About Concrete reinforcement placement

Reinforced concrete is concrete in which reinforcement bars ("rebars"), reinforcement grids, plates or fibers have been incorporated to strengthen the concrete in tension. The term Ferro Concrete refers only to concrete that is reinforced with iron or steel. Other materials to reinforce concrete can be organic and inorganic fibres as well as composites in different forms. Concrete is strong in compression, but weak in tension, thus adding reinforcement increases the strength in tension. In addition the failure strain of concrete in tension is so low that the reinforcement has to hold the cracked sections together. For a strong, ductile and durable construction the reinforcement shall have the following properties:

  • High strength
  • High tensile strain
  • Good bond to the concrete
  • Thermal compatibility
  • Durability in the concrete environment

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All contents of this page are taken from http://en.wikipedia.org/wiki/Reinforced_concrete