Use of inorganic setting retarders in cement industry

Papageorgiou, A; Tzouvalas, G; Tsimas, S

dc.contributor.author	Papageorgiou, A	en
dc.contributor.author	Tzouvalas, G	en
dc.contributor.author	Tsimas, S	en
dc.date.accessioned	2014-03-01T01:23:18Z
dc.date.available	2014-03-01T01:23:18Z
dc.date.issued	2005	en
dc.identifier.issn	0958-9465	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16893
dc.subject	Anhydrite	en
dc.subject	FGD gypsum	en
dc.subject	Gypsum	en
dc.subject	Portland cement	en
dc.subject	Setting	en
dc.subject	Strength	en
dc.subject.classification	Construction & Building Technology	en
dc.subject.classification	Materials Science, Composites	en
dc.subject.other	Byproducts	en
dc.subject.other	Calcium compounds	en
dc.subject.other	Costs	en
dc.subject.other	Gypsum	en
dc.subject.other	Impurities	en
dc.subject.other	Regression analysis	en
dc.subject.other	Strength of materials	en
dc.subject.other	Anhydrite	en
dc.subject.other	Calcium sulfate bearing materials (CSBM)	en
dc.subject.other	Clinkers	en
dc.subject.other	Cement industry	en
dc.title	Use of inorganic setting retarders in cement industry	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.cemconcomp.2004.02.005	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.cemconcomp.2004.02.005	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	The majority of cement plants in Greece mainly use natural gypsum to prevent rapid cement setting. The partial or total replacement of gypsum by materials, which contain calcium sulfate. has been instigated by two facts. Firstly, the increasing availability of low-cost by-products containing calcium sulfate and secondly, the prospect that, in the near future, the quarries will mine rock that is a mixture of gypsum and anhydrite. The aim of this paper is to discuss results from laboratory and industrial scale trials where calcium sulfate bearing materials (CSBM) such as natural gypsum, anhydrite and FGD gypsum have been used in various proportions in the cement production. The operational parameters and conditions of the cement mill during the industrial trials and the profile of the calcium sulfate hydrated forms in the produced cement are examined. The addition of FGD gypsum increases setting time without affecting compressive strength profile. The degree of dehydration of the dihydrated calcium sulfate regulates setting and strength performance of the cement partially replaced with either anhydrite or FGD gypsum. (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.2004.02.005	en
dc.identifier.isi	ISI:000226478000005	en
dc.identifier.volume	27	en
dc.identifier.issue	2	en
dc.identifier.spage	183	en
dc.identifier.epage	189	en