Granted Patent
B2
US 12,234,189 · App. 18/139,737 · Granted Feb 25, 2025
Sterol blends as an additive in asphalt binder
Inventors:
Gerald H. Reinke (La Crosse, WI); Gaylon L. Baumgardner (Arkadelphia, AR); Andrew Hanz (LaCrosse, WI)
C04B24/02C04B18/02C04B24/08C04B24/36C04B26/26C08L91/00C08L95/00E01C19/002E01C19/02C04B2111/0075C04B2111/20C08L2207/22C08L2555/34C08L2555/64
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Abstract
Disclosed are asphalt binder compositions and methods for making such compositions with pure sterol:crude sterol blends. The sterol blends improve various rheological properties.
Claims (21)
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.
2. The method of claim 1 , wherein the crude sterol comprises a bio-derived source or a distilled residue of the bio-derived source.
3. The method of claim 1 , wherein the sterol blend comprises a tall oil pitch.
4. The method of claim 1 , wherein the sterol blend comprises soybean oil or corn oil.
5. The method of claim 1 , wherein the sterol blend comprises a sterol ester.
6. The method of claim 1 , wherein the sterol blend is free of sterol esters.
7. The method of claim 1 , wherein the sterol blend comprises 0.5 to about 1 to about 10 wt % of the virgin asphalt binder.
8. The method of claim 1 , further comprising mixing aggregate with the asphalt binder composition.
9. The method of claim 1 , wherein the reclaimed asphalt binder comprises a reclaimed asphalt pavement.
10. The method of claim 1 , wherein the reclaimed asphalt binder comprises reclaimed asphalt shingles.
11. The method of claim 1 , wherein the sterol blend retards the aging rate of the asphalt binder composition compared to a similarly aged asphalt binder composition that does not include the sterol blend.
12. An asphalt pavement comprising aggregate, an asphalt binder composition comprising i) a virgin asphalt binder and ii) an aged asphalt binder comprising reclaimed asphalt pavement and/or reclaimed asphalt shingles, wherein the asphalt binder composition further contains a sterol blend comprising pure sterol and crude sterol, and wherein the sterol blend is about 1 wt % to about 10 wt % wt % of the virgin asphalt binder.
13. The asphalt pavement of claim 12 , wherein the sterol blend comprises a 10:90 to 90:10 weight ratio of pure sterol to crude sterol.
14. The asphalt pavement of claim 12 , wherein the crude sterol comprises a bio-derived source or distilled residue of the bio-derived source.
15. The asphalt pavement of claim 12 wherein the crude sterol comprises a tall oil pitch.
16. The asphalt pavement of claim 12 , wherein the crude sterol comprises soybean oil.
17. The asphalt pavement of claim 12 , wherein the crude sterol comprises corn oil.
18. The asphalt pavement of claim 12 , wherein the aged asphalt binder comprises reclaimed asphalt pavement.
19. The asphalt pavement of claim 12 , wherein the aged asphalt binder comprises reclaimed asphalt shingles.
20. The asphalt pavement of claim 12 , wherein the asphalt pavement is compacted.
Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Apr 26, 2023
From: REINKE, GERALD H.; BAUMGARDNER, GAYLON L.; HANZ, ANDREW
To: A.L.M. HOLDING COMPANY; ERGON ASPHALT & EMULSIONS, INC.
Reel/Frame 063451/0924 →
Continuity (5)
Continuation
16323883
Provisional Application
62372504
· Aug 9, 2016
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