Diatomaceous earth as a cement additive - A case study of deposits from North-eastern Hungary and Milos island, Greece

Fragoulis, D; Stamatakis, M; Papageorgiou, D; Pentelenyi, L; Csirik, G

dc.contributor.author	Fragoulis, D	en
dc.contributor.author	Stamatakis, M	en
dc.contributor.author	Papageorgiou, D	en
dc.contributor.author	Pentelenyi, L	en
dc.contributor.author	Csirik, G	en
dc.date.accessioned	2014-03-01T01:52:03Z
dc.date.available	2014-03-01T01:52:03Z
dc.date.issued	2002	en
dc.identifier.issn	0949-0205	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/26545
dc.subject.classification	Construction & Building Technology	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.title	Diatomaceous earth as a cement additive - A case study of deposits from North-eastern Hungary and Milos island, Greece	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2002	en
heal.abstract	Three diatomaceous rocks of different origin, two from Hungary and one from Greece, were studied and their effect on the cement properties was determined. The Hungarian diatomite samples were extracted from an active diatomite quarry located in the Tokaj Mountains, operated for the production of granules. The Greek diatomite sample was extracted from a pozzolanic tuff quarry, located on the island of Milos. The diatomite rock samples studied contained high amounts of biogenic amorphous silica (opal-A) and minor amounts of feldspars, calcite, montmorillonite and volcanic glass. The Hungarian diatomite rocks were deposited in a fresh water environment, while the Greek diatomite rock was deposited in a shallow marine environment. According to the depositional environment they differ in size and morphology of the diatom relies, the predominant phase of the siliceous rocks. Laboratory tests and measurements showed that the diatomite rock samples examined exhibited good pozzolanic properties and could replace the currently used natural pozzolanas. A higher late compressive strength was obtained by the use of the diatomaceous earth with the highest amorphous silica content. The thread-like shape of the diatom cells that were predominant in this sample could be one of the parameters contributing to the high strength of the cement produced with the addition of this material.	en
heal.publisher	BAUVERLAG GMBH	en
heal.journalName	ZKG INTERNATIONAL	en
dc.identifier.isi	ISI:000173657500007	en
dc.identifier.volume	55	en
dc.identifier.issue	1	en
dc.identifier.spage	80	en
dc.identifier.epage	85	en