Abstract
The self-monitoring application of asphalt concrete containing graphite and carbon fibers using indirect tensile test and wheel rolling test were introduced. The experiment results indicate that this kind of pitch-based composite is effective for strain/stress self-monitoring. In the indirect tensile test, for a completely conductive asphalt concrete specimen, the piezoresistivity was very weak and slightly positive, which meant the resistivity increase with the increment of tensile strain at all stress/strain amplitudes, with the gage factor as high as 6. The strain self-sensing ability was superior in the case of higher graphite content. However, when the conductive concrete was embedded into common asphalt concrete specimen as a partial structure function, the piezoresistivity was positive at all stress/strain amplitudes and with the gage factor of 13, which was much higher than that of completely conductive specimen. Thus, the strain self-sensing ability was superior when conductive asphalt concrete was taken in as a partial structure function. In the wheel-rolling test, the piezoresistivity was highly positive. At any stress amplitude, the piezoresistivity was strong, with the gage factor as high as 100, which was higher for a stress amplitude of 0.7 MPa than that of 0.5 MPa.
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Funded by the Outstanding Youth Foundation of Hubei Province (No.2004ABB019) and Program for New Century Excellent Talents in University, China (No.NCET-05-0665)
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Liu, X., Wu, S., Li, N. et al. Self-monitoring application of asphalt concrete containing graphite and carbon fibers. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 23, 268–271 (2008). https://doi.org/10.1007/s11595-006-2268-2
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DOI: https://doi.org/10.1007/s11595-006-2268-2