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采用单轴压缩蠕变试验研究了多种纤维沥青混合料的粘弹特性,并采用伯格斯流变模型对其粘弹特性进行评价。研究结果表明,纤维改性剂的使用能减小蠕变试验中沥青混合料加载过程的总变形量和卸载完成后的永久变形;伯格斯模型适宜于评价纤维沥青混合料的粘弹特性,纤维掺入后的主要作用表现为改善沥青混合料粘弹性能中的迟滞粘弹性和粘性性能。
The viscoelastic properties of various fiber asphalt mixtures were investigated by uniaxial compressive creep tests. The viscoelastic properties of the samples were evaluated by using the Burgess rheological model. The results show that the use of fiber modifier can reduce the total deformation of the asphalt mixture in the creep test and the permanent deformation after unloading; Burgers model is suitable for evaluating the viscoelastic properties of the fiber asphalt mixture, The main role of fibers after incorporation is to improve the hysteretic viscoelasticity and viscous properties of viscoelastic properties of asphalt mixtures.