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Volume 27 Issue 6
Dec.  2014
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Article Contents
Journal of Southwest Jiaotong University  > 2014  >  27(6): 1102-1107.
SUN Yanna, LI Lihan, WANG Yukai. Evaluation Parameter Research of Asphalt Binder Fatigue[J]. Journal of Southwest Jiaotong University, 2014, 27(6): 1102-1107. doi: 10.3969/j.issn.0258-2724.2014.06.025
Citation: SUN Yanna, LI Lihan, WANG Yukai. Evaluation Parameter Research of Asphalt Binder Fatigue[J]. Journal of Southwest Jiaotong University, 2014, 27(6): 1102-1107. doi: 10.3969/j.issn.0258-2724.2014.06.025
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Evaluation Parameter Research of Asphalt Binder Fatigue

doi: 10.3969/j.issn.0258-2724.2014.06.025
  • Received Date: 10 May 2013
  • Publish Date: 25 Dec 2014
    Abstract
  • In order to determine the evaluation parameter of asphalt binder fatigue performance, fatigue performances of 5 kinds of asphalt binder (including olefin asphalt binder, natural asphalt binder, hard asphalt binder, A70# asphalt, and SBS asphalt)and asphalt mixture were tested in laboratory. Then, 4 evaluation parameters, including fatigue life at 50% initial modulus reduction (Nf50 ), fatigue life at the accumulated dissipation energy ratio deviating 20% from the lossless line (Np20 ), accumulated dissipation energy, and fatigue factor (G*sin δ) were used to analyze the dependence of each evaluation parameter on the loading mode and the relationship between the evaluation parameters. The result shows that the fatigue factor G*sinδ, dissipation energy, and accumulated dissipation energy are inappropriate to be used as evaluation parameters as they cannot determine the fatigue life exactly. The other two parameters, Nf50 and Np20 , however, are suitable to evaluate the binders fatigue performance. Np20 is about 0.725 times Nf50, and it is suggested using Nf50 to evaluate the fatigue performance of asphalt binders.

     

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