PURPOSE: To operate a distributing hose in a light empty state and to control the supply of concrete with a screw.

CONSTITUTION: A concrete container is used for introducing concrete into formwork, particularly, into sliding framework. The container is provided with a downwardly tapering lower portion 3 having an outlet 4. A distributing hose 9 is connected to the outlet 4. The container 1 is supported by a support frame 7. A short pipe 8 is provided between the outlet 4 of the container 1 and the hose 9 and a motor-driven screw 11 is mounted in the short pipe 8. The motor 13 which drives the screw 11 is mounted on the container 1 or support frame 7. The axial length of the screw 11 is made slightly greater than the axial length of the short pipe 8.