AASHTO T 196M/T 196-11 (2019) PDF Download

The AASHTO T 196M/T 196-11 (2019) standard provides a method for determining the air content of freshly mixed concrete. This method is applicable to concrete that contains any type of aggregate, including dense, cellular, or lightweight aggregate.

The purpose of this standard is to ensure accurate measurement of air content in concrete, which is an important parameter for assessing the quality and performance of the concrete. The air content of concrete affects its workability, strength, durability, and resistance to freezing and thawing. By following the procedures outlined in this standard, the air content of freshly mixed concrete can be determined with precision.

The testing method described in this standard is based on the principle of volume measurement. It involves collecting a sample of freshly mixed concrete, which is then subjected to a specific procedure that involves filling a measuring vessel with the concrete, and measuring the change in volume before and after removing the air from the sample. The air content is calculated based on the change in volume.