Influence of Carbon Nanoparticles on the Rheological Characteristics of Short-Term Aged Asphalt Binders
Publication: Journal of Materials in Civil Engineering
Volume 23, Issue 4
Abstract
Nanotechnology has the potential to create many new materials and devices with wide-ranging purposes. Nano-sized particles have been used in numerous applications to improve the properties of various materials. The utilization of nanotechnology in civil engineering is expected to increase and may become an attractive alternative for asphalt binder modification. The objective of this study was to investigate and evaluate the rheological properties of binders containing various percentages of carbon nanoparticles after a short-term aging process. The experimental design for this study included five binder sources (three grades including PG 64-22, PG 64-16, and PG 52-28), three nano percentages (0.5, 1.0, and 1.5% by weight of the virgin binder), and control binders. The rheological characteristics of the rolling thin film oven (RTFO) binders, including failure temperature, performance grade, creep and creep recovery, viscous flow, and frequency and amplitude sweep, were tested. The results of the experiments indicated that the addition of nanoparticles was helpful in increasing the failure temperature, complex modulus, and elastic modulus values and in improving rutting resistance of the RTFO binder. The phase angle of the binders generally decreased with an increase in nano content and RTFO aging procedure. In addition, statistical analysis indicated that the asphalt binder source plays a key role in determining the rheological properties because of significant evaluations.
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Acknowledgments
The financial support of UNSPECIFIEDSouth Carolina Department of Health and Environmental Control (SC DHEC) is greatly appreciated. However, the results and opinions presented in this paper do not necessarily reflect the view and policy of the SC DHEC.
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Information
Published In
Journal of Materials in Civil Engineering
Volume 23 • Issue 4 • April 2011
Pages: 423 - 431
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Nov 25, 2009
Accepted: Sep 24, 2010
Published online: Sep 25, 2010
Published in print: Apr 1, 2011
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