Taking the Strain
Designed by Ove Arup the bridge features low slung suspension wires that make the bridge seem, intriguingly, to defy gravity. This seemingly light aesthetic design disguises the fact that the same if not a greater load than traditional designs needs to be safely transferred to the supporting structure.
Arup specified technical mortars from the Weber range, which were chosen for their performance record in use over a long period of time, in several key areas.
Materials from the Five Star range were selected for the project. Five Star grout SP supports the full weight of the structure via the bearings to column piers. Five Star repair concrete was used as the concrete to the caisson plinths while webercem duct grout was used extensively in grouting MaCalley bars. These high performance slightly expansive precision grouts feature non-metallic chemistry so avoiding potential dimension instability, corrosion or staining in the future. The Five Star products develop extremely high strengths and were originally developed to comply with DoT specifications for bridges etc. for highways use. webercem duct grout fully meets the special requirements of clause 8 of the Concrete Society Technical Report No 47 Durable Bonded Post-Tensioned Concrete Bridges and Highways Agency requirements for special gouts used in bonded post-tensioned structures.