A16 Rottemerentunnel - Concrete truck and concrete pump
www.joostdevree.nl/shtmls/betonpomp.shtml
English:
Concrete Pump
A concrete pump is an installation with which concrete mortar is pumped from the concrete truck (agitator, truck mixer) to the formwork.
When the concrete mixture has to be pumped to a great height, extra powerful concrete pumps are needed. The traditional concrete pump can handle a pressure of approx. 85 bar; 200 bar may be required for extremely high construction. The risers etc. must be able to withstand that pressure. In the case of extremely high buildings, an intermediate station can optionally be used, so that the counter pressure of the concrete mixture in the pipeline is less great.
For example, the concrete pump quickly fills the foundation with fresh concrete, creating air bubbles. The air bubbles are removed by briefly holding a vibrator in the concrete for a few seconds. The internal vibrator ensures that all air bubbles are vibrated upwards and that the concrete is compacted. If the internal vibrator is kept in the concrete for too long, water will build up on the concrete.
A16 Rottemerentunnel - Concrete truck and concrete pump
www.joostdevree.nl/shtmls/betonpomp.shtml
English:
Concrete Pump
A concrete pump is an installation with which concrete mortar is pumped from the concrete truck (agitator, truck mixer) to the formwork.
When the concrete mixture has to be pumped to a great height, extra powerful concrete pumps are needed. The traditional concrete pump can handle a pressure of approx. 85 bar; 200 bar may be required for extremely high construction. The risers etc. must be able to withstand that pressure. In the case of extremely high buildings, an intermediate station can optionally be used, so that the counter pressure of the concrete mixture in the pipeline is less great.
For example, the concrete pump quickly fills the foundation with fresh concrete, creating air bubbles. The air bubbles are removed by briefly holding a vibrator in the concrete for a few seconds. The internal vibrator ensures that all air bubbles are vibrated upwards and that the concrete is compacted. If the internal vibrator is kept in the concrete for too long, water will build up on the concrete.