Products > Mining Solutions > Anchor Grouts (AG)
MACT AG-BU (High Strength Bottom-Up Anchor Grout)
Target Audience: Ground Support Engineers, Geotechnical Engineers, Project Managers requiring maximum strength and complete encapsulation for bottom-up bolt installation.
High-Flow, High-Strength Anchor Grout for Complete Bottom-Up Encapsulation - >80 MPa Strength
Overview
MACT AG-BU is an ultra-high-strength, shrinkage-compensated cementitious grout engineered for the demanding requirements of bottom-up rock bolt and cable anchor grouting. Its fluid, low-viscosity consistency ensures effortless pumping and complete displacement of air and water from the borehole, guaranteeing full encapsulation of the anchor tendon. AG-BU achieves exceptional early strength (>40 MPa at 24hr) for rapid load application and develops ultimate compressive strength exceeding 80 MPa, providing maximum long-term anchor security.
Key Technical Advantages
- Exceptional Strength: Develops >40 MPa in 24 hours and >80 MPa ultimate compressive strength for critical load-bearing applications.
- Superior Flow: High fluidity ensures complete annulus filling, eliminating voids and maximizing bond area.
- Shrinkage Compensation: Guarantees permanent, intimate contact between grout, anchor, and rock for optimal stress transfer.
- Maximum Encapsulation: Low viscosity and fluid nature ensure complete grout coverage along the entire anchor length.
- Reliable Pumping: Designed for easy pumping through standard grout equipment, even with long delivery lines or tight annuli.
- Consistent Quality: Pre-packaged, single-component mix (add water only) ensures predictable, high-quality results.
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.) | > 40 MPa |
| Compressive Strength (7d) | ASTM C109 (Mod.) | > 60 MPa |
| Compressive Strength (28d) | ASTM C109 (Mod.) | > 80 MPa |
| Flow Cone Efflux Time (Marsh Cone) | ASTM C939 (Mod.) | [Specify Value, e.g., 8-15 seconds] (Fluid) |
| 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. 4.0-4.5 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-BU Technical Data Sheet (TDS) for detailed specifications, testing conditions, and performance curves.
Application Parameters
| Parameter | Value |
|---|---|
| Water Addition | Approx. 4.0-4.5 Litres per 20kg bag (Use minimum required for flow) |
| 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) |
Primary Applications
- Bottom-up grouting of rock bolts and cable anchors in mines, tunnels, and civil structures.
- Applications demanding the highest levels of anchor strength and bond.
- Grouting in challenging ground conditions requiring excellent flow.
Compliance
Formulated to meet or exceed performance requirements for high-strength anchor grouts in Australian 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