For M20 grade concrete (1:1.5:3 mix ratio), sand content is calculated as follows:
– Total dry volume: 1.54 m³ per 1 m³ of concrete (accounting for voids).
– Sand proportion: 1.5 parts of the total mix (cement:sand:aggregate = 1:1.5:3).
– Calculation:
Sand volume = (1.5 / (1 + 1.5 + 3)) × 1.54 = 0.42 m³ per m³ of concrete.
To produce high-quality sand for concrete, a well-designed crushing and sand-making line is essential. Key equipment includes:
1. Jaw Crusher – Primary crushing of raw stone (<600mm).
2. Cone Crusher – Secondary crushing for finer output (20–50mm).
3. Vertical Shaft Impact Crusher (VSI) – Sand shaping and grading (<4.75mm).
| Equipment | Model | Capacity (t/h) | Power (kW) |
|---|---|---|---|
| Jaw Crusher | PE600×900 | 50–120 | 75 |
| Cone Crusher | HPT200 | 90–250 | 160 |
| VSI Crusher | S8-1140 | 100–300 | 250×2 |
A vibrating screen removes oversized particles, while a sand washer reduces clay content (<0.075mm) to meet ASTM C33 standards.
– Use multi-stage crushing to optimize particle shape.
– Add dust suppression systems for eco-friendly operation.
<h2FAQ:
Q:What’s the ideal fineness modulus(Mx)for M20 concrete sand?
A:Mx
