Soil Classification as per EN ISO 14688-1
A simpler differentiation is done in European standard [DINENISO14688:2004].
This standard differentiates soils based on soil type, designation and grain size.
Table:
Soil type and grain size fractions as per EN ISO 14688-1 [DINENISO14688:2001]
| Type | Designation | Abbreviation | Grain Size [in (mm)] |
|---|---|---|---|
| Very coarse soil | Large Block | LBo | > 25 (630) |
| Block | Bo |
> 8 up to 25 (200 up to 630) |
|
| Stone | Co |
> 2.5 up to 8 (63 up to 200) |
|
| Coarse Soil | Gravel | Gr |
> 0.08 up to 2.5 (2 up to 63) |
| Coarse Gravel | CGr |
> 0.8 up to 2.5 (20 up to 63) |
|
| Medium Gravel | MGr |
> 2.5 up to 0.8 (63 up to 20) |
|
| Fine Gravel | FGr |
> 0.08 up to 0.25 (2 up to 6.3) |
|
| Sand | Sa |
> 0.002 up to 0.08 (0.063 up to 2) |
|
| Coarse Sand | CSa |
> 0.02 up to 0.08 (0.63 up to 2) |
|
| Medium Sand | MSa |
> 0.008 up to 0.02 (0.2 up to 0.63) |
|
| Fine Sand | FSa |
> 0.002 up to 0.008 (0.063 up to 0.2) |
|
| Fine Soil | Silt | Si |
> 0.00008 up to 0.002 (0.002 up to 0.063) |
| Coarse Silt | CSi |
> 0.0008 up to 0.002 (0.02 up to 0.063) |
|
| Medium Silt | MSi |
> 0.0002 up tp 0.008 (0.0063 up to 0.02) |
|
| Fine Silt | FSi |
> 0.008 up to 0.0002 (0.002 up to 0.0063) |
|
| Clay | Cl | ≤ 0.00008 (0.002) |
