Laboratory Evaluation of Asphalt Binders Containing Styrene-Butadiene-Styrene (SBS) and Processed Oil

The study presents an experimental evaluation to improve the resistivity of binders with Styrene-Butadiene-Styrene (SBS) and Processed oil by studying the physical properties, rheology, and cracking. For this experiment, PG 64-22 was mixed with SBS at different percentages of 5%, 10%, and 15% by weight of the original binder with two processed oil contents of 6% and 12% by weight of the binder. Laboratory tests have been conducted at various high, medium, and low temperature ranges to evaluate their properties. The processed oil polymer modified asphalt (PMA) binder is artificially aged in both the short and long-term using a Rolling Thin Film Oven (RTFO) and a Pressure Aging Vessel (PAV). The Superpave testing method was performed on modified binders using a Rotational Viscometer (RV), Dynamic Shear Rheometer (DSR), and Bending Beam Rheometer (BBR). The results of this study illustrate (1) The addition of SBS leads to higher viscosity, but the co-modification of asphalt binder with the processed oil shows a significant modulation of the viscosity value. (2) In addition, processed oil reduced the resistance to rutting, but the addition of SBS significantly improved the rutting resistance of the asphalt binder. (3) The addition of SBS and processed oil improved the value of G sin delta, notably. (4) According to BBR, it has been shown that the addition of SBS in addition to the processed oil improves the stiffness values of modified asphalt binders.

Automated summary

This study presents an experimental evaluation of improving binder resistivity by using Styrene-Butadiene-Styrene (SBS) and processed oil. The physical properties, rheology, and cracking were studied. The results showed that the addition of SBS increased viscosity, but the co-modification of asphalt binder with processed oil significantly modulated the viscosity value. Processed oil reduced rutting resistance, but the addition of SBS improved it. The addition of SBS and processed oil also improved the value of G sin delta, as well as the stiffness values of modified asphalt binders according to BBR.