Diffusion and Rheological Properties of Asphalt Modified by Bio-Oil Regenerant Derived from Waste Wood
Publication: Journal of Materials in Civil Engineering
Volume 30, Issue 2
Abstract
To decrease the usage of energy and improve waste recovery, dynamic simulations are conducted to understand the diffusion mechanism and rheological properties of bio-oil regenerated asphalt. A new simplified model of bio-oil modified asphalt (BMA) is built to calculate diffusion coefficients, diffusion driving force, viscosity, solubility parameters, and ductility. The calculated diffusion coefficients of bio-oil, asphaltenes, saturates, and resins are , , , and at 298 K, respectively. Results indicate that the bio-oil diffuses faster than asphaltenes, saturates, and resins, and that it can increase the ductility of asphalt and improve asphalt’s elastic property. Moreover, potential energy is the key driving force of diffusion. There is no chemical reaction involved in the diffusion process of BMA and bio-oil can both reduce the viscosity of asphalt and soften it.
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Acknowledgments
The authors are supported by the National Natural Science Foundation of China (No. 51308329), the Science and Technology Department of Shanxi Province International Cooperation (Nos. 201603D421027 and 201703D42111474), the Shanxi Provincial Key Research and Development Program (No. 201603D321118), and the Science and Technology Planning Project of Transport Department of Shanxi Province (Nos. 2017-1-16 and 2016-1-14). The author would like to thank Shiyanjia Lab.
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Published In
Journal of Materials in Civil Engineering
Volume 30 • Issue 2 • February 2018
Copyright
©2017 American Society of Civil Engineers.
History
Received: May 5, 2017
Accepted: Jul 19, 2017
Published online: Nov 27, 2017
Published in print: Feb 1, 2018
Discussion open until: Apr 27, 2018
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