US 12,234,189 B2
Sterol blends as an additive in asphalt binder
Gerald H. Reinke, La Crosse, WI (US); Gaylon L. Baumgardner, Arkadelphia, AR (US); and Andrew Hanz, LaCrosse, WI (US)
Assigned to A.L.M. Holding Company, Onalaska, WI (US); and Ergon Asphalt & Emulsions, Inc., Jackson, MS (US)
Filed by A.L.M. Holding Company, Onalaska, WI (US); and Ergon Asphalt & Emulsions, Inc., Jackson, MS (US)
Filed on Apr. 26, 2023, as Appl. No. 18/139,737.
Application 18/139,737 is a continuation of application No. 17/402,261, filed on Aug. 13, 2021, granted, now 11,667,570.
Application 17/402,261 is a continuation of application No. 16/887,978, filed on May 29, 2020, granted, now 11,097,981, issued on Aug. 24, 2021.
Application 16/887,978 is a continuation of application No. 16/323,883, granted, now 10,669,202, issued on Jun. 2, 2020, previously published as PCT/US2017/045887, filed on Aug. 8, 2017.
Claims priority of provisional application 62/372,504, filed on Aug. 9, 2016.
Prior Publication US 2023/0257303 A1, Aug. 17, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C04B 24/00 (2006.01); C04B 18/02 (2006.01); C04B 24/02 (2006.01); C04B 24/08 (2006.01); C04B 24/36 (2006.01); C04B 26/26 (2006.01); C08L 91/00 (2006.01); C08L 95/00 (2006.01); E01C 19/00 (2006.01); E01C 19/02 (2006.01); C04B 111/00 (2006.01); C04B 111/20 (2006.01)
CPC C04B 24/02 (2013.01) [C04B 18/02 (2013.01); C04B 24/08 (2013.01); C04B 24/36 (2013.01); C04B 26/26 (2013.01); C08L 91/00 (2013.01); C08L 95/00 (2013.01); E01C 19/002 (2013.01); E01C 19/02 (2013.01); C04B 2111/0075 (2013.01); C04B 2111/20 (2013.01); C08L 2207/22 (2013.01); C08L 2555/34 (2013.01); C08L 2555/64 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for retarding the aging rate of aged asphalt binder comprising:
adding a sterol blend comprising a mixture of pure sterols and crude sterols to an asphalt binder composition, wherein the asphalt binder composition comprises a virgin asphalt binder and the aged asphalt binder, wherein the aged asphalt binder comprises a reclaimed asphalt binder, wherein the sterol blend comprises about 10-90 wt. % crude sterol and wherein the sterol blend is about 1 wt % to about 10 wt % of the virgin asphalt binder.