Four Vögele feeders supply four Vögele pavers
Four pave trains comprising Vögele pavers and feeders paved the surface, together achieving about 500 t an hour. The time pressure in this phase was likewise tremendous.
Fraport had stipulated the use of feeders in its invitation for bids, because the surface accuracy of the center runway is of critical importance to the airport operator. “Feeders are just ideal here because they prevent jolts and joints in the surface,” says Project Manager Konrad. Engineer Jörg Pigorsch, Heitkamp's Senior Site Manager, therefore deployed four Vögele MT 3000-2i high-performance feeders at the site. They can take on an entire 25 t load of mix from a truck in just 60 seconds.
During transfer to the paving process, the mix is homogenized by special, transverse, conical augers inside the material hopper of the Vögele PowerFeeders. Colder areas along the edges are mixed with warmer mass, and segregated edge areas from unloading the truck are mechanically homogenized. Infrared heating keeps the conveyor at the right temperature to prevent mix from sticking.
Following behind the feeders were four Vögele pavers: Two SUPER 1800-3is, one SUPER 1900-3i and one SUPER 2100-2i paved the surface course "hot to hot” at an impressive width of 31 m. The SUPER 1900-3i played the role of lead paver. During the night shifts in particular, the advantages of its new and intuitive ErgoPlus 3 operating concept soon became evident. The operator’s console has an extra-large color display with a high-resolution image visible even in poor lighting conditions.
High-quality material handling
Another highlight of the SUPER 1900-3i and SUPER 1800-3i is the material handling: In these pavers, the proportional control of the conveyor and augers with continuous monitoring of the mix level ensures an optimum head of mix in front of the screed. Furthermore, the auger height can be hydraulically adjusted by up to 15 cm across its entire working width, including the bearing boxes and limiting plates. An optimum spread of mix is achieved as a result, even when paving thin overlay or varying thicknesses within a single section. With their very large blades measuring 400 mm in diameter, the augers ensure optimum spread of the mix without segregation, even across large paving widths. This was a relevant factor at Frankfurt Airport, where paving widths of 7.5 and 8 m were required.