Study on the Bond Mechanism of the Reinforcing Bars by Casting Direction of Recycled Coarse Aggregate Concrete using Acoustic Emission Method

음향방출기법을 이용한 순환굵은골재 콘크리트의 타설방향에 따른 철근의 부착메커니즘에 관한 연구

The objective of this study is to take the first step in creating a user-friendly health monitoring system for recycled aggregate concrete structure using acoustic emission(AE). Each specimen was a cube, the edge of which was 150mm. For pull-out tests, a steel rebar, 13mm in diameter, was embedded in the center of each specimen and casting directions(i.e., vertical and horizontal) were considered in this paper. The AE parameters were analyzed for damage levels(i.e. internal cracking stage, pull-out stage) of all specimens. Results from this study show that event, duration versus amplitude of a signal, showed a clear difference for different loading stages depending upon the concrete casting directions.