National Highways is testing a pioneering graphene-enhanced asphalt on the A12 in Essex.
- The asphalt product, Gipave, is developed by Iterchimica and Directa Plus, utilising graphene for enhanced durability.
- This trial section integrates a record 40% reclaimed asphalt content in the UK for graphene-enhanced surfaces.
- The trial aims to improve road longevity, potentially reducing whole-life costs by up to 32%.
- Observation and analysis over several years will determine its broader applicability and performance.
National Highways has initiated an innovative project in collaboration with AtkinsRéalis, trialling a new graphene-enhanced asphalt on a segment of the A12 road in Essex. This material, called Gipave, is a product of Italian companies Iterchimica and Directa Plus. It has been applied to a 1km stretch of the road between Hatfield Peverel and Witham.
This groundbreaking asphalt includes 40% reclaimed asphalt, marking the highest level for such a material in the United Kingdom. Although initial costs are higher, the strength and durability provided by the graphene content may lower whole-life expenses by an estimated 32%, enhancing the road’s longevity.
The trial is part of National Highways’ SPaTS 2 programme, which focuses on developing low-carbon asphalt products. A comparative analysis with a control section of standard polymer-modified bitumen asphalt is being conducted to assess its technical performance. This evaluation is essential for considering its future use on a wider scale.
The project’s broader objective aligns with National Highways’ commitment to enhancing road safety, user experience, and environmental sustainability. Senior pavement advisor Umesh Parajuli emphasised the importance of such initiatives in contributing to the organisation’s goal of achieving net zero in construction and maintenance by 2040.
Consulting engineer AtkinsRéalis is overseeing the technical assessments, aimed at understanding the material’s viability. Michael Wright, AtkinsRéalis technical director, noted that the trial marks significant progress towards advanced road construction in the UK, potentially setting a benchmark for future sustainable infrastructure development.
This operation not only highlights considerable strides towards innovative engineering but also echoes a commitment to establishing a more sustainable circular economy. Directa Plus CEO Giulio Cesareo stated the trial’s success could validate Gipave’s effectiveness in enhancing road durability and environmental sustainability.
The trial of Gipave on the A12 could pave the way for sustainable road construction, promising improved durability and cost-efficiency.
