EXPERIMENTAL STUDY ON THE METHOD AND FREQUENCY OF CERTIFICATION FOR REBOUND HAMMER

Abstract

Rebound number by rebound hummer for estimation of concrete strength decline by the repetitional use. And, it knows that there is a individual difference of the hammer. To get a proper measurement, we must take regularly certification and maintenance.
This paper reports the result of the experiments about the decline by repetitional use and individual difference of each hammer. As those results, we propose the strategy and frequency of certification.