为了研究沥青混合料在宽频范围内的动态粘弹性能,采用AR-2000型动态剪切流变仪对不同空隙率沥青混合料进行动态频率扫描,得到了复数剪切模量和相位角等粘弹参数。根据时温等效原理,得到了复数剪切模量、相位角随频率变化的主曲线,同时分析了频率、沥青种类、温度和空隙率对沥青混合料粘弹性能的影响;基于主曲线采用CAM模型拟合分析了不同空隙率沥青混合料试件的粘弹性能。结果表明:频率与温度对不同空隙率沥青混合料粘弹性能的影响规律相同;沥青混合料相位角主曲线在中高温时欠光滑;沥青混合料粘弹性能对空隙率有较强的依赖性;应用CAM模型可以较好地分析不同空隙率沥青混合料的粘弹性能,为沥青混合料设计和性能评价提供参考。 In order to study the dynamic viscoelastic properties of asphalt mixture in a wide range of frequency, AR-2000 dynamic shear rheometer was used to dynamic frequency sweep the asphalt mixture with different porosity, and the viscosities of complex shear modulus and phase angle were obtained Play parameters. According to the principle of time-temperature equivalence, the main curves of complex shear modulus and phase angle with frequency are obtained, and the influences of frequency, type of asphalt, temperature and voidage on the viscoelastic properties of asphalt mixture are analyzed. CAM model fitting analysis of viscoelastic properties of different porosity asphalt mixture specimens. The results show that the influence of frequency and temperature on the viscoelastic properties of asphalt mixtures with different porosity is the same. The main phase curve of asphalt mixture is not smooth at medium and high temperature. The viscoelastic properties of asphalt mixture have a strong dependence on the porosity The application of CAM model can well analyze the viscoelastic properties of different void fraction asphalt mixtures and provide references for the design and performance evaluation of asphalt mixture.