The assessment of porosity and pore size distribution of limestone Portland cement pastes

Pipilikaki, P; Beazi-Katsioti, M

dc.contributor.author	Pipilikaki, P	en
dc.contributor.author	Beazi-Katsioti, M	en
dc.date.accessioned	2014-03-01T01:32:02Z
dc.date.available	2014-03-01T01:32:02Z
dc.date.issued	2009	en
dc.identifier.issn	0950-0618	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20035
dc.subject	Limestone cements	en
dc.subject	Pore size distribution	en
dc.subject	Porosity	en
dc.subject.classification	Construction & Building Technology	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	Bone cement	en
dc.subject.other	Cement manufacture	en
dc.subject.other	Cements	en
dc.subject.other	Construction industry	en
dc.subject.other	Gelation	en
dc.subject.other	Limestone	en
dc.subject.other	Magnetic resonance	en
dc.subject.other	Materials	en
dc.subject.other	Materials properties	en
dc.subject.other	Mercury (metal)	en
dc.subject.other	Nuclear magnetic resonance	en
dc.subject.other	Nuclear magnetic resonance spectroscopy	en
dc.subject.other	Oil well cementing	en
dc.subject.other	Plasma waves	en
dc.subject.other	Pore size	en
dc.subject.other	Pore structure	en
dc.subject.other	Porosity	en
dc.subject.other	Portland cement	en
dc.subject.other	Size distribution	en
dc.subject.other	Blended cements	en
dc.subject.other	Capillary pores	en
dc.subject.other	Cement pastes	en
dc.subject.other	Cement productions	en
dc.subject.other	Cryoporometry	en
dc.subject.other	Durable materials	en
dc.subject.other	Gel pores	en
dc.subject.other	Hardened cement pastes	en
dc.subject.other	Hydration rates	en
dc.subject.other	Industry needs	en
dc.subject.other	Limestone cements	en
dc.subject.other	Mercury intrusion porosimetry	en
dc.subject.other	Pore size distribution	en
dc.subject.other	Porosity and pore sizes	en
dc.subject.other	Portland cement pastes	en
dc.subject.other	Cement additives	en
dc.title	The assessment of porosity and pore size distribution of limestone Portland cement pastes	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.conbuildmat.2008.08.028	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.conbuildmat.2008.08.028	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	The cement production industry is one of the most energy and raw materials consuming one. Over the last years a great effort is performed in order to substitute clinker for less energy demanding materials. Nevertheless, construction industry needs durable materials with improved properties. Limestone is being used in blended cements widely. The most important parameter that affects all the properties of cement paste is its pore structure. In this study, four different limestone cements were produced and their pore structure was determined by means of mercury intrusion porosimetry (MIP) and nuclear magnetic resonance (NMR) cryoporometry. The conclusion of the study was that limestone addition affects the pore structure of the cement paste by increasing linearly the size of capillary pores from 20 nm to 40 nm when the maximum amount (35%) of limestone that is allowed by EN 197-1 is used. On the other hand the threshold diameter decreases exponentially and it is evident that limestone hardened cement pastes have many pores of the same size due to the filling effect that minerals additives have. Furthermore, limestone decreases the size of gel pores which is related to higher hydration rates. Hence, the use of limestone in cement produces a material that is structurally adequate to be used in construction. (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.2008.08.028	en
dc.identifier.isi	ISI:000264786100034	en
dc.identifier.volume	23	en
dc.identifier.issue	5	en
dc.identifier.spage	1966	en
dc.identifier.epage	1970	en