 A thicker cover or a more compact concrete will also reduce the diffusion of CO2 in the concrete, protecting it better from carbonatation and maintaining a higher pH for a longer time period, increasing so the rebar service life.Concrete covers are frequently used in the construction of commercial developments, homes, bridges, municipalities, curb forming, and other locations or projects requiring long-lasting, durability.Concrete and steel reinforcement bars combine to create strong, resilient structures in the following ways