Highest quality standards had been agreed: to achieve a particularly homogeneous mix (grading curve < 25 mm), the customer specified thorough mixing in three passes. Consequently, the WR 240 / WR 240i first homogeneously mixed pre-spread binder (up to 90 kg/m²) into a 50-cm-thick layer of soil. In the next step, the soil was thoroughly re-mixed while adding precisely metered amounts of water before being homogenized by the WR 240 / WR 240i to make it suitable for placing.
Convenience promotes precision
All the main basic functions are easily and conveniently controlled by the machine operator via the highly precise multi-functional joystick integrated into the right-hand armrest. Automated processes, such as automatic lowering and raising of the milling and mixing rotor, the ergonomically designed workplace and the innovative reverse assist function, make life vastly more convenient for the operator. The extra large steering angle of the rear axle permits swift turning manoeuvres at the end of the short passages, as well as in confined conditions. These advantages improve operator performance.
High engine power and optimum traction allow the WR 240 / WR 240i to work its way through the heavy soil without difficulty. The powerful, directly driven rotor with rotor speeds adjustable from the operator's cab and perfectly matched rotor bars ensure consistently perfect mixing quality. This was also confirmed by every check undertaken by the testing laboratory which closely monitored the quality of stockpile production.
Efficient granulation of coarse rock
Areas adjoining the nearby river Main had to be stabilized during construction of the ICE railway line between Ebensfeld and Erfurt. To this end, soft slate with a grain size of up to 350 mm from a tunnel excavation was transported to the relevant areas, piled up by dozers and then precompacted and de-tensioned by Hamm compactors. To produce a finer grain size, the exceedingly coarse material was homogeneously granulated by the WR 240 / WR 240i at a milling depth of 50 cm in a single pass. In this way, the surface was optimally prepared for thorough re-compaction.
The right choice
The WR 240 / WR 240i is an ideal candidate for such tough jobs. Operating in difficult terrain, it granulated the material in a single pass thanks to its large milling depth. High engine power, a powerful direct belt drive, impressive cutting performance and high rates of advance are crucial here. A robust rotor housing with rotor optimized for performance is essential to produce the specified small-size material at a high rate of advance. Although granulating the large rocks produces considerable noise and vibrations, these disturbances are not felt in the soundproof, vibration-damped cabin. Even high summer temperatures, the operator stays pleasantly cool in his spacious, ergonomically designed cabin, for an efficient automatic climate control system ensures relaxed productive working in all weathers.