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Self-sensing cementitious composites with hierarchical carbon fiber-carbon nanotube composite fillers for crack development monitoring of a maglev girder
Ding, S. Wang, X. Qui, L. Ni, Y-Q. Dong, X. Cui, Y. Han, B. Ou, J.
Ding, S.
Wang, X.
Qui, L.
Ni, Y-Q.
Dong, X.
Cui, Y.
Han, B.
Ou, J.
Publication Date
2023
End of Embargo
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© 2023 Wiley
This is the peer reviewed version of the following article: 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. 19(9): 2206258, 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.
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openAccess
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2022-12-06
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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.
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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. 19(9): 2206258.
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