The Batch Conveyor ends in the Mixer Tower and is met by the Aggregate Holding Hopper. This Hopper holds the material until it is ready to go into the mixer. Holding Hoppers can vary to hold between 0.5 - 4.5m3 of aggregates.
They are mostly lined with 6mm mild steel to prevent wear and come with a pneumatic air ram for control the door to deposit into the mixer.