Question

The minimum size sample for making strength test specimens is _____.

a) 0.25 ft³ [7 L]
b) 0.30 ft³ [8.5 L]
c) 0.35 ft³ [10 L]
d) 0.40 ft³ [11 L]

Answer 1

The minimum size sample for making concrete strength test specimens is 0.30 ft³ [8.5 L].

Step-by-step explanation:

The minimum size sample for making strength test specimens in concrete testing is 0.30 ft³ [8.5 L]. This information is standardized and used to ensure that the specimens are large enough to provide accurate strength measurements but not wastefully large. For concrete test specimens such as cylinders used for compressive strength testing, ASTM (American Society for Testing and Materials) specifies this minimum volume to ensure that the test results are representative of the batch and that the sample has adequate dimensions for testing in standard machinery.