A Study on Strength and Packing Characteristics of Top-Down Joint in Field Experiment

현장실험을 통한 역타설 이음부의 강도 및 충전특성에 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 to find a solution of removing void and air, way to exhaust air in top down column. through specimen concrete placing experiment.