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November-December 2009
 

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October 2009 ISSUE  - Contractors World, the digital publication for construction, mining, quarrying and demolition industries
October 2009

SEPTEMBER 2009 ISSUE  - Contractors World, the digital publication for construction, mining, quarrying and demolition industries
Sept 2009


CP&E
Contractors Plant & Equipment

NOVEMBER 2009 ISSUE  - CP&E - Contractors Plant & Equipment -  the digital publication for construction, mining, quarrying and demolition industries
Nov 2009

 

GERMANY - Long-reach Boom Pumps and Bulk Material Conveyors - cont


Machine Operator Enjoys The Extras

The extensive concreting began in spring 2008. For the production of the bottom slab, which is 5 m thick in places, up to 6,500 m³ concrete (C35/45) were integrated wet-in-wet. The extensive concreting began in spring 2008. For the production of the bottom slab, which is 5 m thick in places, up to 6,500 m³ concrete (C35/45) were integrated wet-in-wet.

To complete the numerous walls, floors and beams, the Putzmeister pumps are in demand almost daily.

BEKA machine operator Ricco Lemm says, “My M 58 is equipped with all the electronic extras offered by Putzmeister, such as systems like EBC, EOC, EPS.M 58 is equipped with all the electronic extras offered by Putzmeister, such as systems like EBC, EOC, EPS.

If you are standing on scaffolding at a height of 20 m, the additional functions are very useful, such as being able to switch the vibrator on the hopper on and off by radio remote control, with the graphical display on the remote control constantly showing me all the important information – even down to the current fluid temperature!”

The squeeze valve – also activated via the radio remote control - remains connected to the “1 metre piece”, the upper part of the split end hose.

When the boom is swung over the formwork, the valve squeezes the end hose together with compressed air, so that no concrete remains inside.

An interesting interface between truck-mounted concrete pumps and stationary concrete placing booms can be seen during concreting of the power houses:Stationary Boom - 55 m height With Lattice Tower

An interesting interface between truck-mounted concrete pumps and stationary concrete placing booms can be seen during concreting of the power houses.

The two PM stationary booms with 32 m horizontal reach are supported on a tubular column, or on a lattice tower, which is extended to up to 55 m in height as the construction progresses. Via a special tube support system, the delivery line is secured on the lattice tower. It is supplied with concrete at the bottom end by one of the BEKA truck-mounted concrete pumps.

Both the outer walls of the four stair towers, which are up to 120 m high, and the seven silos, which are up to 70 m high, are constructed using the climbing slipform procedure.

It is important when concreting with this method that the concrete composition is adapted to the respective outside temperature and sliding speed. Dipl.-Ing. Andreas Michnik, head of work preparation at the construction site said: “As the concrete is placed round the clock, but only relatively small placement jobs are required, we work with a crane bucket. If we used pumps, the concrete would begin to set in the long delivery line!”

[cont]

 
 

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