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Abstract
This study investigated the relationship between chemical and physical or rheological properties of asphalt binders during aging. Two types of base asphalt binders and their SBS modified asphalt binders were chosen. Results show that carbonyl index (IC=O) or sulfoxide index (IS=O) for base asphalt binders has the higher correlation coefficient square (R2) with rheological properties than physical properties, while 0.5(IC=O+butadiene index (IC=C)) for SBS modified asphalt binders with viscosity shows the highest R2 compared with other physical and rheological indicators. Moreover, IC=O and 0.5(IC=O+IC=C) as chemical indicators are recommended to evaluate aging of base and SBS modified asphalt binders, respectively.
Additional information
Funding
This study was funded by The Open Fund of Key Laboratory of Changsha University of Science & Technology (No. 18KDO4) and The Science and Technology Project of Department of Transportation of Hunan Province of China (No. 201307).