Comparsion of Compressive Strenghts of Concrete Testing by Different of Sclerometers

Schmidt impact hammers are the most widespread devices used for non-destructive testing of concrete for compressive strength. Beside them, also non-standard methods (through Mašek P.D., for instance) are in use to measure informative concrete strength. Theoretically it is supposed that same compressive strengths is obtained from same test area measured with different Sclerometers. But this presumption wasn’t confirmed yet. In case of nonconfirmed tests of concrete it's needed to use only one type of impact hammer. For searching more accurate results are needed to make accurate tests of concrete, everytime for concretes, which are more than 1year old and for using different types of impact hammers for classification the surface of structure.