The effect of metakaolin on the corrosion behavior of cement mortars

Batis, G; Pantazopoulou, P; Tsivilis, S; Badogiannis, E

dc.contributor.author	Batis, G	en
dc.contributor.author	Pantazopoulou, P	en
dc.contributor.author	Tsivilis, S	en
dc.contributor.author	Badogiannis, E	en
dc.date.accessioned	2014-03-01T01:23:10Z
dc.date.available	2014-03-01T01:23:10Z
dc.date.issued	2005	en
dc.identifier.issn	0958-9465	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16854
dc.subject	Compressive strength	en
dc.subject	Corrosion behavior	en
dc.subject	Metakaolin	en
dc.subject	Porosity	en
dc.subject.classification	Construction & Building Technology	en
dc.subject.classification	Materials Science, Composites	en
dc.subject.other	Compressive strength	en
dc.subject.other	Concrete testing	en
dc.subject.other	Corrosion	en
dc.subject.other	Electrochemistry	en
dc.subject.other	Heat treatment	en
dc.subject.other	Microstructure	en
dc.subject.other	Performance	en
dc.subject.other	Porosity	en
dc.subject.other	Corrosion behaviours	en
dc.subject.other	Metakaolin	en
dc.subject.other	Pozzolanic properties	en
dc.subject.other	Saturated calomel electrodes (SCE)	en
dc.subject.other	Mortar	en
dc.title	The effect of metakaolin on the corrosion behavior of cement mortars	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.cemconcomp.2004.02.041	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.cemconcomp.2004.02.041	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	In this paper the effect of metakaolin addition on the corrosion resistance of cement mortar is studied. A poor Greek kaolin with a low kaolinite content was thermally treated and the produced metakaolin (MK) was ground to the appropriate fineness. In addition, a commercial metakaolin (MKC) of high purity was used. Several mixture proportions were used to produce mortar specimens, where metakaolin replaced either sand or cement. Mortar specimens were then exposed to the corrosive environment of either partial or total immersion in 3.5% w/w NaCl solution. For the evaluation of the performance of metakaolin, the following methods were used: compressive strength, corrosion potential, mass loss, electrochemical measurements of the corrosion rate by the Linear Polarization method, carbonation depth and porosity. It is concluded that metakaolin improves the compressive strength and the 10% w/w addition shows the optimum contribution to the strength development. In addition, the use of metakaolin, either as a sand replacement up to 20% w/w, or as a cement replacement up to 10% w/w, improves the corrosion behavior of mortar specimens, while when metakaolin is added in greater percentages there is no positive effect. (C) 2004 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.2004.02.041	en
dc.identifier.isi	ISI:000225152000016	en
dc.identifier.volume	27	en
dc.identifier.issue	1	en
dc.identifier.spage	125	en
dc.identifier.epage	130	en