North Staffordshire PFI Hospital – Phase 3

All the M+E network of cables and pipes are located in underground tunnels across the site, so it was necessary to construct a 250 m long tunnel to link the new CSSD block above, to the existing network of tunnels. To enable these tunnels to be constructed within a short time frame, the contractor used the twin wall system by Kerkstoel. To ensure the structures waterproof integrity, Xypex Admix waterproof concrete was used for the 160 mm thick ‘infill’ core contained between the pre cast panels. Xypex Admix was also used for the in situ slab and roof. Project specific joints were detailed which utilised Xypex Concentrate as both a slurry coat and a dry-pac, to ensure the waterproofing integrity was complete. In addition, repairs were carried out in numerous areas of the existing tunnel network where Xypex Admix hadn’t been used. Materials utilised include Xypex Patch’n Plug and Xypex Concentrate.