Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (3): 37-40，52.doi: 10.3969/j.issn.1000-565X.2010.03.007

• Traffic & Transportation Engineering • Previous Articles     Next Articles

Analysis of Viscoelastic Properties of Modified Asphalt via Dynamic Mechanical Method

Zhan Xiao-li1.2  Wang Duan-yi 1   

  1. 1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, Guangdong, China; 2. College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China
  • Received:2008-10-24 Revised:2009-03-03 Online:2010-03-25 Published:2010-03-25
  • Contact: 詹小丽（1982-），女，博士后，主要从事道路工程与材料研究． E-mail:zhanxl@seut．edu．cn
  • About author:詹小丽（1982-），女，博士后，主要从事道路工程与材料研究．
  • Supported by:

    国家自然科学基金资助项目（50808087）

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Abstract:

As the existing evaluation index of viscoelastic properties of asphalt is inapplicable to modified asphalt, the viscoelastic properties of both base asphah and modified asphalt are analyzed by using the dynamic mechanical method. In the investigation, the parameters describing the viscoelastic properties at different temperatures and fre- quencies are measured, and the variation laws of both Han curves and dynamic viscoelastic parameters are analyzed. The results indicate that the temperature dependence of Han curves of modified asphalt varies at different temperatures, that there exists a great difference in viscoelasitc properties between base asphalt and modified as- phalt due to the complex morphological structure of modified asphalt, and that the dynamic mechanical analysis is effective in revealing the relativity between the macroscopic mechanical properties and the microstructure of modified asphalt.

Key words: road engineering, modified asphalt, viscoelastic property, dynamic mechanical analysis, Han curve