improvements in the production of ballast was pavimen court road

摘要

In the method, weighed quantities of moist, uncoated chipping material and bituminous binding agent are brought via a channel (222) into a drum (6) which has been pivoted into the filling position (R1). Subsequently, the drum is pivoted into the horizontal position and connected to an air heater (12) and a suction fan (18). Simultaneously with mixing, i.e. the rotation of the drum at a speed which corresponds to at least 5% of the centrifugal speed, the blowing in of hot air begins, which air is guided off into the open via a pipe (19). As a result, a premature drying of the uncoated chippings and the associated dust formation are prevented. The dust is absorbed by the binding agent before it can escape into the open via the pipe (19). For emptying, the drum is pivoted into the delivery position (R2) and rotated slowly so that built-in worms convey the coated chippings into a waggon standing underneath. IMAGE