Estimation of concrete strength by rebound speed ratio type hummer

Abstract

In this study, the applicability of the strength estimation of concrete using a rebound hammer was discussed. Compared to conventional rebound hammer, the newly developed rebound hammer is capable of intensity estimation with high precision. It is shown that in particular it is possible to relatively accurately the intensity estimating also the concrete of the high intensity regions. The potential to reduce the error due to dryness of the concrete was also demonstrated by considering the surface moisture content of the concrete.