ABSTRACT
Crumb rubber asphalt with good stability, thus named as stable crumb rubber asphalt, was produced in plant based on wet process. Both conventional performance test and Superpave performance test were conducted to evaluate the performance characteristics of the stable crumb rubber asphalt. Based on Marshall mix design, SMA mixtures with stable crumb rubber asphalt and SBS modified asphalt were designed for performance evaluation. The results show that, SMA with stable crumb rubber asphalt has better high-temperature performance and similar low-temperature performance and moisture stability as compared to SMA with SBS modified asphalt. The SMA with stable crumb rubber asphalt shows better fatigue life at low strain condition and similar fatigue life at high stain condition as compared to SMA with SBS modified asphalt. The findings in this study indicate that the stable crumb rubber asphalt provides a promising replacement for SBS modified asphalt used for SMA.
