Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (3): 41-46.doi: 10.3969/j.issn.1000-565X.2010.03.008

• Traffic & Transportation Engineering • Previous Articles     Next Articles

Method to Test Dynamic Modulus of Asphalt Mixture Based on Semi-Circular Specimens

Liu Yu1.2  Zhang Xiao-ning1  Chen Shao-xing 3   

  1. 1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, Guangdong, China; 2. Test Center of Guangdong Communication Group, Guangzhou 510420, Guangdong, China; 3. School of Civil Engineering and Architecture, Central South University, Changsha 410075, Hunan, China
  • Received:2009-03-09 Revised:2009-05-18 Online:2010-03-25 Published:2010-03-25
  • Contact: 张肖宁（1951-），男，教授，博士生导师，主要从事道路工程研究．E-mail：prozxn@163．com E-mail:hitrain@163．com
  • About author:刘字（1976-），男，博士，主要从事道路工程研究．
  • Supported by:

    国家自然基金资助项目（50878090）;西部交通建设科技项目（2007440003080610）

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Abstract:

As the dynamic uniaxial compression modulus is difficult to use in testing pavement core, the evaluation method based on the design modulus is inapplicable to the compliance examination of pavement quality. In order to solve this problem, a test method for dynamic modulus was proposed based on semi-circular bending specimens, and the corresponding test parameters were determined. Then, the proposed method was used to test the dynamic modulus of common pavement asphalt mixture. The results show that the stress coefficient obtained via the three-di- mension finite element method is of high precision, and that the precision of the tested dynamic modulus is high enough. Moreover, it is found from the variation coefficient of the test data that the proposed method is of good sta- bility due to its weak dispersion and small repeatability deviation.

Key words: asphalt mixture, dynamic modulus, compliance examination, semi-circular specimen, phase angle, variability