High-Range Expansive Mortar Powder (Soundless Cracking Agent HSCA)

EXPANDAG™ Expansive Mortar is a powdery chemical agent that swells with immense force when mixed with water. It is the preferred choice for controlled rock breaking and concrete demolition without the dangers of explosives.

Commonly known as Stone Cracking Powder, Rock Breaking Chemical, or Silent Rock Splitting Powder, our HSCA is customized to match your local project temperature for maximum efficiency.

Core Benefits: High-Pressure Cracking

• 120 MPa Expansion Power: Engineered for the hardest granite and reinforced concrete.

• Safe Alternative to Blasting: No fly-rock, no vibration, and no toxic fumes.

• No License Needed: Easy storage and transportation compared to explosives.

Technical Overview: How it Works

When mixed with water and poured into boreholes, HSCA generates an expansive stress of 100-123 MPa, creating a controlled fracture pattern to break rock from within.

Main Applications

• Granite, marble, and limestone quarrying.

• Concrete demolition in urban residential areas.

• Bridge pillar removal and underwater rock breaking.

HSCA Temperature Versions

Technical Specs: Consumption Table

Packaging and Storage

Standard export packaging: 20kg per carton (5kg x 4 vacuum bags). Shelf life: 1 year in dry conditions.

Global Export Strength

How to Use Soundless Cracking Agent (Expansive Mortar) – Field Operation & Safety Guide

This guide explains how to use soundless cracking agent (expansive mortar) for rock breaking, concrete demolition, and quarry operations.

1. Site Preparation

Before application, ensure all boreholes are free from water, stone debris, and dust. A clean hole is essential for the chemical reaction to occur properly.

2. Drilling Requirements

• Hole Diameter: 34mm – 40mm

• Hole Spacing: 20cm – 35cm

• Reinforced Concrete: Recommended spacing is 15cm – 20cm

• Drill holes parallel to the free face (the side where the rock is to be broken).

• Maintain a straight, consistent alignment for all holes in a single row.

• Caution: Do not fill holes immediately after drilling if the rock temperature is high, as excessive heat can cause blowouts.

3. Mixing Ratio & Preparation

Recommended Mixing Ratio for Expansive Mortar: 25% – 30% water by weight.

For every 5kg bag of Soundless Cracking Agent, add approximately 1.5 liters of clean water. Add water first, then the powder, and stir until a smooth, fluid paste is achieved.

Note: Mixing time must be under 5 minutes; apply the mixture immediately after preparation.

4. Filling Procedure

• Fill holes closest to the free face first.

• Proceed to fill subsequent rows in order.

• Ensure all boreholes are filled completely in one continuous operation.

5. Blowout Prevention & Safety

Warning: If the mixed agent begins to harden, generate excessive heat, or smoke, discard it immediately. Do not attempt to reuse or add more water.

Temperature Control: If the ambient temperature is between 20°C and 30°C, perform the application during cooler hours (before 8:00 AM or after 6:00 PM).

Risk Factors for Blowouts: Mixture is too thin, hole diameter is too large, debris in holes, applying while rock is hot, high ambient temperature, or mixing different product types.

Safety Measures: Always wear safety goggles and protective gloves. Avoid skin and eye contact. After filling, place warning signs and prevent personnel from approaching the area.

*Disclaimer: Please strictly follow the product manual provided with your shipment to ensure optimal safety and cracking results.*

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.

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