Generally, the dynamic modulus and bending stiffness modulus are used to evaluate the mechanical properties of asphalt mixture, and they are also used as basic parameters for asphalt mixture design. Therefore, a study was conducted on changes in the dynamic modulus and bending stiffness modulus of hot-recycled asphalt mixture with high levels of reclaimed asphalt pavement (RAP) under the influence of different factors: dosage of regenerant, curing temperature, and curing time. The performance of reclaimed asphalt pavement (RAP) was first evaluated. Then, the hot-recycled asphalt mixture was adjusted and designed in order to conduct modulus experiments, composed of the dynamic modulus test and three-point bending test. Finally, the influencing factors were not only qualitatively but also quantitatively analyzed to clarify the change laws of the mechanical parameters of hot-recycled asphalt mixture. The results showed that the modulus of the recycled asphalt mixture first decreased, then increased, and then decreased with increasing dosage of regenerant. As the curing time or temperature increased, the modulus first decreased and then increased. In terms of the dynamic modulus of the hot-recycled asphalt mixture, the curing time had the greatest impact, followed by dosage of the regenerant and curing temperature. For bending stiffness modulus, the influence of dosage of the regenerant was the greatest, followed by curing time and curing temperature. For the bending stiffness modulus of hot-recycled asphalt mixture, the curing conditions had a greater influence compared with the dynamic modulus.

中文翻译：

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高RAP热再生沥青混合料模量影响因素分析

一般用动态模量和弯曲刚度模量来评价沥青混合料的力学性能，也作为沥青混合料设计的基本参数。为此，研究了再生剂用量、养护温度、养护时间等不同因素影响下高掺量再生沥青路面（RAP）热再生沥青混合料的动模量和弯曲刚度模量的变化。首先评估了再生沥青路面（RAP）的性能。然后，对热再生沥青混合料进行调整设计，进行模量试验，包括动态模量试验和三点弯曲试验。最后，对影响因素进行定性和定量分析，明确热再生沥青混合料力学参数的变化规律。结果表明，随着再生剂掺量的增加，再生沥青混合料的模量先减小，后增大，再减小。随着固化时间或温度的增加，模量先减小后增大。就热再生沥青混合料的动态模量而言，养护时间影响最大​​，其次是再生剂用量和养护温度。对于弯曲刚度模量，再生剂用量的影响最大，其次是固化时间和固化温度。对于热再生沥青混合料的弯曲刚度模量，与动态模量相比，养护条件的影响更大。