This test measures the amount of air within a mixture of concrete and must be started within five minutes after the composite sample is obtained. (This test is not for concrete with lightweight or porous aggregates.)

First the test container must be filled by hand in 3 equal layers.		Each layer is uniformly rodded 25 times. The rod should penetrate into the previous layer about 1 inch.		The mixture must be settled with a rubber mallet to remove air voids.
After consolidation the top of the container is then leveled off in preparation for the pressure-tight seal.		Assemble apparatus. Inject water into the chamber. Pump air into the chamber until gauge hand is at the initial pressure line.		Finally the air is bled off using a release valve. The remaining reading gives an accurate picture of the entrained air percentage.

This is a general guide meant for informational purposes only, for complete testing procedures refer to ASTM standards or contact Pearce Brothers for more information.

Mix Temperature | Slump Test | Molding