If undisturbed concrete portions are found in the air meter at the end of the test, what is the outcome?

When undisturbed concrete portions are found in the air meter at the end of the test, it indicates that the sample was not adequately stirred or mixed, which is essential for ensuring accurate and representative measurements of the air content. The presence of these undisturbed portions signifies that the test procedure may not have been followed correctly, potentially leading to unreliable results about the air content in the concrete.

For a test to be considered valid, the sample must be homogeneous, meaning that it should represent the entire batch of concrete being tested without large clumps or undisturbed areas. If the concrete was not mixed properly within the meter, the outcome cannot accurately reflect the actual air content, resulting in the test being deemed invalid. Thus, the presence of undisturbed concrete in the air meter directly leads to the conclusion that the test did not meet necessary procedural standards.