Effect of Compressive Strain on Electrical Resistivity of Carbon Nanotube Cement-Based Composites

Abstract:

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Multi-walled carbon nanotube (MWCNT) fiber reinforced cement-based composites (MWFRC) with 0.1 wt.% and 0.5 wt.% weight concentration of MWCNT (wcM)were prepared, associated with the reference. The electrical resistances and compressive strains of these cured nanocomposites under cyclic uploading/unloading were real-time collected, to explore their stress/strain-sensitive properties. Results reveal as follows, there is no self-sensing trait for the reference, but exists good piezoresisitivity and high strain sensitivity (above 110) for MWFRC; the fractional change in resistivity (Δρ) regularly descends or ascends following the compressive stress, or the longitudinal strain of MWFRC; the resistance caused by pore electrolyte polarization has obvious impact on the time-stability of the Δρ trendline of MWFRC with 0.1 wt.% wcM, similar to the reference, but negligible effect on that of MWFRC with 0.5 wt.% wcM.

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Periodical:

Edited by:

Xiaohao Wang

Pages:

579-583

DOI:

10.4028/www.scientific.net/KEM.483.579

Citation:

J. L. Luo et al., "Effect of Compressive Strain on Electrical Resistivity of Carbon Nanotube Cement-Based Composites", Key Engineering Materials, Vol. 483, pp. 579-583, 2011

Online since:

June 2011

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$35.00

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