Abstract
Nanotechnology has the potential to create many new materials and devices with wide-ranging purposes. Carbon nanotubes (CNTs) have been used in numerous applications to improve the properties of various materials. The objective of this study was to investigate and evaluate the rheological characteristics of asphalt binders and mixtures containing carbon nanotubes. The experimental design for this study included three binder sources, base asphalt, styrene-butadiene-styrene (SBS) modified asphalt, and CNTs modified asphalt (1 % weight of the base asphalt). Various binder test including penetration, ductility, softening point, dynamic shear rheometer (DSR) and beam bending rheometer tests were utilized to determine rheological properties of three asphalt binders. Dynamic modulus test was also conducted to testify the results obtain from binders at mixture scale. The results indicate that the CNTs modified asphalt exhibit improved viscoelastic response and resistance to rutting. Moreover, the aging resistance of base binder has a substantial increase due to the addition of CNTs. However, the low-temperature performance of CNTs modified asphalt was not encouraging. The stiffing effect of CNTs is also verified in asphalt mixture in terms of dynamic modulus.
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Acknowledgement
The authors gratefully acknowledge the financial support of National Engineering Laboratory for Advanced Materials and the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20120092110053).
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Wang, H., Yang, J., Gong, M. (2016). Rheological Characterization of Asphalt Binders and Mixtures Modified with Carbon Nanotubes. In: Canestrari, F., Partl, M. (eds) 8th RILEM International Symposium on Testing and Characterization of Sustainable and Innovative Bituminous Materials. RILEM Bookseries, vol 11. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-7342-3_12
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DOI: https://doi.org/10.1007/978-94-017-7342-3_12
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