Answer :
Final answer:
The ASTM standard to obtain a sample of concrete for this test is the ASTM C172-14 Standard Practice for Sampling Freshly Mixed Concrete. This standard provides guidelines for the correct sampling procedures to ensure representative samples are obtained.
Explanation:
The ASTM standard to obtain a sample of concrete for this test is the ASTM C172-14 Standard Practice for Sampling Freshly Mixed Concrete. This standard provides guidelines for the correct sampling procedures to ensure representative samples are obtained. It specifies the equipment, methods, and precautions to be followed during the sampling process.
First, the sample should be taken in accordance with ASTM C 172/C 172M for slump tests and ASTM C 1064/C 1064M for temperature and air content tests. The concrete should be obtained at regular intervals during the discharge of the central mixer or drum mix of the truck, and it should represent the entire load.
Overall, following the ASTM C172-14 Standard Practice for Sampling Freshly Mixed Concrete will ensure accurate and reliable test results.
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