| Geotechnical characteristics of aggregates | Granular classes | Technical specifications/ Category A | |||||||
| Gravel | Sand | Filler | |||||||
| Basalt 8/16 | Basalt 3/8 | Basalt 0/3 | Dune sand | Basalt 0/3 + sand | Basalt | Limestone | Sandstone | ||
| Geometric characteristics | |||||||||
| Aggregate shape—Flakiness index, FI (%) | 18 | 22 B | - | - | - | - | - | - | ≤20 |
| Sand fineness module, Mdf | - | - | 2.79 | 0.92 | 1.86 | - | - | - | -- |
| Physical and chemical characteristics | |||||||||
| Sand equivalent, ES | - | - | 63 | 74 | 66 |
|
|
| >60% |
| Surface cleanliness of gravel, P (%) | 0.39 | 0.88 | - | - | - | - | - | - | ≤5% |
| Methylene blue test MB (g/kg) | - | - | 3.46 | 2.33 | 3.08 | 8.48 | 7.23 | 4.27 | ≤10 g/kg |
| Physical and mechanical characteristics | |||||||||
| Micro-Deval test, MDE (%) | 18 | 16 | - | - | - | - | - | - | <25 |
| Los Angeles test, LA (%) | 14 | 16 | - | - | - | - | - | - | <30 |
| Water absorption coefficient; WA24 (%) | 0.699 | 0.676 | 1.24 | 0.676 | 0.954 | 1.25 | 3.73B | 6.51 B | ≤2.5% |
| Apparent bulk density in (kg/l) | 1.595 | 1.598 | 1.621 | 1.492 | 1.563 | - | - | - | -- |
| Inter-granular porosity | 0.46 | 0.46 | 0.45 | 0.44 | 0.43 | - | - | - | -- |
| Bulk density (kg/l) | 2.976 | 2.978 | 2.921 | 2.657 | 2.765 | - | - | - | -- |
| Filler bulk density (kg/l) | - | - | - | - | - | 3.021 | 2.722 | 2.397 | -- |