1) Sasobit - special wax well blending in the bitumen and gives double effect:
a) reduce bitumen viscosity in it's temperature regime above 110 deg. C - it is why Sasobit is widely in use for production of Warm asphalt mixes (WMA).
b) strengthens the bitumen and makes asphalt mix (asphalt layer) more rutting resistance when the temperature of asphalt layer gets down, below 70 deg. C.
The best results can be achieved when adding 2-3% of Sasobit into the bitumen and mixing it with slow mixers or circulation pumps.
Sasobit is very good to use in production of SBS modified bitumen, because it allows to increase SBS content and keeps PmB viscosity lower plus gives extra mechanical strength to the mix.