中文摘要：

为了定量评价超大粒径沥青混合料（SLSM）的级配特性，运用分形理论提出了SLSM集料质量分形分布函数的计算方法，得到了不同级配SLSM-40的质量分形维数，建立了集料质量分布与分形维数的关联模型，分析了分形维数与SLSM-40体积指标的关系，并通过强度试验和简单性能试验研究了SLSM-40的力学指标。分析结果表明：分形维数在2．60左右时，SLSM-40的体积指标均符合技术要求；分形维数在2．55～2．60之间时，SLSM-40的级配均匀性良好；随着粒径增大，粘聚力增大，SLSM-40中粘聚力对整体强度贡献率约为50％，比普通沥青混合料提高了1～2倍，而内摩擦角减小5°～10°；20℃试验条件下，SLSM-40抗压回弹模量比AC-25提高了1869mPa，为AC-25的2．6倍；不同试验温度条件下，随着加载频率的增大，SLSM-40的动态模量逐渐增大，相位角随温度和加载频率的变化规律与动态模量相比差异较大，并且温度越高，动态模量指标越小，SLSM-40的抗永久变形能力下降。

英文摘要：

In order to quantificationally evaluate the gradation characteristic of super large stone asphalt mixture （SLSM）, a method was put forward to calculate the aggregate mass fractal distribution function of SLSM based on fractal theory. The values of mass fractal dimension were obtained for SLSM-40 with different gradations, and a relational model between aggregate mass distribution and fractal dimension was established. The relationship between fractal dimension and the volume indexes of SLSM-40 was analyzed, and the mechanical indexes of SLSM-40 were studied by using strength test and simple performance test. Analysis result shows that all the volume indexes of SLSM-40 satisfy technical requirements when fractal dimension is about 2.60.SLSM-40 has good gradation homogeneity when fractal dimension is 2.55-2.60. Cohesion increases with the increase of particle size, and the contribution rate of SLSM-40 cohesion to overall strength is about 50G, which increases by 1-2 times compared with ordinary asphalt mixture, and internal friction angles reduce by 5°-10°. The compression rebound modulus of SLSM-40 increases by 1 869 MPa at 20 ℃, which is 2.6 times compared with AC-25. The dynamic modulus of SLSM-40 increases with the increase of loading frequency at different temperatures, and the change law of phase angle has larger difference compared with that of dynamic modulus at different temperature decreases with the increase of temperature, SLSM-40 declines. 9 tabs, 1 fig, 16 refs.