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Study on rheological properties of EVA modified asphalt based on fractional derivative theory

机译：基于分数衍生理论的EVA改性沥青流变性研究

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Based on the fractional derivative theory, the relation between fractional derivative operator and power function empirical creep equation has been established. And the physical meaning of the power function parameters has been clarified. Ethylene-vinyl acetate (EVA) has been used as additives to prepare modified asphalt with content of EVA modifier varying from 0% to 9% in increments of 3% by weight of asphalt. Dynamic frequency sweep tests have been conducted on EVA modified asphalt using dynamic shear rheometer at 30 degrees C, 40 degrees C, 50 degrees C, and 60 degrees C. The complex shear modulus and the rutting factor of the asphalt modified by EVA increase with the increase of EVA content and decrease with the increase of temperature. The results indicate that the EVA modified asphalt reduced thermal sensitivity and increased resistance to permanent at high temperatures. Also, the power function parameters of EVA modified asphalt have been studied and analysed based on fractional derivative theory.
机译：基于分数衍生理论，建立了分数衍生算子与功率函数经验蠕变方程的关系。并且澄清了功率函数参数的物理含义。乙烯 - 乙酸乙烯酯（EVA）已被用作添加剂，以制备改性沥青的EVA改性剂含量从0％达到0％至9％以3重量％的沥青的增量。在EVA改性沥青仪上使用动态剪切流量计进行动态频率扫描测试，在30摄氏度，40℃，50℃和60℃下进行动态剪切流量计。复杂的剪切模量和通过EVA改变的沥青的车辙因子随着时间的增加随着温度的增加，EVA含量的增加和降低。结果表明，EVA改性沥青在高温下降低了热敏灵敏度和对永久性的抗性。此外，已经研究了EVA改性沥青的功率功能参数，并基于分数衍生理论分析。

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