Journal of South China University of Technology (Natural Science Edition) ›› 2008, Vol. 36 ›› Issue (6): 56-61.

• Traffic & Transportation Engineering • Previous Articles     Next Articles

Prediction of Indirect Tensile Fatigue Life of Asphalt Mixture by Means of Viscoelastic Theory

Huang Xiao-ming1  Zhang Jiu-peng1  Liu Wei-min2   

  1. 1. School of Transportation, Southeast University, Nanjing 210096, Jiangsu, China; 2. Shanghai Municipal Engineering Design General Institute, Shanghai 200092, China
  • Received:2007-06-07 Revised:2007-09-06 Online:2008-06-25 Published:2008-06-25
  • Contact: 黄晓明（1963-），男，教授，博士生导师，主要从事道路工程材料与结构研究． E-mail:huangxm@seu．edu．cn
  • About author:黄晓明（1963-），男，教授，博士生导师，主要从事道路工程材料与结构研究．
  • Supported by:

    国家“863”计划项目（2006AA11Z110）

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Abstract:

On the basis of the viscoelastic theory and by substituting the pseudo strain for the actual strain, a criterion of indirect tensile fatigue of asphalt mixture is established and a prediction model of the fatigue life is deduced. Then, the model is used to determine the parameters including the creep compliance, the slope value, the relaxation modulus and the pseudo strain, and to predict the fatigue life of AC13 asphalt mixtures with the stress ratios of 0. 1 and 0. 15. Moreover, the prediction model is modified via indirect tensile fatigue tests. The results indicate that, as compared with the traditional testing methodS, the proposed model can predict the indirect tensile fatigue life of asphalt mixture more accurately with small discrete value, simple testing procedure and short testing time. A recommended correction coefficient of the proposed model is finally presented as 0. 713 - 0. 757.

Key words: asphalt mixture, fatigue life, indirect tensile test, viscoelasticity, pseudo strain