Evaluation of mechanical parameters in repair concrete with impact-echo test method

Nondestructive Testing of Concrete and Masonry” which is a summary of the results of analytical, laboratory and field studies dealing with different applications of Impact-Echo method (Sansalone & Streeet 1997). Some investigators presented a new inspection of Impact-echo that it is the first nondestructive technology to be part of a regulating standard for quality control in civil engineering in Germany (Grosse et al., 2006).