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    Self-sensing cementitious composites with hierarchical carbon fiber-carbon nanotube composite fillers for crack development monitoring of a maglev girder

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    Publication date
    2023
    End of Embargo
    2023-12-20
    Author
    Ding, S.
    Wang, X.
    Qui, L.
    Ni, Y-Q.
    Dong, X.
    Cui, Y.
    Ashour, Ashraf F.
    Han, B.
    Ou, J.
    Keyword
    Self-sensing cementitious composites
    Carbon nanotubes
    Carbon fibers
    In-situ synthesis
    Crack/damage monitoring of maglev girder
    Rights
    © 2023 Wiley This is the peer reviewed version of the following article: [FULL CITE], which has been published in final form at https://doi.org/10.1002/smll.202206258. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
    Peer-Reviewed
    Yes
    Open Access status
    embargoedAccess
    
    Metadata
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    Abstract
    In view of high-performance, multifunctional and low-carbon development of infrastructures, there is a growing demand for smart engineering materials, making infrastructures intelligent. This paper reports a new-generation self-sensing cementitious composite (SSCC) incorporated with a hierarchically structured carbon fiber-carbon nanotube composite filler (CF-CNT), which is in-situ synthesized by directly growing CNT on CF. Various important factors including catalyst, temperature, and gas composition are considered to investigate their kinetic and thermodynamic influence on CF-CNT synthesis. The reciprocal architecture of CF-CNT not only alleviates the CNT aggregation, but also significantly improves the interfacial bonding between CF-CNTs and matrix. Due to the synergic and spatially morphological effects of CF-CNT, i.e., the formation of widely distributed multiscale reinforcement networks, SSCCs with CF-CNTs exhibit high mechanical properties and electrical conductivity as well as excellent self-sensing performances, particularly enhanced sensing repeatability. Moreover, the SSCCs with CF-CNTs are integrated into a full-scale maglev girder to devise a smart system for crack development monitoring. The system demonstrates high sensitivity and fidelity to capture the initiation of cracks/damage, as well as progressive and sudden damage events until complete failure of the maglev girder, indicating its considerable potential for structural health monitoring of infrastructures.
    URI
    http://hdl.handle.net/10454/19277
    Version
    Accepted manuscript
    Citation
    Ding S, Wang X, Qiu L et al (2023) Self-sensing cementitious composites with hierarchical carbon fiber-carbon nanotube composite fillers for crack development monitoring of a maglev girder. Small. Accepted for publication.
    Link to publisher’s version
    https://doi.org/10.1002/smll.202206258
    Type
    Article
    Notes
    The full-text of this article will be released for public view at the end of the publisher embargo on 20th Dec 2023.
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