Compressive strength tests measure the ability of a material, such as concrete or metal, to withstand axial loads without failing. During the test, a sample is subjected to increasing pressure until it deforms or breaks. The maximum load the material can bear before failure is recorded, providing a key indicator of its strength. These tests are essential in construction and engineering, ensuring that materials meet safety standards and performance requirements. Common methods include the use of a universal testing machine or compression testing machine, which apply force to the sample while monitoring its response.