Operating Principle of In-Situ Cold Recycling

How the WR series of state-of-the-art cold recyclers and soil stabilizers work

The WR is equipped with a powerful milling and mixing rotor as well as state-of-the-art injection systems. The cold recycler uses the milling and mixing rotor to mill asphalt pavements, granulates them, sprays binder and water in precisely measured doses, and mixes it all together in a single operation. The new base layers produced on site then stand out thanks to their exceptional bearing capacity.

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
Recycling with Pre-Spread Cement

To produce a cement-treated base layer, a Streumaster binding agent spreader first spreads a layer of cement, followed by a water tanker. The WR’s powerful milling and mixing rotor granulates the damaged layers. At the same time, cement and sprayed water are mixed in. While a grader carries out the fine profiling of the homogeneous building material that has been prepared, various HAMM rollers compact it.

Recycling with Pre-Spread Cement and Bitumen Emulsion

A Streumaster binding agent spreader dispenses small quantities of cement, followed by a water tanker and an emulsion tanker. The WR’s powerful milling and mixing rotor granulates the damaged layers. At the same time, the pre-spread cement is mixed in and emulsion and water are sprayed into the mixing chamber via two separate microprocessor-controlled injection bars. While a grader carries out the fine profiling of the homogeneous building material that has been prepared, various HAMM rollers compact it.

Recycling with Cement Slurry and Foamed Bitumen

A bitumen tanker truck leads the way, followed by a slurry mixer. Bitumen tankers and slurry mixers supply the WR 240/WR 240i, WR 250 with the binding agents necessary to process the pavement in need of rehabilitation. The recycler’s powerful milling and mixing rotor granulates the damaged layers. At the same time, foamed bitumen and water-cement slurry are sprayed in via two microprocessor-controlled injection bars. While a grader carries out the fine profiling of the homogeneous building material that has been prepared, various HAMM rollers compact it.

Further Applications

WR 240: Recycling with pre-spread cement and bitumen emulsion

WR 240: Cold recycling with cement slurry

WR 240: Cold recycling with cement slurry and emulsion


Range of Applications

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

View Soil Stabilization
Our Recyclers in Action around the Globe

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

World Premiere of the KMA 240(i) Cold Mixing Plant and Technology Updates for the WR Series

Greater Sustainability Processes

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

At Conexpo-Con/Agg 2017 in Las Vegas, Wirtgen is exhibiting the full-lane 3800 CR cold recycler.

World Leader in Cold Asphalt Recycling Technology

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

The first WR 250 delivered to Italy was put to work on the A4 Turin-Trieste highway, one of the busiest roads in Europe, and it turned out to be exceptionally productive.

Marking a first in Italy

The same situation at five very different job sites: the Wirtgen WR 240i handles soil stabilization and cold recycling with ease.

Top quality on every job