The first concrete batching plants of the new Liebherr generation are already up and running. One such plant was recently delivered to Mobil Baustoffe as a double plant. The decisive factors in choosing this Liebherr plant were the high product quality, the space-saving design and the short delivery time.
Strabag will not accept any compromises when supplying concrete to construction sites in the future. Mobil Baustoffe, a subsidiary of Strabag, has acquired two high-performance concrete batching plants of the new generation from Liebherr. With their three m³ twin-shaft mixers, the two batching plants can deliver up to 250 m³ of concrete per hour. Up to 280m³ of aggregates can be stored in the eight chambers of the series silos. The four separate chambers can be filled from one side using swivelling partitions. This means that the double batching plant can be fed efficiently and quickly due to the centralised access to both series silos. Up to six types of binding agent with a total capacity of 600 tonnes can be stored in the cement section.
Thanks to its robust design, the Liebherr batching plant is low-wear and easy to maintain. In addition, the product quality and galvanised design ensure high availability and a long service life. At Mobil Baustoffe, the plant was fully installed within two weeks thanks to easy-to-assemble components and was ready for concrete production a week later. Benefits that are essential for an economical and efficient construction site.
Frequency converters control the drives on the weighing belt, charger skip, cement section and mixer. This can result in up to 30% energy savings, and all processes can be optimised across the board. Hybrid mixing processes and shorter mixing times are easy to achieve, and power peaks are reduced. There is also a considerable reduction in wear thanks to the smooth starting and stopping of the drives. The frequency converters, however, offer the greatest and most important potential in the dosing of cement with an accuracy of +/- 0.5 %. With a typical recipe with 300 kg of cement per cubic metre of concrete, up to 7.5kg of cement can be saved − which is an important argument for the new batching plant generation from an ecological and financial point of view. An excellent example of the innovation of this plant is the two twin-shaft mixers, which can adjust the speed during the mixing process to enable even more precise recipes.
The collaboration between Liebherr, Strabag, and its subsidiary Mobil Baustoffe was said to be outstanding: from installation to operation of the plant, everything went without a hitch. Liebherr says this is an excellent example of how companies can combine their technical expertise and resources to shape a sustainable and efficient future.
