Recycling of sterol-containing asphalt binder
AssigneesA.L.M. Holding Company, Ergon Asphalt & Emulsions, Inc.
InventorsGerald H. Reinke, Gaylon L. Baumgardner, Andrew Hanz
Life of this patent
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Abstract
Disclosed are asphalt binder compositions and methods for making such compositions with sterol. The sterol improves various rheological and chemical properties of asphalt binder.
Claims15
An upcycled asphalt binder composition comprising
- i) a recycled asphalt comprising reclaimed asphalt pavement (RAP), reclaimed asphalt shingles (RAS), or a combination of both RAP and RAS, the recycled asphalt containing aged asphalt binder and reclaimed sterol,
- ii) virgin asphalt binder, and
- iii) fresh sterol
- wherein the reclaimed sterol and fresh sterol collectively are 2.5 wt. % to 35 wt % of the collective weight of the aged asphalt binder and virgin asphalt binder, and wherein the reclaimed sterol reduces or retards an asphalt binder aging rate of the upcycled asphalt binder composition.
A method of forming an upcycled asphalt binder composition comprising mixing i) a recycled asphalt comprising reclaimed asphalt pavement (RAP), reclaimed asphalt shingles (RAS), or a combination of both RAP and RAS, wherein the recycled asphalt contains aged asphalt binder and reclaimed sterol, (ii) virgin asphalt binder, and iii) fresh sterol to form the upcycled asphalt binder composition, wherein the aged sterol reduces or retards an asphalt binder aging rate of the upcycled asphalt binder composition, and wherein the reclaimed sterol and fresh sterol collectively are 2.5 wt. % to 35 wt % of the collective weight of the aged asphalt binder and virgin asphalt binder.
An upcycled asphalt binder composition comprising i) recycled asphalt comprising reclaimed asphalt pavement (RAP), reclaimed asphalt shingles (RAS), or combinations of both RAP and RAS, the recycled asphalt containing, aged asphalt binder and reclaimed sterol, ii) virgin asphalt binder, and iii) fresh sterol, and wherein the reclaimed sterol and the fresh sterol collectively are 2.5 wt. % to 35 wt. % of collective weight of the aged asphalt binder and virgin asphalt binder, and wherein both the reclaimed sterol and fresh sterol reduce or retard an asphalt binder aging rate of the upcycled asphalt binder composition.
Dependencies are inferred from the claim text.