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US 7,981,466 B2Granted
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
Estimating the term…
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.
Claims26
A method of making bituminous paving comprising the steps of:
- (a) mixing a non-foamed asphalt binder composition and lubricating additive selected from the group consisting of a lubricating surfactant, lubricating acid, viscosity modifier, dispersant viscosity modifier, additive containing viscosity modifier or dispersant modifier, extrusion and molding production processing aid, polyolefin, sulfur and combinations thereof, with aggregate at a temperature of 280° F. or lower, to coat the aggregate and produce a heated paving material at a warm mix temperature at least 30-100° F. lower than a comparison production temperature needed to produce a comparison paving composition containing binder-coated aggregate without the lubricating additive;
- (b) applying the heated paving material to a surface to be paved to provide an applied paving material, and
- (c) compacting the applied paving material at a temperature of 260° F. or lower to form a paved surface.
A method of making a warm mix paving composition comprising the steps of:
- (a) adding a lubricating additive selected from the group consisting of a lubricating surfactant, lubricating acid, viscosity modifier, dispersant viscosity modifier, additive containing viscosity modifier or dispersant viscosity modifier, extrusion and molding production processing aid, polyolefin, sulfur and combinations thereof, 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 and 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 forming a paved surface comprising the steps of:
- (a) mixing aggregate with a functionally dry, essentially water-free, non-foamed asphalt binder composition comprising an asphalt binder and a lubricating additive selected from the group consisting of a lubricating surfactant, a lubricating acid, viscosity modifier, dispersant viscosity modifier, additive containing viscosity modifier or dispersant viscosity modifier, extrusion and molding production processing aid, polyolefin, sulfur and combinations thereof to coat the aggregate and produce a warm mix paving composition at a warm mix temperature at least 30-100° F. lower than a comparison production temperature needed to produce a comparison paving composition containing binder-coated aggregate without the lubricating additive;
- (b) supplying the warm mix paving composition to a paving machine at a site to be paved;
- (c) applying the warm mix paving composition to the site to be paved;
- and
- (d) compacting the applied warm mix paving composition to form a paved surface.
2 more elements
A paving process comprising:
- (a) adding a lubricating substance consisting of an antistripping agent to a non-foamed asphalt binder heated to within a warm mix temperature range to create a warm mix lubricated asphalt binder composition;
- (b) combining the warm mix lubricated asphalt binder composition with a suitable aggregate;
- (c) mixing to coat the aggregate with the lubricated asphalt binder composition to form a warm mix paving material;
- (d) transferring the warm mix paving material to a paving machine;
- (e) applying the warm mix paving material with the paving machine to a prepared surface at a warm mix paving temperature;
- and then
- (f) compacting the applied paving material to form a paved surface.
4 more elements
Dependencies are inferred from the claim text.