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    Uniaxial compressive fatigue behavior of ultra-high performance concrete reinforced with super-fine stainless wires

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    Publication date
    2021-01
    End of Embargo
    2021-09-20
    Author
    Dong, S.
    Wang, Y.
    Ashour, Ashraf F.
    Han, B.
    Ou, J.
    Keyword
    Super-fine stainless wire
    Ultra-high performance concrete
    Fatigue life
    Damage evolution
    Microstructure
    Rights
    © 2020 Elsevier Ltd. All rights reserved. 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 (https://creativecommons.org/licenses/by/4.0/)
    Peer-Reviewed
    Yes
    
    Metadata
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    Abstract
    Super-fine stainless wires (SSWs) with micron diameter and large specific surface area can simultaneously strengthen and toughen reactive powder concrete (RPC) at low volume fraction, so SSW reinforced RPC composites have potential for developing infrastructures bearing fatigue load or with aseismic requirements. In this paper, the uniaxial compressive fatigue characteristics of such composites under high stress levels were investigated, and the modification mechanisms of SSWs to RPC were revealed through failure state and microstructure analyses. The results showed that incorporating only 0.5 vol.% SSWs into RPC enables the fatigue life and energy dissipation capacity to increase by 252.0% and 262.3%, meanwhile, the fatigue limit strength of composites at the failure probability of 50% reaches up to 76.6% of static uniaxial compressive strength, due to the improvement effect on microstructure compactness, inhibiting effect on flaw initiation, and the ability to convert single main crack into radial multiple micro cracks centered on SSWs. Furthermore, the average maximum fatigue strain and residual strain of composites are improved by 73.7% and 87.2%, respectively, which can be ascribed to the bridging, debonding and being pulled-off effect of SSWs. It can be therefore concluded that the incorporation of SSWs endows RPC with excellent fatigue performance, thus further enlarging the application of composites.
    URI
    http://hdl.handle.net/10454/18040
    Version
    Accepted manuscript
    Citation
    Dong S, Wang Y, Ashour A et al (2021) Uniaxial compressive fatigue behavior of ultra-high performance concrete reinforced with super-fine stainless wires. International Journal of Fatigue. 142: 105959.
    Link to publisher’s version
    https://doi.org/10.1016/j.ijfatigue.2020.105959
    Type
    Article
    Notes
    The full-text of this article will be released for public view at the end of the publisher embargo on 20 Sep 2021.
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    Engineering and Informatics Publications

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