| 沥青混合料分形级配理论 |
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| 引用本文： | 杨瑞华,许志鸿,张超,李淑明.沥青混合料分形级配理论[J].同济大学学报(自然科学版),2008,36(12). |
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| 作者姓名： | 杨瑞华 许志鸿 张超 李淑明 |
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| 作者单位： | 1. 同济大学,道路与交通工程教育部重点试验室,上海,200092;上海市公路管理处,上海,200063
2. 同济大学,道路与交通工程教育部重点试验室,上海,200092 |
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| 基金项目： | 道路与铁道工程国家重点学科资助项目
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| 摘 要： | 介绍沥青混合料集料粒径分布分形维数的计算方法并分析其分形特征.对于连续级配,其集料粒径分布为一重分形分布;对于间断级配,其集料粒径分布为二重分形分布.采用粗集料粒径分布分形维数Dc和细集料粒径分布分形维数Df作为描述集料级配分形特点的指标.在此基础上,提出分形级配理论的计算式,该式不仅可以计算连续级配,还可以计算间断级配.研究分形级配理论与现有主要级配设计理论之间的关系,结果表明,分形级配理论可以包括现有的几种主要级配计算方法,这主要由于分形是集料级配的本质.
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| 关 键 词： | 道路工程 沥青混合料 级配理论 分形 |
Fractal Gradation Theory of Asphalt Mixture |
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| YANG Ruihu,XU Zhihong,ZHANG Chao,LI Shuming.Fractal Gradation Theory of Asphalt Mixture[J].Journal of Tongji University(Natural Science),2008,36(12). |
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| Authors: | YANG Ruihu XU Zhihong ZHANG Chao LI Shuming |
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| Institution: | YANG Ruihua1,2,XU Zhihong1,ZHANG Chao1,LI Shuming1 |
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| Abstract: | This paper presents an introduction to the approach to the calculation of fractal dimension of grain size distribution and also an analysis of the fractal characteristics of asphalt mixture aggregate.The fractal of dense-graded aggregate is one-dimensional,but the fractal of gap-graded aggregate is two-dimensional.Dc(fractal dimension of coarse aggregate) and Df(dimension of fine aggregate) are used as the indexes to describe the fractal characteristics of asphalt mixture aggregate.Additionally,the fractal gradation theory is put forward,not only used for the design of dense-graded aggregate,but also for gap-graded aggregate.An analysis is made of the relationship between the fractal gradation theory and other gradation theories.The results show that the fractal gradation theory covers the existing gradation methods.The cause lies in the fact that fractal is the essence of aggregate. |
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| Keywords: | road engineering asphalt mixture gradation theory fractal |
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