Porosity of the Dominant Aggregate Size Range to Evaluate Coarse Aggregate Structure of Asphalt Mixtures
Publication: Journal of Materials in Civil Engineering
Volume 21, Issue 1
Abstract
This paper presents the results from an evaluation of a new gradation-based framework developed for identifying and assessing the coarse aggregate structure of dense-graded mixtures for resistance to rutting. A theoretical packing-based analysis procedure was used to evaluate the coarse aggregate structure for hot mix asphalt mixtures. This procedure was applied to an extensive range of mixtures. A key feature of this new framework is the concept of the existence of a dominant aggregate size range (DASR). The porosity of the DASR is calculated based on an interaction diagram to evaluate the degree of particle-to-particle interaction of coarse aggregates between contiguous sieve sizes. In addition, an interaction diagram-based criteria for dense-graded Superpave mixtures are determined, as well as criteria for the porosity of the DASR. Based on the field and laboratory-based rutting performance of the mixtures evaluated in this paper, it was concluded that DASR along with the porosity of the DASR may provide a framework for evaluating the gradation of dense graded mixtures for their likely rutting potential.
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Acknowledgments
The writers would like to express their gratitude to the Florida Department of Transportation and the Federal Highway Administration for providing the financial and technical support that made this research possible.
References
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 21 • Issue 1 • January 2009
Pages: 32 - 39
Copyright
© 2009 ASCE.
History
Received: Feb 7, 2007
Accepted: Jun 20, 2008
Published online: Jan 1, 2009
Published in print: Jan 2009
Notes
Note. Associate Editor: Louay N. Mohammad
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