M5 Junction 13 to 14 Coaley Cambridge Bridge
Part of our ongoing programme of work to maintain England's strategic road network
Where was the project located?
The scheme involved structural concrete repairs to the verge piers and foundation of the bridge at Coaley Cambridge, Gloucester.
Why was the scheme needed?
Structural repairs were carried out to the piers and foundation of the bridge because of the presence of thaumasite which is a form of sulphate attack on concrete. Thaumasite is formed when sulphates diffuse into concrete from adjacent ground. The cement paste becomes incohesive mush which is removed by hand. The presence of thaumasite reduces the binding ability of the concrete, resulting in a loss of strength and integrity of the concrete.
What work was carried out?
The works have strengthened the bridge.
How did this benefit road users?
The repairs have strengthened the bridge and will now avoid the need for further repairs.
How do I find out more information ?
If you have any queries about this project you should contact the Highways Agency Information Line by emailing firstname.lastname@example.org or calling 0300 123 5000.