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Air Entraining Admixture

Air Entraining Admixture


Application Construction
Purity 99%
Usage Commercial
Color White
Form Powder
Bubbles Diameter 0.3mm-1mm

Air-entraining s cause small stable bubbles of air to form uniformly through a concrete mix. The bubbles are mostly below 1 mm diameter with a high proportion below 0.3 mm. The benefits of entraining air in the concrete include increased resistance to freeze-thaw degradation, increased cohesion (resulting in less bleed and segregation) and improved compaction in low-workability mixes.

The volume of air entrained depends on the application and the mix design. After mixing, air can be lost during transport and pumping. Allowance should be made for this so that the correct level of air is obtained in the hardened concrete. This may mean testing at the point of discharge rathr than at the batching plant. Air entrainment reduces the density of the mix and increases yield. This needs to be taken into account when batching and mixing.

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