Why is coated reinforcement used?

Coated reinforcement is primarily used to prevent rusting, which enhances the durability and longevity of concrete structures. Rusting occurs when moisture and oxygen come into contact with unprotected steel reinforcement, leading to corrosion that can compromise the structural integrity of the concrete. By applying a protective coating, such as epoxy, to the reinforcement, the risk of corrosion is significantly reduced. This protective layer acts as a barrier against moisture and other corrosive elements, thus prolonging the life of the concrete and minimizing maintenance needs.

Coated reinforcement may also offer benefits related to bond strength, but the primary motivation for its use is to inhibit rust formation. Enhanced bond strength with mortar and concrete helps in the performance of the composite material, but it does not address the critical issue of corrosion, which coated reinforcement specifically tackles. Other options mentioned, such as improving electrical conductivity or reducing costs, do not align with the primary purpose of using coated reinforcement.