| S | Granulometry* | Description |
| 1 | FS1 + S2 > 50% | Very fine granular |
| 2 | C3 + S + FS > 50% | Fine granular |
| 3 | C + S + FS + MS4 + CS5 > 50% | Coarse granular |
| 4 | GV6 > 50% | Compact |