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Application of Impact-Echo Method for Heterogeneous Materials
Sanghun LEE,Jun ABE,Shunsuke GOTO,Takao ENDO,TMitsuhiro TAKEDA,Masafumi KITATSUJI 한국방재학회 2014 한국방재학회 학술발표대회논문집 Vol.2014 No.-
Heterogeneous materials such as rock cannot be expected to have homogeneity so as to be used as structural materials. For example, in order to test large rocks more than one cubic meter, measures need to be taken against weaknesses such as internal cracks and fracture zones that can easily be overlooked in compressive strength tests. The impact-echo method could be available for evaluating strength and detecting internal defects in-situ concrete component with relatively good accuracy. In this study, measurements using the impact-echo method were carried for several types of rock specimens used at automobile crash safety tasting, and, by comparing the results with compression strength tests, the applicability of the impact-echo method for strength estimation of heterogeneous materials was evaluated.This work was supported by JSPS KAKENHI Grant Number 25420462.