Answer :
Final answer:
The ASTM standard for capping of cylinders is ASTM C617, which specifies procedures for capping concrete specimens to ensure even loading during compressive strength testing.
Explanation:
The ASTM standard that covers the capping of cylinders is ASTM C617. This standard specifies the accepted procedures for capping both cylindrical and cubical concrete specimens such as cylinders with a compound that permits them to be tested for compressive strength.
The capping process involves the application of a capping compound to the ends of the concrete specimen to provide a smooth, uniform surface that can be tested evenly. This is critical as uneven loading caused by irregular end surfaces can affect the results of the compressive strength test.