air void

air void

[′er ‚vȯid]
(materials)
A space which is filled with air in cement paste, mortar, or concrete.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

air void

A space which is filled with air in cement paste, mortar, or concrete. Also see entrapped air, entrained air.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
An efficient pre-compaction helps in achieving greater density in asphalt mat and maximizes air void reduction through rollers.
Among features or points technicians note: aggregates, cement paste matrix, crack surfaces, air void distribution and filling, plus embedded reinforcement.
(iv) The performances, such as resistance to rutting and thermal cracking, moisture susceptibility, and volumetric characteristics, such as air void, VMA, VCA, VFA, Marshall stability, and flow value of WMA, were evaluated.
The SGC can be used to design mixtures that do not exhibits classic tender mix behaviour and do not densify to dangerously low air void contents under traffic action.
The thickness and index of refraction of the polymer shell are noted as [epsilon] and [n.sub.2], respectively while the index of refraction of the air void, noted as [n.sub.1], is set to 1.0.
The information includes: Performance Grade (PG) of binder, the theoretical maximum specific gravity, bulk specific gravity, asphalt content and the air void.
Generally, the guides that use compacted specimens to determine optimum binder contents require the design to balance between the abrasion loss of the mix and binder draindown values while retaining adequate amount of air void in the mix to provide good permeability.
Special attention should also be emphasized on the air void level, which should have a lower level to guard against water permeability.
Incorporating 10% air void volume into a coating with 20 vol% [TiO.sub.2] reduces the average refractive index of the coating from 1.82 to 1.76.