The interactions between the rubber particles and the SBS copolymer change the morphology of the asphalt binder. When properly blended, the rubber particles swell, absorbing the lighter components of the bitumen, which increases the viscosity of the mastic.
SBS is a well-known elastomeric polymer used to improve the elasticity, viscosity, and temperature susceptibility of asphalt binders. However, the integration of Crumb Rubber (CR)—derived from recycled tires—into SBS-modified asphalt is a crucial approach to improving sustainability. This combined modification (CR/SBS) offers a synergic effect, where the elasticity of SBS and the filling/reinforcing properties of the crumb rubber improve the pavement's resistance to permanent deformation and fatigue cracking. Key Findings in Binder Investigation 124048
) at high service temperatures, indicating improved resistance to rutting. Impact on Asphalt Mixtures The interactions between the rubber particles and the