Patent ID: 8454740
Filing Date: 2013-06-04
Classification: C08L,E01C

Abstract:
1. A process of preparing a bituminous paving composition comprising the steps of: a) heating an aqueous solution comprising a lubricating substance to a temperature of 30-200° F.; b) combining the heated aqueous solution with an asphalt binder heated to a temperature of 230-340° F.; c) mixing the lubricating substance and asphalt binder in a static mixer or expansion chamber to provide a heated foamed asphalt binder and lubricating substance; and d) mixing the heated foamed asphalt binder and lubricating substance with a heated aggregate to coat the aggregate with the asphalt binder and lubricating substance and form a warm mix paving composition, wherein the warm mix paving composition temperature during paving is 30-80° F. lower than conventional hot mix temperatures.