REVERSIBLE CONCRETE DRUM MIXER / MINI MOBILE BATCHING PLANT

A reversible concrete drum mixer, also known as a reverse drum mixer or a mini mobile batching plant, is a type of concrete mixing machine widely used on construction sites to produce batches of uniform concrete on-site. Its key feature is a reversible drum that rotates in two directions — forward for mixing and reverse for discharging the concrete.

How It Works

Loading: Cement, sand, gravel (aggregates), water, and any additives are loaded into the drum through a hydraulic hopper.

Mixing: The reversible drum rotates forward, usually clockwise, while internal blades lift and tumble the ingredients to create a thorough, homogeneous mix.

Reversible: Once mixed, the drum’s rotation is switched to reverse, counterclockwise. The same blades now guide the concrete discharge out of the drum through the discharge opening.

Discharge: Concrete flows out in a controlled stream without tilting the drum, reducing spillage and waste.

Key Features -

Reversible drum rotation: One direction for mixing, the opposite for discharge — eliminating the need to tilt the drum.

Internal mixing blades: Helical or angled blades inside the drum ensure uniform mixing.

Portable design: Often mounted on pneumatic wheels or a chassis for easy movement around the job site.

Low noise & low maintenance: Designed for quieter operation and minimal upkeep compared to some other mixer types.

Electric or diesel power: The electric reversible mixer models can be powered by electric motors or diesel engines depending on site conditions.

Batch control: Many machines have weigh-batching systems for precise measurement of materials.

Benefits -

Efficient mixing: Produces consistent, high-quality concrete batches with good homogeneity.

Clean discharge: Reverse rotation pushes concrete out smoothly with minimal leftover material.

Space-saving: Combines mixing and discharge in one compact unit — useful for small/medium sites.

Easy operation: Simple controls and reversible action make it practical for frequent use.

Typical Applications -

On-site concrete production for buildings, roads, pavements, and foundations.

Small/medium construction projects where ready-mix concrete trucks may not be practical.

Precast concrete and infrastructure works.