公称最大粒径是路用混合料筛分试验、路面结构设计和路面材料配比设计中一个极为重要的概念。文章通过对一般颗粒粒径常用几种分类定义和量测方法的讨论,并结合SHRP研究计划对沥青混合料最大粒径的筛分分类定义的分析,在规范定义的基础上,对公称最大粒径概念做了进一步的延拓,使使用者对最大粒径与公称最大粒径有更深刻、更全面、更明晰地理解和认识。 Nominal maximum particle size is road mix test, pavement structure design and pavement material ratio design is a very important concept. Based on the discussion of several classification definitions and measurement methods commonly used in general particle size and the analysis of the screening classification definition of the maximum particle size of asphalt mixture combined with the SHRP research plan, based on the definition of the standard, The concept of diameter has been further extended to enable users to have a deeper, fuller, and clearer understanding and understanding of the maximum and maximum nominal diameters.