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Use of bottom ash additions in the production of concrete with recycled aggregates

2021-03Journal article Restricted access
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dc.contributor.authorRaposeiro Da Silva, Pedro
dc.contributor.authorSilva, Rui V.
dc.contributor.authorBrito, Jorge de
dc.date.accessioned2022-02-25T15:25:08Z
dc.date.available2022-02-25T15:25:08Z
dc.date.issued2021-03
dc.description.abstractThis paper provides a literature review on the use of bottom ashes in the production of concrete with recycled aggregates. Three types of bottom ash were studied, namely: biomass bottom ashes, coal bottom ashes and sewage sludge bottom ash. The characterization of these ashes focused on the analysis of their physical, chemical, and mineralogical properties. The effect of these ashes was subsequently studied on the fresh, mechanical, and durability-related performances of concrete. Bottom ashes generally present lower pozzolanicity than that typically observed, for example, in coal fly ashes. Their use as partial cement replacement normally leads to some loss in performance of the resulting cementitious composites. Also, using them as aggregates or in combination with recycled aggregates of other sources similarly causes an overall loss in performance. Nevertheless, such decline is still acceptable and often within manageable limits for the production of concrete under specific conditions including some structural applications. The use of these by-products including recycled aggregates may assist in solving a two-fold problem. Firstly, it reduces the consumption of cement and, consequently, the extraction of natural resources, also including the decrease of the consumption of natural aggregates to produce concrete. Furthermore, it solves the problem of the final destination for the significant quantities of bottom ashes produced by different industrial processes. In general, it is possible to conclude that, in moderate contents and when adequately processed, bottom ashes can be considered as viable substitutes of cement with manageable losses in terms of mechanical and durability-related performances. The use of coal bottom ashes was also found to significantly reduce the drying shrinkage strain of concrete.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationSILVA, P. R. da; SILVA, R. V.; BRITO, J. – Use of bottom ash additions in the production of concrete with recycled aggregates. Indian Concrete Journal. ISSN 0019-4565. Vol. 95, N. º 3 (2021), pp. 38-49.pt_PT
dc.identifier.issn0019-4565
dc.identifier.urihttp://hdl.handle.net/10400.21/14340
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherAssociated Cement Companies Ltd.pt_PT
dc.relation.publisherversionhttps://www.icjonline.com/editionabstract_detail/032021
dc.subjectBiomasspt_PT
dc.subjectBottom ashpt_PT
dc.subjectCoalpt_PT
dc.subjectConcretept_PT
dc.subjectRecycled aggregatespt_PT
dc.subjectSewage sludgept_PT
dc.titleUse of bottom ash additions in the production of concrete with recycled aggregatespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage49pt_PT
oaire.citation.issue3pt_PT
oaire.citation.startPage38pt_PT
oaire.citation.titleIndian Concrete Journalpt_PT
oaire.citation.volume95pt_PT
person.familyNameSoares Raposeiro da Silva
person.familyNameCaliço Lopes de Brito
person.givenNamePedro Miguel
person.givenNameJorge Manuel
person.identifierA-4299-2008
person.identifier.ciencia-idFC17-45FB-A606
person.identifier.ciencia-id921D-3921-8308
person.identifier.orcid0000-0001-8770-8439
person.identifier.orcid0000-0001-6766-2736
person.identifier.ridA-1832-2012
person.identifier.scopus-author-id56585411500
person.identifier.scopus-author-id7003285554
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication94ce96d2-f413-4edc-90e7-3bf4f5ea6ab6
relation.isAuthorOfPublicationebc80e57-531a-4fe5-ac87-4d8382b7de2e
relation.isAuthorOfPublication.latestForDiscovery94ce96d2-f413-4edc-90e7-3bf4f5ea6ab6

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