Standard Method of Test for
Air Content of Freshly Mixed Concrete by the
Chace Indicator
AASHTO Designation: T 199-00 (2006)
SCOPE
1.1.This method of test covers the determination of the air content of freshly mixed concrete by displacing the air with alcohol and observing the change in level of the liquid in a tube.
The apparatus is light and small, and the test procedure requires only a few minutes.
1.2.This method has been found satisfactory for determining the approximate air content of freshly mixed concrete.
It should not however be considered suitable for replacing T 121Mff 121 (gravimetric method), T 152 (pressure method), or T 196Mff 196 (volumetric method).
In no case should the value obtained through the use of this method be accepted as determining the compliance of the air content of concrete with the requirements of specifications.
The method is most useful for determining whether the concrete has a low, medium, or high air content, and whether the air content is reasonably constant from
batch to batch of concrete.
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