Air entrained concrete and Non- Air entrained concrete

Range in proportions of materials used in concrete, by absolute volume.






















Mix 1 and 3 represent rich mixes with small size aggregates.
Mix 2 and 4 represent lean mixes with large size aggregates.

Air –entrained concrete

* Normally used only in exterior environments, but sometimes specified for interior as well.

* Microscopic air bubbles are drawn (entrained) in to batch during mixing.

* Leave tiny air pockets for water to expand in to as it freezes so that it does not build up
pressure inside concrete and cause surface damage.

* Unchecked surface damage can lead to further deterioration in a cycle that can lead to failure.



Non Air –entrained concrete

* Used in environments that requires high durability of structures.