How Soil Stabilization Works

How State-Of-The-Art Cold Recyclers and Soil Stabilizers Work

In contrast to complete soil replacement, soil stabilization can minimize transport logistics and conserve materials. When being used as a soil stabilizer, 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 excellent tensile, compressive, and shear strength, long-term resistance to water and frost, and volume stability. Typical applications include the construction of paths, roads, highways, routes, parks and sports fields, industrial estates, industrial facilities, airfields, dams, backfilling, and landfill sites.

Wide Range of Applications
Automatic Functions for the Working Process
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 Characterized by Powerful Milling and Mixing Performance
Field-Proven Steering System
  • The binding agent lime improves the paveability and compactability of wet, cohesive soils. This is known as soil improvement.
  • The binding agent cement permanently increases load-bearing capacity, volume stability and resistance to water and frost. This is known as soil stabilization.
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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 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 cutting process.

Parking

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

Homogenization

In the homogenization process, the WR’s powerful milling and mixing rotor granulate and scarifies the native soil without the addition of binding agents. While a Grader profiles the homogenized soil mixture that is produced, various HAMM rollers take care of the consolidation process.

Soil Stabilization with Pre-Spread Lime

In the soil stabilization process, an all-wheel-drive Streumaster binding agent 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 take care of the consolidation process.

Soil Stabilization with Pre-Spread Cement

To produce a new, cement-treated base layer, a Streumaster towed spreader deposits cement, followed by a water tanker. The WR then uses its powerful milling and mixing rotor to mix the existing 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 take care of the consolidation process.

Range of Applications

The WIRTGEN WR series features a wide range of different models to meet the needs of every soil stabilization and cold recycling application.

Learn more about cold recycling


Our Recyclers and Stabilizers in Action Around the Globe

The Next Generation of the WR Series Brings Higher Mixing Performance and Quality

The Next Generation of the Wirtgen WR Series

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

Wirtgen | Rock Crusher WRC 240(i)

The new Generation Z² cutting tools for cold recyclers and soil stabilizers from Wirtgendeliver 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 Stabilizers 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