Void ratio
The void ratio (also called void ratio ) is a parameter for the characterization of a bulk material, a filter cake or powder. It is a measure of how much space the actual solid fills cavities or which he leaves behind in this because of its grain or fracturing within a certain volume. The pores are usually filled with air and / or water.
The void ratio is the ratio of the void volume ( ie the total volume of all fractures, pores and other cavities of the solid ) to the solid volume ( index s for engl. Jointly ) a porous substance. It can also be derived from the porosity of:
Cavity and solid volume together give the total volume of the porous material:
The range of values of the void ratio is between zero ( solid solid without pores, porosity here also zero ) and infinity (no solid existing tree, material consists only of pores, where the porosity is one; theoretical consideration, not practical ).
- Soil Science
- Dimensionless size