Mostra i principali dati dell'item

dc.contributor.authorRevilla Cuesta, Víctor 
dc.contributor.authorEvangelista, Luís
dc.contributor.authorBrito, Jorge de
dc.contributor.authorSkaf Revenga, Marta 
dc.contributor.authorOrtega López, Vanesa 
dc.date.accessioned2022-01-31T09:28:02Z
dc.date.available2022-01-31T09:28:02Z
dc.date.issued2022-01
dc.identifier.issn0950-0618
dc.identifier.urihttp://hdl.handle.net/10259/6372
dc.description.abstractThe high strength and durability of high-performance concrete (HPC) may be significantly reduced by shrinkage cracking. The use of reactive magnesium oxide (MgO) can reduce shrinkage of cement-based materials due to its expansive properties. This study intends to analyse the validity of MgO as shrinkage-reducing agent in recycled aggregate HPC. To do so, ten HPC mixes with 0%, 25%, and 100% of both early-age (7-days air curing) and matured (6-month air curing) RA were produced. In half of the mixes, 10% ordinary Portland cement was replaced with MgO. The use of MgO slightly worsened the mechanical behaviour of HPC, especially when combined with large amounts of RA. On the other hand, the expansion of MgO fully offset the autogenous shrinkage of HPC and reduced total shrinkage by around 20–40%. Water storage of RA, and its deferred release over time, produced a more efficient hydration of MgO, which in turn led to a further reduction of autogenous shrinkage. However, the increase of drying shrinkage caused by RA was greater than this decrease of autogenous shrinkage due to MgO, so the higher the RA content of HPC the lower the total shrinkage reduction when adding MgO. Thus, the decrease of total shrinkage caused by MgO was compensated by the shrinkage increase because of RA when adding amounts above 35% early-age RA and 42% matured RA. Therefore, despite the suitability of MgO as shrinkage-reducing agent in recycled aggregate HPC, its effectiveness was reduced with increasing amounts of RA.en
dc.description.sponsorshipSpanish Ministry of Universities, MICINN, AEI and ERDF [grant numbers FPU17/03374; EST19/00263; PID2020-113837RB-I00; 10.13039/501100011033]. The authors also acknowledge the support of the Foundation for Science and Technology, CERIS Research Centre and Instituto Superior Técnico, the Junta de Castilla y León [grant number UIC231], and the University of Burgos [grant number Y135.GI].en
dc.language.isoenges
dc.publisherElsevieres
dc.relation.ispartofConstruction and Building Materials. 2022, V. 314, Part B, 125726en
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectHigh-performance concreteen
dc.subjectRecycled aggregatesen
dc.subjectRecycled aggregate’s maturityen
dc.subjectMagnesium oxideen
dc.subjectAutogenous shrinkageen
dc.subjectDrying shrinkageen
dc.subject.otherIngeniería civiles
dc.subject.otherCivil engineeringen
dc.subject.otherMateriales de construcciónes
dc.subject.otherBuilding materialsen
dc.titleMechanical performance and autogenous and drying shrinkage of MgO-based recycled aggregate high-performance concreteen
dc.typeinfo:eu-repo/semantics/articlees
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses
dc.relation.publisherversionhttps://doi.org/10.1016/j.conbuildmat.2021.125726es
dc.identifier.doi10.1016/j.conbuildmat.2021.125726
dc.relation.projectIDinfo:eu-repo/grantAgreement/MICIU/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FPU17%2F03374es
dc.relation.projectIDinfo:eu-repo/grantAgreement/MIU//EST19%2F00263es
dc.relation.projectIDinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-113837RB-I00/ES/ESTUDIO A ESCALA REAL DE HORMIGONES SOSTENIBLES, HIDRAULICOS Y BITUMINOSOS, DE ALTAS PRESTACIONES, FABRICADOS CON RESIDUOS SIDERURGICOS Y DE CONSTRUCCIONes
dc.relation.projectIDinfo:eu-repo/grantAgreement/UBU//Y135.GIes
dc.journal.titleConstruction and Building Materialsen
dc.volume.number314es
dc.page.initial125726es
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersiones


Files in questo item

Thumbnail

Questo item appare nelle seguenti collezioni

Mostra i principali dati dell'item