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Short-term flexural performance of seawater-mixed recycled-aggregate GFRP-reinforced concrete beams
Qatar University, Doha, Qatar.ORCID iD: 0000-0003-2273-6863
Qatar University, Doha, Qatar.
University of Miami, Coral Gables, FL, USA.
University of Miami, Coral Gables, FL, USA.
2020 (English)In: Composite structures, ISSN 0263-8223, E-ISSN 1879-1085, Vol. 236, article id 111860Article in journal (Refereed) Published
Abstract [en]

Combining seawater, recycled coarse aggregate (RCA), and glass fiber reinforced polymer(GFRP) reinforcement in concrete is potentially advantageous from a sustainability perspective. This paper reports on the results of an experimental study on the short-term flexural performance of seawater-mixed recycled-aggregate concrete beams with GFRP bars. Twelve medium-scale reinforced concrete (RC) beams ( mm) were tested under four-point loading. The test variables included the mixing water (seawater/freshwater), aggregate type (conventional/recycled), and reinforcement material (black steel/GFRP). A wide range of flexural properties, including failure mode, cracking behavior, load-carrying capacity, deformation, energy absorption, and ductility were characterized and compared among the beam specimens. The results suggest that the use of seawater and RCA in concrete has insignificant effects on the flexural capacityof RC beams, especially if concrete strength is preserved by adjusting the mixture design. Altering reinforcement material had a strong influence on the flexural capacity and performance of the tested specimens: the GFRP-RC beams exhibited higher load-carrying capacities (on average 25%) but inferior deformational characteristics as compared to their steel-reinforced counterparts. Theoretical predictions were obtained for the flexural capacity, crack width, and deflection of steel- and GFRP-RC beams based on their corresponding design guides, and compared with the experimental results.

Place, publisher, year, edition, pages
2020. Vol. 236, article id 111860
Keywords [en]
Sustainable concrete, GFRP-reinforced concrete, Recycled-aggregate concrete, Seawater-mixed concrete, Flexural performance, Reinforced concrete beams
National Category
Building Technologies
Identifiers
URN: urn:nbn:se:hh:diva-48991DOI: 10.1016/j.compstruct.2020.111860Scopus ID: 2-s2.0-85077754493OAI: oai:DiVA.org:hh-48991DiVA, id: diva2:1721420
Available from: 2022-12-21 Created: 2022-12-21 Last updated: 2023-02-16Bibliographically approved

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Younis, Adel

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CiteExportLink to record
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  • apa
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