The first question: how long on each site?
A mobile plant is justified when it must follow the project, typically when haul distance exceeds what asphalt cooling allows. A fixed plant is justified when one site can supply an area long-term.
Comparison
| Criterion | Fixed | Mobile / containerised |
|---|---|---|
| Time on one site | Several years | A few months per section |
| Dismantling and re-erection | Long | Fast |
| Civil works | Major foundations | Minimal |
| Common capacity | 80–400 t/h | 60–240 t/h |
| Storage | Large asphalt and bitumen silos | More limited storage |
| Typical market | Urban supply, several customers | Successive road sections |
Batch or continuous?
A batch plant weighs each batch: it changes mixes easily and suits varied asphalt. A continuous plant produces in a flow: simpler and economical for one mix in large volumes.
Points to check in both cases
- Aggregate moisture: it reduces actual dryer capacity.
- Available fuel and its local cost.
- Contract dust-collection requirements.
- Asphalt recycling if the contract allows it.
Frequently asked questions
Is a containerised plant as capable?
For medium capacities, yes. It ships in standard sea containers, which simplifies export and remote sites.
What is the maximum haul distance?
It depends on ambient temperature, asphalt type and trucks. This is often what calls for a mobile plant.
Can old asphalt be recycled?
Yes, with suitable recycling equipment, especially on batch plants.