Batch or continuous: choosing the right asphalt plant for your programme

Most asphalt plant decisions start with output: how many tonnes per hour the project needs. Output matters, but the more useful question is how the plant will be used day to day. How many mix designs will you produce? How often will you switch between them? Will the plant stay in one place for years or move with the work?

How each plant works

A batch plant dries and heats aggregate, screens it into hot bins, then weighs each ingredient and mixes one batch at a time. A continuous (drum-mix) plant feeds proportioned aggregate and binder into a drum that dries and mixes in a steady flow.

When a batch plant makes sense

• Frequent changes between mix designs, including specialty or coloured asphalt
• Tight quality requirements, such as airport or highway wearing courses
• Supplying several customers or projects from one plant

When a continuous plant makes sense

• Long runs of the same mix on large road programmes
• High volume of base and binder courses
• Higher proportions of recycled asphalt (RAP), where the drum design allows

Questions to answer before you request a quote

• Peak and average tonnage per day, and working hours
• Number of mix designs and how often they change
• Fuel available on site, and emission limits that apply
• Whether the plant will relocate, and how often
• Ambient conditions: summer temperatures and dust

There is rarely a single right answer. The best plant is the one sized and configured for how your programme will really run. If you are unsure, send us what you know and we will help define the rest.