UK
Ireland
Scotland
London
The Nene Bridge is currently undergoing £5 million upgrade works after recent inspections found signs of structural distress and cracking to the saddles of the piers.
The improvement project involves encasing the piers in reinforced concrete jackets, to strengthen the piers and also to provide jacking platforms for the superstructure lifted to enable the bearings to be replaced. The Nene Bridge was the first bridge in the UK to deploy this method.
Lytacrete was deployed for this work as it was strong enough to strengthen the piers and to carry the jacking loads, self-compacting, able to flow around the dense reinforcement, and lightweight, to minimise the additional load on the foundations.
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The solution is a concrete mix using the innovative lightweight secondary aggregate, Lytag, which can effectively reduce the dead load by approximately 25% over normal weight control, while offering the same level of structural performance.
Aggregrate Industries will continue to support Skanska over the next year, ensuring all concrete arrives on time and to the exact specification to ensure the concrete is available to surround, rebar and form the required shape.
Simon Wycherley, General Manager at Aggregate Industries, said: "We're incredibly proud to be involved in the repair works of Nene Bridge, the first project of its kind to use our Lytacrete solution in this way. Coupled with our on-site technical expertise, we hope our innovative concrete solution ensures this iconic structure lasts the test of time."
Dan Wood, Site Manager for Skanska Infrastructure Services, added: "Lytacrete has performed well on the Nene Bridge bearings project, successfully flowing around the complex steel reinforcement to form the unique geometry required. I would like to thank Aggregate Industries for taking on board feedback and working with Skanska to refine the mix design to suit the bridge's unique requirements."
(CM/MH)
