Abstract
Performance properties of polymer modified asphalt (PMA) binders with Styrene-isoprene-styrene (SIS), petroleum resin (PE), and ground tire rubber (GTR) were evaluated at high, intermediate, and low temperatures. Styrene-butadiene-styrene (SBS) PMA binder of PG 76-22 was used as a base binder. The PG76 SBS PMA binders were blended with SIS, PE, and three different GTR contents (0, 5, and 10%). The binders were artificially short-term and long-term aged using rolling thin film oven (RTFO) and pressure aging vessel (PAV) procedures. Superpave binder tests were conducted on the binders through rotational viscometer (RV), dynamic shear rheometer (DSR), and bending beam rheometer (BBR). Multiple stress creep recovery (MSCR) test was also performed to evaluate the rutting property. The results of this study indicated that (1) the addition of PE can decrease the binder viscosity, (2) although the incorporation of GTR and SIS significantly improve the rutting resistance of the binders, the effect of PE is found to be insignificant, (3) PE is observed to have positive effect on the cracking properties of control PG76 SBS PMA binder blended with SIS and GTR, and (4) incorporation of PE might be an useful option to improve the workability of high performance PMA binder in lieu with maintaining good rutting and cracking resistance.
Highlights
SBS is the most common polymer which is used to produce high quality polymer modified asphalt (PMA) binder [2]
SBS modified binder is known to be durable pavement material which has improved bonding strength with aggregate based on a three-dimensional network [3]. e formation of network improves rutting resistance and cracking resistance at low temperature by microdamage accumulation [4]. erefore, the SBS modified asphalt binder is mostly used for the construction of highway that are exposed to high traffic volume and heavy loads
E viscosity values were not measured at standard testing temperature (135°C), due to the high viscosity characteristics associated with the addition of SIS. us, viscosity results measured at 180°C exhibited to have better comparisons and trends
Summary
3.244 1.9 3.3 3650 285 0.302 nonrecoverable creep compliance (Jnr) and percent recovery (%rec) for quantifying the rutting susceptibility of asphalt binders. e nonrecoverable creep compliance (Jnr), which is determined by dividing nonrecoverable shear strain by the shear stress, is used to evaluate the rutting potential of the asphalt binder. 3.244 1.9 3.3 3650 285 0.302 nonrecoverable creep compliance (Jnr) and percent recovery (%rec) for quantifying the rutting susceptibility of asphalt binders. E nonrecoverable creep compliance (Jnr), which is determined by dividing nonrecoverable shear strain by the shear stress, is used to evaluate the rutting potential of the asphalt binder. A statistical analysis was performed using the Statistical Analysis System (SAS) program to conduct an analysis of variance (ANOVA) and Fisher’s Least Significant Difference (LSD) comparison with α 0.05. E ANOVA was performed first to determine whether significant differences among sample population means were declared to be statistically different [26] A statistical analysis was performed using the Statistical Analysis System (SAS) program to conduct an analysis of variance (ANOVA) and Fisher’s Least Significant Difference (LSD) comparison with α 0.05. e ANOVA was performed first to determine whether significant differences among sample population means were declared to be statistically different [26]
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