Functional group asphalt modifiers, methods of modifying asphalt, asphalt compositions and methods of making
An asphalt additive comprising a primary rheology modifying component and a secondary rheology modifying component, and asphalt compositions and products having such additive incorporated therein. The primary rheology modifying component is generally a polymer, and the secondary rheology modifying component may comprise a petroleum micro-wax.
1. An asphalt comprising:
ground tire rubber;
a first component comprising a petroleum asphalt; and,
a second component comprising particles formed from a melted mixture of a resin and a binder;
wherein the ground tire rubber and the second component is dispersed within the first component;
wherein the resin comprises polypropylene and polymers having glycidyl functionality and wherein the glycidyl functionality comprises an ethylene-butyl acrylate-glycidyl methacrylate polymer and,
wherein the binder comprises polyethylene by-product waxes.
2. A method of modifying a petroleum asphalt, the method comprising:
combining the petroleum asphalt with an additive to form a modified asphalt,
wherein the additive comprises polypropylene, polyethylene by-product wax and polymers having glycidyl functionality; and,
adding ground tire rubber to the modified asphalt.