应用贝雷法进行级配组成设计的关键技术

通过贝雷法确定不同的粗集料选取密度,形成不同的集料骨架结构,进行集料级配设计。提出了运用3个比例参数CA]比、FAc]比、FAf]比,分析合成级配的方法,使设计的混合料具有较好的抗车辙性能和耐久性。对贝雷法设计混合料级配时需要注意的问题加以讨论。结果表明,控制筛孔的选择非常重要,它对粗集料比影响大;选择密度是控制沥青混合料骨架形成的关键指标,粗细集料比对混合料的施工和体积特性有影响。

Key technologies of aggregate blending by Bailey method

Bailey design method for aggregate gradation is to select different coarse aggregate chosen-unit-weight to form different aggregate skeleton structure, it also suggests using three ratios, CA] Ratio, FA_c] Ratio and FA_f] Ratio, to analyze composite gradation. Thus the designed mixture has good rutting resistance and endurance. The key technologies about this design method were studied. The results show that the choice of control sieve is very important, and the control sieve has a significant effect on coarse aggregate ratio. The chosen-unit-weight is a key indictor of aggregate skeleton structure evaluation. The coarse and fine ratio have some effects on construction and volume properties of asphalt mixture.