Rijkswaterstaat is the governmental agency responsible for the infrastructure in The Netherlands. Together with Dura Vermeer they are working on the recycling train ART. Which consists in a number of machines that lightly heat the asphalt, loosen (harvest), recycle and reapply it on site. 100%reuse of material less transport/pollution.
Rijkswaterstaat is part of the Dutch Ministry of Infrastructure and Water Management and responsible for the design, construction, management and maintenance of the main infrastructure facilities in the Netherlands.
Working for infrastructure projects, our ambition is to be fully climate-neutral and circular by 2030, with high-quality reuse of all materials and halving the use of primary raw materials.
That’s why we challenge the market questioning how to create a big impact on the earth with sustainable, circular and innovative measures.
Asphalt recycling train
Together with Dura Vermeer RWS is working on the asphalt recycling train the ART. The Asphalt Recycling Train (ART) is the collective name for a number of machines that remove, recycle and reapply asphalt on site. With this methodology, 100% of the material is reused in situ/ on the same place. It also achieves a significant reduction in construction traffic because asphalting no longer requires the supply and removal of materials.
The front wagon of the train of the ART involves cleaning, warming up and loosening the asphalt. The second machine remix the recycled asphalt with bitumen (glue) and the asphalt will be loosened and directly reapplied.
Rijkswaterstaat’s ambition is to work completely climate-neutral and circular from 2030. Both in its own operations and in its projects and procurement. Rijkswaterstaat is doing this together with the market and other public authorities. The pilot with the ART should lead to its wider use in the future in the maintenance world. A 100% circular measure for the entire sector.
Dura Vermeer’s ART won first prize in the Rijkswaterstaat sustainable asphalt competition. Through this prize Rijkswaterstaat encourages the market to come together with innovative and circular measures.
BAM won the second prize with 80% circular asphalt. This was a further development of LE2AP. BAM developed this innovative production method as part of the European Life+ demonstration project LE2AP.
BAM’s Asphalt Expertise Centre works continuously on innovative asphalt solutions and (improving) the quality of asphalt mixtures and pavements.
BAM’s innovative PA mixture contains stone and mastic recovered from old PA. With this BAM makes an new PA with >80% recycling. The recovered and subsequently enriched mastic is shifted so that the mixture can be produced at around 115˚C. In addition to the high reuse value, this results in a CO2 reduction of27.2 kg CO2-eq/tonand an energy reduction of about 40 percent. And even the costs of the mix are lower, up to 90%.
A second mix was designed during the research phase with 95% recycling. Both of these mixes are used in demonstration projects on the Highway network.
The third prize was won bij the contractor Heijmans 3 mixes combined in the proces; single layer PA16 with 60% recycling, TwoLayer PA16 with 60% recycling ánd the re-use of the 4/8 fraction of the RAP after seeving will be re-used in toplayer of TwoLayer PA8 forward to 40% recycling. This is combined with a bio-based rejuvenator which is pre-sprayed on the RAP before dosing in the mix to give it time to start the rejuvenating process in the RAP. All 3 mixes have proven itself in the lab and in the field, that made RWS decide to validate these as equal to conventional mixes (without RAP).
Nowadays, 2022, the production plants of BAM and Heijmans have joined forces for there R&D and production and started as the company AsfaltNU.
A new AsphaltPlant with WarmMixAsfalt Production on large scale combined with RAP is planned.
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