What is the primary purpose of using rebar in concrete?

The primary purpose of using rebar in concrete is to improve tensile strength. Concrete is very strong in compression but relatively weak in tension. This means that while it can handle heavy loads pushing down on it, it struggles to withstand forces that pull or stretch it. Rebar, typically made of steel, is embedded within the concrete to provide reinforcement. The steel bars effectively absorb tensile forces, preventing cracking and ensuring that the structure can withstand various stresses, such as those from loads or environmental changes.

Incorporating rebar significantly contributes to the overall durability and longevity of concrete structures, making it a crucial element in construction that enhances safety and structural integrity.