Patent ID: 11912874
Assignee: A.L.M. HOLDING COMPANY
Field: Pharmaceuticals (Chemistry)
Classification: CPC C  A  E  G | IPC C  E  G

Claim 0:
1. A method for slowing the aging rate of aged asphalt binder in a paved surface comprising:
adding a crude sterol comprising at least 13.5 wt. % sterol molecules to an asphalt binder composition, wherein the asphalt binder composition comprises 60 wt. % to about 95 wt. % of a virgin asphalt binder, from about 5 wt. % to about 40 wt. % reclaimed asphalt binder material obtained from aged pavement comprising asphalt pavement (RAP) at binder replacement levels 20% and greater, asphalt shingles (RAS) at a binder replacement level 1% and greater or combinations of both and from 0.5 to 15 wt. % of the crude sterol based on the virgin asphalt binder,
combining the asphalt binder composition with aggregate to provide paving mix, and
applying the paving mix on a base surface to provide the paved surface with slower aging rate.