Pneumatic rubber mandrel

The pneumatic rubber mandrel for architecture engineering has been developed successfully by our factory, that will be able to replace the wood core-model by which hollow concrete structure could be made in the case of pneumatic rubber core-model. It is easy to install or to remove, and it can be used repeatedly for over 150 times, so that the man-hour and material cost could be greatly saved as compared with using wood core-model. It is suitable to pour large-sized reinforced concrete structures of buildings, bridges, tunnels, gates, dams and the like, as a example¡«the Jinzheng brand air-bags had been successfully used to Yellow River dike for building the wall for flood control and prevention of seepage.