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分形几何理论在沥青混合料集料级配研究中的应用

发表时间:2009-05-31  浏览量:1670  下载量:788
全部作者: 蒋双全,张争奇
作者单位: 长安大学特殊地区公路工程教育部重点实验室
摘 要: 介绍了分形几何理论,根据分形几何理论建立了沥青混合料级配集料分布与分维数D的关系,给出了集料级配分维值的计算方法。通过分析分维值对级配压实特性的影响,认为分维数是级配的表征,不同分维数级配的压实过程以及压实耗能也不一样,但其压实曲线变化趋势一致。介绍了采用分维值定量预测评价沥青混合料抗车辙性能和均匀性的方法。试验表明:分维值和沥青混合料的抗车辙性能及均匀性有良好的相关性。大量研究表明:采用分形几何理论研究沥青混合料微细观结构与路用性能的关系是一种合理且有效的方法。
关 键 词: 道路工程;沥青混合料;集料级配;分形几何;压实特性;车辙;均匀性
Title: The application of fractal geometry theory in the research of aggregate gradation of asphalt mixture
Author: JIANG Shuangquan, ZHANG Zhengqi
Organization: Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University
Abstract: This paper introduced the fractal geometry theory, and established the relations of the asphalt mixture aggregate gradation distribution and the fractal dimension values D according to the fractal geometry theory. A method of calculating the fractal dimension values of asphalt mixture aggregate gradation was proposed. In addition, the paper analyzed the influence of fractal dimension values on the compaction characteristics, and indicated that the fractal dimension values was the representation of gradation, the gradations with different fractal dimension values had different compaction process and energy dissipation, but the trend of compaction curve was consilient. The paper proposed the approach which using the fractal dimension values to quantitatively predict and evaluate anti-rutting performance and uniformity of asphalt mixture. The experiment indicated that the fractal dimension values had good relevance to the anti-rutting performance and uniformity of asphalt mixture. The massive researches indicated that the method which using fractal geometry theory to study the relationship between the micro-structure and pavement performance of asphalt mixture is reasonable and effective.
Key words: road engineering; asphalt mixture; aggregate gradation; fractal geometry; compaction characteristics; rutting; uniformity
发表期数: 2009年5月第10期
引用格式: 蒋双全,张争奇. 分形几何理论在沥青混合料集料级配研究中的应用[J]. 中国科技论文在线精品论文,2009,2(10):1095-1102.
 
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