| Ρ | Bulk density |
| Gs | Specific Gravity |
| D10 | Diameter corresponding to 10% finer in the particle-size distribution |
| D50 | Diameter corresponding to 50% finer in the particle-size distribution |
| D60 | Diameter corresponding to 60% finer in the particle-size distribution |
| D30 | Diameter corresponding to 30% finer in the particle-size distribution |
| Cu | Uniformity Coefficient of uniformity |
| Cz | Coefficient of curvature |
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