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Applications in earthworks, road construction and material processing can be solved profitably by our technologies. We explain how it works.
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The WIRTGEN GROUP is an internationally operating group of companies in the construction equipment industry. Find out more about our production and where you can find us.
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Sustainability is an integral part of our corporate principles. We know that the future belongs to climate-friendly products. We’re already manufacturing them today.
Sustainability

Asphalt production

The secret’s in the mix! — A thermal mixing process is required before aggregates and bitumen can be turned into asphalt for road construction. This makes an asphalt mixing plant essential. Whether movable or fixed: with made-to-measure solutions from BENNINGHOVEN, the specialists for asphalt mixing plants, every mixture is a success.

Batch-mode asphalt production

In BENNINGHOVEN plants, the asphaltic mixture components (minerals, bitumen, filler) are weighed precisely beforehand and then discontinuously mixed by an asphalt mixer in batches according to the formulation. This process is the most flexible as it means changes to the mixing formulation can be made for each batch. In addition, more exact feed quantities and adjusted mixing times or cycles can also achieve a higher final quality for the mixture.

Asphalt temperatures in construction

Hot asphalt – reduced-temperature asphalt – cold asphalt

In asphalt road construction, the mixture temperature is of prime importance for installation quality and the resulting period of use for the road itself. The development and deployment of a series of new technologies and procedures has caused both economic and ecological aspects to predominate here, so as to meet requirements in terms of contemporary legislation and the demands of specialized areas of application.

Batch-process asphalt production

Hot asphalt

To be processed, hot asphalt needs to have a temperature of at least 160 degrees Celsius. Since the mixture must not cool down on the route from the asphalt plant to the place of use, a complex transport chain involving special vehicles is necessary. The need for these special-purpose vehicles means hot asphalt is generally economically unsuitable and unviable for small repairs.

Reduced-temperature asphalt

The main difference to conventional hot asphalt is the processing and installation temperature. In figures, that means a temperature reduction of 20–40 °C. Some of the accompanying effects in production and use include an improved total energy balance, for example, as well as a reduction in emissions during manufacturing and lower figures for workplace exposure levels when installing the asphalt.

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Cold asphalt

Cold mixes are manufactured using unheated aggregates and bitumen emulsion or foam bitumen (EAPA). Unlike hot asphalt, cold mix asphalt can also be stored before installation. When packed in air-tight containers, cold asphalt can stay ready for immediate processing even after months of storage. Cold asphalt only starts curing when it comes into contact with ambient air. All of these properties make cold asphalt ideal as a patch material for smaller-scale repairs.

Sustainability by Benninghoven

Working more efficiently with sustainable and economical technologies is the challenge of today and tomorrow. Benninghoven offers a variety of innovative solutions for increasing sustainability in asphalt production.

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BENNINGHOVEN technologies

Asphalt production, recycling systems, combustion technology, control systems, and bitumen technologies – thanks to BENNINGHOVEN’s technologies, each of our customers can find the right solution for their specific site that fully complies with requirements and conditions.

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