AASHTO T 22M/T 22-20 PDF Download

The AASHTO T 22M/T 22-20 standard describes the method for testing the compressive strength of cylindrical concrete specimens. The standard applies to both molded cylinders and drilled cores, and is specifically designed for concrete with a unit weight exceeding 800 kg/m3 (50 lb/ft3).

The standard emphasizes the need for safety precautions, as sudden rupture of specimens can lead to concrete fragments being expelled. This risk increases with the strength of the concrete. Therefore, means must be provided to contain any potential fragments and prevent injury.

To ensure proper testing and safety, it is advised to follow the guidelines provided in the Manual of Aggregate and Concrete Testing, which can be found in the Related Materials section of Volume 04.02 of the Annual Book of ASTM Standards. These recommended safety precautions are essential to protect the individuals performing the test and to achieve accurate results.