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 placed in a testing machine that applies pressure until the material breaks. The maximum load the material can bear before failure is recorded, providing a clear indication of its strength. These tests are crucial in construction and engineering, as they help ensure that materials meet safety standards and can support the intended loads. Results from compressive strength tests inform the design and selection of materials for structures like buildings and bridges, ensuring durability and safety.