Study of clinker dopped with P and S compounds

Kolovos, KG; Tsivilis, S; Kakali, G

dc.contributor.author	Kolovos, KG	en
dc.contributor.author	Tsivilis, S	en
dc.contributor.author	Kakali, G	en
dc.date.accessioned	2014-03-01T01:21:29Z
dc.date.available	2014-03-01T01:21:29Z
dc.date.issued	2004	en
dc.identifier.issn	1388-6150	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16254
dc.subject	Cement	en
dc.subject	Clinker	en
dc.subject	DTA	en
dc.subject	Phosphorous	en
dc.subject	SEM	en
dc.subject	Sulfur	en
dc.subject.classification	Chemistry, Analytical	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.other	Differential thermal analysis	en
dc.subject.other	Doping (additives)	en
dc.subject.other	Energy dispersive spectroscopy	en
dc.subject.other	Oxidation	en
dc.subject.other	Phosphorus compounds	en
dc.subject.other	Raw materials	en
dc.subject.other	Scanning electron microscopy	en
dc.subject.other	Sintering	en
dc.subject.other	Sulfur compounds	en
dc.subject.other	Surface tension	en
dc.subject.other	Aluminophosphate cements	en
dc.subject.other	Anionic species	en
dc.subject.other	Clinker	en
dc.subject.other	Cements	en
dc.title	Study of clinker dopped with P and S compounds	en
heal.type	journalArticle	en
heal.identifier.primary	10.1023/B:JTAN.0000041655.82776.09	en
heal.identifier.secondary	http://dx.doi.org/10.1023/B:JTAN.0000041655.82776.09	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	The sintering and the structure of clinkers, modified by the introduction of different ionic forms of sulfur and phosphorus into the raw mix, were examined. One reference synthetic mixture and 25 modified mixtures were prepared by mixing the reference sample with 0.5, 1.0, 1.5, 2.0 and 2.5% w/w of chemical grade CaSO4, CaS, Ca-3(PO4)(2), CaHPO4 and Ca(H2PO4)(2). Free lime content in all samples was measured. The sintering reactions in samples were recorded by means of differential thermal analysis. The texture of the clinkers was examined using a scanning electron microscope and EDX. It is concluded that, despite of their relatively low doping concentration in the raw mix, P and S affect considerably its reactivity and the texture of the clinker. The various ionic forms of the same element (SO42-, S2- for S, PO43-, HPO42- and H2PO4- for P) exhibit a different and unequivocal effect on the reactivity of the synthetic raw mix and on the texture of the corresponding clinkers. S (in both forms) and P (added as HPO42-) are mainly dissolved in the melt and they have a positive effect on the burnability of the raw mix. P (added as PO43- or H2PO4-) is preferentially accumulated in belite. In this case further stabilization of beta-C2S occurs and the binding of the free lime is hindered.	en
heal.publisher	KLUWER ACADEMIC PUBL	en
heal.journalName	Journal of Thermal Analysis and Calorimetry	en
dc.identifier.doi	10.1023/B:JTAN.0000041655.82776.09	en
dc.identifier.isi	ISI:000223917700003	en
dc.identifier.volume	77	en
dc.identifier.issue	3	en
dc.identifier.spage	759	en
dc.identifier.epage	766	en