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Contractors World International - 2017 Vol 8 No 3

 

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Developments on Cold Recycling with Foamed BitumenDevelopments on Cold Recycling with Foamed Bitumen - continued

Cold recycling with foamed bitumen on USA highway: this method for the rehabilitation of roads is not only highly cost-efficient in the total cost calculation but also produces high-quality, durable base layers.

Cold recycling with foamed bitumen on USA highway: this method for the rehabilitation of roads is not only highly cost-efficient in the total cost calculation but also produces high-quality, durable base layers.

Resource-saving technologies are more in demand than ever before. They do not necessarily have to be revolutionary. Most times, they can be a simple adaptation of a proven system.

One such examples is the Wirtgen cold recycling process that has been proving its credentials for many years – and already meets the demands of tomorrow.

Advancing technology means that it is also constantly evolving. As such, it is worth revisiting to see just what the system can deliver.

Recycling Maximum Amount

Roads that are subjected to continuous and heavy traffic often show signs of damage that extend down to the road base. In such situations, to eliminate this damage, the entire road needs structural rehabilitation. Full re-use of the milled material as well as its cost-effective treatment make cold recycling with foamed bitumen environmentally friendly and economical.

Asphalt road rehabilitation with mobile road works

Cold recycling with foamed bitumen as a binding agent is a globally established process that is attracting increasing interest from road construction authorities and construction companies for asphalt road rehabilitation. It permits the paving of flexible and durable base layers. As part of the pavement structure, these form the perfect foundation for the final, thinner asphalt surfacing.

State-of-the-art technology is used to produce foamed bitumen from normal bitumen which has been heated to approximately 175°C.

Addition of foamed bitumen and water to mineral aggregate by means of separate injection systems.

   With the in-situ method, a precisely dosed quantity of binding agent is added to mineral aggregate inside the Wirtgen 2200 CR or 3800CR cold recycler or the soil stabilizers of the WR series, using microprocessor-controlled injection systems.

The project can hence be carried out as a mobile road works site.

Addition of foamed bitumen and water to mineral aggregate by means of separate injection systems.

 

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