Technical Questions

ACI Committees, Membership, and Staff have answered common questions on a variety of concrete related topics.



What is an air-entraining admixture?

Q. What is an air-entraining admixture?

 

A. It is an admixture that causes the development of a system of microscopic air bubbles in cement paste during mixing, usually to increase its resistance to freezing and thawing and to improve workability (ACI 212.3R).

 

References: SP-1(02); ACI CT-18; E4-12; ACI 212.3R-16; SP-288; ACI 306R-18; ASTM C260; ASTM C494

Topics in Concrete: Admixture; Concrete Fundamentals; Materials; Cold Weather

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