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Zhang Zheng-qi, Li Ning-li, Chen Hua-xin. Determining method of mixing and compaction temperatures for modified asphalt mixture[J]. Journal of Traffic and Transportation Engineering, 2007, 7(2): 36-40.
Citation: Zhang Zheng-qi, Li Ning-li, Chen Hua-xin. Determining method of mixing and compaction temperatures for modified asphalt mixture[J]. Journal of Traffic and Transportation Engineering, 2007, 7(2): 36-40.
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Determining method of mixing and compaction temperatures for modified asphalt mixture

  • 1.

    Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, Shaanxi, China

  • 2.

    School of Matericals Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, China

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  • Author Bio:

    Zhang Zheng-qi(1967-), male, professor, +86-29-82335306, z_zhengqi@126.com

  • Received Date: 2006-12-02
  • Publish Date: 2007-04-25
    Abstract
  • In order to reasonably determine the mixing and compaction temperatures of modified asphalt mixture, gyratory compaction test was conducted on several modified asphalt mixtures, their volume parameters were analyzed, an optimal compaction temperature was obtained based on the compaction effect, and according to the relationship among the viscosity with the temperature and shear rate for mixture at the optimal compaction effect, a shear rate of 60 s-1 was proposed to measure the viscosity of modified asphalt.Aimed at the shear rate, the viscosities at different temperatures and the viscosity-temperature curves could be got, and the mixing and compaction temperatures were determined with the viscosity request of(0.17±0.02) Pa·s and(0.28±0.03) Pa·s respectively.The difference between the compaction temperature obtained by the commended method and the temperature at the optimal compaction effect is 5 ℃, the temperature obtained by the commended method is in accordance with paving practice, which indicates that the commended method is reasonable.

     

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    • References(10)
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