Sasobit-Modified Asphalt Binder Rheology
Publication: Journal of Materials in Civil Engineering
Volume 29, Issue 9
Abstract
This research discusses the effect of Sasobit on asphalt binder rheology and how different percentages of Sasobit affect its performance. Evaluation is performed according to the Superpave test specifications. Tests include the rotational viscosity (RV), the dynamic shear rheometer (DSR), and the bending beam rheometer (BBR). Several rheological parameters are investigated: the dynamic viscosity (), the complex modulus (), the phase angle (), the creep stiffness (), and the m-value. The behavior of modified asphalt binder is investigated at a wide range of temperatures (–160°C). Results show an improvement of the asphalt binder performance at high temperatures, but adverse effects on asphalt binder performance at the low temperatures are observed. The optimum percentage of Sasobit is found to be 2% by mass of the asphalt binder; higher percentages are not recommended.
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Acknowledgments
The authors would like to thank Sasol Wax (Sasolburg, South Africa) for providing the Sasobit material for testing.
References
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 29 • Issue 9 • September 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Sep 3, 2016
Accepted: Mar 1, 2017
Published online: May 27, 2017
Published in print: Sep 1, 2017
Discussion open until: Oct 27, 2017
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