Citric acid as anti-hydration additive for magnesia containing refractory castables

dc.creatorSALOMAO, R.
dc.creatorPANDOLFELLI, V. C.
dc.date.accessioned2012-10-19T01:10:47Z
dc.date.accessioned2018-07-04T14:48:52Z
dc.date.available2012-10-19T01:10:47Z
dc.date.available2018-07-04T14:48:52Z
dc.date.created2012-10-19T01:10:47Z
dc.date.issued2011
dc.identifierCERAMICS INTERNATIONAL, v.37, n.6, p.1839-1842, 2011
dc.identifier0272-8842
dc.identifierhttp://producao.usp.br/handle/BDPI/18016
dc.identifier10.1016/j.ceramint.2011.03.050
dc.identifierhttp://dx.doi.org/10.1016/j.ceramint.2011.03.050
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1614812
dc.description.abstractMagnesia hydration is a key concern in refractory castable processing. The volumetric expansion that follows this reaction can result in cracks or even explosion during the first heating-up. Citric acid (CA) and other chelants can significantly reduce MgO hydration rate in aqueous suspensions by forming an insoluble magnesium citrate protective coating on the magnesia particles` surface. In the present work, the performance of CA as an anti-hydration additive in refractory castables was evaluated by hydration tests, mechanical strength and apparent volumetric expansion (AVE) measurements and thermogravimetry. The results attained have shown that CA effectiveness depends strongly on the amount added and by the interaction with other raw materials in the composition, in particular calcium aluminate cement. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
dc.languageeng
dc.publisherELSEVIER SCI LTD
dc.relationCeramics International
dc.rightsCopyright ELSEVIER SCI LTD
dc.rightsrestrictedAccess
dc.subjectRefractory castables
dc.subjectMagnesia
dc.subjectHydration
dc.subjectChelants
dc.subjectCitric acid
dc.titleCitric acid as anti-hydration additive for magnesia containing refractory castables
dc.typeArtículos de revistas


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