Alternative calcium-sulfate-bearing materials as cement retarders: Part II. FGD gypsum

Tzouvalas, G; Rantis, G; Tsimas, S

dc.contributor.author	Tzouvalas, G	en
dc.contributor.author	Rantis, G	en
dc.contributor.author	Tsimas, S	en
dc.date.accessioned	2014-03-01T01:19:53Z
dc.date.available	2014-03-01T01:19:53Z
dc.date.issued	2004	en
dc.identifier.issn	0008-8846	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15745
dc.subject	Compressive strength	en
dc.subject	FGD gypsum	en
dc.subject	Gypsum	en
dc.subject	Portland cement	en
dc.subject	Setting	en
dc.subject.classification	Construction & Building Technology	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	Calcium compounds	en
dc.subject.other	Compressive strength	en
dc.subject.other	Desulfurization	en
dc.subject.other	Flue gases	en
dc.subject.other	Gypsum	en
dc.subject.other	Hydration	en
dc.subject.other	Parameter estimation	en
dc.subject.other	Pozzolan	en
dc.subject.other	Slurries	en
dc.subject.other	Cement retarders	en
dc.subject.other	Clinker	en
dc.subject.other	Dual alkali process (DAP)	en
dc.subject.other	FGD gypsum	en
dc.subject.other	Portland cement	en
dc.title	Alternative calcium-sulfate-bearing materials as cement retarders: Part II. FGD gypsum	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.cemconres.2004.03.021	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.cemconres.2004.03.021	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	The aim of this paper is to investigate the possible displacement of natural gypsum (CaSO(4)(.)2H(2)O) in cement with an alternative setting retarder, such as the industrial by-product derived from flue gas desulfurization process called FGD gypsum. These calcium-sulfate-bearing materials (CSBM), alone or in mixtures, were ground with clinker both in laboratory and industrial scale to examine their influence on the physical and mechanical properties of cement, as well as on the industrial production line of cement. From the present work, it is extracted that the use of mixtures of sulfate-bearing materials with gypsum seems to be advantageous for the actual control of setting time. The addition of FGD gypsum increases setting time without affecting compressive strength profile. During the industrial trial, the formation of hemihydrate form of calcium sulfate dihydrate has a profound regulatory effect on the setting and strength performance of the cement partially replaced with FGD gypsum. (C) 2004 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Cement and Concrete Research	en
dc.identifier.doi	10.1016/j.cemconres.2004.03.021	en
dc.identifier.isi	ISI:000224474200021	en
dc.identifier.volume	34	en
dc.identifier.issue	11	en
dc.identifier.spage	2119	en
dc.identifier.epage	2125	en