| Verbal notation | Physical dimension (1) | Target | Tolerance |
| Mean particle size | d50 (in mm) | 3.25 mm | +/- 0.25 mm |
| Fine particles | < 1 mm | 0% | 0.25% |
| Course particles | > 5 mm | 0% | 1.00% |
| Main range | 2,5 – 4,00 mm | 90% | +/+ 5% |
| Granulometrics spread index (2) | GSI : ((d84-d16) x 100) / (2 x d50) | <18 |
(1) It is assume that the sieve analysis occurs according to CEN, European standard EN 1235/AI
EFBA recommends to use these 7 sieves (5, 4, 3.55,3.15, 2.80, 2.50 and 1 mm)
(2) Former notation as “average size ranger variation”.
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