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采用动态剪切流变仪AR-2000对不同TLA掺量的改性沥青在线粘弹范围内进行了动态频率扫描,运用DMA时温等效原理,获得了不同TLA掺量的改性沥青在各个温度下的动态剪切模量主曲线族,结果表明:基于时温等效原理获得的材料宽温宽频范围内的主曲线族频率范围跨跃大,为准确描述不同TLA掺量的改性沥青动态剪切模量的变化趋势提供了条件;TLA改性沥青的动态剪切模量在相同温度下随频率的变化趋势与TLA掺量有关,在双对数坐标下,随TLA掺量的增加,动态剪切模量随频率的变化率逐渐减小,对频率的依赖性越来越好。
Dynamic shear rheometer AR-2000 was used to scan dynamic viscoelasticity of modified asphalt with different amount of TLA on-line in the range of viscoelasticity. By using DMA time-temperature equivalence principle, modified TL with different content of TLA Temperature of the dynamic shear modulus main curve family, the results show that: based on the time-temperature equivalent principle wide range of temperature broadband materials within the main curve frequency range span large, accurate description of different TLA content of modified asphalt The trend of the dynamic shear modulus of TLA modified asphalt with frequency is the same with the TLA content at the same temperature. Under the double logarithmic coordinates, with the increase of TLA content, , The dynamic shear modulus decreases gradually with the frequency, and the dependence on frequency is getting better and better.