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WIRTGEN Cold Recycler and Soil Stabilizer WR 240 rehabilitated a 22-km road near Hapur.Low cost and high quality are two of the most important criteria when it comes to rehabilitating roads. The WIRTGEN cold recycling train has yet another advantage: Roads can be re-opened to traffic in no time. A WR 240 cold recycler and soil stabilizer demonstrated this advantage on a 22-km-long job site near Hapur, where cars returned to the road after just 2.5 hours.The scopeIt was decided to rehabilitate the road between Hapur and Kithore using the economical and resource-saving cold recycling method. In this process, a WIRTGEN pave train mills and granulates the damaged asphalt layers, binds the material again by adding binding agent, compacts it and then directly re-paves it. This is therefore referred to as an in situ method (performed in place). This job site alone extends over more than 22 km.Worldwide proven method Another important advantage of the cold recycling method is the fast turnaround. In this case too, each rehabilitated section of the country road was re-opened to traffic after just 2.5 hours, despite the fact that the cold recycling pave train paves a sustainably durable, high-quality, cold recycled layer. At the job site near Hapur, cement was first spread onto the damaged asphalt by an SW 16 MC binding agent spreader from WIRTGEN systems partner STREUMASTER, which was followed by a tank truck that supplied the WIRTGEN WR 240 cold recycler and soil stabiliser with water. The WR 240 is equipped with the new DURAFORCE milling and mixing rotor, which thoroughly mixed the damaged layers 鈥� ie the asphalt surface course as well as the binder and base courses 鈥� together with the pre-spread cement and added water in a variable mixing chamber and then redeposited the material. A grader then took care of the profiling and various HAMM rollers 鈥� in this case a 311 D compactor and an HD 99 tandem roller 鈥� compacted the new cold recycled layer. With its new surfacing, the recycled road has a high bearing capacity and a long service life. In the final step, a conventional surface course is usually paved on top as a wearing course.Cold recycling in situOver time, increasing car and lorry traffic causes structural damage to the individual layers of asphalt carriageways and compromises their load-bearing capacity. As a recycler, the WR corrects these defects quickly, economically and without wasting resources, because it is equipped with a powerful DURAFORCE milling and mixing rotor as well as advanced injection systems. In a single pass, the cold recycler uses its milling and mixing rotor to remove the asphalt pavement, granulate it, inject precisely metered volumes of binding agent and water and then mix the material. The new base courses, which are paved in situ, boast a very high load-bearing capacity as a result. The machines in the WR series are ideally suited to applications in all performance ranges, from recycling thin asphalt layers on quiet minor roads to recycling up to 250 mm-thick asphalt layers on heavily travelled motorways.WIRTGEN DURAFORCE milling and mixing rotorFor their 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. Tried-and-tested forging process, the holder bases of the DURAFORCE milling and mixing rotor are given an intelligently designed 3D geometry using the tried-and-tested forging process. In addition to even load distribution and thus maximum stability, this process results in an optimum flow of material and homogeneous mixing of construction material.With its centre piece, the DURAFORCE milling and mixing rotor, the WR series guarantees success in cold recycling and soil stabilisation. (Communication by the management of the company)