concrete pump
The concrete pump is a construction machine with the help of which concrete can be pressed into a pipeline and pumped into it over a certain distance. With the use of suitable construction principles, the quality of the concrete is retained.
history
Inadequacies in dealing with the conventional casting tower gave the engineers Max Giese and Fritz Hell the idea in 1927 of pumping the concrete from the concrete mixer directly to the point of use. The main thing was to keep the power consumption as low as possible compared to the casting tower method. The reduced water content of the concrete in the pumping process not only saved energy, but also allowed the material to set faster and more firmly. Gravel or broken stone material was used. It was possible to pump up to a height of 38 meters and a distance of 120 meters.
After the Second World War, there were initially only simple concrete pumps that were equipped with a mechanical drive and a mechanical slide valve control. Only conveying heights of up to 30 meters or conveying distances of up to 150 meters could be achieved. With the development of the fully hydraulic double piston pump in the 1970s, the performance and thus the range could be significantly improved. Modern concrete pumps now reach delivery heights of up to 600 meters or delivery distances of up to 1500 meters.
Construction principles
Modern concrete pumps are based on the following two design principles:
- Double cylinder pump
- Rotor pump
Application forms
There are three different ways of using concrete pumps:
literature
- Horst König: Machines in construction: Basics and application . Springer Verlag, 2014, ISBN 978-3-658-03289-0 .
- Gerhard Drees, Siri Krauss: Construction machinery and construction methods . Expert Verlag, 2002, ISBN 3-8169-2060-8 .
Individual evidence
- ↑ Today we say energy expenditure. So the aim was to achieve good energy efficiency .