Fundamental Study on Deterioration Estimation Method of Fire-Damaged Concrete by the Impact Elastic Wave Method.

Abstract

The purpose of this study was to investigate a method to estimate the deterioration area of fire-damaged concrete by the impact elastic wave method, performing measurement from the surface of the concrete. Based on the findings of this study, it is considered that the measured contact time between the surface of the concrete and the hitting hammer can be used to estimate the area of deterioration on the surface, and that multipoint measurement of the propagation time of the elastic wave on the surface of the concrete can estimate the depth of deterioration. However, the estimation accuracy was found to be lower in the case of slight deterioration.