en
dc.subject.other	Pore size distribution	en
dc.subject.other	Pore systems	en
dc.subject.other	Porosity and pore sizes	en
dc.subject.other	Sorptivity	en
dc.subject.other	Concretes	en
dc.title	Exploitation of poor Greek kaolins: Durability of metakaolin concrete	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.cemconcomp.2008.11.001	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.cemconcomp.2008.11.001	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	In this paper the effect of metakaolin on concrete durability is investigated. A Greek kaolin of low kaolinite content was thermally treated at defined conditions and the produced metakaolin was finely ground. In addition, a commercial metakaolin of high purity was used. Eight mixture proportions were used to produce high performance concrete, where metakaolin replaced either cement or sand in percentages 10% or 20% by weight of the control cement content. Durability of metakaolin concrete was evaluated by means of resistance to chloride penetration, air permeability, sorptivity, porosity and pore size distribution. Metakaolin concrete exhibits significantly lower chloride permeability, gas permeability and sorptivity. The addition of metakaolin refines the pore system of concrete, leading to a decreased mean pore size and improved uniformity of the pore size distribution. The produced metakaolin, derived from the poor Greek kaolin, imparts similar behavior to that of the commercial metakaolin, with respect to the concrete durability. (C) 2008 Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Cement and Concrete Composites	en
dc.identifier.doi	10.1016/j.cemconcomp.2008.11.001	en
dc.identifier.isi	ISI:000264313800006	en
dc.identifier.volume	31	en
dc.identifier.issue	2	en
dc.identifier.spage	128	en
dc.identifier.epage	133	en