Compressive strength is first effected by voids (i.e, approx 90% reduction in
strength of concrete for about 30% of voids).

Flexural strength is secondly effected by voids (i.e, approx 80% reduction in
strength of concrete for about 30% of voids) .

Modulus of elasticity is thirdly effected by voids (i.e, approx 78% reduction in
strength of concrete for about 30% of voids) .



Other properties also effected due to presence of voids are,

* Penetration resistance is reduces will induce less resistance against chemical attacks.

* Internal stress is increases due to increase in voids(freezing and thawing effect).

* Durability of concrete is reduces due to presence of voids.

* Corrosion of steel in RC structural members.