Breaking granite with a concrete pulverizer (also called a concrete processor or demolition pulverizer) is possible but depends on several factors, including the tool’s design, power source, and granite hardness. Here’s what you need to know:
1. Can a Concrete Pulverizer Break Granite?
– Yes, but with limitations: Concrete pulverizers are designed for crushing reinforced concrete, brick, and softer stone. Granite is much harder (6-7 on the Mohs scale vs. concrete at ~3-4), so efficiency may vary.
– Best for secondary breaking: If the granite is pre-fractured (e.g., by a hydraulic hammer or blasting), a pulverizer can crush it further.
– Not ideal for primary excavation: For solid granite bedrock, specialized tools like hydraulic splitters, rock saws, or heavy-duty breakers are more effective.
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2. Key Considerations
– Tool Strength:
– High-quality pulverizers (e.g., from NPK, Genesis, or Stanley) with hardened steel jaws/teeth perform better.
– Check if the model is rated for hard rock.
– Machine Power:
– Requires a robust excavator (20+ tons for medium granite chunks).
– Low-powered machines may stall or wear out quickly.
– Technique:
– Focus on existing cracks or weak points.
– Use a “crushing and twisting” motion rather than just squeezing.
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3. Alternatives for Breaking Granite
If the pulverizer struggles:
– Hydraulic Hammer/Breaker: Better for initial fracturing.
– Diamond Wire Sawing: Precise cuts in quarries.
– Expansive Grout: Non-explosive cracking for large blocks.
– Drill & Blast: For large-scale operations.
4. Maintenance Tips
– Inspect teeth/jaws frequently for wear.
– Replace hardened tips or adapters when dulled.
– Avoid overheating by allowing cool-down periods.
Conclusion
A concrete pulverizer *can* break granite if it’s already fractured or in smaller pieces, but it’s not the most efficient tool for solid granite. For heavy-duty granite breaking, consider pairing it with a hydraulic hammer or using specialized rock-cutting equipment.
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