AASHTO T 152-12 PDF
Standard Method of Test for Air Content of Freshly Mixed Concrete by the Pressure Method (ASTM C 231/C 231M-10)
standard by American Association of State and Highway Transportation Officials, 2012
This method covers determination of the air content of freshly mixed concrete from observation of the change in volume of concrete with a change in pressure.
This method is intended for use with concretes and mortars made with relatively dense aggregates for which the aggregate correction factor can be satisfactorily determined. It is not applicable to concretes made with light-weight aggregates, air-cooled blast-furnace slag, or aggregates of high porosity. In these cases, T 196M/T 196, should be used. This test method is also not applicable to nonplastic concrete such as is commonly used in the manufacture of pipe and concrete masonry units.
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