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Advances in Materials Science and Engineering
Volume 2017, Article ID 3623658, 7 pages
https://doi.org/10.1155/2017/3623658
Research Article

Fatigue Evaluation of Recycled Asphalt Mixture Based on Energy-Controlled Mode

1School of Transportation, Southeast University, Nanjing, Jiangsu 210096, China
2State Engineering Laboratory of Highway Maintenance Technology, Changsha University of Science and Technology, Changsha 410114, China

Correspondence should be addressed to Tao Ma; nc.ude.ues@oatam

Received 14 April 2017; Revised 5 July 2017; Accepted 14 August 2017; Published 14 September 2017

Academic Editor: Meor Othman Hamzah

Copyright © 2017 Tao Ma 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

The fatigue properties of asphalt mixtures are important inputs for mechanistic-empirical pavement design. To understand the fatigue properties of asphalt mixtures better and to predict the fatigue life of asphalt mixtures more precisely, the energy-controlled test mode was introduced. Based on the implementation theory, the laboratory practice for the energy-controlled mode was realized using a four-point-bending fatigue test with multiple-step loading. In this mode, the fatigue performance of typical AC-20 asphalt specimens with various reclaimed asphalt pavement (RAP) contents was tested and evaluated. Results show that the variation regulation of the dissipated energy and accumulative energy is compatible with the loading control principle, which proves the feasibility of the method. In addition, the fatigue life of the asphalt mixture in the energy-controlled mode was between that for the stress-controlled and strain-controlled modes. The specimen with a higher RAP content has a longer fatigue life and better fatigue performance.