Comparison of rut performance of asphalt concrete and binder containing warm mix additives

In this research, rutting resistance of asphalt concrete and asphalt binders containing different warm mix additives are evaluated at high temperature. Frequency Sweep, Multiple Stress-Creep Recovery (MSCR), and Zero Shear Viscosity (ZSV) tests were conducted on extracted binders using a Dynamic Shear Rheometer device at 50°C temperature to determine binder rut parameters. In this study, five widely used rheological rut parameters are examined: the Superpave® rutting specification parameter, Shenoy parameter, Zero Shear Viscosity, Non-Recoverable Creep Compliance, and Percent Recovery. By employing these specific approaches, the rutting resistance of modified asphalt binders were determined and then normalized to the values of the control sample in order to calculate the rutting resistance improvement ratio. In addition, rheological properties were then correlated with Hamburg Wheel-Tracking Device (HWTD) results performed at 50°C. Results show that the mixture incorporated with Cecabase® additive and polymer modification demonstrated significant enhancement in rutting resistance. Also, based on the tested rheological parameters, it was observed that non-recoverable compliance value obtained from MSCR testing exhibited superior correlation with HWTD (R² = 0.96) compared to the other parameters.

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  • English

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  • Accession Number: 01713770
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 31 2019 3:14PM