东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (11): 1645-1649.DOI: 10.12068/j.issn.1005-3026.2016.11.026

• 资源与土木工程 • 上一篇    下一篇

室内成型的沥青混合料粗集料排布的研究

郭辉, 赵永利, 周健   

  1. (东南大学 交通学院, 江苏 南京210096)
  • 收稿日期:2015-07-22 修回日期:2015-07-22 出版日期:2016-11-15 发布日期:2016-11-18
  • 通讯作者: 郭辉
  • 作者简介:郭辉(1982-),男,山东泰安人,东南大学博士研究生; 赵永利(1971-),男,黑龙江齐齐哈尔人,东南大学教授.
  • 基金资助:
    国家自然科学基金资助项目(51378123).

Study of Coarse Aggregate Configuration of Asphalt Mixture in Laboratory

GUO Hui, ZHAO Yong-li, ZHOU Jian   

  1. School of Transportation, Southeast University, Nanjing 210096, China.
  • Received:2015-07-22 Revised:2015-07-22 Online:2016-11-15 Published:2016-11-18
  • Contact: GUO Hui
  • About author:-
  • Supported by:
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摘要: 为了定量地评价粗集料排布在室内沥青混合料成型过程中的变化规律,利用数字图像处理技术,提出一种评价沥青混合料粗集料排布的合成质心矩方法.选取常用AC20,SMA20型沥青混合料,以控制两种混合料旋转压实次数为条件制成成型试件,横向切割获取截面采集图像进行参数提取.分别计算二维累计筛余粗集料和二维分计筛余粗集料的合成质心矩.结果表明两种不同类型的沥青混合料粗集料合成质心矩随压实次数增加发生不同的变化,SMA20压实60次排布性已达到较好水平.

关键词: 沥青混合料, 排布性, 图像处理, 合成质心矩, 压实

Abstract: In order to quantitatively evaluate the variation of the coarse aggregate alignment in the pitch mixture molding indoors, the digital image processing technology is used to propose a synthetic centroid moment method. The commonly used AC20 and SMA20 pitch mixtures are selected to define the number of rotations and compactions as test specimens of conditional molding for the two types of mixtures. Parameters are extracted through horizontal segmentation of the collected images. The synthetic centroid moments of the 2-D accumulate residual coarse aggregate and the 2-D non-accumulate residual coarse aggregate are computed, respectively. Results show that the synthetic centroid moments vary differently with the number of compactions for the two types of pitch mixture and coarse aggregate. The configuration of SMA20 is excellent after 60 compactions.

Key words: asphalt mixture, configuration, image process, synthesis of center of mass, crush

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