D35 (mm) | D50 (mm) | D65 (mm) | D90 (mm) | Coefficient of uniformity (Cu) | Coefficient of curvature (Cg) | Grade coefficient t (Ggr) | Analysis method |
C31.27 | 36.36 | 41.35 | 51.23 | 1.80 | 0.97 | 1.37 | Sieve analysis |