Impact Echo Method Applied on Bituminous Materials
SIMONIN ; ABRAHAM
Type de document
COMMUNICATION AVEC ACTES INTERNATIONAL (ACTI)
Langue
anglais
Auteur
SIMONIN ; ABRAHAM
Résumé / Abstract
The impact echo method, a non-destructive testing technique based on the use of transient stress waves, has been successfully used for evaluating many different types of concrete and masonry structures. Impact echo can be used to determine the location and extent of defects in structures such as delaminations, voids, and debonding. It can provide accurate measurements of layers thickness or flaws depth. Several devices have been developed to applied impact echo method on concrete structure. However, difficulties appear when using the method on bituminous materials due to their properties (dependence with temperature, influence of Poisson ratio). In this paper, experimental tests illustrate the dependency of impact echo results with temperature. The classical equations used for the interpretation of impact echo surveys on concrete are thus inadequate. We describe a method to estimate the characteristic impact echo frequency in the case of bituminous material presence that introduces temperature dependency
