Concrete that is reinforced by metal, usually steel rods or bars cast into the concrete, or by other reinforcement such as glass or metal fibres or natural materials that are strong in tension.
Includes prestressed concrete, and can be pre-cast or cast-in-place.
Reinforced concrete slab and columns under construction, Canada (S. Brzev)
Reinforced concrete building, New Zealand (A. Charleson)
Reinforced concrete wall and column retrofitted with carbon fibrewrap, USA (S. Brzev)