Rock Crusher WRC 240i speeds up recycling project for new trailer port in Dresden

In-situ processing of the ground

The contracted construction company chose the option of in-situ processing of the ground. A Rock Crusher WRC 240i was deployed for the crushing and homogenisation of the ground material on the 12 000 m² site. This meant that the existing material could be re-used in a particularly resource-friendly way and had the added benefit of eliminating the need for transporting materials to and from the site – saving more than 1000 transport movements in all.

Heavy-duty crushing and mixing rotor

The Rock Crusher processed the ground material with its crushing and mixing rotor to a depth of 50 cm. With an advance rate of around 8 m/min, it achieved an average productivity of approximately 450 t/h. The HT18 crushing tools shattered the material on the crushing bars and the screens retained this material in the crushing and mixing chamber until it met the material requirements (grain size: 0/32) and could pass through the 45 mm screen mesh. The homogeneously mixed material that remained behind the WRC was prepared for subsequent stabilisation by the addition of NovoCrete ST98 cement.

Base layer production after the crushing and
mixing process

A bulldozer distributed the material evenly to achieve the desired subgrade. 80 kg/m² of cement mix was spread in two passes by a Streumaster SW 16 MC and then mixed in and homogenised by a soil stabiliser WR 250i. The Wirtgen WR was followed by a soil compactor for pre-compaction, a Grader for producing the fine subgrade and a smooth drum roller for final compaction.

Significant reduction of transport costs

The chosen approach brought the advantages of savings in terms of transport costs, time and resources. The recycling of the existing surface pavement and ground material in-place enabled the realisation of a sustainable and resource-friendly construction process. The base layer with a thickness of 48 cm was completed within two weeks. Soil replacement would have taken 8 to 14 weeks. However, the use of the Wirtgen WRC 240i enabled a significant reduction of the construction time and eliminated the costs of transporting material to and from the site.