Properties and hydration of blended cements with calcareous diatomite

Kastis, D; Kakali, G; Tsivilis, S; Stamatakis, MG

dc.contributor.author	Kastis, D	en
dc.contributor.author	Kakali, G	en
dc.contributor.author	Tsivilis, S	en
dc.contributor.author	Stamatakis, MG	en
dc.date.accessioned	2014-03-01T01:24:54Z
dc.date.available	2014-03-01T01:24:54Z
dc.date.issued	2006	en
dc.identifier.issn	0008-8846	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17499
dc.subject	Blended cements (D)	en
dc.subject	Diatomite	en
dc.subject	Hydration (A)	en
dc.subject	Mechanical properties (C)	en
dc.subject	Physical properties (C)	en
dc.subject.classification	Construction & Building Technology	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	Blended cements	en
dc.subject.other	Diatomite	en
dc.subject.other	Hydrated products	en
dc.subject.other	Amorphous materials	en
dc.subject.other	Hydration	en
dc.subject.other	Mortar	en
dc.subject.other	Scanning electron microscopy	en
dc.subject.other	Silica	en
dc.subject.other	X ray diffraction	en
dc.subject.other	Cements	en
dc.title	Properties and hydration of blended cements with calcareous diatomite	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.cemconres.2006.05.005	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.cemconres.2006.05.005	en
heal.language	English	en
heal.publicationDate	2006	en
heal.abstract	In this paper the effect of diatomite addition on blended cement properties and hydration was studied. Calcareous diatomaceous rocks of Zakynthos Island, Ionian Sea, containing mainly CaCO3 and amorphous silica of biogenic origin with the form of opal-A were used. Cement mortars and pastes, with 0%, 10%, 20% and 35% replacement of cement with the specific diatomite, were examined. Strength development, water demand and setting time were determined in all samples. In addition, XRD, SEM and weight loss at 350 degrees C were applied in order to study the hydration products and the hydration rate in the cement-diatomite pastes. Blended cements, having up to 10% diatomite content, develop the same compressive strength, as the corresponding Portland cement, while the presence of diatomite leads to an increase of the paste water demand. Diatomite is characterized as natural pozzolana, as it satisfies the requirements of EN 197 1 concerning the active silica content. The pozzolanic nature of the diatomite results to the formation of higher amounts of hydrated products, specifically at the age of 28 days. (C) 2006 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.2006.05.005	en
dc.identifier.isi	ISI:000241712200005	en
dc.identifier.volume	36	en
dc.identifier.issue	10	en
dc.identifier.spage	1821	en
dc.identifier.epage	1826	en