Coating system for asphalt and related methods
AssigneeAsphalt Systems, Inc.
InventorsJoseph LaRusso, Bradley Richard Grose
Life of this patent
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Abstract
A coating system and related methods for an airfield surface or a roadway is described. The coating system may include a stable cationic emulsion for application to the airfield surface or the roadway. The stable cationic emulsion may include a) an asphalt blend comprising gilsonite, wherein the gilsonite is modified to possess a positive charge, b) one or more polymers, and c) one or more surfactants not including a cationic surfactant. The coating system may also include a fine aggregate material for application to the stable cationic emulsion applied to the airfield surface or the roadway.
Claims15
A method of manufacturing a stable cationic asphalt emulsion, comprising:
- blending an asphalt cement with gilsonite to form an asphalt blend;
- preparing an aqueous solution comprising water, a modifier, and one or more surfactants, wherein none of the one or more surfactants is a cationic surfactant;
- combining the asphalt blend with the aqueous solution to form a stable cationic emulsion, wherein a positive charge is imparted on at least a portion of the gilsonite;
- and
- adding one or more polymers to either the aqueous solution or the stable cationic emulsion.
A method for applying a coating system to a surface, comprising:
- spraying a stable cationic emulsion onto a surface, the stable cationic emulsion having:
- a) an asphalt blend comprising gilsonite, wherein at least a portion of the gilsonite is modified to possess a positive charge;
- b) one or more polymers, and
- c) one or more surfactants, wherein none of the one or more surfactants is a cationic surfactant;
- and
- applying an aggregate at a rate of at least 1.0 lbs per square yard onto the stable cationic emulsion applied to the surface.
Dependencies are inferred from the claim text.