Concrete Admixtures: Air-Entrainment

concrete admixtures : 

Air-Entrainment

Air entrained concrete can increase the freeze-thaw durability of concrete. This type of admixture produces a more workable concrete than non-entrained concrete while reducing bleeding and segregation of fresh concrete. Improved resistance of concrete to severe frost action or freeze/thaw cycles. Other benefits from this admixture are:

• High resistance to cycles of wetting and drying
• High degree of workability
• High degree of durability

The entrained air bubbles act as a physical buffer against the cracking caused by the stresses due to water volume augmentation in freezing temperatures. Air entrainers are compatible with almost all the concrete admixtures. Typically for every 1% of entrained air, compressive strength will be reduced by about 5%.

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