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Void ratio, in materials science, is related to porosity and defined as the ratio:
and
where e is void ratio, \phi is porosity, VV is the volume of void-space (such as fluids), VS is the volume of solids, and VT is the total or bulk volume. This figure is relevant in composites, in mining (particular with regard to the properties of tailings), and in soil science. In geotechnical engineering, it is considered as one of the state variables of soils and represented by the symbol e.[1][2]
Note that in geotechnical engineering, the symbol \phi usually represents the angle of shearing resistance, a shear strength (soil) parameter.
Because of this, the equation is usually written:
where e is void ratio, n is porosity, VV is the volume of void-space (air and water), VS is the volume of solids, and VT is the total or bulk volume.[3]
Technology, Civil engineering, Soil mechanics, Computer science, Soil
Copper, Ancient Egypt, Lead, Germany, South Africa
Potassium, Weathering, Oxygen, Peat, Iron
Chemistry, Nanotechnology, Engineering, Chemical engineering, Metallurgy
Soil, Peat, Soil mechanics, Pore water pressure, Void ratio
Geotechnical engineering, Rock mechanics, Soil, Liquid limit, Sand
Soil mechanics, Geotechnical engineering, Effective stress, Mineralogy, Civil engineering
Geotechnical engineering, Consolidation (soil), Soil Mechanics, Effective stress, Pore water pressure