Study of destructive and non destructive test for codal base minimum grade of concrete

Abstract

A numerous methods of destructive and non-destructive testing have been carried out in the Laboratory. The need of
evaluation the in-situ mechanical properties of the concrete together with the seismic vulnerability assessment were the reasons of
carrying out such amount of test. As non-destructive testing, the surface hardness methods, the ultrasonic methods and the combined
methods have been chosen for the purposes of quality control and in-situ concrete strength estimation. As destructive methods to
determine the strength estimation. As destructive methods to determine the strength of the in –situ concrete, the extraction of
cylindrical specimens (core) from some structural element has been employed. After having briefly described the structure under test
and having presented the result of the testing campaign, we investigate the following aspects: the variation of the mechanical
properties of the in-situ concrete, the reliability of the combined methods, the need to calibrate the resistance obtained Non destructive
methods with the strength of cylindrical specimens (cores) extract from some structural elements in the proximities of the Nondestructive test.