The operating principle of soil stabilisation

The modern cold recyclers and soil stabilisers – here's how they work.

Soil stabilisation scores top marks in comparison to soil exchange as it requires fewer truck transports, results in shorter construction times, saves resources and reduces CO2 emissions. When operating as a soil stabiliser, the WR uses its powerful milling and mixing rotor to mix pre-spread binders, such as lime or cement, into the existing, insufficiently stable soil at working depths of up to 560 mm to convert it into a construction material of high quality in an in-situ process. The resulting homogeneous soil-binder mixture offers high tensile strength, compressive strength and shear strength values as well as long-term water resistance, frost resistance and volume stability. Typical applications include the construction of paths, roads, motorways, foundations, parking lots, sports grounds, industrial parks or facilities, airports, embankments, backfills or landfills.

Wide range of applications
Automated features for efficient operation
Precise metering systems for binder addition
Efficient engine and diagnostic systems
Perfect visibility concept and comprehensive camera system
Perfection in ergonomic design and handling
Outstanding all-terrain mobility
High milling and mixing performance
Steering system tailored to field requirements
  • Lime improves the paving properties and compactability of wet, cohesive soils. This process is referred to as soil improvement.
  • Cement increases the bearing capacity, volume stability and resistance to water and frost on a sustained basis. This process is referred to as soil stabilisation.
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Homogenisation

For homogenisation, the WR uses its powerful milling and mixing rotor to granulate and scarify the existing soil without added binders. The homogenised soil mixture is graded by a motor grader and then compacted by different HAMM rollers.

Soil stabilisation with added lime

For soil stabilisation, binder is pre-spread in a first step by the all-wheel driven Streumaster. Following behind the binder spreader, the WR uses its powerful milling and mixing rotor to mix the existing soil and pre-spread binder. The resulting homogeneous soil mixture is graded by a motor grader and then compacted by different HAMM rollers.

Soil stabilisation with added cement

For the production of a new cement-treated base layer, cement is pre-spread in a first step by a Streumaster towed spreader, which is followed by a water tanker truck. The WR then uses its powerful milling and mixing rotor to mix the existing material and pre-spread cement. Water is simultaneously injected into the mixing chamber via an injection bar. The resulting homogeneous base course material is graded by a John Deere motor grader and then compacted by different HAMM rollers.

Range of applications

The finely tiered WIRTGEN WR model series offers the perfect solution for each type of job in soil stabilisation and cold recycling.

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