Evaluation of blends of high and low calcium fly ashes for use as supplementary cementing materials

Antiohos, S; Maganari, K; Tsimas, S

dc.contributor.author	Antiohos, S	en
dc.contributor.author	Maganari, K	en
dc.contributor.author	Tsimas, S	en
dc.date.accessioned	2014-03-01T01:22:18Z
dc.date.available	2014-03-01T01:22:18Z
dc.date.issued	2005	en
dc.identifier.issn	0958-9465	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16523
dc.subject	Active Silica	en
dc.subject	Amorphous material	en
dc.subject	Hydration	en
dc.subject	k-value	en
dc.subject	Ternary blends	en
dc.subject.classification	Construction & Building Technology	en
dc.subject.classification	Materials Science, Composites	en
dc.subject.other	Cements	en
dc.subject.other	Hydration	en
dc.subject.other	Mixing	en
dc.subject.other	Mixtures	en
dc.subject.other	Polymer blends	en
dc.subject.other	Pozzolan	en
dc.subject.other	Strength of materials	en
dc.subject.other	Substitution reactions	en
dc.subject.other	Active silica	en
dc.subject.other	Binary system	en
dc.subject.other	Cementing materials	en
dc.subject.other	Ternary blends	en
dc.subject.other	Fly ash	en
dc.title	Evaluation of blends of high and low calcium fly ashes for use as supplementary cementing materials	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.cemconcomp.2004.05.001	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.cemconcomp.2004.05.001	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	The present paper outlines the results of a research attempt aimed at developing and evaluating the performance of ternary blended cements, incorporating mixtures of two different types of fly ash (of high and low calcium content). The main target of this study was to investigate whether and by what means, the introduction of a certain type of fly ash into a fly ash-cement (FC) matrix containing a different type of ash, can improve the performance of the initial binary system. For achieving this, new pozzolans were prepared by mixing, in selected proportions, a high lime fly ash with an ash of lower calcium content. The efficiency of the new materials was examined in terms of active silica content, pozzolanic activity potential, strength development, k-values and progress of the pozzolanic action by means of fixed lime capabilities. The results obtained demonstrated that the mixtures containing equal amounts of each fly ash were the most effective for moderate cement substitution, whilst for higher replacements the intermixture possessing the highest active silica content shows supremacy at almost all hydration ages. The superior performance of the ternary fly ash blends was mainly attributed to synergistic effects detected for all the ashes utilized. These were quantified in each case and almost linear correlations were obtained with the k-values of the most efficient ternary mixes. (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.2004.05.001	en
dc.identifier.isi	ISI:000226936100004	en
dc.identifier.volume	27	en
dc.identifier.issue	3	en
dc.identifier.spage	349	en
dc.identifier.epage	356	en