Definition of air entrainment
: the incorporation in concrete or mortar of minute air bubbles (as by addition of soap or grease) to increase resilience and resistance to wear and weathering
air–entrainedadjective Air-entrained concrete is generally easier to work with and can be used even if not specifically called for in the plans and specifications. — Gil L. Taylor, Construction Codes and Inspection Handbook, 2006
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First Known Use of air entrainment
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