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  2. Void ratio - Wikipedia

    en.wikipedia.org/wiki/Void_ratio

    The void ratio ) of a mixture of ... where is the void ratio, is the porosity, V V is the volume of void-space (air and water), V S is the volume of solids, and V T ...

  3. Permeability of soils - Wikipedia

    en.wikipedia.org/wiki/Permeability_of_soils

    The coefficient of permeability varies with the void ratio as e/sup>/(1+e). For a given soil, the greater the void ratio, the higher the value of the coefficient of permeability. Here 'e' is the void ratio. Based on other concepts it has been established that the permeability of a soil varies as e 2 or e 3 /(1+e). Whatever may be the exact ...

  4. Void (composites) - Wikipedia

    en.wikipedia.org/wiki/Void_(composites)

    Void content in composites is represented as a ratio, also called void ratio, where the volume of voids, solid material, and bulk volume are taken into account.Void ratio can be calculated by the formula below where e is the void ratio of the composite, V v is the volume of the voids, and V t is the volume of the bulk material.

  5. Soil mechanics - Wikipedia

    en.wikipedia.org/wiki/Soil_mechanics

    where: is the "maximum void ratio" corresponding to a very loose state, is the "minimum void ratio" corresponding to a very dense state and is the in situ void ratio. Methods used to calculate relative density are defined in ASTM D4254-00(2006).

  6. Aquifer properties - Wikipedia

    en.wikipedia.org/wiki/Aquifer_properties

    where is void ratio, is porosity, V V is the volume of void-space (air and water), V S is the volume of solids, and V T is the total or bulk volume of medium. [1] The significance of the porosity is that it gives the idea of water storage capacity of the aquifer. Qualitatively, porosity less than 5% is considered to be small, between 5 and 20% ...

  7. Porosity - Wikipedia

    en.wikipedia.org/wiki/Porosity

    Used in geology, hydrogeology, soil science, and building science, the porosity of a porous medium (such as rock or sediment) describes the fraction of void space in the material, where the void may contain, for example, air or water. It is defined by the ratio: = where V V is the volume of void-space (such as fluids) and V T is the total or ...

  8. Specific weight - Wikipedia

    en.wikipedia.org/wiki/Specific_weight

    e is the void ratio; Saturated unit weight The unit weight of a soil when all void spaces of the soil are completely filled with water, with no air. The formula for saturated unit weight is: = (+) + where γ s is the saturated unit weight of the material; γ w is the unit weight of water

  9. Water content - Wikipedia

    en.wikipedia.org/wiki/Water_content

    Soil composition by Volume and Mass, by phase: air, water, void (pores filled with water or air), soil, and total.. Water content or moisture content is the quantity of water contained in a material, such as soil (called soil moisture), rock, ceramics, crops, or wood.