How soil stabilisation works

How state-of-the-art cold recyclers and soil stabilisers work

In contrast to complete soil replacement, soil stabilisation can minimise transport logistics and conserve materials. When being used as a soil stabiliser, the WR uses its powerful milling and mixing rotor to mix pre-spread binding agents such as lime or cement into the existing, insufficiently stable soil to working depths of up to 560 mm and convert it into a high-quality construction material in-situ. The resulting homogeneous mixture of soil and binding agent offers outstanding tensile, compressive, and shear strength, long-term resistance to water and fros and volume stability. Typical applications include the construction of paths, roads, highways, routes, parks and sports grounds, industrial estates, industrial plants, airfields, dams, backfilling, and landfill sites.

Wide range of applications
Automated functions for efficient operation
Exact dosing systems for binding agents
Efficient engine management and diagnostic systems
Optimum visibility and comprehensive camera/monitor system
Perfect ergonomics and operating concept
Outstanding all-terrain mobility
The WR series is characterised by powerful milling and mixing performance
Field-proven steering system
  • The use of lime as a binding agent improves paveability and compactability of wet, cohesive soils. In this case, we use the term soil improvement.
  • The use of cement as a binding agent permanently increases load-bearing capacity, volume stability and resistance to water and frost. In this case, we use the term soil stabilisation.
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 Operating tutorials for WR series machines
  • 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 Reference Guide

If you haven’t worked with a WR machine for some time, here’s a quick overview of the maintenance and inspection points.

Daily care and maintenance

Shows explanations of daily maintenance tasks, changing picks and cleaning intervals.

Adjustments & settings in the operator’s cabin

Setting up the comfort workplace in the operator’s cabin of WR machines.

Camera / lights / mirrors

Explanation of the additional camera/monitor system with steering angle indicator.

Positioning the machine in the cut: Automatically

Setting-up the automatic function saves time with each single cut.

Positioning the machine in the cut: Manually

Step-by-step explanation of how to manually position WR machines for the milling process.

End of cut Automatically

Setting-up the automatic function saves time with each single cut.

End of cut Manually

Step-by-step explanation of how to manually end the milling process.

Parking

All steps to be observed for safely parking WR machines after work.

Homogenisation

In the homogenisation process, the WR’s powerful milling and mixing rotor granulates and scarifies the native soil without the addition of binding agents. While a Grader profiles the resulting homogenised soil mixture, various HAMM rollers follow on behind and compact it.

Soil stabilisation with lime as a binding agent

In the soil stabilisation process, an all-wheel-drive Streumaster spreader pre-spreads the binding agent. Behind the binding agent spreader, the powerful milling and mixing rotor of the WR homogeneously mixes the existing soil with the pre-spread binding agent. While a Grader profiles the processed soil mixture, various HAMM rollers follow on behind and compact it.

Soil stabilisation with cement as a binding agent

To produce a new, cement-treated base layer, a Streumaster towed spreader deposits cement, followed by a water tanker. The WR’s powerful milling and mixing rotor homogeneously mixes the material and the pre-spread cement. Water is simultaneously injected into the mixing chamber via an injection bar. While a John Deere Grader profiles the processed base layer material, various HAMM rollers follow on behind and compact it.

Range of applications

The WIRTGEN WR series features a wide range of different models to meet the needs of all soil stabilisation and cold recycling applications.

Learn more about cold recycling


Our recyclers and stabilisers in action around the globe

The next generation of the WR series delivers higher mixing performance and quality

The next generation of the Wirtgen WR series

The Wirtgen Rock Crusher enables the crushing, processing, and homogenisation of hard core, concrete fragments, cobblestones and stony ground.

Wirtgen | Rock Crusher WRC 240(i)

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

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