| Percentage of Al-Khamkha % | Dry unit weight (KN/m3) | Optimum water content % |
| 0 | 14.4 | 14 |
| 5 | 15.2 | 15 |
| 10 | 15.67 | 16 |
| 15 | 16.5 | 19 |
| 20 | 14.7 | 25 |
| 30 | 14.3 | 27 |
| 40 | 15.1 | 28 |
| 50 | 14.7 | 29 |