Journal of South China University of Technology (Natural Science Edition) ›› 2013, Vol. 41 ›› Issue (2): 88-93.doi: 10.3969/j.issn.1000-565X.2013.02.014

• Traffic & Transportation Engineering • Previous Articles     Next Articles

Microscopic Structure Evaluation of Aggregates Based on Laser Measurement and Vacuum Coating Technology

Li Zhi1 Liu Tao1 Liu Chun-lei2   

  1. 1.School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China;2.School of Mechanics and Engineering Science,Zhengzhou University,Zhengzhou 450001, Henan,China
  • Received:2012-08-15 Revised:2012-09-25 Online:2013-02-25 Published:2013-01-05
  • Contact: 李智(1971-)，男，博士，副教授，主要从事道路工程材料设计与评价研究． E-mail:lizhi@scut.edu.cn
  • About author:李智(1971-)，男，博士，副教授，主要从事道路工程材料设计与评价研究．
  • Supported by:

    国家自然科学基金重点项目(51038004)；广东省交通厅重点工程项目(2009-01-003)；华南理工大学中央高校基本科研业务费专项资金资助项目(2009ZM0099)

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Abstract:

The microscopic structure of aggregates is of crucial importance to the skid resistance of asphalt pavement.In this paper,the microscopic structures of four kinds of aggregated rocks with different materials were evaluated by using a serf-developed high-accuracy laser-texture instrument,and the aggregate texture curve was quantitatively evaluated with the box-counting dimension method.Then, the vacuum coating technique was adopted to eliminatethe effects of aggregate lithology,surface color and microscopic crystal and to improve the measurement accuracv of fractal dimension.The results show that the box-counting dimension method can effectively describe the micro-rexture of different aggregates，and that the vacuum coating technique can remarkably improve the measurement accuIlacv.

Key words: asphalt pavement, aggregate, microscopic structure, fractal dimension, vacuum coating

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