Batch Mix Technology

The batch-mix method may not be the oldest but it is the most widely used. It consists of dividing up hot mix asphalt production into quantities of between 1,000 kg and 5,000 kg. Each of these parts is generally called a batch. The granular components, along with the fillers, bitumen and any additives are weighed separately before being sent to the mixer. One of the characteristics of the batch-mix method is that the aggregates are metered separately when cold before being dried all together and re-screened when dry. Making sure that the screen sizes conform to the formulation is a key point to which engineers pay particular attention. Figure 1 of the UltiMAP explains the different functions of a traditional fixed batch-mix plant.