What is the minimum cover required between new reinforcing steel and the existing slab face during concrete deck repairs?

The minimum cover required between new reinforcing steel and the existing slab face during concrete deck repairs is 2 inches. This requirement is critical for several reasons. First, adequate cover ensures that the new reinforcement is sufficiently protected from environmental elements, such as moisture and chlorides, which can lead to corrosion. This protective layer is essential for the long-term durability of the repair.

Additionally, the 2-inch cover helps to achieve the necessary bond strength between the existing concrete and the new repair material. It allows for effective load transfer between the two components, ensuring that the reinforced area maintains structural integrity over time.

Reinforcing steel that is not adequately covered can lead to delamination or early failure of the repair, which would necessitate further work and increase costs. Therefore, adhering to the specified minimum cover is crucial in maintaining the effectiveness and safety of concrete deck repairs.