矿料级配设计理论的研究现状与发展趋势

简述了以Fuller最大密度曲线理论为基础发展起来的n法、I法、变I法、k法、变k法、折断级配算法等级配算法的优缺点和以粒子干涉理论为基础发展起来的间断级配算法的优缺点。阐述了不同排列方式下颗粒堆积特性与填充特性,说明了集料密排方式的非单一性。同时根据高等级路面对沥青混合料路用性能的要求,指出了多级嵌挤骨架型沥青混合料的矿料级配设计是沥青混合料矿料级配设计理论的发展趋势,指出了矿料级配设计从实践到理论的发展,对沥青路面结构材料的发展具有重要的意义。

Current Status and Future Trends of Aggregate Grading Design Theory

The advantages and disadvantages of several aggregate grading design methods based on the theory of maximum density curve(n-way,I-way,changed I-way,k-way,and changed k-way and gap-gradation way) are discussed in this paper;moreover,the method of step-gradation which are based upon the theory of granule interference are also analyzed.The piling and filling characteristics of aggregate under different arrangement patterns are presented,which proves the compact arrangement patterns of aggregate are not single.According to the road-related performance of asphalt mixture for pavement of high-grade highway,multilevel stone-stone frame design is recognized the future trend of the aggregate grading design theory.It will be a break through for asphalt pavement structure materials that the development of aggregate design is from application to theory.