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Published in:
2022 | OriginalPaper | Chapter
Effects of Binder Content, Filler Content, Air Void and Modification on Damage Characteristics of Asphalt Mix Under Fatigue Loading
Authors : Hamidreza Sahebzamani, Mohammad Zia Alavi, Orang Farzaneh, Serge Krafft
Published in: Proceedings of the RILEM International Symposium on Bituminous Materials
Publisher: Springer International Publishing
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Abstract
Evaluating the behavior of asphalt mixtures under repetitive loading is essential to understand the fatigue performance of flexible pavements over the service life. Fatigue loads cause damage in asphalt mixture medium, which results in the reduction of the mix stiffness. In this study, 21 types of asphalt mixes with different aggregate sources, asphalt binder contents, filler contents, air void levels, modifiers, and aging levels were evaluated for damage evolution due to repetitive loading. All mixtures were tested in unaged and long-term aged conditions. The dynamic modulus and the cyclic fatigue (Push-Pull) tests were performed on each mix to obtain mix stiffness, fatigue life, and the damage characteristics (C-S curves). The preliminary statistical analysis of the test results revealed that the shape of the damage function, modulus of the mix, and slope of relaxation are highly affected by the aging, asphalt binder content, and mix modification.