International Science and Technology Journal

This research aims primarily to obtain a relationship between non-destructive examination methods to estimate the compressive strength of concrete, as the world is witnessing a rapid development in construction methods, and the pouring and production of concrete through advanced technical methods, which requires high precision in implementation and through conducting traditional coalition tests to find the compressive strength of concrete, such as examining (Cubes or cylinders), despite their simplicity and popularity, are no longer compatible with these modern methods and do not accurately reflect the quality of the concrete used in terms of strength and durability or even to identify cracks or weak areas. Therefore, we aimed for non-destructive tests, which include Schmidt hammer tests and ultrasound examinations. Through it, we work to create a graphical model that can quickly diagnose the suitability of concrete before continuing with all stages of construction in order to ensure the safety of the building, save the cost of construction, improve its quality, and neutralize defects. Cracks in cracked concrete structural elements are obtained and resisted more precisely by incorporating The results of the tests taken together and compared to the results of breaking cubes on which the tests were conducted, compared to if the results of each test were relied upon separately. Keywords: Non-destructive testing//rebound hammer/ultrasound/ compressive strength of concrete.