Ability of Nanomaterials to Effectively Disperse in Asphalt Binders for Use as a Modifier
Publication: Journal of Materials in Civil Engineering
Volume 30, Issue 8
Abstract
Several studies have investigated the use of nanomaterials to modify asphalt binders and achieve improved properties. It is possible that in some cases nanomaterials do not disperse and agglomerate within the asphalt binder. In such cases, the benefits from the addition of these nanoscale modifiers are limited and are likely driven by mechanisms that can potentially be achieved using larger filler-sized materials. This study investigates the dispersion characteristics of a selected set of nanomaterials in surrogate solvents that represent a physicochemical environment similar to that of asphalt binders. The study also investigates the influence of these nanomaterials on the performance characteristics of asphalt binders. Results show that among the nanomaterials evaluated, those that tend to disperse relatively better in the surrogate environment, i.e., retain their nanoscale identity better relative to others, also tend to show a relatively better performance in terms of rheological properties. This is especially true at low temperatures.
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Acknowledgments
The authors would also like to acknowledge the Texas Department of Transportation for funding this study. The authors would like to acknowledge Dr. Enad Mahmoud for his help with providing nano-glass for this study.
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Published In
Journal of Materials in Civil Engineering
Volume 30 • Issue 8 • August 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Jun 4, 2017
Accepted: Dec 22, 2017
Published online: May 26, 2018
Published in print: Aug 1, 2018
Discussion open until: Oct 26, 2018
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