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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 Operating Tutorials for the WR Series
  •  Explanation of the most important machine functions and daily maintenance tasks
  •  Valid for the complete WR series
  •  Language versions: English and Spanish
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Quick Checks

You haven’t been on your WR for quite some time – here is all you need to put it into work properly.

Daily Service and Maintenance

Daily service checks, cutting tool replacement and regular cleaning intervals are shown.

Set up operators platform

Making yourself comfortable on the operators platform.

Camera / Lighting / Mirrors

Camera-system explained in operation with rear view steering assist and additional maintenance advice.

Start of cut: autmatic mode

Setting up the automatic for saving time on every lane.

Start of cut: manual mode

Step by step explanation how to bring your WR-Recycler into the cut manually.

End of cut: automatic mode

Setting up the automatic for saving time on every lane.

End of cut: manual mode

Step by step explanation of how to end the cut properly.

Parking

Walkthrough all required steps to park your WR after work is finished.

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.

To cold recycling


Our recyclers in action around the globe

The new Wirtgen Generation Z² cutting tools for cold recyclers and soil stabilisers deliver convincing performance in all materials thanks to high impact resistance, high shank breakage resistance and best-possible pick holder protection.

Generation Z²

Presentation of the new automation technology for cold recyclers and soil stabilisers at Bauma 2022

AutoTrac for the WR series

World premiere of the KMA 240(i) cold mixing plant and technology updates for the WR series

Greater sustainability processes

Soil stabilization, a process widely used throughout the world, is the ideal solution for producing compactable soil with good paving properties from a sub-base with insufficient bearing capacity.

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A WIRTGEN WR 250 soil stabilizer laid a load-bearing base for the construction of a new approach road to Interstate 69.

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Compared to replacing all of the soil, soil stabilization is cost-effective. Cost savings result from shorter construction times, among other factors.

WR 250 in Indiana

For its WR series, Wirtgen has developed a solution that is more than a match for even the most extreme requirements in both applications: the new DURAFORCE milling and mixing rotor.

A rotor for every requirement

Top quality on every job.

A small compact machine meets a powerhouse

Wirtgen have further enhanced their comprehensive range of cutting technology products.

New cutting tools