Tecwill delivered the COBRA to the construction site of the Smibelg and Storåvat hydroelectric power plants in northern Norway. These power plants are going to be erected at the fjord’s coast, a location which can’t be reached by road. All transports therefore had and have to be carried out by barge from the nearest ocean port.
The concrete plant was completely pre-installed and tested at the Tecwill factory before shipment. In Norway the plant was installed with the support of customer's staff despite harsh winter conditions in just a few days. Production then started in cold weather with strong winds, possible because of the optimal insulation of all plant units without any thermal bridges.
The total construction time for the hydro power plant project is five years (2015-2020). The mobile set-up with movable steel frames as foundations and the loading ramp allows a very easy relocation of all plant structures to the next project. Environmentally as well as cost wise it is an advantage that no foundations have to be built and afterwards left on the site or be demolished and removed. The plant doesn’t require a lot of space, because the loading ramp is a lot lower than those of competitor’s plants.
The concrete mix designs are extremely challenging; concrete with steel fibers for shotcrete and high strength concrete for the hydro power plant structures. To be able to fulfil the sophisticated requirements the concrete plant is equipped with a fully automatic fiber dosing system and a countercurrent planetary mixer for best possible mixing results. Due to Tecwill’s patented “flying” aggregate dosing and weighing system it is possible to dose the fibres on top of the aggregate bed moving on the weighing belt, with the result that they are already widely distributed in the aggregate mix before the content of the holding hopper gets discharged into the mixer.
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Additional information about the COBRA mobile concrete mixing plant:
