gap-graded meaning in English

粗糙分级的
间断级配的
间隔分级的

Based on the chang - yu highway in julin province , this paper focus on gap - graded asphalt mixtures . aggregate grading of the gap - graded hma was designed by means of void design procedure . this paper give out a kind of new gradation of stone matrix asphalt . at the same time , this paper also studies the effect of aggregate size on road - related performance in some different gradings
本文以吉林省长余高速公路为依托，从沥青混合料的结构形态入手，利用体积法，对骨架密实型级配类型的沥青混合料的级配进行研究，提出新型的沥青马蹄脂级配，并针对不同级配的沥青马蹄脂碎石混合料，全面分析了粗，细集料的粒径变化对其各种路用性能的影响。