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为了研究纤维的加入对沥青混合料动态模量的影响,采用SPT简单性能试验机测试普通AC13沥青混合料及加入聚酯纤维的AC13沥青混合料在3种不同温度及10种不同频率下的动态模量值,根据时温等效原理,利用Origin 8软件的非线性曲线拟合功能,拟合出这两种沥青混合料的动态模量主曲线sigmoidal模型,从而得出纤维的加入对沥青混合料动态模量的影响,并将分析对象外延至纤维的加入对沥青混合料高低温路用性能的影响。试验结果表明,在较低温度(5℃)时,纤维的加入使得沥青混合料的动态模量降低;在较高温度(45℃)时,纤维的加入使得沥青混合料的动态模量提高。
In order to study the effect of fiber addition on the dynamic modulus of asphalt mixture, SPT simple performance testing machine was used to test the dynamic modulus of AC13 asphalt mixture and AC13 asphalt mixture added with polyester fiber at three different temperatures and ten different frequencies According to the time-temperature equivalence principle, the sigmoidal model of the dynamic modulus main curve of the two asphalt mixtures was fitted by using the nonlinear curve fitting function of Origin 8 software. The results showed that the addition of fiber to the asphalt mixture Dynamic modulus of the impact of the object of analysis and extension of the fiber to join the high and low temperature asphalt pavement performance. The experimental results show that the dynamic modulus of asphalt mixture decreases with the addition of fibers at lower temperature (5 ℃), and the dynamic modulus of asphalt mixture increases with the addition of fibers at higher temperature (45 ℃).