Effective Flood Control

A 6 m high dam will, in the future, better protect Tnbingen town from flooding

The contractor used a WR 240 / WR 240i soil stabilizer and cold recycler from Wirtgen for this technically very demanding construction job. To build the dam core, the soil was improved by backfilling layers of soil 50 cm thick and pre-spreading binder. These were then homogeneously mixed by the WR 240 / WR 240i, while adding water. The recycler finally stabilized the soil to produce the water-tight dam surface by mixing backfilled material with pre-spread binder and water just as homogeneously to a depth of 50 cm. The water was supplied by tanker trucks and injected directly into the rotor housing in precisely metered quantities.

Efficient production for a7 motorway
In view of the anticipated high traffic volumes with a correspondingly high percentage of heavy traffic, rehabilitation of the A7 motorway near Langenau called for both a sub-base and upper pavement structure of superior bearing capacity. The WR 240 / WR 240i was commissioned to produce a hydraulically bound base course of high quality. First, water and base course binder (15 kg/m²) were distributed on the sub-grade level previously produced by graders. Hydraulic binder was then accurately and homogeneously mixed into the existing gravel material at a working depth of 30 cm by the Wirtgen soil stabilizer and cold recycler. The WR 240 / WR 240i stabilized an area of 16,000 m² altogether and ensured that the hydraulically bound base course could be handed over to the subsequent project divisions on schedule. Characterised by perfect evenness, superior bearing capacity, water and frost resistance, the hydraulically bound base course now forms a stable foundation for the new section of the A7 motorway.