Normalization method for asphalt mixture fatigue equation under different loading frequencies

作者：Lu Song-tao; Zheng Jian-long

来源：Journal of Central South University (English Edition), 2015, 22(7): 2761-2767.

DOI：10.1007/s11771-015-2806-1

• road engineering
• asphalt pavement
• fatigue equation
• loading speed
• loading frequency
• strength
• stress ratio

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.

• 出版日期2015-7
• 单位长沙理工大学