Journal Published Online: 21 July 2023
Volume 51, Issue 6

Quantitative Evaluation on Fusion Behavior of Rejuvenator and Aged Asphalt Based on Multi-scale Experiments

CODEN: JTEVAB

Abstract

The application of recycled asphalt not only alleviated the accumulation of reclaimed asphalt pavement (RAP) but also reduced the consumption of resources, which had a significant economic and social benefit. However, the utilization of RAP was still a great challenge for the application of recycled asphalt; one of the important reasons for this was the lack of quantitative analysis on the fusion behavior and fusion degree between rejuvenator and aged asphalt. To refine and propose the quantitative evaluation index of the fusion degree of rejuvenator and aged asphalt, the recycled asphalt was prepared in this study using a self-developed rejuvenator, and it was analyzed by various tests. The results showed that the addition of rejuvenator decreased and then increased the viscous activation energy and complex modulus index value, and the fusion degree also exhibited a similar variation trend. The increasing of carbonyl index and sulfoxide index indicated the fusion degree was increased with the incorporation of rejuvenator. Furthermore, the higher the rejuvenator dosage, the faster the wetting speed, and the higher the wetting work, which was more conducive to improving the fusion degree. The average optical density and integrating optical density in the recycled asphalt gradually decreased, and the fusion degree gradually increased. Moreover, the morphological parameter values of recycled asphalt were positive correlation with rejuvenator dosage. Finally, the calculation results of the principal component analysis model and grey relation analysis model found that the wetting work was more suitable for quantitative analysis of fusion behavior than other evaluation indexes. The findings of this research provide a potential guideline for evaluating the performance of recycled asphalt, which may improve the way of using recycled asphalt.

Author Information

Yin, Peng
School of Transportation and Logistics, Dalian University of Technology, Dalian, China
Pan, Baofeng
School of Transportation and Logistics, Dalian University of Technology, Dalian, China
Li, Zihan
School of Transportation and Logistics, Dalian University of Technology, Dalian, China
Pages: 20
Price: $25.00
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Details
Stock #: JTE20230125
ISSN: 0090-3973
DOI: 10.1520/JTE20230125