Dry unit weight
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Dry unit weight (γ_{d}) is the dry weight of soil per unit volume. The dry unit weight is usually expressed as kN/m^{3}. Also see bulk unit weight.
Equations[edit]
The following equation can be used to determine the dry unit weight of a soil or solid bulk cargo:
Where:
- γ_{d} = dry unit weight (kN/m^{3}),
- g = acceleration due to gravity (~9.81 m/s^{2}),
- W_{s} = weight of solids,
- V_{t} = total volume,
- ρ_{st} = specific gravity or particle density (t/m^{3} or g/cm^{3}) and
- e = void ratio.
Typical Values[edit]
Typical values of unit weight for soils are shown below^{[1]}.
Soil Type | Saturated Unit Weight, γ_{sat} (kN/m^{3}) | Dry Unit Weight, γ_{d} (kN/m^{3}) |
---|---|---|
Gravel | 20-22 | 15-17 |
Sand | 18-20 | 13-16 |
Silt | 18-20 | 14-18 |
Clay | 1622 | 14-21 |
References[edit]
- ↑ Budhu, M. (2011). Soil mechanics and foundations, 3rd edition. New York: Wiley.
See Also[edit]
- Bulk Density
- Bulk Unit Weight
- Degree of Saturation
- Dry Density
- Moisture Content
- Net Water Content by Weight
- Particle Density
- Saturated Unit Weight
- Specific Gravity
- Unit Weight of Water
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