What size specimens should be used for testing according to ASTM C113?

The size of specimens specified for testing according to ASTM C113, which pertains to the testing of refractory materials, is indeed 2 inches by 2 inches by 9 inches. This size is selected to ensure that the test results are relevant and reflect the behavior of refractories in practical applications. Precise dimensions help maintain consistency in testing, which is crucial for comparing results across different batches of materials.

Using standardized specimen sizes also minimizes variability that can arise from shape and size differences, ensuring that factors such as density and thermal properties are accurately measured. In the context of refractory materials, adhering to these specifications is important for evaluating their performance, particularly their resistance to thermal shock and mechanical strength.

Choosing the appropriate specimen size is critical for the integrity of the testing process and the validity of the results obtained, which are vital for quality control and material approval in industrial applications.