MACt Admix

MACt Admix is Australia’s leading powdered additive for Glass Fibre Reinforced Concrete (GFRC), engineered to elevate your concrete formulations across multiple performance areas.

MACt Admix (1-10kg)

Price range: $51.70 through $346.50 Inc GST

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MACt Admix  is Australia’s leading powdered additive for Glass Fibre Reinforced Concrete (GFRC), engineered to elevate your concrete formulations across multiple performance areas. This multi-component powder functions as a water-reducing agent, cure modifier, defoamer, anti-shrinkage solution, and ultra-performance booster—ensuring GFRC mixes that are stronger, more durable, and easier to work with. Its versatile formula also helps minimise crazing, curling, and air entrapment, creating a smoother, more consistent finish ideal for both decorative and high-demand applications.

Key Features & Benefits

  1. Water-Reducing Agent
    • Lower Water Content: Reduces the water-to-cement ratio, leading to higher compressive and flexural strength.
    • Enhanced Workability: Yields a more flowable mix, saving labour and simplifying intricate or large-scale pours.
  2. Cure Modifier & Defoamer
    • Optimised Curing: Improves the rate and consistency of the curing process for a stronger, longer-lasting product.
    • Reduced Air Bubbles: Eliminates unwanted voids that can compromise surface integrity and appearance.
  3. Anti-Shrinkage Technology
    • Less Cracking: Slows moisture loss, minimising contraction-related stresses.
    • Stabilised Final Product: Lowers the risk of future cracking or warping, even in challenging conditions.
  4. Ultra-Performance & Strength
    • High Compressive & Flexural Gains: Fortifies GFRC to withstand heavy loads, impacts, and repeated stress cycles.
    • Improved Surface Finish: Supports the creation of smooth, aesthetically pleasing forms without sacrificing durability.
  5. Mixing Aid
    • Reduced Crazing & Curling: Achieves uniform internal structure, ensuring consistent finishing results across all project scales.
    • Compatible with MACt Plasticiser: Maximises water-reduction potential and overall concrete performance.

Recommended Dosage & Usage

  • Dosage Rate: Typically 3% of the total cementitious content at a 0.28 water percentage.
  • Pair with MACt Plasticiser: Further boosts flowability, strength, and overall concrete quality.

Example Dosage

  • 3% of cementitious content, plus recommended MACt Plasticiser to suit specific project needs.

Versatile Industry Applications

  • GFRC: Thin-walled cladding, architectural panels, and decorative features.
  • Precast Concrete: Beams, columns, panels—improves strength, durability, and surface quality.
  • Decorative Concrete: Countertops, flooring, stamped surfaces—achieves vibrant colours, textures, and finishes.
  • Shotcrete: Sprayed applications (e.g., tunnel linings, pools, retaining walls) for enhanced bond strength and workability.
  • Self-Consolidating Concrete (SCC): Improves flow, strength, and durability without vibration.
  • High-Strength Concrete: Ideal for demanding infrastructure like high-rise buildings, bridges, or heavy-load foundations.
  • Pervious Concrete: Ensures effective water permeability while maintaining robustness and longevity.

How MACt Admix Works

  1. Water Reduction
    • Lowers water demand, boosting compressive/flexural strength and lowering shrinkage potential.
  2. Improved Curing
    • Adjusts the hydration process for more consistent setting and final strength gain.
  3. Defect Control
    • Defoaming and anti-shrinkage measures minimise entrapped air, cracks, and surface inconsistencies.
  4. Extended Durability
    • Creates dense, long-lived concrete capable of resisting weathering, chemical exposure, and mechanical stresses.

Storage & Handling

  • Packaging: 1–10 kg units, sealed to maintain powder integrity.
  • Environment: Store in a cool, dry location, tightly sealed to prevent moisture exposure.
  • Safety: Use appropriate PPE (e.g., gloves, dust mask) to avoid inhaling powder; consult SDS for details.

Why Choose MACt Admix?

  • Comprehensive Enhancement: Addresses multiple concrete performance factors in a single additive.
  • Consistent Quality: Ensures each batch achieves superior strength, surface finish, and resistance to defects.
  • Broad Compatibility: Suitable for GFRC and diverse concrete formulations, from decorative to heavy-duty builds.
  • Trusted in Australia: A proven track record as the go-to powdered admixture for Australian GFRC professionals.
MACt Admix simplifies and strengthens GFRC production by reducing water, improving curing, and mitigating defects like shrinkage or air voids. From architectural panels to complex precast components, this multi-functional admixture enhances concrete’s mechanical properties, aesthetic appeal, and long-term durability. Elevate your project outcomes and streamline your workflow with MACt Admix—trusted by industry leaders and essential for every concrete professional seeking high-grade, reliable results.

Additional information

WeightN/A
Dimensions38 × 25 × 3.5 cm
Bag

10KG, 1KG, 2KG

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

Expect prompt delivery and easy tracking — every order comes with updates along the way.

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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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