Silica sand, also known as quartz sand, is one of the most abundant and versatile natural resources on Earth. Primarily composed of quartz (silicon dioxide, SiO2), it is formed through the weathering and erosion of quartz-bearing rocks like granite.
The resulting sand grains are typically hard, chemically inert, and resistant to weathering, making them valuable in a wide range of applications.
While the basic composition is consistent, the specific properties of silica sand, such as grain size, shape, and purity, can vary significantly depending on the geological origin and processing methods.
This variation in properties makes different grades of silica sand suitable for diverse uses.
For instance, finer grades are often used in glassmaking and foundries, while coarser grades find applications in construction, filtration, and abrasives.
| Physical Property | Typical Value |
|---|---|
| Specific Gravity | 2.65 g/cm³ |
| Bulk Density (Loose) | 1.5–1.6 g/cm³ |
| Bulk Density (Compacted) | 1.6–1.7 g/cm³ |
| Hardness (Mohs) | 7 |
| Melting Point | 1710 °C |
| pH | 6–8 (Neutral to slightly acidic) |
| Moisture Content | < 0.1% (Dry) |
| Angle of Repose | 30–45 degrees |
| Sieve Analysis / Grain Size | Varies (e.g., 0.1–1.0 mm) |
| SiO2 | 98.15 - 98.85% |
| Al2O3 | 0.50 - 0.80% |
| Fe2O3 | 0.020 - 0.045% |
| TiO2 | 0.04 - 0.08% |
| LOI | 0.35 - 0.50% |
| Appearance | Free flowing Granules |
| Size | Mesh, 8 Mesh 16, Mesh 24, 24-30, 30-60 |
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