A Study on Void Check as Placing Method with Use of V-meter Method

초음파탐사를 통한 타설방법이 공극에 미치는 영향에 관한 연구

When top down method is used, it could be a construction method trouble in column joint, between the former concrete and the latter. It could bring a void and weak concrete in column. The purpose of this study is finding a way to prevent concrete void and concrete suitable for top down, through V-metering for top down column and concrete experiment.