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PENG Yu-hua, HU Jia-yin, HU Shun-feng. Influence of AC-25 particle size distribution on gradation segregation[J]. Journal of Traffic and Transportation Engineering, 2014, 14(5): 1-7.
Citation: PENG Yu-hua, HU Jia-yin, HU Shun-feng. Influence of AC-25 particle size distribution on gradation segregation[J]. Journal of Traffic and Transportation Engineering, 2014, 14(5): 1-7.
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Influence of AC-25 particle size distribution on gradation segregation

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

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  • Author Bio:

    PENG Yurhua(1973-), male, professor, PhD, +86-29-82334453, pyh@chd.edu.cn

  • Received Date: 2014-07-21
  • Publish Date: 2014-10-25
    Abstract
  • Seven kinds of asphalt mixtures with typical gradations were produced by adjusting the scale of hot bunker of mixing plant in AC-25 gradation range.By Bailey method, AC-25 aggregate was divided into five gradation intervals such as 0-0.3, 0.3-1.18, 1.18-4.75, 4.75-13.2 and 13.2-31.5 mm.The grey relation degree of aggregate content and gradation segregation in each interval was calculated by gray relation method.Analysis result shows that the grey relation degree reflects the influence of aggregate content on gradation segregation in AC-25 gradation range very well.The relation degrees decrease in the order of 4.75-13.2, 0.3-1.18, 0-0.3, 1.18-4.75 and 13.2-31.5 mm.The relation degree is maximal in 4.75-13.2 mm, which illustrates that the variation of aggregate content in the interval has great effect on the final gradation variability of pavement, so a good segregation resistance gradation is obtained by adjusting the aggregate content.The relation degrees are smaller in 1.18-4.75 and 13.2-31.5 mm, which shows that coarse aggregate and the coarse part of fine aggregate have less influence on gradation segregation.The quadratic regression relation coefficient of aggregate content and gradation segregation in each interval is more than 0.6, which shows that the interaction amongaggregates has great influence on final gradation segregation, the segregation characteristic of aggregate gradation possibly weakens when the influence of single passing rate on the performance of asphalt mixture is considered only, so the segregation resistance performance of asphalt mixture gradation must be analyzed from different grain sizes'combination angle.

     

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