Abstract: By studying the maximum density curve theory,particle interfering theory and different grading calculus,the varying i method and calculating formula were put forward to grading design.Then the ranges of i were presented to AC-16,SMA-16 and Sup-12.5 according to contrast aggregate gradations from varying i method with AC-16,SMA-16, Sup-12.5 and skeleton dense structure gradation designed on particle interfering theory.Furthermore,it was verified by applying the varying i method to the grading des

Key words: varying i method, maximum density curve theory, particle interfering theory, grading design, asphalt mixture

摘要： 在对最大密度曲线理论和粒子干涉理论及相关级配算法研究的基础上，提出了变i法及相应算法。通过变i 法计算的集料级配与规范中Ac一16、SMA一16、Sup一12。5级配和以粒子干涉理论为依据设计的多级嵌挤密实结构 级配的比较，给出了满足Ac一16、SMA一16和Sup一12。5级配的相应i值范围，并结合工程实例对变法在AC一16 型沥青混合料设计中的应用进行了检验。结果显示，利用该方法设计的级配，较好的满足了设计要求。同时也说明 变法能较好的适应我国沥青混合料级配采用方孔筛的划分标准及不同沥青混合料类型的级配设计要求

关键词: 变法, 最大密度曲线理论, 粒子干涉理论, 级配设计, 沥青混合料：15416．217, TU528．4