Eco-Friendly Structural Solutions: The Synergy of Waste Rubber and Hemp Fibers in Sustainable Concrete Design

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dc.contributor.authorThansirichaisree, Phromphat
dc.contributor.authorMohamad, Hisham
dc.contributor.authorChaimahawan, Preeda
dc.contributor.authorHussain, Qudeer
dc.contributor.authorJirasakjamroonsri, Amornthep
dc.contributor.authorSaingam, Panumas
dc.contributor.authorAhmad, Afaq
dc.date.accessioned2026-08-06T10:53:46Z
dc.date.available2026-08-06T10:53:46Z
dc.date.issued2026-01-01
dc.description.abstractThe growing emphasis on sustainable construction has encouraged the integration of recycled and renewable materials into structural concrete. This study investigates the axial compressive behavior of rectangular columns incorporating waste-tire rubber as a partial replacement of fine aggregate (5% and 10%) and external confinement using low-cost hemp ropes. A total of twelve specimen configurations, including unconfined and hemp-confined columns with up to three wrapping layers, were tested under monotonic axial compression. The results show that rubber inclusion reduces initial stiffness and peak strength by up to 46%, yet significantly enhances deformability. Hemp-rope confinement effectively compensates for strength loss, increasing compressive strength by up to 53% and ultimate strain by over 500%, with more pronounced effects in rubberized mixes. Normalized strength and strain trends demonstrate a strong dependence on confinement ratio, particularly for highly deformable concrete. To generalize these behaviors, Popovics-based models were calibrated using nonlinear regression, yielding high predictive accuracy (R<sup>2</sup> = 0.94–0.98) for key parameters including peak stress, peak strain, post-peak modulus, and elastic modulus. The proposed expressions closely reproduce the experimental stress–strain response and provide practical tools for modeling confined conventional and rubberized concrete.
dc.identifier.citationJournal of Natural Fibers, 23(1), 2026
dc.identifier.doi10.1080/15440478.2026.2665745
dc.identifier.issn15440478
dc.identifier.other2-s2.0-105038366600
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/17644
dc.sourceJournal of Natural Fibers
dc.subjectanalytical modeling
dc.subjecthemp confinement
dc.subjectrectangular compression members
dc.subjectRubberized concrete
dc.subjectstress–strain behavior
dc.subjectsustainable materials
dc.titleEco-Friendly Structural Solutions: The Synergy of Waste Rubber and Hemp Fibers in Sustainable Concrete Design
dc.typeArticle

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