Influence of Commercial Wax on Performance of Asphalt
Publication: Journal of Materials in Civil Engineering
Volume 22, Issue 8
Abstract
The influence of the addition of one commercial wax, Sasobit, on two base asphalts was investigated as it relates to asphalt binder performance. Rheological effects of the wax were studied using a dynamic shear rheometer. A Fourier transform infrared (FTIR) spectrometer equipped with a Golden Gate attenuated total reflectance (ATR) apparatus was used to investigate the changes in chemical composition before and after addition of the wax. The surface free energy of the asphalt binders was determined by measurement of the static contact angle. Results showed that the addition of the wax enhanced the deformation resistance of the asphalt binders. The FTIR-ATR spectra showed that there was an increase only in the absorbance peak of the methylene group between 750 and with the addition of the wax. This indicates that there was no interaction between the asphalt and the wax. The wax can reduce the surface free energy of the binders and may increase the wetability of aggregates by asphalt binders.
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Acknowledgments
The writers gratefully acknowledge the financial assistance provided by the Federal Highway Administration, United States.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 22 • Issue 8 • August 2010
Pages: 760 - 766
Copyright
© 2010 ASCE.
History
Received: May 13, 2009
Accepted: Nov 5, 2009
Published online: Feb 6, 2010
Published in print: Aug 2010
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