Journal of South China University of Technology(Natural Science Edition) ›› 2012, Vol. 40 ›› Issue (11): 121-126,154.

• Traffic & Transportation Engineering • Previous Articles     Next Articles

Evaluation of Rutting Resistance of Asphalt Mixture Based on Aggregate Contact Characteristics

Wang Duan-yi1  Li Kan1,2  Cai Xu1   

  1. 1. School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China; 2. Guangdong Provincial Transportation Department,Guangzhou 510101,Guangdong,China
  • Received:2012-02-29 Revised:2012-09-08 Online:2012-11-25 Published:2012-10-01
  • Contact: 王端宜(1960-) ，男，教授，主要从事道路工程研究． E-mail:tcdywang@scut.edu.cn
  • About author:王端宜(1960-) ，男，教授，主要从事道路工程研究．
  • Supported by:

    国家自然科学基金资助项目( 51278203) ; 广东省交通运输厅科技项目( 2011-02-014)

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Abstract:

In this paper,first,the number of contact points and the inclination of coarse aggregates were analyzed by means of the digital image technology. Next,the rutting resistance of asphalt mixtures AC-13F,AC-13C and SMA-13 added with different kinds of asphalts was evaluated by using an asphalt pavement analyzer. Then,an evaluation model of rut depth was established,with the number of initial contact points of the coarse aggregates and the softening point of asphalt as the variables. Finally,the optimal and the minimum numbers of contact points were respectively determined for the gradation selection. The results indicate that the high-temperature stability of asphalt mixtures can be evaluated with the initial amount of contact points and the variation of inclination,that the performance of asphalt mainly influences the variations of the contact points and the inclination,and that the introduction of contact point number in the mixture design as a reference for gradation selection helps to improve the rutting resistance of asphalt mixtures.

Key words: road engineering, asphalt mixture, pavement performance, rutting, digital image technology, contact point

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