Laboratory Evaluation of the Effect of Waste Rubber Powder and Recycled Polyethylene Waste Powder on the Performance Properties of Bitumen and Asphalt Mixture with an Environmental Approach

The implementation of polymer modification on bitumen performance at low temperature is significantly compromised by the breakdown of styrene-butadiene rubber (SBR) polymer during bitumen mixing operations. The effectiveness of using waste edible oil/Sasobit (Sasobit/WCO) as a hot additive mixture has been demonstrated in reducing the adverse effects of thermal aging on bitumen modified with Stysene Butadiene Rubber Bitumen (SB) while maintaining the initial performance of the bitumen. However, few studies have been conducted to further investigate the rheological properties and aging resistance of SB bitumen modified with Sasobit/WCO blends. In this research, three additives - Sasobit, WCO, and Sasobit/WCO composite - were selected on the physical and rheological properties of SB, and they were investigated and also evaluated in those mixtures prepared. In addition, using dynamic shear rheometers (DSR) and bending beam rheometers (BBR), this warm mixture was evaluated on performance grade (PG) and aging resistance SB. According to the results, Sasobit/WCO composites perform better than Sasobit and WCO in reducing the preparation volume. Sasobit/WCO also improves the performance of SB in high and low simultaneously. Compared to hot asphalt mixtures, the addition of Sasobit/WCO reduces the preparation of bitumen mixtures by 19 °C, which contributes to the lowest negative aging temperature on SB performance. In addition, the addition of Sasobit/WCO composite can improve the SB mixture against thermal cracking. After the introduction of Sasobit/WCO, the high PG of SB increased by two grades regardless of whether the effect of warm mixing was taken into account. With the addition of Sasobit/WCO, the acceptability of SB against short-term aging increased.