Abstract Activated rubber powder (ARP) was grafted into polystyrene (PS) by in-situ polymerization to obtain PS-ARP which was used as a modifier to prepared styrene–butadienestyrene (SBS) modified asphalt. Three indicators,… Click to show full abstract
Abstract Activated rubber powder (ARP) was grafted into polystyrene (PS) by in-situ polymerization to obtain PS-ARP which was used as a modifier to prepared styrene–butadienestyrene (SBS) modified asphalt. Three indicators, dynamic shear rheology (DSR), multi-stress creep recovery (MSCR), time scan, bending beam rheology (BBR) and segregation tests results showed that PS-ARP can improve low temperature plasticity, heat resistance, viscoelasticity, anti-rutting, fatigue and low temperature performance of modified asphalt. The addition of 3-PS-ARP improved the ductility of SBS modified asphalt from 13.03 cm to 23.1 cm (5 °C) while fatigue and anti-rutting performance were enhanced about 85.53% (30 °C) and 97.28% (82 °C), respectively. FT-IR and SEM analyses showed successful synthesis of PS-ARP. FM analyses confirmed that large number of PS microspheres were encapsulated on the surface of PS-ARP resulting in a composite network structure with SBS in asphalt.
Journal Title: Construction and Building Materials
Year Published: 2020
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