Performance of limestone cement mortars in a high sulfates environment

Pipilikaki, P; Katsioti, M; Gallias, JL

dc.contributor.author	Pipilikaki, P	en
dc.contributor.author	Katsioti, M	en
dc.contributor.author	Gallias, JL	en
dc.date.accessioned	2014-03-01T01:31:38Z
dc.date.available	2014-03-01T01:31:38Z
dc.date.issued	2009	en
dc.identifier.issn	0950-0618	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19861
dc.subject	Cement	en
dc.subject	Ettringite	en
dc.subject	Gypsum	en
dc.subject	Limestone	en
dc.subject	Sulfates	en
dc.subject.classification	Construction & Building Technology	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	Cement manufacture	en
dc.subject.other	Compressive strength	en
dc.subject.other	Deterioration	en
dc.subject.other	Gypsum	en
dc.subject.other	Ice	en
dc.subject.other	Limestone	en
dc.subject.other	Microscopic examination	en
dc.subject.other	Mortar	en
dc.subject.other	Optical microscopy	en
dc.subject.other	Plaster	en
dc.subject.other	Pore size	en
dc.subject.other	Portland cement	en
dc.subject.other	Sodium	en
dc.subject.other	Strength of materials	en
dc.subject.other	Analytical techniques	en
dc.subject.other	Cement compositions	en
dc.subject.other	Cement mortars	en
dc.subject.other	Cement pastes	en
dc.subject.other	Change of lengths	en
dc.subject.other	Environmental scanning electron microscopies	en
dc.subject.other	Ettringite	en
dc.subject.other	Laboratory conditions	en
dc.subject.other	Measuring	en
dc.subject.other	On resistances	en
dc.subject.other	Ordinary portland cements	en
dc.subject.other	Pore size distributions	en
dc.subject.other	Sulfates	en
dc.subject.other	X-ray diffractions	en
dc.subject.other	Cements	en
dc.title	Performance of limestone cement mortars in a high sulfates environment	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.conbuildmat.2008.05.001	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.conbuildmat.2008.05.001	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	With the aim of studying the influence of cement composition on resistance in high sulfates environment, standard mortars have been produced using ordinary Portland cement (CEM I - 32.5) and limestone cement with 35% limestone (CEM II/B-LL - 32.5). The pore size distribution of the cement pastes was measured. The mortars were immersed in a 5% Na2SO4 solution at 20 degrees C for 1.5 years and the caused deterioration was been visually observed at a regular basis. Furthermore, the mortars expansion was being estimated by measuring the change of length. At the end of the experiment the compressive strength of the mortars was measured. The deterioration products of the mortars have been identified by means of X-ray diffraction, optical microscopy and environmental scanning electron microscopy. The limestone cement based mortar presented cracking that started at the age of 6 months and continued throughout the experiment. It also displayed high expansion after 250 days of immersion in a 5% Na2SO4 caused, as proved using the analytical techniques, by the formation of gypsum and ettringite. Concluding, the cement with 35% limestone did not perform as well as ordinary Portland cement under the most aggressive laboratory conditions. Hence, it is obvious that the addition of limestone in the cement leads to a totally different behaviour than Portland cement with respect to the resistance in high sulfates environment. (C) 2008 Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Construction and Building Materials	en
dc.identifier.doi	10.1016/j.conbuildmat.2008.05.001	en
dc.identifier.isi	ISI:000261779300053	en
dc.identifier.volume	23	en
dc.identifier.issue	2	en
dc.identifier.spage	1042	en
dc.identifier.epage	1049	en