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Astec makes blending systems for making rubber modified asphalt mixes. These systems can be portable or stationary and come in a number of configurations. Portable units come with everything neatly packaged on a chassis. They are used for mixing either ground tire rubber or crumb rubber.
Ground Tire Rubber (GTR) is loaded into the hopper before mixing begins and must be replenished during the mixing process. Next the screw conveyor carries the GTR to the mixing chamber. Then, the GTR is blended with virgin asphalt by a high shear mixer running at a speed of 3400 rpm. As the materials are mixed, they are pumped to the portable holding tank. During the mixing process, fresh materials are continuously fed into the chamber until the required volume of material has been mixed.
The portable mixing unit includes the high temperature heating system for the process. Load Cells and Mass Liquid Flow Meters provide extremely accurate material regulation. And the controls can be either panel mounted or included in an air conditioned control room. Low emission options are available for the hot oil heater.
Reaction tanks are also available.
A thermal mixing process is required to turn aggregates and liquid AC into an asphalt pavement mix for road construction. This makes an asphalt mixing plant necessary for road construction. The complete line of Astec asphalt mixing plants, and its range of capacities and features, gives you the choices and flexibility to create your optimum solution.
Throughout the asphalt/roofing industry efficient heating systems and services are needed as well as reliable storage systems. Astec has an extensive background supplying equipment designed for heating and storing liquid asphalt as well as experience with all types of thermal systems.