The municipality of Utrecht, the Netherlands, has initiated a pilot project on Archimedeslaan using asphalt composed entirely of recycled materials. This marks the first time that Utrecht applies a fully reused asphalt mix within the city, aiming to contribute to its long-term circularity objectives.

Composition and Material Origins
The new asphalt layer is made from a combination of reclaimed asphalt sourced from various parts of Utrecht and crushed stones recovered from railway infrastructure maintenance. Bitumen, used as a binder in the mixture, originates from roofing material salvaged from the former bus depot in Utrecht, which was dismantled in 2023. All components were processed and combined locally.

This method enables the reuse of existing materials, reducing reliance on new raw resources. According to the municipality, Utrecht replaces approximately 15,000 square metres of asphalt per year. Implementing recycled material on this scale supports efforts to decrease material consumption in public space projects.

Low-Emission Implementation
The project is carried out by infrastructure company Dura Vermeer, which uses fully electric construction equipment to apply the asphalt. This approach minimises direct emissions and reduces noise levels during the installation phase.

Dura Vermeer has stated its target of reducing CO₂ emissions by 50% by 2030. According to the company, collaboration with municipalities and other stakeholders is essential to achieving such sustainability goals within the construction sector.

Relevance to Design and Material Disciplines
The use of 100% recycled asphalt may be of particular interest to professionals in landscape architecture, urban infrastructure design, and material innovation. The project offers an example of how municipal infrastructure can integrate circular material strategies without compromising operational performance.

By incorporating reclaimed elements such as roof bitumen and rail ballast into a functional road surface, the project illustrates opportunities for secondary material use in the built environment. It also highlights how design and construction processes can align with broader sustainability frameworks, such as carbon reduction and circular urban development.

Professionals working on sustainable public space, road surfacing, or material research may find the methodology and outcomes of this pilot applicable to other urban contexts.

Source: Duurzaam Ondernemen
Photo: monika1607