Recycled oil- and rubber-modified asphalt and method of use
AssigneePRI Asphalt Technologies, Inc.
InventorKenneth F. Grzybowski
Life of this patent
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Abstract
A asphalt binder modifier or a stand-alone asphalt binder and the method of making the asphalt binder or binder modifier are disclosed. The asphalt modifier or binder consisting of treated re-refined engine oil bottoms/VTB's treated by injecting air into re-refining engine oil bottoms/VTB's at temperatures between 150° F. and 550° F. The re-refined engine oil can be processed with ground tire rubber. The binder modifier was blended with various paving and roofing asphalts to form performance-enhanced modified asphalt binders used in paving, roofing, and industrial products.
Claims13
A method of manufacturing a binder modifier, comprising:
- oxidizing re-refined engine oil vacuum tower bottoms, wherein the oxidization comprises:
- obtaining re-refined engine oil vacuum tower bottoms;
- heating the re-refined engine oil vacuum tower bottoms to a temperature of about 150° F. to about 550° F. or to 50° F. below the flash point of the re-refined engine oil vacuum tower bottoms;
- mixing the re-refined engine oil vacuum tower bottoms;
- injecting air into the re-refined engine oil vacuum tower bottoms;
- and
- allowing the re-refined engine oil vacuum tower bottoms to oxidize until a predetermined elastic modulus is achieved.
Dependencies are inferred from the claim text.