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Effect of rejuvenator type and dosage on rheological properties of short-term aged binders

机译：综合症型和剂量对短期老化剂流变性质的影响

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摘要

Using reclaimed asphalt pavement (RAP) material in pavement construction is typically an environmentally friendly practice. However, the asphalt available in RAP is already oxidized and stiffened due to various environmental processes. To compensate these problems, rejuvenators can be mixed with aged binder with the aim of restoring its original properties. This study investigates the performance of aged binders blended with three different types of rejuvenators. Thin film oven test aged PG 58–28 binder was mixed with raw waste cooking oil (R1), modified waste cooking oil (R2), and Hydrolene H90T (R3) at the concentrations of 3%, 6% and 9% by the weight of the total binder. To enhance rutting resistance, styrene–butadiene–styrene was also blended with rejuvenated binders and tested. Frequency sweep testing at a wide range of temperatures and frequencies was conducted in the Dynamic Shear Rheometer, and time–temperature superposition was used to obtain parameters including Superpave, Glover-Rowe, Shenoy, Crossover frequency and Rheological index parameters. In addition, the Multi Stress Creep Recovery test was performed to gain an in-depth understanding of the rutting performance of the binders. Based on the comparative study of different rejuvenated binders, the binder rejuvenated using a chemically modified waste cooking oil seems to most be effective in improving the overall performance of the binder without compromising its rutting resistance. In addition, the relationship between different cracking parameters indicated that they are not all compatible with each other in terms of ranking binder performance. Finally, the MSCR parameter seems to more effectively capture the influence of rejuvenation and SBS addition to rejuvenated binders more than other parameters.
机译：在路面结构中使用回收的沥青路面（RAP）材料通常是环保惯例。然而，由于各种环境过程，RAP中可用的沥青已经氧化和加强。为了补偿这些问题，可以将恢复剂与年龄的粘合剂混合，目的是恢复其原始性质。本研究研究了与三种不同类型的再融合器混合的老化粘合剂的性能。将薄膜烘箱试验老化PG 58-28粘合剂与原料废物烹饪油（R1），改性废物烹饪油（R2），水解H90T（R3），浓度为3％，6％和9％的重量总粘合剂。为了增强车辙抗性，苯乙烯 - 丁二烯 - 苯乙烯也与恢复活化的粘合剂混合并测试。在动态剪切流量计中进行频率扫描在宽范围温度和频率下进行，并且使用时间温度叠加来获得包括SuperPave，Glover-Rowe，Shenoy，交叉频率和流变指数参数的参数。此外，进行多重应力蠕变恢复试验以深入了解粘合剂的车辙性能。基于对不同恢复粘合剂的比较研究，使用化学改性废物烹饪油恢复活化件似乎最有效地改善粘合剂的整体性能而不会影响其车辙抗性。此外，不同裂缝参数之间的关系表明它们在排名粘合剂性能方面并不彼此兼容。最后，MSCR参数似乎更有效地捕捉到重新活化和SBS的影响，而不是其他参数的恢复粘合剂。

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