Correlation between asphalt chemical indices and fatigue performance and healing of reclaimed asphalt mixture containing waste oil and polymer

Document Type : Research Paper


1 PhD candidate, Department of Civil Engineering, Babol Noshirvani University of Technology

2 Associate professor, Faculty of Engineering, Babol Noshirvani University of Technology



Due to aging, reclaimed asphalt mixtures are composed of more heavy molecular components, reducing molecular mobility and asphalt repair ability. The use of rejuvenating materials that have light molecular components can be effective in improving the fatigue properties and healing of asphalt mixtures. To control the performance of such mixtures at high temperatures, using polymers can effectively prevent the phenomenon of rutting. This research evaluated fatigue behavior and recovery of reclaimed asphalt mixture using waste oil and styrene butadiene styrene polymer.The chromatography method for the chemical analysis and a four-point bending beam (4PBBT) test to investigate the fatigue behavior and heal the asphalt mixture are used. The results of fatigue tests have shown an increase in the fatigue life and healing ability of the asphalt mixtures rejuvenated with oil and polymer, so that the oil and the combination of oil and polymer have increased the fatigue life of the recycled mixture by 6 and 3.5 times, respectively. Correlation analysis between chemical components and fatigue life and healing of asphalt mixtures shows a significant relationship between the healing rate and the values of asphalt chemical indices. In this regard, the correlation of chemical parameters, including the colloidal index Ic, the sum of heavy bitumen molecules, i.e., asphaltene plus resin, as well as the ratio of light components, i.e., the ratio of saturated to aromatics, and also the amount of recovery at


Main Subjects

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