The effect of foreign ions on the reactivity of the CaO-SiO2-Al2O3-Fe2O3 system: Part II: Cations

Kolovos, K; Tsivilis, S; Kakali, G

dc.contributor.author	Kolovos, K	en
dc.contributor.author	Tsivilis, S	en
dc.contributor.author	Kakali, G	en
dc.date.accessioned	2014-03-01T01:18:25Z
dc.date.available	2014-03-01T01:18:25Z
dc.date.issued	2002	en
dc.identifier.issn	0008-8846	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14989
dc.subject	CaO-SiO2-Al2O3-Fe2O3	en
dc.subject	Cations	en
dc.subject	FreeCaO	en
dc.subject	Mineralizers	en
dc.subject	Volatility	en
dc.subject.classification	Construction & Building Technology	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	Calcium compounds	en
dc.subject.other	Electronic structure	en
dc.subject.other	Mixtures	en
dc.subject.other	Positive ions	en
dc.subject.other	Reaction kinetics	en
dc.subject.other	Free lime content	en
dc.subject.other	Cements	en
dc.title	The effect of foreign ions on the reactivity of the CaO-SiO2-Al2O3-Fe2O3 system: Part II: Cations	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0008-8846(01)00705-0	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0008-8846(01)00705-0	en
heal.language	English	en
heal.publicationDate	2002	en
heal.abstract	The subject of this paper is the effect of foreign cations on the reactivity of the CaO-SiO2-Al2O3-Fe2O3 system. One reference mixture and eighteen modified mixtures, prepared by mixing the reference sample with 1% w/w of chemical grade MnO2, CuO, V2O5, PbO, CdO, ZrO2, Li2O, MoO3, Co2O3, NiO, WO3, ZnO, Nb2O5, CrO3, Ta2O5, TiO2, BaO2 and H3BO3 were studied. The effect on the reactivity is evaluated on the basis of the free lime content in samples sintered at 1200 and 1450 degreesC. At 1200 degreesC, the reactivity of the mixture is greatly increased in the presence of Cu and Li oxides. Based on their effect at 1450 degreesC, the added elements can be divided into three groups. W, Ta, Cu, Ti and Mo show the most positive effect, decreasing the free CaO (fCaO) content by 30-60%, compared with the pure sample. Cr and B cause an increase of fCaO content, while the rest of the elements exhibit a marginal positive effect. According to their volatility at 1450 degreesC, the added compounds can be subdivided into three groups of low (Ti4-, Cu2+, Mo6+, W+6, V5+, Zn2+, Zr4+), moderate (Cr6+, Co3+, Ni2+, Mn4+) and high volatility (Cd2+, Pb2+). All burned samples, analyzed by means of X-ray diffraction, have a final mineralogical composition, which corresponds to the structure of a typical clinker. (C) 2002 Elsevier Science Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Cement and Concrete Research	en
dc.identifier.doi	10.1016/S0008-8846(01)00705-0	en
dc.identifier.isi	ISI:000175783100021	en
dc.identifier.volume	32	en
dc.identifier.issue	3	en
dc.identifier.spage	463	en
dc.identifier.epage	469	en