A NetterVibration customer in the construction industry in Laos was contracted to build a hydropower dam made of several hundred thousand cubic meters of concrete. The aggregates mixed to this concrete were of a size between 20 and 150 mm. The customer wanted NetterVibration to provide a solution that would compact such concrete in a short time, as they had to pour about 180 m³ of concrete per hour.
They purchased 8 NetterVibration NVI 3 Mass Concrete Compacting Units to be mounted on hydraulic excavators. Each equipment consisting of 3 vibrators was connected to the hydraulic system of the excavator and therefore completely autonomous. The NVI 3 works by inserting the internal vibrators (diameter 150 mm) into the moist concrete, applying vibration, and then moving on to the next spot until the whole concrete block has been compacted. The size of one block is such that 2 or 3 excavators work in one block simultaneously.
After one block is compacted the excavators with the NetterVibration NVI 3 Compacting Unit is moved by crane to the next block.