Granted Patent
B2
US 12,258,475 · App. 16/267,830 · Granted Mar 25, 2025
Warm mix asphalt binder compositions containing lubricating additives
Inventors:
Gerald H. Reinke (La Crosse, WI); Gaylon L. Baumgardner (Arkadelphia, AR); Steven L. Engber (Onalaska, WI)
C08L95/00C04B26/26C08K5/0008C09D195/00E01C7/265E01C19/08E01C19/10C04B2111/0075C08K5/17C08K5/521C08L2555/24C08L2555/34C08L2555/40C08L2555/60C08L2555/72C08L2555/80Y02A30/30Y02W30/91
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Abstract
The present invention provides a functionally dry warm mix asphalt binder composition modified with lubricating agents or additives that can be mixed with aggregate and compacted at temperatures substantially below asphalt binder compositions that do not contain the disclosed lubricating additives.
Claims (19)
1. An asphalt paving composition comprising an aggregate and a functionally dry, warm mix asphalt binder composition coating the aggregate, said functionally dry, warm mix asphalt binder composition comprising an asphalt binder, an antistrip additive, and one or more lubricating additives selected from a lubricating surfactant, a lubricating non-surfactant, a lubricating acid or combination thereof.
2. The asphalt paving composition according to claim 1 , wherein the antistrip additive comprises a surfactant.
3. The asphalt paving composition according to claim 1 , wherein the antistrip additive provides improved moisture resistance to the asphalt paving composition.
4. The asphalt paving composition according to claim 1 , wherein the antistrip additive comprises a compound selected from a cationic surfactant, a phosphate ester, an amine, a polyamine, and a combination thereof.
5. The asphalt paving composition according to claim 1 , wherein the asphalt paving composition is a warm mix asphalt paving composition at a temperature of 280° F. or lower and wherein the aggregate is uncompacted.
6. The asphalt paving composition according to claim 1 , wherein the aggregate comprises reclaimed asphalt pavement (RAP), wherein the antistrip additive comprises a polyamine, wherein the one or more lubricating additives comprise an ethoxylated tallow diamine, and wherein the asphalt paving composition is produced by a method comprising mixing the asphalt binder composition and the aggregate at a temperature of 220-240° F.
7. The asphalt paving composition according to claim 1 , wherein the aggregate comprises reclaimed asphalt pavement (RAP), wherein the antistrip additive comprises a polyamine, wherein the one or more lubricating additives comprise an ethoxylated tallow diamine, and wherein the asphalt paving composition can be adequately compacted at a temperature of 205-225° F.
8. The asphalt paving composition according to claim 1 , wherein the asphalt paving composition when paved and compacted at a warm mix temperature has a compacted density 91% or higher compared to a maximum theoretical density.
9. The asphalt paving composition according to claim 1 , wherein the presence of the one or more lubricating additives allows the asphalt binder composition to adequately coat the aggregate at a warm mix temperature that is 30-50° F. lower than the temperature needed for the asphalt binder on its own to adequately coat the aggregate without the one or more lubricating additives and the antistrip additive.
10. The asphalt paving composition according to claim 1 , wherein the lubricating additive is about 0.1-1.0 weight percent of the asphalt binder composition based on the weight of the asphalt binder composition.
11. The asphalt paving composition according to claim 1 , wherein the asphalt binder comprises an asphalt binder selected from a polymer-modified asphalt binder, an acid-modified asphalt binder, or a polymer- and acid-modified asphalt binder.
12. The asphalt paving composition according to claim 1 , wherein the aggregate comprises reclaimed asphalt pavement (RAP).
13. The asphalt paving composition according to claim 1 , wherein the functionally dry, warm mix asphalt binder composition has a measured maximum normal force no more than about 5.5 Newtons at 90° C. using a dynamic shear rheometer with a 50 μm gap.
14. The asphalt paving composition according to claim 1 , wherein the asphalt paving composition contains less than 5 weight percent water based on the weight of the asphalt paving composition.
15. The asphalt paving composition according to claim 1 , wherein the one or more lubricating additives comprise ethoxylated tallow diamine.
16. The asphalt paving composition of claim 1 , wherein the one or more lubricating additives comprise a lubricating non-surfactant, and wherein the lubricating non-surfactant comprises a wax.
17. The asphalt paving composition of claim 1 , wherein the one or more lubricating additives comprises a lubricating acid, and wherein the lubricating acid is polyphosphoric acid.
18. The asphalt paving composition according to claim 1 , wherein the asphalt paving composition is produced by a method comprising mixing the asphalt binder composition and the aggregate at a warm mix temperature.
19. The asphalt paving composition according to claim 1 , wherein the asphalt paving composition is produced by a method comprising adequately coating the aggregate with the asphalt binder composition at a warm mix temperature, wherein the adequate coating would require a temperature at least 30° F. higher in the absence of the one or more lubricating additives.
Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Feb 5, 2019
From: REINKE, GERALD H.; BAUMGARDNER, GAYLON L.; ENGBER, STEVEN L.
To: ALM HOLDING CO.
Reel/Frame 048241/0236 →
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Feb 5, 2019
From: ALM HOLDING COMPANY
To: ALM HOLDING COMPANY; ERGON ASPHALT & EMULSIONS, INC.
Reel/Frame 048241/0478 →
Continuity (11)
Provisional Application
60976141
· Sep 28, 2007
Provisional Application
60970809
· Sep 7, 2007
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