concrete is excellent under a compressive force and terrible under a tensile (stretching)force. Rebar is added when concrete is subjected to tensile forces.
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Steel reinforced concrete is concrete with rods of steel running through it.
Concrete can be reiforced by using steel; steel can not be reinforced
Reinforced concrete is just normal concrete with steel reinforement placed inside.
Reinforced concrete is made by placing steel bars in the tension zone of the beam x-section.
steel,cement, sand