The operating principle of soil stabilization

The modern cold recyclers and soil stabilizers - here's how they work

  1. Perfection in ergonomic design and handling

    Intuitive operating concept and outstanding ergonomic design for high machine productivity.

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  2. Perfect visibility concept and comprehensive camera system

    The operator is additionally supported by a perfect visibility concept and intelligent camera system.

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  3. Automated features for efficient operation

    Numerous automated features ensure highly efficient operation.

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  4. High milling and mixing performance

    Our expertise and experience of many years for maximum milling and mixing performance.

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  5. Wide range of applications

    Finely tiered WR model series for a wide range of applications in soil stabilization and cold recycling.

  6. Steering system tailored to field requirements

    Steering systems tailored to field requirements for maximum flexibility on the construction site.

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  7. Efficient engine and diagnostic systems

    High-powered engine and high-tech diagnostic systems for maximum operational availability.

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  8. Outstanding all-terrain mobility

    Unrivalled all-terrain mobility for maximum performance in particular in soil stabilization.

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  9. Precise metering systems for binder addition

    Reliable, high-precision metering systems for improved mixing quality.

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Soil stabilization 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 stabilizer, 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.

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

To cold recycling

  • 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 stabilization.

Homogenization

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

Soil stabilization with added lime

For soil stabilization, binder is pre-spread in a first step by the all-wheel driven Streumaster SW 19 SC “Rhino”. 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 stabilization with added cement

For the production of a new hydraulically bound 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 motor grader and then compacted by different HAMM rollers.

Market-leading and cutting-edge products for the Road and Mineral Technologies business sectors are constructed at the WIRTGEN brand headquarters in Windhagen, Rhineland-Palatinate. With its innovative, high-performance and cost-efficient products and technologies for cold milling, soil stabilization, hot and cold recycling, concrete paving and surface mining, WIRTGEN leads the world market in road construction and repair, as well as in mining natural rock and pay minerals.

© 2017 WIRTGEN GmbH