PMSA® provides complete mixing and weigh batching systems designed to customer requirements, taking into account the aggregate bin size, number of bins needed and size of mixer.

To achieve consistency in concrete products, it is important to accurately weigh and batch each of the components going into the concrete.

The PMSA® aggregate bin and weighing systems are designed to weigh quickly, accurately and repeatedly for every batch while compensating for varying flows in each of the aggregate bins, resulting in the final manufactured product having a consistently high quality.

PMSA® offer two main weigh systems used in conjunction with aggregates bins:

  • The PMSA® Weigh-belt System – An aggregate bin and weigh-belt system provide for multiple aggregates to be weighed directly on the weigh-belt and discharged into a mixer loader skip or incline belt and are available for mixers with capacities ranging from 300 to 3 000 litres.
  • The PMSA® Travelling Weigh-scale system – An aggregate bin and travelling weigh-scale system provide for multiple aggregates to be weighed in a travelling weigh-scale and discharged directly to a mixer loader skip or incline belt and are available for mixers with capacities ranging from 500 to 4 500 litres.

We offer moisture measuring and control systems, compensating the aggregate depending on the level of moisture in individual aggregates.

Features & Benefits

The PMSA® aggregate bin and weighing systems are Built to Last® and include various features which allow for accurate and consistent batching for decades. The features of these systems include:

Aggregate Bins

  • Aggregate bins are custom designed for the volume of materials that need to be stored, the loading and discharge height of the bins and the flowability of the materials being loaded into the bins.
  • Aggregate bin sizes range from 2 m x 2 m to 6 m x 4 m, depending on the required materials and applications. Custom designed larger bin sizes are also available.
  • As different materials have different flow characteristics (e.g. stone normally flows easily, while sands or crusher dusts do not), each bin is designed to have either a discharge gate or extractor conveyor at the outlet to accurately control the flow of aggregate from the bin to the weigh-system.
  • The bins can also be fitted with specially designed vibrator plates on one or both sides of the cone section of the bin to ensure that the materials that have difficulty flowing will always discharge.
  • Specially designed vibrator plates vibrate only the aggregates and not the structure of the bin, to ensure long-life of the bin and structure.
  • Discharge gates and extractor conveyors are sized according to bin capacity; ensuring batching is fast and accurate.

Weigh-belt system

  • Depending on the length and weight carrying capacity of the weigh-belt, the belt will be suspended by either 4, 6 or 8 load cells for accurate aggregate weighing directly on the belt.
  • This weigh batching system requires no labour to operate, has very low maintenance costs and weighs aggregates fast and accurately.
  • The weigh-belt can also be reversible to supply aggregate to more than one mixer by discharging from either end of the weigh-belt.
  • The weigh-belt can be designed to have dual discharge points from a single end of the weigh-belt. This dual discharge system is used in block plants with both base and topping feed mixers being supplied from a single bin and weigh-belt system (design depends on plant layout).

Travelling weigh-scale system

  • A travelling weigh-scale is used for larger batch sizes or for loading of more than five aggregates and replaces the weigh-belt with a moving aggregate scale.
  • This weighing system also allows for several different discharge positions of the aggregates instead of only either end of a weigh-belt.


The following options are available for aggregate bin and weighing systems:

Split and multiple bin systems

  • To prevent contamination of coarse and fine materials in a single weigh batching system, like base and topping feed, separate weigh batching systems can be installed for each mixer.

Moisture measuring and control

  • Microwave moisture sensors can be installed at the discharge points for each aggregate, which allows the automated weigh batching system to immediately compensate for the amount of moisture in each aggregate by instantaneously changing the batch weight for each aggregate depending on the aggregate moisture during weighing off.
    • This ensures consistency of each aggregate for every mix, resulting in consistent concrete with less variation in the flowability and strength.
    • This means more consistent production capacity and product strengths, eliminating variability, resulting in increased productivity and lower production costs.

Oxide dosing

  • Oxide dosing can be added if required for the colouring of paver and concrete products.
  • PMSA® offers the FINKE oxide doing systems as an option to manual loading of oxides into the mixer.

PMSA®, Pan Mixers®, Built to Last ® and the PMSA® Company Logo are registered trade marks



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