Mixed-in-plant process

When mixing in-plant, reclaimed asphalt pavement and crushed stone are transported to a mixing plant located in the vicinity of the construction site. Here the milled material is mixed with binders to produce a new construction material mix which is reused either on the same or on a different construction site.

In-plant processing becomes attractive when:

  • Additional pavement layers are required. Inplant processing is usually preferred where previously-stockpiled material recovered from existing pavements can be recycled and used to construct a new pavement layer. Material treated with a bitumen stabilising agent can also be placed in stockpile for later use.
  • different materials are to be blended in accurate proportions
  • the material in the existing pavement is highly variable and requires a process of selection
  • the material in the existing pavement is so hard that it cannot be properly pulverised in situ.
  • 100% reuse of asphalt material
  • Structural rehabilitation down to the deeper layers
  • New construction from recycled mixes
  • Material can be reclaimed and paved independent of location

High-performance twin-shaft compulsory mixer

The mobile KMA 220 / KMA 220i cold recycling mixing plant is equipped with a powerful twin-shaft compulsory mixer to produce fully homogeneous recycled mixes. The mixer is fitted with mixing arms and mixing blades arranged in a specific pattern and manufactured from highly wear-resistant carbide metal. The mixing vessel is lined with special wear plates.

The mixing blades and interior of the compulsory mixer are manufactured from highly wear-resistant material. The mixing blades allow independent adjustment and can be replaced individually. All plant components, including the mixer, are driven hydraulically via a powerful diesel engine. The robust twin-shaft continuous mixer is undoubtedly a highlight, having a homogeneous mixing capacity of 220 tonnes per hour.

Market-leading and cutting-edge products for the Road and Mineral Technologies business sectors are constructed at the WIRTGEN brand headquarters in Windhagen, Rhineland-Palatinate. With its innovative, high-performance and cost-efficient products and technologies for cold milling, soil stabilization, hot and cold recycling, concrete paving and surface mining, WIRTGEN leads the world market in road construction and repair, as well as in mining natural rock and pay minerals.