Technology: Hot recycling

Efficient hot recycling – an proven method around the globe

We have been enhancing this rehabilitation method for bituminous surface courses on an ongoing basis for over 30 years. Customers appreciate the high-quality work results and low cost and material requirements.

Become acquainted with the operating principle and technical components of the hot recycling technology. Get to know the Remix and Remix-Plus paving methods, and learn more about this resource-efficient technology.

Operating principle

A modern hot recycler – here’s how it works.


Operating principle
heating machine

A modern heating machine – here’s how it works


The key benefits of hot recycling

Provided that the lower pavement layers are intact in terms of bearing capacity, hot recycling is the most economical and environmentally friendly rehabilitation method for asphalt surface courses. Many different types of surface damage extending to a depth of up to 5 cm on main traffic arteries, minor roads, motorways or airports – such as rutting, cracking, lack of skid resistance, pavement irregularities, incorrect aggregate composition or excessive bitumen content – are repaired by the high-performance machines from WIRTGEN on a large scale and in an extremely short period of time.

Hot recycling offers the most economical alternative for repairing roads.
Walter Grüber, Product Manager Recycling und Soil Stabilization – WIRTGEN GmbH

Hot recycling offers a tremendous saving potential. Around 85 % of truck transports and about 70 % of virgin mix are saved in comparison to conventional methods using milling machines and road pavers. A typical example: a 4-m wide, 10-km long carriageway is being rehabilitated, which is equivalent to a surface of 40,000 m². Assuming a weight of the surface course of 100 kg / m², about 400 truck transports would be required for the conventional method: 200 to remove the milled material from site, and another 200 to deliver the new asphalt mix. When adding the standard amount of approx. 30 kg / m², only 60 truck loads of new material are needed in total – 340 less than with conventional methods! The amount of energy needed to deliver the new construction materials is extremely small, and the process does not incur any costs related to the storage or disposal of reclaimed material.

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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.