Bio‑based binders in asphalt: Summary note
Publication Year
2026
Document Status
Current
Abstract
An overview of bio-based binders used in asphalt, explaining how biomass-derived and waste-based materials can partially replace conventional petroleum-based bitumen to reduce the carbon footprint of road construction and maintenance. It outlines the key types of bio-based materials, relevant technical standards, performance considerations, environmental benefits, and the challenges associated with specification, quality assurance, and long-term durability. The document concludes that while bio-based binders show significant potential for supporting lower-carbon highways and increasing the use of renewable resources, continued testing, monitoring, and robust lifecycle assessment are essential to ensure they deliver sustainable whole-life performance.
Document History
Published: April 2026.
Publisher Information
Association of Directors of Environment, Economy Planning and Transport
Represents Place directors from county, unitary and metropolitan authorities, along with Local Enterprise Partnerships and Corporate Partners drawn from key service sectors. ADEPT members are at the very heart of maximising sustainable growth in communities throughout the UK. We are delivering the projects that are key to unlocking broader economic success and creating more resilient communities, economies and infrastructure.
