POLYMER-MODIFIED ASPHALT WITH A CROSSLINKING AGENT AND METHODS OF PREPARING
First Claim
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1. A method of preparing a cross-linked, polymer-modified asphalt, the method comprising the steps of:
- heating an asphalt;
adding a crosslinking agent to the asphalt and mixing to form an asphalt-crosslinking agent mixture; and
adding a crosslinkable polymer and an acid to the asphalt-crosslinking agent mixture, wherein the crosslinkable polymer and the acid may be added sequentially without regard to order or the crosslinkable polymer or the acid may be added simultaneously, and mixing to form a cross-linked, polymer-modified asphalt.
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Abstract
Methods of preparing a cross-linked, polymer-modified asphalt is provided. The method involves adding a crosslinking agent to asphalt prior to the addition of a crosslinkable polymer and an acid. Asphalt prepared by the disclosed methods exhibit improved properties such as properties measured by the Multiple Stress Creep Recovery (MSCR) test.
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Citations
44 Claims
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1. A method of preparing a cross-linked, polymer-modified asphalt, the method comprising the steps of:
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heating an asphalt; adding a crosslinking agent to the asphalt and mixing to form an asphalt-crosslinking agent mixture; and adding a crosslinkable polymer and an acid to the asphalt-crosslinking agent mixture, wherein the crosslinkable polymer and the acid may be added sequentially without regard to order or the crosslinkable polymer or the acid may be added simultaneously, and mixing to form a cross-linked, polymer-modified asphalt. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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Specification