Experts are testing the addition of graphene to recycled asphalt to evaluate its effectiveness in extending the lifespan of roads.
The ultra-durable material graphene will be used to resurface the A1 road in Northumberland, BBC reported on September 13. The work is scheduled to take place from September 19 to November 1 on the northbound stretch between Newton on the Moor and West Cawledge.
The graphene recycling experiment will take place on the A1 road in Northumberland. (Photo: BBC)
Graphene has previously been mixed with plastics to reinforce new asphalt, but this is the first time in the world that this material is being added to recycled asphalt, according to UK authorities. Specifically, graphene will be mixed into the asphalt extracted from the A1 for recycling, which will then be laid back on the road surface. This experiment will help authorities determine whether graphene, a material just one atom thick, can extend the lifespan of roads.
“The benefits of graphene are transforming the industry. Graphene is stronger than steel, and adding it to other materials can turn them into super materials. From what we have observed so far, graphene can help some things last significantly longer,” Graeme Watt, manager of the state-owned company National Highways, stated. Watt also confirmed that graphene had passed laboratory tests before being considered for use in external trials.
Graphene is a carbon allotrope – one of many physical forms that carbon can take. This material consists of a single layer of atoms arranged in a honeycomb lattice. With its strength, durability, and flexibility, it shows great potential for application in various fields, such as battery technology and desalination processes, turning seawater into drinking water. If the new experiment is successful, graphene will help extend the lifespan of roads while reducing the frequency of roadworks.
The UK is also testing several other advanced construction methods for large infrastructure projects. Last month, the country announced it would accelerate the development of the HS2 high-speed rail network using 3D printing techniques with graphene-reinforced concrete. This new method enhances durability while reducing carbon emissions by 50% as it eliminates the need for steel rebar.
