testing should be done without damaging the concrete.
The tests available for testing concrete range from the completely non-destructive, where there is no
damage to the concrete, through those where the concrete surface is slightly damaged, to partially
destructive tests, such as core tests and pullout and pull off tests, where the surface has to be repaired after
the test. The properties that can be assessed using non-destructive tests and partially destructive tests is
quite large and includes such fundamental parameters as density, elastic modulus, and strength as well as
surface hardness. In some cases it is also possible to check the quality of workmanship and structural
integrity by the ability to detect voids and cracking.
Non-destructive testing can be applied to both old and new structures. For new structures, the principal
applications are likely to be for quality control or the resolution of doubts about the quality of materials or
construction. The testing of old structures or existing structures is usually related to an assessment of
structural integrity or adequacy.
Typically, there are several methods for non-destructive testing of concrete. For this course, basic two
methods of non-destructive are determined i.e., Schmidt rebound hammer and ultrasonic pulse velocity.