The construction industry increasingly adopts quarry dust as a sustainable alternative to natural sand in concrete mixes. Modern crushing and sand-making lines are optimized to produce high-quality quarry dust with controlled gradation.
Key equipment for producing qualified quarry dust:
– Primary Jaw Crusher (PE600×900, 75kW)
– Secondary Cone Crusher (HPT300, 220kW)
– Tertiary Impact Crusher (VSI1140, 250kW)
– Air Screen Separator (3-layer, 15kW)
| Equipment | Capacity(t/h) | Power(kW) | Output Size(mm) |
|---|---|---|---|
| Jaw Crusher | 50-180 | 75-132 | ≤150 |
| Cone Crusher | 45-360 | 160-315 | ≤38 |
| VSI Crusher | 60-520 | 180-400 | 0-5(adjustable) |
| Screening | 100-500 | 7.5-22 | – |
Q1: What’s the optimal replacement ratio?
A: Typically 30-50% by weight achieves best strength results.
Q2: How to control quarry dust quality?
A: Maintain proper crushing stages and install air classifiers.
Project Scale: 120km expressway
Solution: Used 40% quarry dust replacement with VSI-shaped particles
Results: Achieved M40 concrete strength while reducing material costs by 18%
