||This article includes a list of references, related reading or external links, but its sources remain unclear because it lacks inline citations. (July 2014)|
The first type of concrete pump is attached to a truck. It is known as a trailer-mounted boom concrete pump because it uses a remote-controlled articulating robotic arm (called a boom) to place concrete with pinpoint accuracy. Boom pumps are used on most of the larger construction projects as they are capable of pumping at very high volumes and because of the labour saving nature of the placing boom. They are a revolutionary alternative to truck-mounted concrete pumps.
The second main type of concrete pump is either mounted on a truck and known as a truck-mounted concrete pump or placed on a trailer, and it is commonly referred to as a line pump or trailer-mounted concrete pump. This pump requires steel or flexible concrete placing hoses to be manually attached to the outlet of the machine. Those hoses are linked together and lead to wherever the concrete needs to be placed. Line pumps normally pump concrete at lower volumes than boom pumps and are used for smaller volume concrete placing applications such as swimming pools, sidewalks, and single family home concrete slabs and most ground slabs.
Concrete pump designers face many challenges because concrete is heavy, viscous, abrasive, contains pieces of hard rock, and solidifies if not kept moving.
Usually, piston pumps are used, because they can produce hundreds of atmospheres of pressure. Such piston-style pumps can push cylinders of heterogenous concrete mixes (aggregate plus cement).
The pump below uses a transfer tube valve, and the one on the right uses seat valves.
Example of pump performance
To illustrate, below are data on a typical concrete sample pump BRF 42.14 H:
- Vertical reach of boom: 41.9 meters (137 ft).
- Horizontal reach of boom: 38.0 meters (124.7 ft)
- Pumping rate: 140 cubic meters per hour (180 cuyd/h).
- Concrete pressure: 70 bar (7,000 kPa; 1,015 psi).
- Cylinder length: 2,100 mm (82.677 in).
- Cylinder diameter: 210 mm (8.268 in).
- Number of substitutions of strokes per minute: 27.
- Number of outriggers legs: 4.
- For concrete pumps technology in general see High-density solids pump.
- Concrete mixing transport truck
- Article on Concrete pumps from TchieWiki
- Dangers of concrete pumping: accident investigation report
- Detail of how a Reed concrete pump works
- Safety related articles
- Page containing an animation of a concrete pump
- The History of Concrete Pumping 
||This article may be expanded with text translated from the corresponding article in the Hebrew Wikipedia. (February 2009)|