Piezoresistivity enhancement of functional carbon black filled cement-based sensor using polypropylene fibre

Wenkui Dong; Wengui Li; Kejin Wang; Yipu Guo; Daichao Sheng; Surendra P. Shah

doi:10.1016/j.powtec.2020.06.029

Piezoresistivity enhancement of functional carbon black filled cement-based sensor using polypropylene fibre

Wenkui Dong, Wengui Li^*, Kejin Wang, Yipu Guo, Daichao Sheng, Surendra P. Shah

^*Corresponding author for this work

Civil and Environmental Engineering

Research output: Contribution to journal › Article › peer-review

75 Scopus citations

Abstract

In this study, different dosages of carbon black (CB) and polypropylene (PP) were added to develop functional cementitious composites as cement-based sensors. The results show that electrical conductivity increased with the amount of PP fibres, due to the enclosed CB nanoparticles and more conductive passages. The compressive strength slightly decreased, while the flexural strength was significantly increased with the increased amount of PP fibres. The improvement is mainly achieved by the reduced CB concentration in cement matrix and the excellent tensile strength of PP fibres. Under the cyclic compression, the piezoresistivity increased by three times for 0.4 wt% PP fibres filled CB/cementitious composite, regardless of the loading rates. The flexural stress sensing efficiency was considerably lower than that of compressive stress sensing, but it increased with the amount of PP fibres. Moreover, fitting formulas were proposed and used to evaluate the self-sensing capacity, with the attempts to apply cement-based sensors for structural health monitoring.

Original language	English (US)
Pages (from-to)	184-194
Number of pages	11
Journal	Powder Technology
Volume	373
DOIs	https://doi.org/10.1016/j.powtec.2020.06.029
State	Published - Aug 2020

Funding

The authors appreciate the supports from the Australian Research Council (ARC) ( DE150101751 ), University of Technology Sydney Research Academic Program at Tech Lab (UTS RAPT), University of Technology Sydney (UTS) Tech Lab Blue Sky Research Scheme , and the Systematic Projects of Guangxi Key Laboratory of Disaster Prevention and Structural Safety (Guangxi University) , China ( 2019ZDX004 ) and State Key Laboratory of Subtropical Building Science (South China University of Technology) , China ( 2019ZA06 ). The authors appreciate the supports from the Australian Research Council (ARC) (DE150101751), University of Technology Sydney Research Academic Program at Tech Lab (UTS RAPT), University of Technology Sydney (UTS) Tech Lab Blue Sky Research Scheme, and the Systematic Projects of Guangxi Key Laboratory of Disaster Prevention and Structural Safety (Guangxi University), China (2019ZDX004) and State Key Laboratory of Subtropical Building Science (South China University of Technology), China (2019ZA06).

Keywords

Carbon black
Cement-based sensor
Microstructure
Piezoresistivity
Polypropylene fibre

ASJC Scopus subject areas

General Chemical Engineering

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10.1016/j.powtec.2020.06.029

Cite this

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title = "Piezoresistivity enhancement of functional carbon black filled cement-based sensor using polypropylene fibre",

abstract = "In this study, different dosages of carbon black (CB) and polypropylene (PP) were added to develop functional cementitious composites as cement-based sensors. The results show that electrical conductivity increased with the amount of PP fibres, due to the enclosed CB nanoparticles and more conductive passages. The compressive strength slightly decreased, while the flexural strength was significantly increased with the increased amount of PP fibres. The improvement is mainly achieved by the reduced CB concentration in cement matrix and the excellent tensile strength of PP fibres. Under the cyclic compression, the piezoresistivity increased by three times for 0.4 wt% PP fibres filled CB/cementitious composite, regardless of the loading rates. The flexural stress sensing efficiency was considerably lower than that of compressive stress sensing, but it increased with the amount of PP fibres. Moreover, fitting formulas were proposed and used to evaluate the self-sensing capacity, with the attempts to apply cement-based sensors for structural health monitoring.",

keywords = "Carbon black, Cement-based sensor, Microstructure, Piezoresistivity, Polypropylene fibre",

author = "Wenkui Dong and Wengui Li and Kejin Wang and Yipu Guo and Daichao Sheng and Shah, {Surendra P.}",

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language = "English (US)",

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AU - Dong, Wenkui

AU - Li, Wengui

AU - Wang, Kejin

AU - Guo, Yipu

AU - Sheng, Daichao

AU - Shah, Surendra P.

PY - 2020/8

Y1 - 2020/8

N2 - In this study, different dosages of carbon black (CB) and polypropylene (PP) were added to develop functional cementitious composites as cement-based sensors. The results show that electrical conductivity increased with the amount of PP fibres, due to the enclosed CB nanoparticles and more conductive passages. The compressive strength slightly decreased, while the flexural strength was significantly increased with the increased amount of PP fibres. The improvement is mainly achieved by the reduced CB concentration in cement matrix and the excellent tensile strength of PP fibres. Under the cyclic compression, the piezoresistivity increased by three times for 0.4 wt% PP fibres filled CB/cementitious composite, regardless of the loading rates. The flexural stress sensing efficiency was considerably lower than that of compressive stress sensing, but it increased with the amount of PP fibres. Moreover, fitting formulas were proposed and used to evaluate the self-sensing capacity, with the attempts to apply cement-based sensors for structural health monitoring.

AB - In this study, different dosages of carbon black (CB) and polypropylene (PP) were added to develop functional cementitious composites as cement-based sensors. The results show that electrical conductivity increased with the amount of PP fibres, due to the enclosed CB nanoparticles and more conductive passages. The compressive strength slightly decreased, while the flexural strength was significantly increased with the increased amount of PP fibres. The improvement is mainly achieved by the reduced CB concentration in cement matrix and the excellent tensile strength of PP fibres. Under the cyclic compression, the piezoresistivity increased by three times for 0.4 wt% PP fibres filled CB/cementitious composite, regardless of the loading rates. The flexural stress sensing efficiency was considerably lower than that of compressive stress sensing, but it increased with the amount of PP fibres. Moreover, fitting formulas were proposed and used to evaluate the self-sensing capacity, with the attempts to apply cement-based sensors for structural health monitoring.

KW - Carbon black

KW - Cement-based sensor

KW - Microstructure

KW - Piezoresistivity

KW - Polypropylene fibre

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Piezoresistivity enhancement of functional carbon black filled cement-based sensor using polypropylene fibre

Abstract

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Keywords

ASJC Scopus subject areas

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