The core compressive test involves extracting cylindrical concrete samples (cores) from a structure using a drill. These cores are then tested in a lab to determine the compressive strength of the concrete. It provides accurate, reliable data on the material's load-bearing capacity and quality. This test is essential for assessing structural integrity, verifying compliance with design specifications, and identifying areas requiring repair or reinforcement. While more invasive than other methods, it offers precise insights for informed decision-making in structural repairs.