Published: Jan 1956
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Tests for air content of fresh concrete are of relatively recent development, having first appeared in the publications of the ASTM in 1942. The first method, a volumetric procedure, followed closely the discovery of possible beneficial effects of small amounts of air in concrete on the resistance of pavements to scaling when salt is used for ice removal. Since that time purposeful entrainment of air in concrete has gained such stature that it has been described as the greatest advancement in concrete technology since the promulgation of the water-cement ratio theory by Abrams (1) in 1918. Tests for air content are now probably the third most commonly made tests of concrete, ranking only behind slump and compressive strength tests.
Civil Engineer, Tews Lime and Cement Co., Milwaukee, Wis.
Paper ID: STP39420S