Parameters affecting thaumasite formation in limestone cement mortar

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

dc.contributor.author	Kakali, G	en
dc.contributor.author	Tsivilis, S	en
dc.contributor.author	Skaropoulou, A	en
dc.contributor.author	Sharp, JH	en
dc.contributor.author	Swamy, RN	en
dc.date.accessioned	2014-03-01T02:42:19Z
dc.date.available	2014-03-01T02:42:19Z
dc.date.issued	2003	en
dc.identifier.issn	0958-9465	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/30935
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	Durability	en
dc.subject.other	Limestone	en
dc.subject.other	Magnesium compounds	en
dc.subject.other	Thermogravimetric analysis	en
dc.subject.other	X ray diffraction analysis	en
dc.subject.other	Thaumasite formation	en
dc.subject.other	Mortar	en
dc.title	Parameters affecting thaumasite formation in limestone cement mortar	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1016/S0958-9465(03)00119-7	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0958-9465(03)00119-7	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. This work deals with the factors affecting thaumasite formation in cement mortars and particularly the limestone content, the curing conditions and the type of sand used. Three types of cement were examined: (i) OPC, (ii) Portland limestone cement containing 15% w/w limestone and (iii) Portland limestone cement containing 30% w/w limestone. Mortar specimens were prepared using calcareous and siliceous sand. The specimens were immersed in a 1.8% MgSO4 Solution and cured at: (i) 5 degreesC and (ii) 25 degreesC. The formation of thaumasite was checked and confirmed by XRD and TGA. In addition visual inspection, strength tests and ultrasonic pulse velocity measurements were carried out for several months. It is concluded that mortars containing limestone, either as sand or as a main constituent of the cement, suffer from the thaumasite form of sulfate attack at low temperature. At room temperature, no sulfate attack was observed after a year of exposure. (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)00119-7	en
dc.identifier.isi	ISI:000186564100025	en
dc.identifier.volume	25	en
dc.identifier.issue	8	en
dc.identifier.spage	977	en
dc.identifier.epage	981	en