Abstract
In order to analyze the effect of different loading frequencies on the fatigue performance for asphalt mixture, the changing law of asphalt mixture strengths with loading speed was revealed by strength tests under different loading speeds. Fatigue equations of asphalt mixtures based on the nominal stress ratio and real stress ratio were established using fatigue tests under different loading frequencies. It was revealed that the strength of the asphalt mixture is affected by the loading speed greatly. It was also discovered that the fatigue equation based on the nominal stress ratio will change with the change of the fatigue loading speed. There is no uniqueness. But the fatigue equation based on the real stress ratio doesn’t change with the loading frequency. It has the uniqueness. The results indicate the fatigue equation based on the real stress ratio can realize the normalization of the asphalt mixture fatigue equation under different loading frequencies. It can greatly benefit the analysis of the fatigue characteristics under different vehicle speeds for asphalt pavement.
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Foundation item: Projects(51208066,51038002) supported by the National Natural Science Foundation of China; Project(20114316120001) supported by Specialized Research Fund for the Doctoral Program of Higher Education, China; Project(2012-319-825-150) supported by Application and Basic Research Projects of Ministry of Transport, China; Project(2013K28) supported by Transportation Science and Technology Plan Projects of Henan Province, China; Project(201102) supported by Transportation Science and Technology Plan Projects of Hunan Province, China; Project(YB2012B031) supported by Funding Projects of Hunan Provincial Outstanding Doctorate Dissertation, China; Project(2014gxjgclkf-002) supported by Open Fund of Key Laboratory of Road Structure and Material of Guangxi Province China; Project(kfj120101) supported by Open Fund of the Key Laboratory of Highway Engineering (Changsha University of Science and Technology), China
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Lü, St., Zheng, Jl. Normalization method for asphalt mixture fatigue equation under different loading frequencies. J. Cent. South Univ. 22, 2761–2767 (2015). https://doi.org/10.1007/s11771-015-2806-1
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DOI: https://doi.org/10.1007/s11771-015-2806-1