Abstract
In this paper, to discriminate the material damping and scattering damping of elastic waves in concrete material, Coda waves obtained by actual specimen and numerical simulation was evaluated. Furthermore, to evaluate the complexity of wave structure, Hurst index was obtained by the group delay velocity, assuming that the group delay velocity is one of Fractional Brownian Motion. Material damping was evaluated by P-waves and semi-variogram was obtained to represent the complexity of special randomness. Finally it was found that phase randomness has some correlation with special randomness and this fact may lead to enhancement of quality evaluation of concrete.
