Void ratio

Void ratio

Void ratio, in materials science, is defined as the volume of voids in a mixture divided by the volume of solids. This figure is relevant in composites, in mining (particular with regard to the properties of tailings), and in soil science.

Engineering applications

* Volume change tendency control. If void ratio is high (loose soils) voids in a soil skeleton tend to minimize under loading - adjacent particles contract. The opposite situation, i.e. when void ratio is relatively small (dense soils), indicates that the volume of the soil is vulnerable to increase under loading - particles dilate.

* Hydraulic conductivity control (ability of water movement through the soil). Loose soils show high conductivity, while dense soils are not so permeable.

* Particles movement. In a loose soil particles can move quite easily, whereas in a dense one finer particles cannot pass through the voids, which leads to clogging.


Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • void ratio —    The ratio of (a) the volume of void space to (b) the volume of solid particles in a given soil mass [22] …   Lexicon of Cave and Karst Terminology

  • Void — may refer to:In fiction: * Void (comics), character from WildC.A.T.S. * Void ( Mortal Kombat ), a fictional location or realm in Mortal Kombat * Void , one of the minor villains in Sonic the Hedgehog * Void 1.1, a science fiction wargame created… …   Wikipedia

  • ratio covenant — A form of covenant in a loan agreement that includes conditions relating to such ratios as the gearing ratio and interest cover. Breaching such a covenant could indicate significant deterioration in the company s business or a major change in its …   Accounting dictionary

  • ratio covenant — A form of covenant in a loan agreement that includes conditions relating to such ratios as the gearing ratio and interest cover Breaching such a covenant could indicate significant deterioration in the company s business or a major change in its… …   Big dictionary of business and management

  • void-solid ratio — noun : the proportion of wall surface pierced by windows and doors …   Useful english dictionary

  • Fiber volume ratio — is an important mathematical element in composite engineering. V f = frac{v f}{v c}! Isaac M Daniel, Ori Ishai. (2006). Engineering Mechanics of Composite Materials . 2nd ed. Oxford University Press. ISBN 13: 978 0 19 532244 6] where:: V f is the …   Wikipedia

  • Cation-anion radius ratio — Critical Radius Ratio In condensed matter physics the cation anion radius ratio is the ratio of the ionic radius of the cation to the ionic radius of the anion in a cation anion compound. This is simply given by rC / rA The allowed size of the… …   Wikipedia

  • non-ratio covenant — A form of covenant in a loan agreement that includes conditions relating to the payment of dividends, the granting of guarantees, disposal of assets, change of ownership, and a negative pledge. Breaching such a covenant will usually empower the… …   Accounting dictionary

  • Porosity — or void fraction is a measure of the void (i.e., empty ) spaces in a material, and is a fraction of the volume of voids over the total volume, between 0–1, or as a percentage between 0–100%. The term is used in multiple fields including… …   Wikipedia

  • Consolidation (soil) — Consolidation is a process by which soils decrease in volume. According to Karl Terzaghi consolidation is any process which involves decrease in water content of a saturated soil without replacement of water by air. [citation needed] In general… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”