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浙江大学学报(工学版)
J4  2012, Vol. 46 Issue (2): 263-268    DOI: 10.3785/j.issn.1008-973X.2012.02.013
土木工程     
Delaunay三角网格的沥青混合料粗集料分布特性
王新飞1, 黄志义1, 刘卓1, 朱兴一2, 徐伟1
1.浙江大学 建筑工程学院,浙江 杭州 3100582.上海大学 上海市应用数学和力学研究所,上海 200072
Analysis of distribution properties of coarse aggregates in HMA
based on delaunay triangulation
WANG Xin-fei1, HUANG Zhi-yi1, LIU Zhuo1, ZHU Xing-yi2, XU-Wei1
1. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China;
2. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China
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摘要：

为研究沥青混合料的细微观结构特征,提出粗集料分布特性的量化方法和指标.基于数字图像处理技术对粒径大于2.36 mm的沥青混合料粗集料质心进行delaunay三角剖分,建立三角单元内A1/A2（集料-胶浆面积比）参数表征细观结构局域特征,通过对A1/A2统计特性的描述、分析以及概率形式的统计推断,得到粗集料整体分布特性的量化与分析结果.研究表明,不同级配之间粗集料的总量及级配各档位质量分布的差异性将显著影响细观结构特征,如沥青玛蹄脂碎石混合料（SMA）、开级配抗滑磨耗层混合料（OGFC）和高性能路面沥青混合料（SUP） 3种级配粗集料的平均紧密程度呈递减趋势.此外,给出A1/A2参数的集中趋势指标和偏态指标,并在此基础上提出非参数检验方法对沥青混合料细观结构进行对比,评判多种级配细观结构的嵌挤紧密特征的异同,认为SMA和OGFC的细观嵌挤特征类似,而SUP和SMA以及OGFC相比细观结构更趋于分散.
Abstract:

To investigate the microstructure of asphalt concrete, a new method was proposed to analyze the distribution properties of coarse aggregates. Based on the digital image processing and computational geometry, delaunay triangulation method was used to generate the centroid of the coarse aggregates which square sieve size larger than 2.36mm. Then, coarse aggregateasphalt bind area ratio (A1/A2) for each delaunay triangle was calculated by statistics theory. The A1/A2 varies with different gradations, therefore, it can be used to represent the local character of the hot mixture asphalt ( HMA ) microstructure . According to the statistic analysis, it indicates that the total mass and each graded mass of the coarse aggregates both significantly influence the microstructural character of HMA. The central tendency and skewness of A1/A2 is helpful to judge the dense degree of the coarse aggregate skeleton, and the nonparametric tests can further provide the possibility of classifying the microstructure of the HMA. By comparing three different gradations, such as stone matrix asphalt(SMA), open graded friction course(OGFC), and superpave(SUP), it shows SMA has the largest dense degree of coarse aggregates distribution, and SUP appears the least dense degree characteristic. Furthermore, SMA and OGFC have similar type of microstructure while SUP’s type is different from others.
出版日期: 2012-03-20
:  U 414  
基金资助:

国家自然科学基金青年基金资助项目（11102104）；交通运输部科技资助项目（201131880670）.
通讯作者: 黄志义，男，教授，博导，     E-mail: hzy@zju.edu.cn
作者简介: 王新飞(1986—)，男，硕士生，从事沥青路面细观力学研究，E-mail:wangxinfei@qq.com
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引用本文:

王新飞, 黄志义, 刘卓, 朱兴一, 徐伟. Delaunay三角网格的沥青混合料粗集料分布特性[J]. J4, 2012, 46(2): 263-268.

WANG Xin-fei, HUANG Zhi-yi, LIU Zhuo, ZHU Xing-yi, XU-Wei. Analysis of distribution properties of coarse aggregates in HMA
based on delaunay triangulation. J4, 2012, 46(2): 263-268.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2012.02.013    或    http://www.zjujournals.com/eng/CN/Y2012/V46/I2/263

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