A novel way to upgrade the coarse part of a high calcium fly ash for reuse into cement systems

Antiohos, SK; Tsimas, S

dc.contributor.author	Antiohos, SK	en
dc.contributor.author	Tsimas, S	en
dc.date.accessioned	2014-03-01T01:25:45Z
dc.date.available	2014-03-01T01:25:45Z
dc.date.issued	2007	en
dc.identifier.issn	0956-053X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17748
dc.subject	Coal-fired Power Plant	en
dc.subject	Fly Ash	en
dc.subject.classification	Engineering, Environmental	en
dc.subject.classification	Environmental Sciences	en
dc.subject.other	Cements	en
dc.subject.other	Coal fired boilers	en
dc.subject.other	Fly ash	en
dc.subject.other	Hydration	en
dc.subject.other	Land fill	en
dc.subject.other	Carbon content	en
dc.subject.other	Pozzolanic behavior	en
dc.subject.other	Reject fly ash (rFA)	en
dc.subject.other	Waste utilization	en
dc.subject.other	calcium	en
dc.subject.other	cement	en
dc.subject.other	Cements	en
dc.subject.other	Coal fired boilers	en
dc.subject.other	Fly ash	en
dc.subject.other	Hydration	en
dc.subject.other	Land fill	en
dc.subject.other	Waste utilization	en
dc.subject.other	cement	en
dc.subject.other	fly ash	en
dc.subject.other	grinding	en
dc.subject.other	industrial waste	en
dc.subject.other	mechanical property	en
dc.subject.other	recycling	en
dc.subject.other	waste management	en
dc.subject.other	article	en
dc.subject.other	building industry	en
dc.subject.other	electric power plant	en
dc.subject.other	environmental protection	en
dc.subject.other	fly ash	en
dc.subject.other	hydration	en
dc.subject.other	landfill	en
dc.subject.other	priority journal	en
dc.subject.other	Calcium	en
dc.subject.other	Carbon	en
dc.subject.other	Coal	en
dc.subject.other	Conservation of Natural Resources	en
dc.subject.other	Construction Materials	en
dc.subject.other	Particle Size	en
dc.subject.other	Particulate Matter	en
dc.subject.other	Refuse Disposal	en
dc.title	A novel way to upgrade the coarse part of a high calcium fly ash for reuse into cement systems	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.wasman.2006.03.016	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.wasman.2006.03.016	en
heal.language	English	en
heal.publicationDate	2007	en
heal.abstract	Reject fly ash (rFA) represents a significant portion of the fly ashes produced from coal-fired power plants. Due to the high carbon content and large particle mean diameter, rFA is not utilized in the construction sector (for example, as supplementary cementing material) and is currently dumped into landfills, thus representing an additional environmental burden. Recently, the feasibility of using rFA in a relatively small number of applications, like solidification/stabilization of other wastes, has been investigated by different researchers. However, as the overall amount of fly ash utilized in such applications is still limited, there is a need to investigate other possibilities for rFA utilization starting from a deeper understanding of its properties. In the work presented herein, mechanical and hydration properties of cementitious materials prepared by blending the coarse fraction of a lignite high-calcium fly ash with ordinary cement were monitored and compared with the respective ones of a good quality fly ash-cement mixture. The results of this work reveal that a relatively cheap, bilateral classification-grinding method is able to promote the pozzolanic behavior of the rFAs, so that the overall performances of rFA containing cements are drastically improved. The evaluation of these results supports the belief that appropriate utilization of non-standardized materials may lead to new environmental-friendly products of superior quality. (c) 2006 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Waste Management	en
dc.identifier.doi	10.1016/j.wasman.2006.03.016	en
dc.identifier.isi	ISI:000245302300010	en
dc.identifier.volume	27	en
dc.identifier.issue	5	en
dc.identifier.spage	675	en
dc.identifier.epage	683	en