TESTING DEVICE OF ESTIMATING PERFORMANCE OF CONCRETE PUMPING

摘要

PURPOSE: A concrete pumping performance evaluation device is provided to measure changes in properties of concrete and basic properties for evaluating the fluidity of concrete during pumping. CONSTITUTION: A concrete pumping performance evaluation device comprises a pipe(10) which is installed to be moved left and right by a support and injected with concrete, a first pressing unit(20) which is installed on one end of the pipe and presses the concrete in the pipe according to an external control signal, a second pressing unit(30) which is installed on the other end of the pipe and presses the concrete in the pipe according to an external control signal, a third pressing unit(40) which is installed on the other end of the pipe and slides the pipe to provide flow of concrete according to an external control signal, a pressure sensor(50) which measures the internal pressure of the pipe, a load cell(60) which is installed between the pipe and the third pressing unit and measures the resistance of concrete during the sliding motion of the pipe, and a controller(80) which controls the first through third pressing units and measures the pressure input from the pressure sensor and the resistance input from the load cell.