The process that turns piles of unwanted scrap tires
into useful, value-added roadways:

Collected Scrap tires are collected by tire processors.	Ground The tires are ground and all metals and fibers are removed.
Bagged The crumb rubber is packaged in 2,000-lb. supersacks and shipped to the contractor's asphalt plant.	Labeled Each supersack is labeled with its exact weight and other pertinent information.
Lab Blending Rubber-modified liquid asphalt binder for the mix design is made in the lab by blending crumb rubber with unmodified binder.	Mix Design The mix design is performed by ARTS staff using SCDOT Superpave Mix Design procedures.
Hot Mix Asphalt Plant Little or no modifications are required at the contractor's asphalt plant	Blending Unit The blending unit is utilized to make rubber-modified asphalt binder at the asphalt plant.
Pumping The blending unit is connected to a tanker that pumps unmodified liquid asphalt binder into the blender.	Dumping Rubber is added to the liquid asphalt binder.
Blending Rubber-modified liquid asphalt is blended and pumped into the hot mix asphalt plant. The entire process takes about 45 minutes and makes approximately 6,500 gallons of rubber modified asphalt binder per batch.	Testing Rubber Modified Liquid ARTS staff performs quality control viscosity testing on the rubber-modified liquid asphalt at the hot mix asphalt plant during production.
Testing Hot Mix Asphalt The contractor's lab technician performs quality control testing using SCDOT procedures on the rubber-modified hot mix asphalt at the plant during production.	Paving Rubber-modified hot mix asphalt is placed on the road using standard paving equipment.
Compaction Steel wheel rollers are recommended, but rubber tired rollers may be used for finish rolling.	Finished Pavement Rubberized Asphalt Pavement is generally more durable than conventional asphalt pavement.