The HS2 Skanska Costain STRABAG joint venture has secured extra funding to trial repurposed London Clay as a low carbon alternative to cement. The JV is working with Arup, Tarmac, the University of Leeds and Sika UK along with Expedition Engineering and the Mineral Product Association on the trial funded by Innovate UK to help accelerate the decarbonisation of the concrete industry.
The team is continuing to develop the replacement of carbon intensive Portland Cement with repurposed London Clay from site excavation work. By calcinating (heating to activate) London Clay excavated from the tunnel activities the team is using it as a replacement for Portland Cement in concrete for the HS2 permanent works.