Operating principle in plant

A mobile cold recycling mixing plant – here`s how it works

The KMA 240(i) is mounted on a flatbed semitrailer and equipped with an independent powerstation. The mobile concept enables the plant to be relocated to different operating sites quickly and set up in next to no time. Wheeled loaders empty all kinds of unbound source materials into the proportioning hopper via vibrating grids. Silos and / or tankers supply the plant with binding agents such as cement, bitumen emulsion or foamed bitumen. For high-precision metering, a microprocessor-controlled system monitors the addition of source materials and binding agents into the mixing chamber. A heavy-duty twin-shaft compulsory mixer produces a homogeneous construction material of high quality. In a final step, the recycled mix is simply discharged via the slewing belt conveyor which enables even long semitrailers to be loaded to full capacity.

One-of-a-kind mobility and flexibility
Simple, intuitive operation
Maximum productivity
Effective mixing process
Optimal material flow with intelligent functions
Precise binding agent addition
Recipe for success for hard-wearing road surfaces

The KMA 240(i) cold recycling mixing plant produces cold mix that can be paved immediately for a wide variety of construction projects, such as cement-treated base (CTB) layers for freeways. Due to the particularly generous, continuous addition of cement, enormous daily outputs can be achieved with maximum precision.

In addition to CTB and RCC (roller-compacted concrete), cold mix can be produced that is stabilized with bitumen emulsion or foamed bitumen (BSM).

The road surfaces produced from these high-quality cold mixes then stand out due to their excellent bearing capacity, resistance to deformation, and long service life.

ECO-friendly technology

The highly mobile cold recycling mixing plant can be easily transported from site to site and quickly set up in the near vicinity. This saves time, truck capacity, and is also extremely environmentally friendly, making it possible to achieve up to 60% fewer CO2 emissions thanks to cold processing, a 90% reduction in transport volumes, and up to 50% lower total costs compared to conventional construction methods – in other words, an investment that pays off in every respect!

Cold recycling conserves resources and offers enormous savings potential.

The cold mix produced by the plant is internationally approved for the construction of freeways and high-quality base layers in road and path construction.

The production of cement-treated base (CTB) layers is one of the field-poven standard construction methods.

Compact transport dimensions

The well-engineered design allows the compact system to be easily and safely “packed up” onto a flatbed truck trailer and transported to the next site, saving both time and money. All you need to do is swivel in the discharge conveyor and operator’s cabin, move the cement charging auger to the transport position, and then hitch up the plant. A common truck is completely sufficient for transporting the plant as all of its connectors are standardized.

The compact transport dimensions and low overall weight of the KMA 240(i) comply with international traffic regulations, eliminating the time-consuming process of applying for special permits in most locations.

The machine can be transported via a standard truck without a special permit.

Extend the hydraulically operated supports.

Fold out the front supports manually.

Bring the operator’s cabin into position at the push of a button.

Extend the discharge conveyor hydraulically.

The plant is ready for operation after a short set-up time.

Mix production at a rate of over 240 t / h

At first glance the KMA 240(i) appears comparatively small. But when it comes to performance, the exact opposite is true – the compact machine packs a punch. Powered by a heavy-duty diesel engine, it can produce high-quality mix at an astonishing rate of 240 t / h. This mixing capacity even far exceeds that of many stationary large-scale plants.

But it doesn’t just come down to performance, a continuous supply of materials to the job site is also crucial.

This is guaranteed by the field-poven loading system of the KMA 240(i). The discharge conveyor features wide swing angles that make it possible to evenly fill semitailer trucks.

With a capacity of 240 t / h, the machine produces a full truckload of 20 tons of mix every five minutes This means that, for example, an enormous section of a cement-treated or bituminous bound base layer 4.0 m wide, 15 cm thick, and 1.4 km long can be paved every day.

Optimal material flow with intelligent functions.

The main components of the plant – the material hopper, dosing units, and twin-shaft continuous mixer – mesh together perfectly, ensuring that the binding agents are added to the raw material weighed in the mixer precisely and simultaneously. The end result is a mix quality that precisely matches the required recipe.

Gravimetric cement dosing via innovative double trough system

The innovative double trough system features two independent, state-of-the-art weighing units. This allows cement to be dosed gravimetrically from one trough while the other trough is simultaneously being filled with more cement and precisely weighed. The alternating dosing process is carried out with the utmost precision and without interrupting the addition of binding agent.

Our recyclers in action around the globe

Powerful and sustainable: Wirtgen’s KMA 240(i) cold recycling mixing plant is a powerful and environmentally friendly machine capable of loading a 20-ton truck with high-quality cold mix every five minutes.

Wirtgen KMA 240(i) Cold Recycling Mixing Plant

In autumn 2017, parts of the flight operations areas at Cologne/Bonn Airport were renovated. The mobile cold recycling mixing plant from Wirtgen prepared the material mix.

Recycling at Cologne/Bonn Airport

The key role was played by Wirtgen cold recycling technologies. In action: the mobile cold recycling mixing plant KMA 200.

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Today, Wirtgen is the market leader on a global scale, offering a range of 9 machines and plants for in-situ or in-plant cold recycling applications.

Mobile mixing plant design continues on the road of success