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    Improving bond of fiber-reinforced polymer bars with concrete through incorporating nanomaterials  

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    Publication date
    2022-06
    End of Embargo
    2023-05-11
    Author
    Wang, X.
    Ding, S.
    Qiu, L.
    Ashour, Ashraf A.
    Wang, Y.
    Han, B.
    Ou, J.
    Keyword
    Concrete
    Fiber-reinforced polymer bars
    Nanomaterials
    Bond
    Interface
    Rights
    © 2022 Elsevier. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.
    Peer-Reviewed
    Yes
    Open Access status
    openAccess
    
    Metadata
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    Abstract
    The bond between FRP bars and concrete, the foremost performance for implementation of such reinforcements to corrosion-free concrete structures, is still unsatisfied due to the weak nature of duplex film in the interface. The existing approaches show low efficiency in improving the microstructures and bond between FRP bars and concrete. To address these issues, this paper provided a new approach for improving the bond between FRP bars and concrete by incorporating nanomaterials, as well as explored the modifying mechanisms and established the bond-slip models. For these purposes, the pull-out test, scanning electron microscope observation, as well as energy dispersive spectrometry analysis were performed. The experimental results demonstrated that the presence of nanomaterials increased the ultimate bond strengths between glass/carbon FRP bars and concrete by up to 16.2% and 37.8%, while the corresponding slips decreased by 28.7% and 35.4%, respectively. Such modification effects can be attributed to the optimized intrinsic composition and the reduced pore content of hydration products in the interface, especially in the duplex film, through the nanomaterial enrichment and nano-core effects. The bond-slip relationship between FRP bars and concrete with nanomaterials can be accurately predicted by the mBPE model.
    URI
    http://hdl.handle.net/10454/18963
    Version
    Accepted manuscript
    Citation
    Wang X, Ding S, Qiu L et al (2022) Improving bond of fiber-reinforced polymer bars with concrete through incorporating nanomaterials. Composites Part B: Engineering. 239: 109960.
    Link to publisher’s version
    https://doi.org/10.1016/j.compositesb.2022.109960
    Type
    Article
    Notes
    The full-text of this article will be released for public view at the end of the publisher embargo on 11th May 2023.
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    Engineering and Informatics Publications

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