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The Scientific World Journal
Volume 2013, Article ID 735640, 10 pages
Research Article

SGC Tests for Influence of Material Composition on Compaction Characteristic of Asphalt Mixtures

1School of Traffic and Transportation Engineering, Central South University, Railway Campus, Changsha 410075, China
2Changsha University of Science and Technology, Changsha 410076, China

Received 31 March 2013; Accepted 12 May 2013

Academic Editors: J. Assaad and F. Pacheco Torgal

Copyright © 2013 Qun Chen and Yuzhi Li. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Compaction characteristic of the surface layer asphalt mixture (13-type gradation mixture) was studied using Superpave gyratory compactor (SGC) simulative compaction tests. Based on analysis of densification curve of gyratory compaction, influence rules of the contents of mineral aggregates of all sizes and asphalt on compaction characteristic of asphalt mixtures were obtained. SGC Tests show that, for the mixture with a bigger content of asphalt, its density increases faster, that there is an optimal amount of fine aggregates for optimal compaction and that an appropriate amount of mineral powder will improve workability of mixtures, but overmuch mineral powder will make mixtures dry and hard. Conclusions based on SGC tests can provide basis for how to adjust material composition for improving compaction performance of asphalt mixtures, and for the designed asphalt mixture, its compaction performance can be predicted through these conclusions, which also contributes to the choice of compaction schemes.