Improving bond performance of ribbed steel bars embedded in recycled aggregate concrete using steel mesh fabric confinement

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dc.contributor.authorFayed, Sabry
dc.contributor.authorMadenci, Emrah
dc.contributor.authorOzkilic, Yasin Onuralp
dc.contributor.authorMansour, Walid
dc.date.accessioned2024-02-23T14:02:39Z
dc.date.available2024-02-23T14:02:39Z
dc.date.issued2023
dc.departmentNEÜen_US
dc.description.abstractTo investigate the bond behaviour of passively confined-recycled aggregate concrete (RAC), centre pull out tests were carried out on deformed steel bar with a diameter (O) of 12 mm. The recycled concrete aggregate (RCA) replacement ratios are 0, 30, 50, and 100 %. To investigate local bond strength, a short anchorage bonded length (La) of 10 was chosen. Steel mesh fabric (SMF) cylinders were used to confine the RAC around the bonded length of the bar. SMFs have diameters of 4O and 6O. SMF cylinder reinforcement ratios were estimated to be 0, 2.33, 3.04, 3.5, and 4.56 %. To accurately estimate maximal rising ratios in bond strength response owing to RAC confinement using SMFs, all specimens are intended to fail in the pull out mode (rather than the splitting mode). Unconfined and confined pull out specimens were tested for failure mechanism, ultimate local bond strength, bond stress-slip response, and ductility. When compared to similar unconfined specimens, confinement utilising SMFs dramatically improved bond stress-slip behaviour for all specimens including RCA. Ultimate bond strengths of RAC-unconfined specimens were 3.7-24.5 % lower than those of NAC-unconfined specimens, whereas ulti-mate slips of RAC-unconfined specimens were 25-140 % higher than those of NAC-unconfined specimens. Due to the usage of SMF cylinders at various levels of RCA, the ultimate bond strength of all confined specimens was dramatically increased when compared to unconfined specimens. When compared to a control unconfined NAC-specimen, the ductility of unconfined specimens containing 30 %, 50 %, and 100 % RCA decreased by 5.7, 18.6, and 39.6 %, respectively. In comparison, when compared to similar unconfined specimens, the maximum rising ratios in the ductility of confined specimens containing 0 % RCA, 30 % RCA, 50 % RCA, and 100 % RCA are 44.2 %, 77.9 %, 52.4, and 117.7 %, respectively. A novel proposed formula is developed to compute the ultimate bond strength of RAC while taking into account the influence of concrete grade, RCA content, concrete confinement via SMF, and transverse ties, and its results agree with the experimental results.en_US
dc.identifier.doi10.1016/j.conbuildmat.2023.130452
dc.identifier.issn0950-0618
dc.identifier.issn1879-0526
dc.identifier.scopus2-s2.0-85147257541en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1016/j.conbuildmat.2023.130452
dc.identifier.urihttps://hdl.handle.net/20.500.12452/11790
dc.identifier.volume369en_US
dc.identifier.wosWOS:000927352700001en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Sci Ltden_US
dc.relation.ispartofConstruction And Building Materialsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectRecycled Concreteen_US
dc.subjectPull Out Testen_US
dc.subjectConcrete Confinementen_US
dc.subjectSteel Mesh Fabricen_US
dc.subjectBond Strengthen_US
dc.subjectBond Stress-Slip Responseen_US
dc.subjectDuctilityen_US
dc.titleImproving bond performance of ribbed steel bars embedded in recycled aggregate concrete using steel mesh fabric confinementen_US
dc.typeArticleen_US

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