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High-Range Expansive Mortar (HSCA) | Soundless Cracking Agent
- Introduce
High-Range Expansive Mortar Powder (Soundless Cracking Agent HSCA)
EXPANDAG™ Expansive Mortar is a professional-grade soundless cracking agent engineered to provide massive expansion force when mixed with water. As a premier chemical rock breaking powder, it offers a safe, vibration-free alternative to traditional blasting for controlled demolition and mining projects.
Commonly referred to in the industry as Stone Cracking Powder or Silent Rock Splitting Powder, our HSCA formula is customized to match specific project temperatures, ensuring peak efficiency across global construction sites.
Core Benefits: High-Pressure Cracking
120 MPa Expansion Power: Specifically engineered for high-density granite and reinforced concrete.
Vibration-Free Safety: Eliminates fly-rock, ground tremors, and toxic fumes—ideal for urban zones.
Regulatory Compliance: Requires no explosive licenses, simplifying storage and logistics.
Technical Overview: How it Works
Upon mixing with water and injection into boreholes, HSCA initiates a controlled chemical hydration process. This generates an expansive stress of 100-123 MPa, fracturing the rock from within along the pre-drilled pattern.
Industrial Applications
Precision quarrying for granite, marble, and limestone blocks.
Controlled concrete demolition near residential buildings and hospitals.
Excavation for road widening, tunneling, and underwater rock breaking.
HSCA Temperature Grades & Consumption
| Model | Temperature Range | Regional Recommendation |
|---|---|---|
| HSCA-1 | 25°C – 40°C | Summer / Middle East / Africa |
| HSCA-2 | 10°C – 25°C | Spring and Autumn / Standard Projects |
| HSCA-3 | -5°C – 10°C | Winter / North America / Europe |
| Hole Diameter | Standard Spacing | Consumption (kg per linear meter) |
|---|---|---|
| 38 mm - 40 mm | 30 - 50 cm | 1.7 - 2.0 kg |
Technical Guide: How to Use Soundless Cracking Agent
Follow this field operation guide for optimal results and site safety.
1. Preparation & Drilling
Clean all boreholes of water and dust. We recommend using Expandag rock drills to maintain a consistent hole diameter (34mm-40mm), which is vital for uniform pressure distribution.
2. Mixing Ratio
The standard mixing ratio is 25% – 30% water by weight. For every 5kg bag, add 1.5L of clean water. Pour water first, add powder, and mix until a smooth paste is formed.
Choosing the right HSCA version depends on your local climate. Not sure how much you need?
Use our professional Soundless Cracking Agent Calculator to get an accurate consumption estimate for your project.
Frequently Asked Questions
Q: How long does it take for the cracking powder to work?
A: Cracking typically begins in 2-8 hours. The total expansion pressure peaks within 24 hours. Results vary by rock hardness and ambient temperature.
Q: Can I use HSCA for underwater demolition?
A: Yes. Special underwater versions are available. We recommend using cartridge packaging for sub-surface work to ensure the mortar reacts without being diluted by water.
Q: What is the main cause of blow-outs?
A: Blow-outs usually happen when the HSCA version is too reactive for the current temperature. Always use the correct model (HSCA-1 to 3) and cold mixing water in hot climates.
