Polymer Concrete Ground Hoppers

Application: Metering of either large or small aggregate bulk filler material for continuous casting of polymer concrete products.

PCinstall325The Polymer Concrete Ground Hopper is generally used in conjunction with Gruber Systems’ Autocaster Ultra/PC (Polymer Concrete) continuous casting system or other systems. Ground Hoppers provide a longer term supply of fillers to the metering hoppers mounted on top of the Autocaster system - so that the continuous casting capability of the Autocaster is not interrupted by the need to resupply the metering hoppers.

Shown at right are two Gruber Systems' Polymer Concrete Ground Hoppers, supplying a Gruber Systems' Autocaster Ultra/PC (Polymer Concrete) continuous casting system with Aggregate Bulk Fillers. Each filler supply in turn keeps the metering hoppers on the top of the Autocaster continuously supplied with aggregate to enable continous operation of the casting system.


Ground Hopper Benefits:

  • Precise, automated metering eliminates waste

  • Eliminate labor costs of manual bulk material handling and tank filling

  • No overhead mountings

  • Compliments a continuous casting system (like the Gruber Autocaster Ultra Polymer Concrete version) by automating the transport of any required filler material.


Gruber offers different Ground Hoppers that are specifically designed for transferring Polymer Concrete fillers:

  • Auger based - three different options for fine particles, small aggregates, or larger aggregates

  • Belt-Drive based - for the largest aggregates such as stones


Polymer Concrete Ground Hoppers Include:

Gruber Polymer Concrete Aggregate Belt Drive Ground Hopper

Designed to handle the demanding requirements of metering large rock or highly abrasive aggregates for polymer concrete and other specialized cast polymer manufacturing applications.

Gruber Large Aggregate Ground Hopper

Auger-based Ground Hopper configured for processing of larger aggregates such as quartz, sand, pea gravel or small rock of up to 3/8” (7 mm) diameter often used in Polymer Concrete and other cast polymer manufacturing applications.

Small Aggregate PC Ground Hopper

Auger-based Ground Hopper configured for processing of smaller aggregates such as sand, small pea gravel, as well as powders such as calcium carbonate or dolomite often used in Polymer Concrete and other cast polymer manufacturing applications.

  • For any application requiring small aggregate and powder fillers
Small Aggregate PC Ground Hopper

For lightweight powders such as Calcium Carbonate blends or ATH blends, choose from our Standard Auger-driven Ground Hopper, or a Pneumatic Transport Ground Hopper that offers some advantages over the auger-driven model.

Ground Hopper and other Bulk Filler Handling related Accessories


The Ground Hopper is one element of a complete bulk filler handling system. All Gruber Ground Hoppers can accommodate either bulk bags (super sacks) or individual bags of filler.  

Review all bulk filler handling products here:

  • Bulk Bag Gantry - automate lifting and positioning of bulk bags over the Ground Hopper for efficient and convenient bulk filler handling.
  • Bulk Bag Roller Conveyor easily transports super sacks to the ground hopper.

  • Bulk Bag Suspender Frame allows suspension of extra bulk filler material (bulk bags) above the ground hopper for additional processing capabilities.

Gruber produces a variety of Ground Hoppers for metering and conveying of fillers of all types. We if don't have what you need, we can custom configure a Ground Hopper to your specific needs for other materials or applications. Please call to discuss your needs.