Rockwell Hardness Test : Primarily used in engineering and metallurgy, this test measures the depth of indentation made by a diamond or hardened steel ball under a specific load. The Rockwell scale provides a numerical value indicating the material’s hardness. Assessing the hardness of rocks at construction sites helps in planning excavation, tunneling, or blasting activities. Under... https://perfectcivil.com/rockwell-hardness-test/