Wet joint performance of 3D printed concrete beam segments under flexural loading

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dc.contributor.authorAramburu, A.
dc.contributor.authorCalderon-Uriszar-Aldaca, I.
dc.contributor.authorPuente, I.
dc.contributor.institutionECOEFICIENCIA DE PRODUCTOS DE CONSTRUCCIÓN
dc.contributor.institutionTecnalia Research & Innovation
dc.date.issued2023-08-15
dc.descriptionPublisher Copyright: © 2023 Elsevier Ltd
dc.description.abstractA segmented 3D-printed concrete (3DPC) beam is designed whose structural reliability depends on a rebar that can withstand tensile stress at the joints between segments under bending moments. In this study, a new approach is for the first time presented on rebar placement after concrete hardening. It details an innovative testing procedure of joint behavior and bonding strength through the use of 3DCP beam segments assembled to form T-shaped beams with an underside groove into which a rebar is inserted. The bonding strength of the rebar embedded in mortar within the semi-circular groove and the wet joints between segments are characterized and validated. Different variables are considered in the modularization of the 3DPC beam segments and bonding stresses between rebar and concrete are studied. To do so, the beam test procedure was adapted to 3DPC beam segments with 3 rebar diameters and 2 segment lengths subjected to 3-point and 4-point bending flexural tests. As a main finding, the results of this research indicated that both rebar and matrix, when properly designed, underwent bonding failure at loads above their theoretical ultimate limit design values, at the yield point of the rebar steel, demonstrating that placement of rebars after hardening of the 3DPC segments can therefore form a structurally reliable joint.en
dc.description.sponsorshipThe authors wish to thank the assistance received from the staff of the 3D-printing laboratory of Tecnalia, (especially A. Salvador, R. Castaño and J. Roncero), the students (especially, O. García and M. Kawka), and the laboratory technician (A. López) from Tecnun – University of Navarra for assisting with the university laboratory tests and measurements and documenting the test results, and the technical manager of Gallardo Engineering (A. Herrero) for the ideas that helped to focus this research. Financial support is also gratefully acknowledged, both from the SPRI research program funded by the Basque Government under project ERRAIL ZL-2020/00940 and ZL-2021/00181 and project NEOMAT KK-2021/00059. Financial support is also gratefully acknowledged, both from the SPRI research program funded by the Basque Government under project ERRAIL ZL-2020/00940 and ZL-2021/00181 and project NEOMAT KK-2021/00059 .
dc.description.statusPeer reviewed
dc.identifier.citationAramburu , A , Calderon-Uriszar-Aldaca , I & Puente , I 2023 , ' Wet joint performance of 3D printed concrete beam segments under flexural loading ' , Journal of Building Engineering , vol. 73 , 106728 . https://doi.org/10.1016/j.jobe.2023.106728
dc.identifier.doi10.1016/j.jobe.2023.106728
dc.identifier.issn2352-7102
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=85159584344&partnerID=8YFLogxK
dc.language.isoeng
dc.relation.ispartofJournal of Building Engineering
dc.relation.projectIDTecnun – University of Navarra
dc.relation.projectIDEusko Jaurlaritza, ZL-2021/00181-KK-2021/00059-ERRAIL ZL-2020/00940
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subject.keywords3DPC beam Segments
dc.subject.keywordsBending tests
dc.subject.keywordsMechanical behavior
dc.subject.keywordsRebar bonding strength
dc.subject.keywordsWet joint
dc.subject.keywordsCivil and Structural Engineering
dc.subject.keywordsArchitecture
dc.subject.keywordsBuilding and Construction
dc.subject.keywordsSafety, Risk, Reliability and Quality
dc.subject.keywordsMechanics of Materials
dc.titleWet joint performance of 3D printed concrete beam segments under flexural loadingen
dc.typejournal article
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