Patent ID: 8138242

Claim:
A bituminous paving process, which process comprises: a) mixing an asphalt binder, aggregate and 0.1-1.0 wt % lubricating additive based on the asphalt binder weight at a first temperature greater than 150° C. to form a bituminous mix consisting essentially of aggregate coated with asphalt binder and lubricating additive, wherein the lubricating additive comprises viscosity modifiers or dispersant viscosity modifiers selected from the group consisting of viscosity modifiers and dispersant viscosity modifiers used in engine lubricating oils, residual bottoms from refined recycled engine lubricating oils, extrusion processing aids, molding processing aids, polyolefins, ethylene vinyl acetates, acrylic polymers, silicones, elemental sulfur, and sulfur derivatives used in fuels to provide lubrication properties, and wherein a blend of the asphalt binder and lubricating additive has a measured maximum normal force no more than about 5.5 Newtons at 90° C. using a dynamic shear rheometer with a 50 μm gap, and b) compacting the bituminous mix at a second temperature less than 130° C. and at least about 55° C. below the first temperature to provide bituminous pavement having field density values of less than 10% in place air voids for the compacted bituminous mix.