The environmentally-friendly process was used to construct a new cycle path being built for Birmingham City Council as part of the Bromford Flood Alleviation Scheme.
Early calculations show the new low carbon foamed asphalt path, made from recycled aggregates and processed waste products, could bring CO2 savings of up to 90% compared with using a traditional hot AC20 asphalt mix.
Jackson’s supply chain manager Andy Lusher said: “The cycle path provided an opportunity to look at the original design and ask ourselves how we could do this in a more carbon-friendly way. We brought our supply chain together to use their expertise and come up with a solution that was truly innovative.”
Partners on the trial scheme include O.C.O Technology Ltd, who has developed a carbon negative aggregate made from waste material from the treatment of flue gases from Energy from Waste (EfW) plants. This is the first time it has been used in a foamed asphalt application.
“With Zero Carbon being a global target, the construction industry must source alternative, more sustainable products, to not only reduce the carbon footprint but to preserve the finite reserves of natural aggregate in the UK,” said Stephen Roscoe, O.C.O’s technical director.
Surfacing specialist Toppesfield has been central to the project. Its team took the O.C.O product and mixed it with ToppFoam, its own cold foamed bitumen asphalt that incorporates recycled aggregates that would normally go to landfill. On the back of the success of this trial, the company has opened a new aggregate recycling facility in Birmingham, so it can be closer to projects in the Midlands region.
Toppesfield’s technical director Paul Phillips said: “Working on the Bromford project has given us an opportunity to look at where we can reduce carbon in our operations further.
“Our strength and resilience tests show the new cold foam mix is fit for purpose and as we strive towards Net Zero, we expect it to become the surface mix of choice for future path and light use road construction projects.”