HSCA (Soundless Cracking Agent), also known as expansive mortar or stone cracking powder, is a non-explosive demolition material used to break rock and concrete safely. It is a vital rock breaking chemical for projects where traditional blasting is restricted. When mixed with water and poured into pre-drilled holes, HSCA expands and generates pressures exceeding 120 MPa, causing hard rock to crack without vibration, noise, or explosives.
| Feature | HSCA (Expansive Mortar) | Traditional Blasting |
|---|---|---|
| Safety | Very High (Non-explosive) | High Risk (Fly-rock) |
| Regulations | No Permit (MSDS Certified) | Strict Explosive License |
| Pressure | >120 MPa | Instant Shockwave |
| Vibration | None | Strong |
| Noise Level | Silent | Extremely Loud |
Efficient rock breaking depends on both the expansive force of HSCA and the accuracy of the drilling pattern. Proper hole diameter, spacing, and alignment allow the expansion pressure to build evenly inside the rock. In quarrying and tunneling projects, pneumatic rock drills are commonly used to prepare precise boreholes before applying HSCA.
Drilling: Create boreholes according to rock hardness (typically 32mm-45mm diameter). Pneumatic rock drills are recommended for efficiency.
Mixing: Mix HSCA powder with clean water at a ratio of 28%-32% by weight.
Filling: Pour the mixture into holes within 10 minutes of mixing.
Reaction: The chemical reaction builds expansion force of over 120 MPa over 2 to 24 hours.
Rock Cracking: The rock fractures safely along the hole lines.
As a professional non explosive demolition agent, HSCA is widely used in quarrying, controlled demolition, and urban excavation projects where blasting is restricted or prohibited.
Q: How long does HSCA take to crack rock?
A: Reaction time typically ranges from 2 to 8 hours for initial cracks, with full fracture usually occurring within 24 hours depending on temperature.
Q: Can HSCA break hard granite?
A: Yes. With over 120 MPa pressure, Expandag HSCA easily overcomes the tensile strength of hard granite, basalt, and reinforced concrete.
Q: Is HSCA safe for urban demolition?
A: Absolutely. It produces no vibration and no fly-rock, making it the safest choice for demolition in high-density urban environments or near sensitive foundations.
Q: Is HSCA allowed for international shipping?
A: Yes. It is certified as Non-Dangerous Goods (Non-DGR) and supported by full MSDS documentation for smooth global freight.
About Expandag (Hezhou Topking): A manufacturer specializing in pneumatic rock drills and expansive mortar solutions for quarrying, mining, and demolition projects worldwide.
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