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AASHTO T356 – Standard Method of Test for Determining Air Content of Hardened Portland Cement Concrete by High-Pressure Air Meter


This test method covers laboratory determination of the air content of hardened portland cement concrete with the use of the high-pressure air meter.

This determination is made from the observation of change in linear piston movement with a specimen in the test chamber from that of the linear piston movement with no specimen in the test chamber. This change is due to a replacement of specific volume of compressible air by a specific volume of incompressible water.


air content; hardened portland cement concrete