Properties investigation of the SBS modified asphalt with a compound warm mix asphalt (WMA) fashion using the chemical additive and foaming procedure

Styrene-butane-styrene (SBS) modified bitumen has been widely applied in pavement engineering due to its excellent cracking and rutting resistance. However, there are workability concerns due to its higher viscosity compared to virgin bitumen. Conventional Warm Mix Asphalt (WMA) technologies including surfactants and foaming additives have been successfully applied to SBS bitumen. This study attempts to evaluate whether compound WMA technologies...