Traditional drum trucks and newer mix-when-ready vehicles both deliver concrete, but they suit different jobs. This guide compares their main advantages, explains where each type of concrete mixer performs best, and helps contractors choose the right delivery method for volume, timing, flexibility, and site conditions.

How the Two Trucks Differ

A traditional drum truck collects ready-mixed concrete from a batching plant and keeps the material turning during transport. The concrete arrives as a complete batch, ready to discharge into the pour area or a concrete pump.

A mix-when-ready truck, usually called a volumetric concrete mixer, carries the cement, aggregates, water, and other components separately. It measures and combines them at the site, producing fresh concrete only when the operator starts the machine. The Department for Transport describes volumetric mixers as mobile batching plants that make concrete when required.

Both methods are well established in the UK. Department for Transport estimates published in 2025 suggest approximately 20,000 barrel mixer vehicles operate alongside around 1,000 volumetric mixers, showing that traditional trucks still account for most concrete deliveries.

Where Traditional Drum Trucks Still Win

The main advantage of the old-school concrete mixer truck is efficient delivery of large, planned volumes. The Concrete Society recommends ready-mixed concrete when a project requires several cubic metres or more, while Liebherr positions drum mixers as a reliable way to transport large quantities safely and efficiently.

That makes barrel trucks a strong choice for substantial slabs, foundations, commercial floors, and other continuous pours. When the volume, mix specification, delivery time, and site access are already confirmed, a plant-batched load can arrive ready for immediate placement.

Traditional ready-mix also fits established quality-control systems. The concrete is produced at a dedicated batching plant, where constituent quantities and production processes can be managed before the truck leaves. This approach can give contractors confidence when a large pour needs a consistent mix delivered in planned loads.

A barrel concrete mixer may also discharge material more quickly than a volumetric system can manufacture it on site. That can be valuable when a concrete pump, placing crew, and finishing team need a continuous supply without long interruptions between batches.

However, the project must be ready when the truck arrives. Delays can reduce the available placing time, and ordering too much may leave unused concrete that needs to be managed. Ordering too little can create another problem if an additional load is not immediately available.

Where Mix-When-Ready Trucks Have the Edge

A volumetric concrete mixer offers greater control over when and how much concrete is produced. Because the ingredients remain separate until mixing begins, the operator can stop once the required quantity has been placed. The Department for Transport notes that this approach can reduce waste and help control costs.

This flexibility makes volumetric delivery useful for smaller jobs, repairs, uncertain quantities, and projects that may need more than one mix. The Concrete Society identifies mobile batching or volumetric plants as suitable for smaller concrete quantities, including some DIY and small-scale applications.

Mixing on demand also reduces pressure if site progress is slower than expected. The operator does not have a complete drum of mixed concrete ageing while workers prepare the next section. Production can pause and restart in line with the job, subject to the machine’s capabilities and the supplier’s operating procedures.

Volumetric trucks can also adjust the mix between tasks when the equipment and specification allow it. This may suit projects involving several small pours with different requirements, where ordering separate barrel deliveries would be inefficient.

The trade-off is that volumetric equipment is more like a mobile production plant than a simple delivery vehicle. Accurate calibration, material control, trained operation, and proper maintenance all matter. UK operating rules are also changing: from 2028, volumetric mixers must comply with the standard legal weight limits applied to other heavy goods vehicles once the temporary higher-weight arrangement ends.

Which Concrete Mixer Truck Should You Choose?

Choose a traditional barrel concrete mixer when the project needs a large, known volume delivered efficiently for a continuous pour. It is often the more straightforward option when the site, labour, pump, and finishing equipment are fully prepared and ready to receive the load.

Choose a volumetric truck when the exact quantity is uncertain, the pour is relatively small, or the project benefits from concrete being produced gradually. Its mix-on-demand system can reduce leftover material and provide more control over changing site requirements.

Neither method is automatically better. Old-school drum trucks still offer clear advantages for high-volume, scheduled work, while new-school volumetric systems provide flexibility for smaller, variable, or stop-start applications. The best choice depends on volume, access, timing, specification, and how confidently the project team can estimate demand.

Conclusion

Traditional concrete mixer trucks remain highly effective for large, organised pours where rapid delivery and consistent volume matter. Mix-when-ready trucks are often better for smaller jobs, uncertain quantities, and projects that need greater flexibility. Assess the pour requirements before booking, and contact Multiquip UK for practical guidance on the concrete mixing and placing equipment needed to keep your project moving.