Big MultiPlex ski for optimal evenness
The tolerance of just ± 2 mm on the steeply banked turns posed a challenge. The three SUPER 1900-3i pavers had to deliver precision work, and were equipped with the VÖGELE Big MultiPlex Ski for the job. The sensor system is intended for jobs where absolute evenness in the longitudinal direction is essential. The paving team attached three multi-cell sonic sensors to its variable 5 to 13 m long beam. This enables the Big MultiPlex Ski to scan a reference at several points located a distance from one another. The Niveltronic Plus System for Automated Grade and Slope Control calculates a mean from the measurements taken across the entire measuring range, making up for any unevenness over extended distances.
Screed Assist key to success
Another special feature was the spectacular profile. Despite this, the VÖGELE machinery needed only minor adjustments in order to pave the steeply banked turns. “In order to achieve a high-quality, precompacted result at this extreme incline, we simply had to produce a slightly negative crown”, said Felchner. On banked turns, the pressure on the screed on the inside of the bend is naturally greater due to the slope. The paving team deployed the Screed Assist feature to ensure the mix was laid evenly across the entire width. On VÖGELE pavers, it can be adjusted separately for each side of the screed. This reduced the pressure on the inside of the bend, delivering a homogeneous paving result. “Everything worked as we had anticipated in cooperation with our partners from the WIRTGEN GROUP. That makes us feel as if we can count on this kind of support when we next undertake a comparatively difficult project”, says Mark van Kessel, construction manager, Gebr. Van Kessel B. V.