华南理工大学学报(自然科学版) ›› 2012, Vol. 40 ›› Issue (11): 121-126,154.

• 交通与运输工程 • 上一篇    下一篇

基于集料接触特性的沥青混合料抗车辙性能评价

王端宜1 黎侃1,2  蔡旭1   

  1. 1.华南理工大学 土木与交通学院,广东 广州 510640; 2.广东省交通运输厅,广东 广州 510101
  • 收稿日期:2012-02-29 修回日期:2012-09-08 出版日期:2012-11-25 发布日期:2012-10-01
  • 通信作者: 王端宜(1960-) ,男,教授,主要从事道路工程研究. E-mail:tcdywang@scut.edu.cn
  • 作者简介:王端宜(1960-) ,男,教授,主要从事道路工程研究.
  • 基金资助:

    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)

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

Wang Duan-yiLi 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)

摘要: 基于数字图像技术对沥青混合料的粗集料接触点数与集料倾角进行了分析,采用沥青路面分析仪评价了添加不同沥青的AC-13F、AC-13C 与SMA-13 混合料的抗车辙性能,并以粗集料初始接触点数以及沥青软化点为变量建立了车辙深度预估模型,定义了用于级配选择的混合料最佳接触点数以及最小接触点数.结果表明: 混合料的高温稳定性可以采用粗集料接触数量以及倾角变化量进行评价,沥青性能主要影响接触点与倾角的变化量; 将接触点数量引入混合料的设计中作为级配选择的参考,可提高沥青混合料的抗车辙性能.

关键词: 道路工程, 沥青混合料, 路面性能, 车辙, 数字图像技术, 接触点

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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