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Impact of coarse recycled concrete aggregate on punching shear performance of flat slabs with and without shear reinforcement

2026-07-03Artigo científico Acesso aberto
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dc.contributor.authorKormošová, Ľudmila
dc.contributor.authorFecko, Tadeáš
dc.contributor.authorHalvonik, Jaroslav
dc.contributor.authorRamos, António Pinho
dc.contributor.institutionCERIS - Polo NOVA
dc.contributor.pblElsevier BV
dc.date.accessioned2026-09-10T14:27:01Z
dc.date.available2026-09-10T14:27:01Z
dc.date.issued2026-07-03
dc.descriptionThis research was supported by the European Union’s NextGenerationEU fund through the Recovery and Resilience Plan for Slovakia (Project No. 09I03-03-V05-00005). Further support was provided by the Slovak Research and Development Agency (Contract No. APVV-23- 0193) and the Scientific Grant Agency of the Ministry of Education, Research, Development and Youth of the Slovak Republic and the Slovak Academy of Sciences (VEGA 1/0185/25). The authors also gratefully acknowledge the ERIES project (HORIZON-INFRA-2021-SERV-01-07) for its technical assistance and insights regarding the seismic and cyclic behavior of recycled aggregate reinforced concrete flat slabs. Publisher Copyright: © 2026 The Authors.
dc.description.abstractThis paper presents results from the second stage of an extensive experimental programme investigating the punching shear behaviour of flat slabs made with coarse recycled concrete aggregate (CRCA). In this stage, five full-scale slabs (250 mm thick) supported by a square column were tested to failure. Three slabs were tested without shear reinforcement, including a reference slab with natural aggregate and two slabs with 50% and 100% replacement of coarse natural aggregate (CNA) by CRCA. Two additional slabs, both with 100% CRCA, were provided with high levels of shear reinforcement using studs and stirrups. All slabs had an identical flexural reinforcement ratio of 1.53% and failed by punching. The results of the third series (S3) in the second stage, complemented by data from two earlier series (S1 & S2) from the first stage, indicate that the use of CRCA does not adversely affect punching shear capacity. The average ratio of normalised punching strengths reached 1.048 for 50% replacement and 1.039 for 100% replacement relative to the reference slabs. For slabs with shear reinforcement and 100% CRCA, the increase in punching capacity relative to slabs without shear reinforcement was 1.991 for shear studs and 1.588 for stirrups, consistent with values observed for concrete with natural aggregate. Comparison of the punching failure zones showed similar behavior of the flat slabs with and without CRCA. The study shows the applicability of current design models from the relevant code of practice for predicting punching shear capacity of flat slabs cast with concrete containing CRCA.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent13
dc.format.extent63051
dc.identifier.doi10.1016/j.rineng.2026.111828
dc.identifier.issn2590-1230
dc.identifier.otherPURE: 173183291
dc.identifier.otherPURE UUID: ff392d8e-b735-46e8-a1bd-e31c89398bef
dc.identifier.otherScopus: 105044180456
dc.identifier.otherORCID: /0000-0001-9496-4991/work/226378105
dc.identifier.urihttp://hdl.handle.net/10362/206283
dc.identifier.urlhttps://www.scopus.com/pages/publications/105044180456
dc.language.isoeng
dc.peerreviewedyes
dc.subjectCoarse recycled concrete aggregate
dc.subjectFlat slab
dc.subjectPunching capacity
dc.subjectPunching shear
dc.subjectShear reinforcement
dc.subjectGeneral Engineering
dc.titleImpact of coarse recycled concrete aggregate on punching shear performance of flat slabs with and without shear reinforcementen
dc.typejournal article
degois.publication.titleResults in Engineering
degois.publication.volume32
dspace.entity.typePublication
rcaap.rightsopenAccess

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