LONG-DISTANCE PUMPING TEST AND UNDERWATER FLUIDITY OF CONCRETE USED FOR FLAP GATE TYPE MOVABLE BREAKWATER

Abstract

 The flap gate type movable breakwater, which was developed in Japan for the purpose of disaster prevention and mitigation measures in response to national resilience, pumps concrete over long distances with complicated pipes and fills it in water. However, there is little knowledge of the fluidity and filling property of concrete. A full-scale test to grasp the properties of concrete in advance is effective, but it requires a large cost and a long period of time. In this study, a full-scale test was conducted. As a result, the pumpability and the fluidity and filling property of concrete in water were confirmed. Furthermore, the flow analysis of concrete was performed. As a result, the fluidity of concrete in water could be reproduced.