A patented circulative heating system combining forced hot air with indirect low-level infrared heat is incorporated into each unit of Martec’s AR2000 Super Recycler train. Air is heated to 600ºC in a diesel-fueled combustion chamber and jets of high-velocity hot air are blown onto the pavement through thousands of small holes in a heating plenum. Hot air is vacuumed for reheating.
The AR2000 Super Recycler’s heating system does not overheat the bitumen, and its three milling drums loosen and remove softened pavement without breaking the aggregate. An automated depth-control feature permits asphalt removal to depths of 50 mm or more in one pass and the milling drums can be adjusted to handle working widths ranging from 3.2 to 4.0 m.
To meet client specifications for the pavement quality, corrective material can be added to the reclaimed asphalt pavement (RAP). A patented Postheating, Drying and Mixing Process ensures thorough heating of the RAP and added material and removes moisture. The mixture is then picked up by a slat conveyor and transferred to an onboard twin-shaft pug mill for final mixing before laydown and compaction by a conventional paver and rollers.