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dc.contributor.authorDanner, Tobias
dc.contributor.authorSletnes, Malin
dc.contributor.authorJustnes, Harald
dc.date.accessioned2021-01-25T09:50:28Z
dc.date.available2021-01-25T09:50:28Z
dc.date.issued2020
dc.identifier.issn0800-6377
dc.identifier.urihttps://hdl.handle.net/11250/2724477
dc.description.abstractBauxite residue is a major waste stream available in large volumes globally that can cause risks to the surrounding environment (e.g. ecotoxicity) when disposed and stored by conventional methods. There is yet no large-scale application and the utilization as supplementary cementitious material might be the best way to re-use bauxite residue. The main obstacle for the utilization of bauxite residue in the construction industry is the high alkalinity. This paper presents first results of a study on alkali reduction of bauxite residue by acetic acid treatment and the potential application of this alkali reduced bauxite residue as pozzolan in cementitious binders. A process of alkali reduction is presented that can help solving waste management problems of alumina refineries by transforming bauxite residue to a less hazardous waste, while producing a reactive pozzolan and Na-acetate that can find application in the construction and infrastructure market. 90% alkalinity reduction of bauxite residue could be achieved by simply washing with diluted acetic acid. Alkali-reduced bauxite residue showed good pozzolanic reactivity regarding portlandite consumption, bound water and 28-day compressive strength of mortars with 20% replacement of OPC.en_US
dc.language.isoengen_US
dc.publisherSciendoen_US
dc.rightsCC BY 3.0*
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/3.0/*
dc.subjectBauxite residueen_US
dc.subjectRed muden_US
dc.subjectPozzolan Cementen_US
dc.subjectAcetic aciden_US
dc.subjectAlkali reductionen_US
dc.subjectSodium acetateen_US
dc.titleAlkali-reduced Bauxite Residue as Novel SCMen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.rights.holder© 2020 The authorsen_US
dc.subject.nsiVDP::Teknologi: 500en_US
dc.source.volume63en_US
dc.source.journalNordic Concrete Researchen_US
dc.source.issue2en_US
dc.identifier.doi10.2478/ncr-2020-0015
dc.identifier.cristin1846664
dc.relation.projectNorges forskningsråd: 269767en_US


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Except where otherwise noted, this item's license is described as CC BY 3.0