A COMPARISON OP THE COMPRESSIVE AND FLEXURAL STRENGTHS OP CONCRETE WITH AND WITHOUT ENTRAINED AIR

摘要

Tests have been made to compare the compressive and flexural strengths, after curing in water or air, of concretes of similar cement content and workability with and without entrained air. Other properties measured were bulk density, ultrasonic pulse velocity, dynamic modulus of elasticity, and change in weight during curing.nAlthough, in general, the compressive and flexural strengths of the air-entrained concrete were less than those of the plain concrete, the difference in flexural strength of air-dry specimens was negligible.