Project Summary
We are developing a revolutionary bio-binder made from sulphur (abundant in nature and petrochemical by-products) using an inverse vulcanisation process. This novel material is designed to fully replace bitumen in road construction, operating at lower temperatures (~50?°C) while enhancing durability and climate resilience. Scalable and compatible with existing equipment, the technology offers a transformative pathway to decarbonise transport infrastructure and enable swift industry adoption.
Project Achievements
During the TRIG programme, the team undertook a structured programme of laboratory testing, material optimisation, and stakeholder engagement. Key activities included refining the binder formulation to suit road applications, evaluating its rheological and mechanical behaviour, and benchmarking performance against conventional bitumen. The project also involved early-stage manufacturability assessment and discussions with industry partners to understand adoption barriers and opportunities. Alongside the technical work, the team developed a draft commercial and deployment plan, supported by lifecycle thinking, to ensure the innovation aligns with real-world construction practices and policy priorities.
Conclusions
The project demonstrates the strong potential of sulphur-based bio-binders to support lower-carbon road infrastructure without requiring radical changes to existing construction processes. By valorising widely available by-products, the innovation contributes to resource efficiency, supply chain resilience, and cost stability. The outcomes support national decarbonisation goals while strengthening the UK’s capability in sustainable materials innovation. Beyond technical performance, the project has helped build confidence among stakeholders that alternative binders can be credible, scalable, and compatible with current standards, supporting a more inclusive transition to greener infrastructure.
Next Steps
The next phase will focus on scaling and validation, including mixture-level performance validation, pilot-scale production, extended durability testing, and field demonstrators in collaboration with delivery partners. Engagement with standards bodies, asset owners, and contractors will be expanded to support specification development and future trials on live road networks. Parallel work will refine the business case and routes to market, ensuring the technology can move efficiently from innovation to implementation. These steps will position the sulphur-based bio-binder for wider adoption across the UK and international road infrastructure sectors.
