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基于美国Indiana等州试验路中Superpave混合料的材料参数和路面摩擦性能测试数据,该文主要分析公称最大粒径、级配曲线与限制区、关键控制筛孔通过率、粉胶比、细集料棱角性和砂当量对4.75、9.5和12.5mm等Superpave混合料摩擦性能的影响规律。结果表明:公称最大粒径的增大和关键筛孔通过率的减小都能增大Superpave混合料的摩擦性能;级配曲线通过级配限制区下方的混合料的摩擦性能大于级配曲线通过级配限制区和级配限制区上方的混合料摩擦性能;选择细集料棱角性较大和砂当量较低的级配也有助于提高混合料的摩擦性能;而粉胶比与混合料的摩擦性能关系不明显。
Based on the test data of material parameters and pavement friction properties of Superpave mixture in the state pilot road of Indiana in the United States, this paper mainly analyzes the maximum and minimum particle size distribution, grading curve and restricted area, key control mesh passing rate, The angularity and the sand equivalent of the 4.75, 9.5 and 12.5mm Superpave mixture friction properties of the law. The results show that the increase of the nominal maximum particle size and the decrease of the critical mesh passing rate can all increase the friction performance of the Superpave mixture; the friction performance of the mixture below the grading limit zone is greater than that of the gradation curve The frictional properties of the mixture above the confinement zone and the grading confinement zone; the selection of the gradation with the greater angularity of the fine aggregate and the lower sand equivalent also helps to improve the frictional properties of the mixture; and the frictional ratio of the powdery binder to the mixture The relationship is not obvious.