Products > Mining Solutions > High Yield Grouts (HYG)
MACT HYG-Fill (Pumpable High Yield Void Fill Grout)
Target Audience: Mine Planners, Geotechnical Engineers, Ventilation Officers, Project Managers needing efficient, cost-effective void filling solutions.
High-Yield, Shrinkage-Compensated Pumpable Grout for Efficient Void Filling - Up to 3x Yield
Overview
MACT HYG-Fill is a premium, cementitious grout engineered for high-yield, pumpable void filling and ground stabilization. Its optimized formulation allows for significant water extension (typically 2:1 to 3:1 water:powder ratio), delivering up to three times the volume of the dry powder and drastically reducing material consumption and cost. HYG-Fill is shrinkage-compensated, ensuring complete, stable filling of voids without settlement, and possesses low viscosity for excellent pumpability and penetration into cavities and behind structures.
Key Technical Advantages
- Exceptional Yield: Achieves up to 3x volume yield with recommended water addition, minimizing material required per cubic meter filled.
- Shrinkage Compensation: Eliminates shrinkage during curing, ensuring total void contact and long-term stability.
- Excellent Pumpability: Low viscosity formulation allows for efficient pumping over long distances without segregation, ideal for remote void access.
- Controlled Flow & Set: Predictable rheology and set times (60-90 min pot life at 20°C) facilitate controlled placement and operational planning.
- Cost Efficiency: Reduces material purchase, transport, and handling costs significantly compared to standard grouts.
- Consistent Performance: Pre-packaged powder ensures reliable batch-to-batch quality.
Performance Data (Typical Values @ 2:1 Water:Powder Ratio)
| Property | Standard | Value |
|---|---|---|
| Compressive Strength (1d) | ASTM C109 (Mod.) | [Specify Value based on TDS] MPa |
| Compressive Strength (7d) | ASTM C109 (Mod.) | ~15 MPa |
| Compressive Strength (28d) | ASTM C109 (Mod.) | ~20 MPa |
| Yield (per 20kg bag @ 2:1) | N/A | Approx. 38-40 Litres |
| Yield (per 20kg bag @ 3:1) | N/A | Approx. 55-60 Litres |
| Flow Cone Efflux Time (Marsh Cone) | ASTM C939 (Mod.) | 15-25 seconds (Typical @ 2:1) |
| Bleed (@ 2hrs) | ASTM C940 | < 1% (Typical) |
| Expansion / Shrinkage (28d) | ASTM C1090 | 0 to +0.1% (Non-shrink) |
| Set Time (Vicat Needle) | AS 2350.13 | Approx. [Specify Value] hours @ 20°C |
| Pot Life (@ 20°C) | N/A | 60-90 minutes (Typical @ 2:1) |
| Density (Wet @ 2:1) | N/A | Approx. [Specify Value] kg/m³ |
Note: Performance data is indicative and highly dependent on the water:powder ratio used. Higher water ratios increase yield but reduce strength. Refer to the official MACT HYG-Fill Technical Data Sheet (TDS) for detailed specifications, performance curves at different ratios, and testing conditions.
Application Parameters
| Parameter | Value |
|---|---|
| Water Addition Ratio (Water:Powder by weight) | 1.5:1 to 3:1 (Consult TDS for strength/yield trade-offs) |
| Mixing Time | Approx. 5-7 minutes (High Shear Colloidal Mixer Recommended) |
| Pumping Pressure | [Specify Max Recommended Pressure] |
| Substrate Temperature | 5°C - 30°C |
| Ambient Temperature | 5°C - 30°C |
| Recommended Equipment | Colloidal Mixer, Grout Pump (Progressive Cavity or Piston) |
Primary Applications
- Filling voids behind ventilation seals, stoppings, and overcasts.
- Backfilling abandoned mine workings and tunnels.
- Stabilizing unconsolidated ground.
- Filling subsidence cavities.
- General large-volume void filling where high strength is not the primary requirement.
Compliance
Formulated using quality cements meeting relevant Australian Standards.
Packaging & Logistics
Supplied as a powder in 20kg moisture-resistant bags or bulk bags (e.g., 1000kg). Contact MACT for delivery options and lead times across Australia.
Next Steps
- Download the full Technical Data Sheet (TDS) (Placeholder Link)
- Request a Safety Data Sheet (SDS) (Placeholder Link)
- Contact a MACT technical representative