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Advances in Materials Science and Engineering
Volume 2017, Article ID 2394945, 9 pages
https://doi.org/10.1155/2017/2394945
Research Article

Design and Performance of Anticracking Asphalt-Treated Base

1Changsha University of Science & Technology, Changsha, Hunan 410114, China
2Guangzhou Highway Co. Ltd., Guangzhou, Guangdong 760000, China

Correspondence should be addressed to Xiaoge Tian; moc.621@egoaixnait

Received 28 February 2017; Accepted 12 April 2017; Published 22 May 2017

Academic Editor: Hainian Wang

Copyright © 2017 Xiaoge Tian et al. 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.

Abstract

To enhance the crack resistance of asphalt-treated base (ATB), a type of gapped and semiopened gradation ATB mixture, GSOG, was designed. Its design method was proposed based on the volume design method and performance tests. Firstly, several gradations were designed preliminarily in which middle particle sizes of coarse aggregates were partially or completely gapped according to the gradation specification. Secondly, their voids in coarse aggregates (VCA) were determined through dry rod compaction test on coarse aggregates, and then their theoretical voids were calculated. Gradations whose theoretical voids met the requirements were selected to fabricate specimens with Superpave Gyratory Compactor, and their voids were determined using vacuum sealing method and submerged weight in water method. Finally, gradations whose voids meet requirements were selected to fabricate different types of specimens for various performance tests, and the optimal gradation can be selected comprehensively considering their performances, especially focusing on their crack resistance. According to this gradation design method, the gradation of GSOG-25 was designed, and its performances, including high-temperature stability, water stability, fatigue, and antireflection crack resistance, were measured and compared to ordinary ATB-25. The results demonstrate that the performance of GSOG-25 is much better than that of ordinary ATB-25, especially in anticracking capacity.