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Flexural Behaviour of Geopolymer Concrete T-beams Reinforced with FRP or Hybrid FRP/Steel bars

Hasan, Mohamad A.A.
Publication Date
2022
End of Embargo
Supervisor
Sheehan, Therese
Ashour, Ashraf
Keywords
Fibre-reinforced polymer, Hybrid reinforced system, Simply supported beams, T-beams, Geopolymer concrete, Conventional concrete, Finite element model, Ordinary Portland cement concrete (OPCC)
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Creative Commons License
The University of Bradford theses are licenced under a Creative Commons Licence.
Peer-Reviewed
Open Access status
Accepted for publication
Institution
University of Bradford
Department
Faculty of Engineering and Informatics
Awarded
2022
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PhD Thesis
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Abstract
Steel bar corrosion is the most severe failure mode of RC structures in corrosive environments. Deterioration has raised conservation and maintenance costs, which is a cause for concern for the construction industry. FRP bars are replaced for steel reinforcing bars in severe environments to prevent corrosion. Each tonne of OPCC produces an extra tonne of CO2. The OPCC must be replaced with binders that emit less CO2. Geopolymer binder is an alternative to Portland cement that does not emit CO2 during manufacture. GPC reinforced with any material should provide a building system that is durable, economical, and ecologically friendly. The main aim of this study is to examine the flexural behaviour of geopolymer concrete T-beams reinforced with GFRP or Hybrid GFRP/Steel bars. To achieve this aim, twelve geopolymer concrete flanged beams reinforced with various combinations with steel and GFRP bars were experimentally tested, and comprehensive computational finite element simulations and analytical studies were also carried out. For the first group, six full-scale simply supported T-beams were cast and tested; one control specimen was made with OPCC, while the other five beams were made of GPC. For second group, six full-scale T-Beams were cast including one using OPCC as the control beam. The main characteristics examined were the two types of reinforcement, GFRP and steel, reinforcement ratio, the type of concrete and concrete compressive strength. Based on the results of the experiments, the ultimate strain of GPC is not the same as that of OPCC, which affects the mode of failure.
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http://hdl.handle.net/10454/19880
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Type
Thesis
Qualification name
PhD
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