Stable emulsions for producing polymer modified asphalt
AssigneeA.L.M. Holding Company
InventorsGaylon L. Baumgardner, Gerald H. Reinke
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Abstract
An acid modified asphalt binder is combined with an emulsifier solution to produce an emulsified asphalt binder. The acid modified asphalt binder may be formed by combining an asphalt binder, a phosphorous-based acid, and, optionally, a polymer modifier. The emulsifier solution may be produced by forming an aqueous solution of an amine and a phosphorous-based acid, which forms an aqueous solution comprising an amine phosphate. The emulsified asphalt binder may be combined with an aggregate to form a paving material. In other examples, the emulsified asphalt binder may be used alone, for example in a chip seal application, or in a diluted form, for example in a fog seal application.
Claims20
A method of forming an emulsified asphalt binder material comprising:
- forming a base asphalt binder by combining an asphalt binder and polyphosphoric acid or superphosphoric acid, mixing an amine compound and a phosphorous-based acid in water to form an emulsifier solution including an amine phosphate, and mixing the base asphalt binder and the emulsifier solution to form the emulsified asphalt binder material;
- or
- adding an amine compound to an asphalt binder to form an amine treated asphalt binder, contacting the amine treated asphalt binder with a mixture of phosphorous-based acid and water required to react with the amine compound in high shear dispersion equipment to form an amine phosphate in situ as the asphalt binder is sheared into fine particles and the amine phosphate and asphalt binder form the emulsified asphalt binder material.
A road pavement made by combining an acid modified asphalt binder with an emulsifier solution comprising an amine phosphate to form an asphalt emulsion, combining the asphalt emulsion with an aggregate material to form a paving material, and applying the paving material.
Dependencies are inferred from the claim text.