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Rheological behaviour of concrete made with fine recycled concrete aggregates - Influence of the superplasticizer

2015-08-01Journal article Restricted access
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dc.contributor.authorCartuxo, F.
dc.contributor.authorDe Brito, Jorge
dc.contributor.authorEvangelista, Luis
dc.contributor.authorJimenez, Jose Ramon
dc.contributor.authorLedesma, E. F.
dc.date.accessioned2016-02-23T16:49:45Z
dc.date.available2016-02-23T16:49:45Z
dc.date.issued2015-08-01
dc.description.abstractThis paper evaluates the influence of two superplasticizers (SP) on the rheological behaviour of concrete made with fine recycled concrete aggregates (FRCA). Three families of concrete were tested: family CO made without SP, family Cl made with a regular superplasticizer and family C2 made with a high-performance superplasticizer. Five replacement ratios of natural sand by FRCA were tested: 0%, 10%, 30%, 50% and 100%. The coarse aggregates were natural gravels. Three criteria were established to design the concrete mixes' composition: keep the same particle size distribution curves, adjust the water/cement ratio to obtain a similar slump and no pre-saturation of the FRCA. All mixes had the same cement and SP content. The results show that the incorporation of FRCA significantly increased the shrinkage and creep deformation. The FRCA's effect was influenced by the curing age. The reference concrete made with natural sand stabilizes the creep deformation faster than the mixes made with FRCA. The incorporation of superplasticizer increased the shrinkage at early ages and decreased the shrinkage at 91 days of age. The regular superplasticizer did not improve the creep deformation while the high-performance superplasticizer highly improved this property. The incorporation of FRCA jeopardized the SP's effectiveness. This study demonstrated that to use FRCA and superplasticizer for concrete production it is necessary to take into account the different rheological behaviour of these mixes. (C) 2015 Elsevier Ltd. All rights reserved.pt_PT
dc.identifier.citationCARTUXO, F.; [et al.] - Rheological behaviour of concrete made with fine recycled concrete aggregates - Influence of the superplasticizer. Construction and Building Materials. ISSN. 0950-0618. Vol. 89 (2015), pp. 36-47pt_PT
dc.identifier.doi10.1016/j.conbuildmat.2015.03.119pt_PT
dc.identifier.issn0950-0618
dc.identifier.issn1879-0526
dc.identifier.urihttp://hdl.handle.net/10400.21/5720
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevier Science LTDpt_PT
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S0950061815004286pt_PT
dc.subjectFine recycled aggregatept_PT
dc.subjectRecycled aggregate concretept_PT
dc.subjectSuperplasticizerspt_PT
dc.subjectRheological behaviourpt_PT
dc.subjectShrinkagept_PT
dc.subjectCreeppt_PT
dc.titleRheological behaviour of concrete made with fine recycled concrete aggregates - Influence of the superplasticizerpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage47pt_PT
oaire.citation.startPage39pt_PT
oaire.citation.volume89pt_PT
person.familyNameCaliço Lopes de Brito
person.familyNameFaria Rocha Evangelista
person.givenNameJorge Manuel
person.givenNameLuís Manuel
person.identifierA-4299-2008
person.identifierB-9864-2011
person.identifier.ciencia-id921D-3921-8308
person.identifier.ciencia-idA612-1A5B-D93D
person.identifier.orcid0000-0001-6766-2736
person.identifier.orcid0000-0001-8406-6864
person.identifier.scopus-author-id7003285554
person.identifier.scopus-author-id57201241744
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationebc80e57-531a-4fe5-ac87-4d8382b7de2e
relation.isAuthorOfPublication8463f3f2-8bac-44bf-82af-6d46db906c73
relation.isAuthorOfPublication.latestForDiscovery8463f3f2-8bac-44bf-82af-6d46db906c73

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