Use of mineral admixtures to prevent thaumasite formation in limestone cement mortar

Tsivilis, S; Kakali, G; Skaropoulou, A; Sharp, JH; Swamy, RN

dc.contributor.author	Tsivilis, S	en
dc.contributor.author	Kakali, G	en
dc.contributor.author	Skaropoulou, A	en
dc.contributor.author	Sharp, JH	en
dc.contributor.author	Swamy, RN	en
dc.date.accessioned	2014-03-01T02:42:21Z
dc.date.available	2014-03-01T02:42:21Z
dc.date.issued	2003	en
dc.identifier.issn	0958-9465	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/30968
dc.subject	Mineral admixtures	en
dc.subject	Portland limestone cement	en
dc.subject	Sulfate attack	en
dc.subject	Thaumasite	en
dc.subject.classification	Construction & Building Technology	en
dc.subject.classification	Materials Science, Composites	en
dc.subject.other	Cements	en
dc.subject.other	Curing	en
dc.subject.other	Limestone	en
dc.subject.other	Magnesium compounds	en
dc.subject.other	Thaumasite formation	en
dc.subject.other	Mortar	en
dc.title	Use of mineral admixtures to prevent thaumasite formation in limestone cement mortar	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1016/S0958-9465(03)00153-7	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0958-9465(03)00153-7	en
heal.language	English	en
heal.publicationDate	2003	en
heal.abstract	Concrete made from limestone cement may exhibit a lack of durability due to the formation of thaumasite. The addition of minerals that improve the concrete durability is expected to slow down the formation of thaumasite. In this work the effect of natural pozzolana, fly ash, ground granulated blastfurnace slag (ggbs) and metakaolin on the thaumasite formation in limestone cement mortar is examined. A limestone cement containing 15% w/w limestone was used. Mortar specimens were prepared by replacing a varying part of the limestone cement with the above minerals. Siliceous and calcareous sand was used in order to study the effect of the sand type on the thaumasite formation. The specimens were immersed in a 1.8% MgSO4 solution and cured at 5 and 25 degreesC. The formation of thaumasite was checked and confirmed by visual inspection, strength tests, ultrasonic pulse velocity measurements, XRD and TGA. It is concluded that the use of specific minerals, as partial replacement of cement, inhibits the thaumasite formation in limestone cement mortar. (C) 2003 Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Cement and Concrete Composites	en
dc.identifier.doi	10.1016/S0958-9465(03)00153-7	en
dc.identifier.isi	ISI:000186564100024	en
dc.identifier.volume	25	en
dc.identifier.issue	8	en
dc.identifier.spage	969	en
dc.identifier.epage	976	en