ASTM C39 (Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens)

ASTM C39 is a standardized test used to determine the compressive strength of cylindrical concrete samples. It involves applying controlled pressure to a concrete cylinder until it breaks. The test measures how much force the concrete can withstand before failing, which helps assess its quality and suitability for construction projects. This method ensures consistent and reliable results, allowing engineers and contractors to verify that concrete meets specified strength requirements for safety and durability.