Liebherr mixing plant used on river dam project in Vietnam
In a new project in Vietnam, the Se San River is being dammed for a length of 70 km to permit electricity generation. The dammed-up water volume is expected to generate 260 Megawatts of electricity and to secure the electricity supply for 3 million people. Construction of the entire project will cost a total of 263.5 million US dollars and will take four years to come on stream.
Concrete production plays a key part in projects such as this. Substantial volumes of concrete are needed, and have to meet unusual requirements. Three Liebherr Betomix 3,0 A-R/DW mixing plants are in use to ensure reliable concrete production. Two of the Betomix plants work as a tandem system, with a conveyor belt connecting them directly to the dam. For concrete production grain sizes of up to 150 mm are processed. Liebherr twin-shaft mixers and all other components too meet these requirements.
Given the extremely high ambient temperatures, the low target temperature of approx. 8 degrees Celsius needed for the fresh concrete is considered a special challenge. This temperature is necessary to prevent tension-induced cracks from occurring in the dam. The three mixing plants have been fitted with a water-cooled 1,200 cu. m temporary store for hardcore. Ice is added to the twin-shaft mixer as an additional means of cooling the material. Altogether, the three mixing plants have an output of 375 cu. m/hour of cooled, hardened concrete.
