A team consisting of Avanti Highway Services, Cambridgeshire County Council and Skanska have been working together to save money and reduce the carbon impact of a new highways reconstruction scheme. The innovative techniques used by the Cambridgeshire Highways team have used materials and equipment to strengthen and reconstruct the edge of the roads on the highway using recycled products.
Peter Nicholas, Scheme Delivery Manager at Skanska explained “The road in Cambridge started to fail, which was caused by differential settlement, where the soil had expanded, shifted or contracted between the existing road and where it had been widened.
“We had to strengthen the edge of the carriageway and did this by using recycled crushed and screened cold millings as a sub-base instead of new materials. We also used hot recycled asphalt which was produced using a mobile facility adjacent to the site. This reduced the carbon emissions by 58 per cent, the equivalent of 19 tons of CO₂.”
The methods they are using has helped them to reduce their carbon footprint even further, by using these recycling methods, the team has reduced the number of vehicle journeys needed and avoided 928 tons of material going to landfill, which results in a significant decrease in fuel consumption.
Most of the material used was produced offsite close to the scheme. The material was then laid using an offset paving machine called a sidewinder, which removed the need for manual handling when laying the material, as the machine itself can discharge the material directly from the delivery vehicle straight to the paving area, simultaneous to paving the works, reducing the risk of injury.
Jon Clarke, Cambridgeshire County Council’s Highway Maintenance Manager, remarked “I was very impressed with the quality of the material being laid and the way the whole site was set up. I think we [CCC] should be looking at how we can recycle as much as possible, and I’m sure Skanska are like-minded.”
(Text originally taken from Skanska press release)