Effect of S/B block proportion on the phase behavior and rheology of SBS modified bitumen

The phase behaviors of bitumen modified by SBS with different S/B block proportion were investigated by microscopy and rheology. It was found that even when the SBS additions into bitumen were the same, phase separation structure and rheological properties still exhibited a large difference due to the different S/B proportion, which resulted in a different ability of the absorption for light components from bitumen.