Carbon black enhanced cementitious composites for self-sensing micro strain

Carbon black enhanced cementitious composites for self-sensing micro strain

Zhoufeng Shi, Ye Lu

Abstract. As one of the non-destructive test methods, self-sensing cementitious composites have been developed for concrete structures to monitor the health condition. In this study, the focus was put on the self-sensing capacity for low amplitude strain which was often overlooked in the previous research. Carbon black nanoparticles were added as conductive filler in cementitious composites and their piezo-resistivities were recorded in low-amplitude cyclic loadings. Besides, hammer induced stress wave was utilized to activate the self-sensing mechanism in composites. Because the tunnelling effect occurs at several nanometres and is extremely sensitive to the micro strains, these signals were collected as the electrical resistance variance between two closely contacted electrodes and compared with the signals from lead zirconate titanate (PZT) sensors. The developed materials provides the potential of high-resolution strain measurement and stress wave detection without any external instruments.

Keywords
Self-Sensing, Carbon Black Nanoparticles, Micro Strain, Tunneling Effect

Published online 3/30/2023, 6 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Zhoufeng Shi, Ye Lu, Carbon black enhanced cementitious composites for self-sensing micro strain, Materials Research Proceedings, Vol. 27, pp 279-284, 2023

DOI: https://doi.org/10.21741/9781644902455-36

The article was published as article 36 of the book Structural Health Monitoring

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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