Products > Mining Solutions > Anchor Grouts (AG)
MACT AG-TD (Thixotropic Top-Down Anchor Grout)
Target Audience: Ground Support Engineers, Geotechnical Engineers, Tunnel Supervisors responsible for cable bolt and rock bolt installation.
High-Yield, Thixotropic Anchor Grout for Zero-Loss Top-Down Bolt Installation - >70 MPa Strength
Overview
MACT AG-TD is a high-performance, shrinkage-compensated cementitious grout specifically engineered for the efficient top-down installation of cable bolts and rock anchors. Its precisely controlled thixotropic rheology allows for easy pumping but ensures immediate stiffening upon cessation of flow, effectively preventing grout loss from the borehole collar – even in overhead applications. AG-TD develops high early strength (>30 MPa at 24hr) for rapid bolt tensioning and achieves high ultimate strength (>70 MPa at 28d) for secure, long-term anchorage.
Key Technical Advantages
- Zero Grout Loss: Thixotropic properties prevent sag and loss from the borehole collar, maximizing efficiency and ensuring complete encapsulation.
- High Early Strength: Achieves >30 MPa in 24 hours, permitting faster tensioning schedules and accelerating development.
- High Ultimate Strength: Develops >70 MPa compressive strength for robust, reliable long-term anchorage.
- Shrinkage Compensation: Guarantees intimate contact and optimal stress transfer between the grout, anchor tendon, and rock mass.
- Excellent Pumpability: Flows readily under pump pressure for easy installation.
- Consistent Quality: Pre-packaged, single-component mix (add water only) ensures reliable performance.
Performance Data (Typical Values)
| Property | Standard | Value |
|---|---|---|
| Compressive Strength (4hr) | ASTM C109 (Mod.) | [Specify Value based on TDS] MPa |
| Compressive Strength (24hr) | ASTM C109 (Mod.) | > 30 MPa |
| Compressive Strength (7d) | ASTM C109 (Mod.) | > 50 MPa |
| Compressive Strength (28d) | ASTM C109 (Mod.) | > 70 MPa |
| Flow Characteristics | [Specify Test Method, e.g., Slump Cone] | Thixotropic (Non-slump after initial flow) |
| Bleed (@ 2hrs) | ASTM C940 | Nil |
| Expansion / Shrinkage (28d) | ASTM C1090 | 0 to +0.1% (Non-shrink) |
| Set Time (Vicat Needle) | AS 2350.13 | Approx. [Specify Value] hours @ 20°C |
| Water Demand | N/A | Approx. 3.5-4.0 L per 20kg bag |
| Yield | N/A | Approx. 11-12 L per 20kg bag |
| Density (Wet) | N/A | Approx. [Specify Value] kg/m³ |
Note: Performance data is indicative and subject to variation based on water content, ambient temperature, and application technique. Refer to the official MACT AG-TD Technical Data Sheet (TDS) for detailed specifications, testing conditions, and performance curves.
Application Parameters
| Parameter | Value |
|---|---|
| Water Addition | Approx. 3.5-4.0 Litres per 20kg bag (Use minimum required for pumpability) |
| Mixing Time | Approx. 3-5 minutes (High Shear Colloidal Mixer Recommended) |
| Pumping Pressure | [Specify Max Recommended Pressure] |
| Maximum Pumping Distance | [Specify Value based on TDS/Trials] |
| Substrate Temperature | 5°C - 30°C |
| Ambient Temperature | 5°C - 30°C |
| Recommended Equipment | Colloidal Mixer, Grout Pump (Piston or Progressive Cavity suitable for thixotropic mixes) |
Primary Applications
- Top-down (up-hole) grouting of cable bolts and rock bolts.
- Anchorage in underground mining, tunnelling, and civil engineering projects.
- Situations requiring prevention of grout run-out.
Compliance
Formulated to meet or exceed performance requirements for cable bolt grouts in Australian mining conditions. (Confirm specific AS or industry standards met).
Packaging & Logistics
Supplied as a powder in 20kg moisture-resistant bags or bulk bags. 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