Tees Viaduct A19 Flyover, UK
Tees Viaduct A19 Flyover is a very important structure to the region, 100,000 Vehicles a day travel over this structure, so it's important that it remains open to the public throughout the time of repairs.
THE PROJECT
The Tees Viaduct was built in 1975, and like most structures of this type, the concrete has deteriorated over time. The initial plan was demolition and rebuild of some of the piers; however, contractor CRL found an alternative—the installation of an impressed current cathodic protection system which would protect the structure for the next 80 years. As a major transport route, around 100,000 vehicles traverse the viaduct each day, so a sustainable repair method that allows it to remain open to the public is preferable. Readiness and availability of repair materials were important alongside high-quality products, giving peace of mind that the proposed solutions would work reliably and effectively.
THE SOLUTION
A collaborative teamwork approach was adopted to deliver a high-quality and sustainable solution. CRL supplied over £8.5M of specialist repair and cathodic protection works using Fosroc materials and associated technical support. A full suite of Fosroc concrete repair products was used, including hand-placed materials for localised repairs, flow-applied repair concrete for the top of the bends to create falls, and dry spray mortar. For quality control of Renderoc DS, test panels were created, cored, and sent to an independent test house/lab. The cores were crushed over three days to reveal the compressive strength, and data was matched against the required 30MPA. This enabled CRL to report back to the client with confidence that the repairs were performing. Fosroc’s ‘Carbon Calculator’ was used to measure carbon savings on CarbonNeutral® products used, including Renderoc LA and HB45.
THE BENEFITS
The project was delivered on time and within budget. Through the latest concrete repair materials and technology, the deteriorated structure has been transformed into one that will safely last for decades to come, with minimal disruption to traffic flow and the public. The solution required far less raw materials and reduced carbon dioxide emissions compared with the original demolition and repair plans, reducing CO2 for concrete elements by ~98%, steel elements 99%, and timber elements 97%. Fosroc was able to help CRL overcome unknown challenges through experience, technical resources, and 48-hour Site Support.
“Fosroc products are well-known to us, we’ve used them on multiple schemes. They’re easy to use, the technical back-up is there, and we get consistent quality. It is important to us and our clients that we get a right-first-time approach.”
— Daren King, Northern Regional Director, CRL
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