The effect of the particle size differentiation of lignite fly ash on cement industry applications

Itskos, GS; Itskos, S; Koukouzas, N

dc.contributor.author	Itskos, GS	en
dc.contributor.author	Itskos, S	en
dc.contributor.author	Koukouzas, N	en
dc.date.accessioned	2014-03-01T02:52:12Z
dc.date.available	2014-03-01T02:52:12Z
dc.date.issued	2009	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/35864
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-74849104629&partnerID=40&md5=7ba0702cb14c65362f7196af6a22ffd9	en
dc.subject	Calcareous fly ash	en
dc.subject	Cement additives	en
dc.subject	Lignite	en
dc.subject	Particle size distribution	en
dc.subject	Sustainable utilization	en
dc.subject.other	Calcareous fly ash	en
dc.subject.other	Cement manufacturing	en
dc.subject.other	Coarse-grained	en
dc.subject.other	Finegrained fractions	en
dc.subject.other	Fly ash cements	en
dc.subject.other	Grain fraction	en
dc.subject.other	Hydraulic properties	en
dc.subject.other	Lignite fly ash	en
dc.subject.other	Lignite mining	en
dc.subject.other	Mineralogical compositions	en
dc.subject.other	Mineralogical properties	en
dc.subject.other	Power production	en
dc.subject.other	Pozzolanic additives	en
dc.subject.other	Production process	en
dc.subject.other	Sustainable exploitation	en
dc.subject.other	Sustainable utilization	en
dc.subject.other	Cement additives	en
dc.subject.other	Cement manufacture	en
dc.subject.other	Fly ash	en
dc.subject.other	Lignite	en
dc.subject.other	Size distribution	en
dc.subject.other	Coal ash	en
dc.title	The effect of the particle size differentiation of lignite fly ash on cement industry applications	en
heal.type	conferenceItem	en
heal.publicationDate	2009	en
heal.abstract	The chemical and mineralogical composition of lignite fly ash (FA) varies as a function of the prevalent conditions in both the processes of power production and lignite mining. The differentiation of the qualitative and quantitative composition of the Greek calcareous lignite fly ash, as a function of its particle size distribution, is verified in this paper. According to the results of the conducted research, a fine-grained fraction of considerable amount presents properties that obstruct the sustainable exploitation of lignite fly ash in cement industry applications. On the other hand, the same grain fraction (because of its hydraulic properties) can be utilized in other sort of applications, based on different criteria. The coarse-grained fraction (which reflects a low proportion to the total fly ash output) presents the same undesired characteristics as well. However, the intermediate grain fraction [75-150μm] presents the highly desired properties in the field of the utilization of fly ash as pozzolanic additive in the production process of cement. In addition, the mechanism of the formation of the intermediate grain fraction strongly prevents the factors that cause the variation of its quality. It is therefore the optimum part of the whole amount of lignite fly ash, to be utilized as additive in cement manufacturing. The outcomes of this paper will hopefully contribute to the crucial goal of the expansion of the utilization of lignite fly ash in Greek cement industry by proposing a more effective way of using this material, basically by taking advantage of its fundamental chemical and mineralogical properties.	en
heal.journalName	3rd World of Coal Ash, WOCA Conference - Proceedings	en