Products > Mining Solutions > Shotcretes
MACT Shotcrete-HP (High Performance General Purpose Shotcrete)
Target Audience: Civil Contractors, Tunnel Engineers, Project Managers requiring a robust, high-strength shotcrete for diverse structural applications.
High-Strength, Durable General Purpose Shotcrete - Exceeds 50 MPa, Fibre Reinforcement Options Available
Overview
MACT Shotcrete-HP is a premium, pre-packaged cementitious shotcrete mix engineered for high-strength (>50 MPa) and durable performance in demanding civil and mining applications. Formulated with quality cements, optimized aggregates, and performance-enhancing admixtures, Shotcrete-HP delivers excellent spray characteristics (wet or dry), rapid strength development, and long-term structural integrity. Available with optional integrated steel or synthetic fibres for enhanced toughness and crack control, it provides a versatile solution for tunnel linings, ground stabilization, and structural repairs.
Key Technical Advantages
- High Compressive Strength: Achieves >50 MPa (or project-specific requirements), ensuring robust load-bearing capacity.
- Excellent Durability: Designed for long service life in aggressive underground or exposed environments.
- Optimized Application: Low rebound formulation suitable for efficient wet or dry spray application.
- Fibre Reinforced Options: Available with steel or synthetic fibres to improve ductility, impact resistance, and crack control.
- Consistent Quality: Pre-blended mix guarantees reliable performance and simplifies site quality control.
- Versatile: Suitable for a broad range of applications from tunnel linings to structural repairs.
Performance Data (Typical Values)
| Property | Standard | Value |
|---|---|---|
| Compressive Strength (1d) | ASTM C109 / AS 1012.9 | [Specify Value based on TDS] MPa |
| Compressive Strength (7d) | ASTM C109 / AS 1012.9 | > 35 MPa |
| Compressive Strength (28d) | ASTM C109 / AS 1012.9 | > 50 MPa (or as specified) |
| Flexural Strength (28d) | ASTM C78 / AS 1012.11 | [Specify Value based on TDS] MPa |
| Bond Strength (Pull-off, 28d) | ASTM C1583 / EN 1542 | [Specify Value based on TDS] MPa (Substrate dependent) |
| Drying Shrinkage (28d) | AS 1012.13 | < [Specify Value, e.g., 700] microstrain |
| Fibre Type / Dosage | N/A | Steel / Synthetic (Dosage as per specification) |
| Energy Absorption (Toughness - if fibre reinforced) | ASTM C1550 / EN 14488-5 | [Specify Value based on TDS/Fibre Type] Joules |
| Rebound (Typical) | Application Dependent | < 10% (Wet), < 20% (Dry) |
| Set Time (Vicat Needle) | AS 2350.13 | Approx. [Specify Value] hours @ 20°C (Can be accelerated) |
| Yield (per 20kg bag) | N/A | Approx. [Specify Value] Litres |
| Density (Wet) | N/A | Approx. [Specify Value] kg/m³ |
Note: Performance data is indicative and subject to variation based on water content, accelerator dosage, fibre type/dosage, ambient temperature, and application technique. Refer to the official MACT Shotcrete-HP Technical Data Sheet (TDS) for detailed specifications, testing conditions, and performance curves.
Application Parameters
| Parameter | Value |
|---|---|
| Water Content (Wet Mix) | [Specify W/C Ratio or Slump Target] |
| Water Addition (Dry Mix @ Nozzle) | Operator Controlled (Typical [Value] L/min) |
| Accelerator Dosage (if used) | [Specify % by weight of cement] (Consult TDS) |
| Fibre Handling | Ensure uniform distribution during mixing (Wet) or addition (Dry) |
| Mixing Time (Wet Mix) | Approx. 3-5 minutes (Pan/Truck Mixer) |
| Pumping Distance | [Specify Max Recommended Distance] |
| Substrate Temperature | 5°C - 35°C |
| Ambient Temperature | 5°C - 35°C |
| Recommended Equipment | Standard Wet/Dry Shotcrete Pumps, Nozzles, Mixers (Fibre compatible if required) |
Primary Applications
- Primary and final tunnel linings.
- Slope stabilization and retaining walls.
- Structural repairs and strengthening of concrete elements.
- Shaft linings.
- Hydro-electric projects and dam repairs.
- Architectural shotcrete applications.
Compliance
Formulated to meet or exceed requirements of relevant Australian Standards (e.g., AS 1478.2) and industry guidelines (e.g., EFNARC C1/C2).
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