GRC250S Combination Mixer System

The GRC250S Combination Mixer from Power-Sprays is a high-capacity, high-shear solution for both premix and spray-based GRC production. With a 250 kg batch capability, powerful 15 kW variable-speed motor, and pneumatic discharge system, it ensures rapid mixing, easy maintenance, and consistent fibre dispersion—perfect for large-scale manufacturing.

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The Power-Sprays GRC250S Combination Mixer expands Power-Sprays’ specialist mixer range for Glassfibre Reinforced Concrete (GRC). Building on the success of the smaller GRC125S, this high-capacity mixer easily handles batches of Premix GRC up to 250 kg (550 lbs). Equipped with a powerful 15 kW variable-speed motor, the GRC250S effectively produces both slurry for hand-spray GRC and robust Premix GRC, making it an ideal solution for demanding production environments that value efficiency, consistency, and ease of maintenance.

Key Features & Benefits

  1. High-Capacity Production
    • Up to 250 kg Premix: Perfect for manufacturers scaling production while maintaining stringent quality standards.
    • Versatile Applications: Designed for Vibration Cast, Self-Compacting, and Spray-Premix GRC systems.
  2. High-Shear Mixing
    • Superior Slurry Preparation: Delivers high-quality mixes essential for traditional “sprayed” GRC, ensuring uniform fibre dispersion.
    • Controlled Variable Speed: Frequency inverter-driven motor allows precise adjustment to meet specific mix requirements.
  3. Efficient Discharge System
    • Pneumatic Bottom Discharge Valve: Integrated vibration mechanism ensures fast, thorough emptying of material.
    • Reduced Downtime: Rapid discharge minimises waiting times between batches, boosting overall output.
  4. Easy Cleaning & Maintenance
    • Pneumatic Lift/Lower Mechanism: Enables quick access to the motor and mixer cover for hassle-free cleaning or inspection.
    • Modular Steel Support Structure: Robust frame designed to accommodate optional platforms, access stairs, and guardrails.
  5. Customisable & Scalable
    • Wide Array of Accessories: Automated dispensers for water, polymers, and admixtures; dry-material weighing/batching systems; and fibre choppers.
    • Tailored to Your Needs: From small-scale setups to fully automated lines, the GRC250S adapts to evolving production demands.

Technical Specifications

ParameterDetail
Dimensions170 cm (W) × 173 cm (D) × 361 cm (H) (to top of motor when raised)
Access Under Platform130 cm (W) × 89 cm (D)
Maximum Drum Capacity200 L
Discharge Diameter20 cm
Discharge Height90 cm
Motor15 kW, variable speed (frequency inverter control)
Electrical Supply380/415 V, 50 Hz (other options on request)
Air Supply6 L per lift at 7 bar (100 psi)

Optional Accessories

  • Platform Extensions & Access Stairs Facilitate safe, ergonomic access for operators working with larger batches.
  • Guard Rails Increase operator safety and compliance for elevated work areas.
  • Automated Dispenser Systems Volumetric water, admixture, and polymer dispensers with Power-Sprays’ “HP water wash” option for consistent, high-quality mixes.
  • Automated or Semi-Automatic Weigh/Batch Systems Precisely measure dry materials to reduce manual errors and improve mix consistency.
  • Fibre Choppers & Dispensers Ensure accurate, automated fibre integration in Premix GRC applications.

Why Choose the GRC250S Combination Mixer from Power-Sprays?

  • Scaled-Up Efficiency: Designed for larger GRC batches, enabling higher output with minimal compromise on mix quality.
  • Industry-Leading Technology: Power-Sprays’ extensive GRC experience underpins the mixer’s high-shear system for superior fibre distribution and mix uniformity.
  • Operator-Centric Design: Pneumatic lift mechanism and steel support structure simplify both daily use and routine maintenance.
  • Adaptable Production: Compatible with various GRC production methods, from premix to slurry-based applications, ensuring long-term flexibility.
For operations seeking a robust, high-capacity GRC mixer, the GRC250S Combination Mixer delivers efficiency, reliability, and seamless integration into diverse production workflows. Its versatile, high-shear mixing capability—backed by Power-Sprays’ reputation for engineering excellence—ensures consistent, top-tier GRC quality. Whether you’re scaling up existing operations or establishing a new production line, the GRC250S stands ready to meet demanding industry requirements with ease.

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We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.
To start a return, you can contact us at sales@mact.au
Please note that returns will need to be sent to the following address:
Unit 3C, 919-925 Nudgee Road, Banyo, QLD, 4014, Australia
If your return is accepted, we’ll send you instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted. Please note that if your country of residence is not Australia, shipping your goods may take longer than expected.
You can always contact us for any return questions at sales@mact.au

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Got any question?

Browse through our frequently asked questions to find answers on everything from mould preparation and casting techniques to finishing and long-term maintenance.

Australia’s warm and, in many regions, coastal climate necessitates adjustments during manufacturing. High temperatures can accelerate hydration, so controlled curing environments—such as covering pieces with plastic to retain moisture—are essential. Additionally, lower water-to-cement ratios and carefully selected admixtures help mitigate rapid evaporation and ensure that GFRC develops its designed strength and durability.

Manufacturers address these challenges by:

  • Using precision mixing equipment to achieve a uniform blend and ensure proper fibre distribution.
  • Fine-tuning spray parameters (such as pressure, nozzle design and technique) to avoid voids, pinholes and surface defects.
  • Regular maintenance of equipment and continuous operator training.
  • Adjusting admixture dosages as required to optimise workability and adhesion.

Future trends include increased automation—such as robotic spraying and digital mould design—as well as a greater focus on sustainable practices (e.g. incorporating recycled materials and eco-friendly admixtures). Advances in fibre treatment technology and computer-aided manufacturing are enabling more complex, custom-designed panels. Ongoing research is continually refining mix designs and curing methods to better suit Australia’s diverse environmental conditions.

GFRC is a composite product that combines high‐quality cement, fine aggregates, polymers and alkali‐resistant glass fibres – all premixed to the correct proportions. Its high strength‐to‐weight ratio, durability and capacity for being cast in thin, custom shapes make it ideal for creating stylish and long-lasting benches and tables for both indoor and outdoor use.

GFRC manufacturers must comply with Australian building codes and standards relating to precast concrete, structural performance and safety. This means that production processes, material testing and installation methods are stringently monitored and documented. Close collaboration with local certifying bodies ensures that GFRC products meet all necessary performance and regulatory requirements.

With our premix product, all the ingredients are already proportioned for optimal strength and workability. This means you can focus on preparing your moulds and executing a neat cast rather than measuring raw materials.

Moulds for benches and tables can be constructed from high-density foam, melamine, or even silicone for more intricate designs. It is essential that the mould is smooth, watertight and well supported. Pre-treat the interior with a quality release agent to ensure that the cured GFRC can be removed cleanly.

Typical additional admixtures levels for a 20kg:

  • Water: 2.78L–3.0L
  • Plasticiser: 10g – 50g
  • Fibres HD: 50g-300g
  • Fibres Bundled: 400g-700g
  • Retarder: 5g-20g
  • Accelerator: 5g–20g
  • Defoamer: 1g-3g
  • Colour: up to 800g

*NOTE: All admixes will alter the way the mix behaves.

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