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SHI Xin, WANG Chao-hui, LI Yan-wei, ZHAO Juan-juan, WANG Xuan-cang. Pavement performance analysis of asphalts modified by different types of tourmalines[J]. Journal of Traffic and Transportation Engineering, 2013, 13(2): 17-24. doi: 10.19818/j.cnki.1671-1637.2013.02.003
Citation: SHI Xin, WANG Chao-hui, LI Yan-wei, ZHAO Juan-juan, WANG Xuan-cang. Pavement performance analysis of asphalts modified by different types of tourmalines[J]. Journal of Traffic and Transportation Engineering, 2013, 13(2): 17-24. doi: 10.19818/j.cnki.1671-1637.2013.02.003
shu

Pavement performance analysis of asphalts modified by different types of tourmalines

doi: 10.19818/j.cnki.1671-1637.2013.02.003
  • 1.

    Key Laboratory of Road Structure and Materials of Transportation Industry, Chang'an University, Xi'an 710064, Shaanxi, China

  • 2.

    Transportation Bureau of Shijiazhuang, Shijiazhuang 050051, Hebei, China

More Information
  • Author Bio:

    SHI Xin(1975-), female, doctoral student, +86-29-82334836, pubaby001@163.com

    WANG Xuan-cang(1956-), male, professor, +86-29-82334836, wxc2005@163.com

  • Received Date: 2012-11-22
  • Publish Date: 2013-04-25
    Abstract
  • Two kinds of tourmaline powders and four kinds of tourmaline anion powders were selected to modify asphalt, and the tourmaline modified asphalt was prepared by using a melting-blending method. The penetration, softening point and ductility were tested, and the effect laws of tourmaline types and mixing amount on asphalt temperature sensitivity, high-temperature and low-temperature properties, adhesion property were studied. The effect of tourmaline on asphalt low-temperature property was studied by using improved bending beam rheometer(BBR) test, and the adhesion property between tourmaline modified asphalt and aggregate was evaluated by using water-boiling method. The improved mechanism of tourmaline on asphalt pavement performance was analyzed by using scanning electron microscope(SEM) test, differential scanning calorimetry(DSC) test, piezoelectric test and thermoelectric test. Analysis result shows that the temperature sensitivity of tourmaline powder modified asphalt improves firstly and then reduces with the increase of mixing amount, and that of tourmaline anion powder modified asphalt shows an opposite law. The high-temperature performances of all tourmaline modified asphalts improve with the increase of mixing amount. The pavement performance of tourmaline powder modified asphalt improves significantly with the increase of tourmaline powder mesh, that of tourmaline anion powder modified asphalt reduces unceasingly with the increase of anion release amount.In the same mesh, the effect of tourmaline anion powder on asphalt pavement performance is better than that of tourmaline powder. Tourmaline can well improve the low-temperature property of tourmaline modified asphalt. Tourmaline can disperse in asphalt uniformly and stably, and can form a stable whole. The electric property of tourmaline can be played fully when tourmaline is added into asphalt.So tourmaline can improve the road performance of asphalt significantly.

     

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