Warm mix asphalt binder compositions containing lubricating additives
AssigneeA.L.M. Holding Company
InventorsGerald H. Reinke, Gaylon L. Baumgardner, Steven L. Engber
Life of this patent
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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.
Claims40
An asphalt paving composition comprising i) functionally dry, essentially water-free, non-foamed asphalt binder containing;
- ii) lubricating non-surfactant additive comprising Fischer-Tropsch or Montan wax in an amount less than 1.5 wt. % of the functionally dry, essentially water-free, non-foamed asphalt binder weight, mixed with iii) uncompacted aggregate to provide aggregate coated with binder and lubricating additive suitable for use as a warm mix paving composition;
- wherein the warm mix paving composition is produced at a warm mix temperature which is at least 30° F. lower than a comparison production temperature needed to produce a comparison paving composition containing binder-coated aggregate without the lubricating additive.
An asphalt paving composition comprising i) functionally dry, essentially water-free, non-foamed asphalt binder containing;
- ii) lubricating wax in an amount less than 1.0 wt. % of the functionally dry, essentially water-free, non-foamed asphalt binder weight mixed with;
- iii) uncompacted aggregate to provide aggregate coated with binder and lubricating additive suitable for use as a warm mix paving composition;
- wherein the warm mix paving composition is produced at a warm mix temperature which is at least 30° F. lower than a comparison production temperature needed to produce a comparison paving composition containing binder-coated aggregate without the lubricating additive.
A method of making a warm mix paving composition comprising the steps of:
- (a) adding a lubricating wax in an amount less than 1.0 wt. % to an asphalt binder composition, and
- (b) mixing the asphalt binder composition with aggregate to coat the aggregate and produce a functionally dry, essentially water-free, non-foamed warm mix paving composition at a warm mix temperature which is at least 30° F. lower than a comparison production temperature needed to produce a comparison paving composition containing binder-coated aggregate without the lubricating additive.
A method of making bituminous paving comprising the steps of:
- (a) adding a lubricating wax in an amount less than 1.0 wt. % to an asphalt binder composition,
- (b) mixing the asphalt binder composition with aggregate at a temperature of 260° F. or lower to coat the aggregate and produce a functionally dry, essentially water-free, non-foamed warm mix paving composition at a warm mix temperature which is at least 30° F. lower than a comparison production temperature needed to produce a comparison paving composition containing binder-coated aggregate without the lubricating additive,
- (c) applying the heated paving material to a surface to be paved to provide an applied paving material, and
- (d) compacting the applied paving material at a temperature of 260° F. or lower to form a paved surface.
Dependencies are inferred from the claim text.