What is the function of rebar in reinforced concrete?

Rebar, or reinforcing bar, serves a crucial role in reinforced concrete by carrying tensile loads that the concrete alone cannot withstand effectively. Concrete is strong in compression but relatively weak in tension, which makes it prone to cracking when subjected to tensile stresses. The inclusion of rebar addresses this weakness by absorbing and distributing tensile forces throughout the structure.

When subjected to loads, the rebar works in conjunction with the concrete, allowing the composite material to handle a variety of stresses and reducing the risk of cracking. This integration provides enhanced durability and structural integrity, ensuring that the concrete can perform effectively over its intended lifespan.

The other choices do not accurately describe the primary function of rebar. Decorative elements do not contribute to structural integrity, while sound insulation and thermal conductivity are not relevant to the mechanical functions that rebar provides in the structural composition of concrete.