Recycled aggregates

Recycled Asphalt Planings (RAP) and Asphalt Plant waste

Growth in the demand for recycled aggregates has been steadily increasing since the early 1990's.

Planings milled from the road network are a valuable source of aggregate and bitumen. Planings are generally sorted using the screen to a 0/20mm all-in product and re-used in the manufacture of other asphalt mixtures. Up to 50% recycled planings can be mixed with virgin aggregate and bitumen, however a typical addition rate is 10-20%.

Another source of recycled asphalt is plant waste. On the occasions when a batch of asphalt must be discarded or when excess material stored in hot storage bins is not used, this asphalt is removed to the recycling area and cooled, before sorting for re-use.