Wirtgen WR 2400 worked as Soil Stabilizer, High tech injection, Milling and Mixing Rotor

WR 2400 from Wirtgen

The newly developed WR 2400 is a compact all-rounder based on the well-proven concept of the WR 2000. When used for soil stabilization, the WR 2400 works its way even through the most difficult terrain due to its powerful all-wheel drive and high reserve capacity. For cold recycling, the customer can choose from a full range of options: The WR 2400 restores damaged road pavements to stable layers of high bearing capacity by mixing in liquid or powdered binding agents. The WR 2400 offers the international working width of 2.40m and is capable of milling and recycling to a depth of up to 50cm.

WR 2400 from WirtgenWR2400
High-Tech injection systems for the precise metering of binding agents: The systems use microprocessor control to process water, emulsion, foamet bitumen or cement slurry during the cold recycling operations

With the newly developed WR 2400, the product range of soil stabilizers and cold recyclers comprises a total number of eight machine models plus the mobile cold recycling mixing plant KMA 200. The self-propelled, wheel mounted soil stabilizers and recyclers include the WR 2000, WR 2400, WR 2500 S and WR 2500 SK, offering customers a finely graded range of machines with common working widths and well-adjusted engine ratings. Track mounted machines purely used for cold recycling include the 2200 CR as well as the high-performance recycler WR 4200, which operates in Southern and Eastern Europe and was introduced into the US American market in 2004. The comprehensive product portfolio offered by Wirtgen GmbH is completed by the tractor-towed stabilizer models WS 2200 and WS 2500.

Soil Stabilization

Soil stabilization can specifically modify the properties of soils with poor bearing capacities in order to enable them to be compacted. This is affected by using cold recyclers which mill the existing soil and mix in a binding agent, such as lime or cement, at the same time. With its powerful engine rating of 420 kW, the WR 2400 possesses high reserve capacities for the treatment of difficult soils. The machine has all–wheel drive and features a high ground clearanceowing to its well–proven lifting column design with individually and hydrostatically driven wheels. This enables the WR 2400 to make headway even in very rough terrain and prevents the machine from getting stuck. The WR 2400 additionally features four different steering modes allowing excellent manoeuvrability. The all-wheel steering system with its four modes enables both the manoeuvring of tight curve radii as well as the parallel approach of kerbs or other obstacles.

A technical highlight is the WR 2400’s 4-fold full-floating lifting column system, enabling the chassis to “glide” on the surface smoothly even in case of pronounced bumps. All four lifting columns adapt to the terrain dynamically, thus enabling the smooth behavior, constant working depth and precise operation of the machine.

Cold Recycling

WR 2400 from WirtgenWR2400
The WR 2400's milling and mixing rotator with the patented quick-change toolholder system HT11. It enables the fast and easy replacement of toolholder on the milling drum

The cold recycling of damaged pavements is the most environment–friendly and also a highly economical method of road rehabilitation which saves natural resources at the same time. Cold recycling involves milling the existing pavement structure. The addition of binding agents allows a new construction material mix to be produced insitu, which then serves as a base layer or sub– base layer. This involves the 100 percent reuse of both bound and unbound layers. The WR 2400 offers a full range of equipment, enabling the various options of in-situ cold recycling to be used in everyday job site procedures. The machine is equipped with microprocessor-controlled injection systems for water, emulsion, cement slurry or foamed bitumen which precisely meter the quantities added, thus ensuring an optimum quality of the mix. The spraying nozzles of the different injection systems can be switched on or off individually. Cleaning of the nozzles is effected automatically.

Milling and Mixing Rotor

The milling drum of the WR 2400 is equipped with the patented quick-change tool holder system HT11. A main feature characterizing this well-proven system is that the tool holders can be replaced quickly, thus reducing downtimes of the machine. As with all recyclers of the new generation, the milling and mixing rotor of the WR 2400 is driven mechanically. This drive concept, which is successful worldwide, ensures maximum efficiency and utilizes the power of the diesel engine in the best way possible. A variable mixing chamber ensures constant quality of the mix. The larger the working depth, the larger the quantity of material to be processed in the mixing chamber. This well-conceived design enables the mixing chamber to increase correspondingly and automatically.

Ergonomic Operator’s Platform Offers Maximum Convenience

The operator’s cabin can be displaced to either side at the push of a button, providing the driver with an optimum view of the milling edge and ensuring precise and safe milling flush to kerb. The operator’s console inside the cabin (driver’s seat and control panels) can be turned continuously by upto 90°. These features ensure the non-fatiguing and convenient operation of the machine and facilitate the operator’s work on the job site. The steering wheel can additionally be adjusted in height and tilt. The driver’s ergonomic sitting position, the low design of the WR 2400 and the clear view of the operating elements enable the cold recycler to be operated easily and safely.
NBM&CW November 2008
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