Products > Mining Solutions > High Yield Grouts (HYG)
MACT HYG-Foam (Ultra High Yield Foamed Grout)
Target Audience: Geotechnical Engineers, Mine Planners, Project Managers requiring maximum volume yield for large void filling with minimal material usage.
Ultra High-Yield Foamed Cementitious Grout - Achieve Up to 5x Volume for Lightweight Void Filling
Overview
MACT HYG-Foam represents the pinnacle of void filling efficiency, offering an ultra-high yield (up to 5x volume) through a controlled foaming process. This advanced, shrinkage-compensated cementitious grout system creates a stable, lightweight fill material with excellent flow characteristics. By incorporating a precise volume of air via a compatible foaming agent, HYG-Foam drastically reduces the required powder quantity, minimizing material costs, transportation, and handling efforts for large-scale void filling, backfilling, and stabilization projects.
Key Technical Advantages
- Maximum Volume Yield: Achieves up to 5x the volume of the base grout mix, offering unparalleled material efficiency and cost savings.
- Lightweight Fill: Produces a low-density grout (0.8-1.2 g/cm³, adjustable) reducing dead load on underlying structures or strata.
- Superior Flowability: Foamed consistency enhances flow, ensuring complete filling of complex and large voids.
- Shrinkage Compensation: Ensures volume stability during curing, preventing settlement.
- Thermal/Acoustic Properties: Entrained air provides inherent insulating properties compared to solid grouts.
- Reduced Logistics: Significantly less powder material required per cubic meter filled compared to conventional grouts.
Performance Data (Typical Values - Dependent on Foam Ratio & Base Grout Mix)
| Property | Standard | Value |
|---|---|---|
| Compressive Strength (7d) | ASTM C109 / C495 (Mod.) | 5-10 MPa (Typical range, density dependent) |
| Compressive Strength (28d) | ASTM C109 / C495 (Mod.) | 8-15 MPa (Typical range, density dependent) |
| Density (Wet, As Placed) | ASTM C796 | 0.8 - 1.2 g/cm³ (Adjustable via foam ratio) |
| Yield (per 20kg base powder + agent) | N/A | Up to 100 Litres (Approx., depends on target density) |
| Expansion / Shrinkage (28d) | ASTM C1090 | 0 to +0.1% (Non-shrink base grout) |
| Foam Stability (Drainage) | [Specify Test Method] | [Specify Value based on TDS] (Low drainage) |
| Cell Structure | Visual Inspection | Fine, uniform, closed-cell structure (Typical) |
| Set Time (Base Grout) | AS 2350.13 | Approx. [Specify Value] hours @ 20°C |
| Thermal Conductivity | ASTM C518 | [Specify Value based on TDS] W/(m·K) (Low) |
Note: Performance data is indicative and highly dependent on the base grout mix design, foaming agent type and dosage, foam generation equipment, and placement technique. Refer to the official MACT HYG-Foam Technical Data Sheet (TDS) and specific project mix designs for detailed specifications and testing conditions.
Application Parameters
| Parameter | Value |
|---|---|
| Base Grout Water:Powder Ratio | [Specify Ratio, e.g., 0.4-0.5] (Consult TDS) |
| Foaming Agent Dosage | [Specify % by weight of cement or L/m³] (Consult TDS) |
| Foam Generator Settings | Pressure: [Value], Airflow: [Value] (Equipment dependent) |
| Mixing (Base Grout) | High Shear Colloidal Mixer Recommended |
| Mixing (Foam Injection) | Inline injection post-pump or specialized foam mixer |
| Pumping Pressure | [Specify Max Recommended Pressure - typically low] |
| Substrate Temperature | 5°C - 30°C |
| Ambient Temperature | 5°C - 30°C |
| Recommended Equipment | Colloidal Mixer, Grout Pump, Foam Generator, Injection Lance |
Primary Applications
- Filling large underground voids, stopes, and abandoned workings.
- Lightweight backfilling behind retaining structures or tunnel linings.
- Subsidence control and remediation.
- Construction of ventilation seals where high strength is secondary to volume.
- Applications requiring thermal or acoustic insulation.
Compliance
Formulated using quality cements meeting relevant Australian Standards.
Packaging & Logistics
Base Grout Powder: Supplied in 20kg moisture-resistant bags or bulk bags. Foaming Agent: Supplied separately in appropriate containers (e.g., 20L pails, 200L drums). Contact MACT for delivery options and technical support regarding equipment.
Next Steps
- Download the full Technical Data Sheet (TDS) (Placeholder Link)
- Request a Safety Data Sheet (SDS) (Placeholder Link - for powder & agent)
- Contact a MACT technical representative