What material is commonly used to enhance the strength of concrete in construction?

The choice of rebar, or reinforcing bar, as the material commonly used to enhance the strength of concrete in construction is based on its proven ability to improve the tensile strength of concrete structures. Concrete has excellent compressive strength but is relatively weak in tension. By embedding rebar within the concrete, the overall structural integrity is significantly improved, as the rebar absorbs and distributes tensile forces that concrete alone cannot withstand effectively.

Rebar is typically made of steel, which has a high tensile strength, providing the necessary support to withstand bending and stretching forces. The interlocking surface of the rebar allows it to bond well with the concrete, creating a composite material that performs better than either material used alone. This synergy between concrete and steel rebar is why it has become a standard practice in construction to use rebar for reinforcing concrete structures, such as beams, slabs, and columns.