Asphalt millings contain approximately five to seven percent asphalt, which is used as a binder for the quarry materials (stone, rock, sand, silt) that make up the load-bearing portion of a bituminous concrete surface. The asphalt millings are produced by grinding a bituminous concrete-paved surface which results in the generation of fine particles of bitumen and inorganic material that made up the road surface. This product may vary slightly in color, texture, and consistency slightly between loads. These variations are normal and do not affect the quality or performance of the material.