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Reinforced concrete has reinforcing bars (called rebar) simply embedded in the pour. With prestressed concrete, reinforcing rods or cables are stretched (stressed) and then the concrete is poured around them. After the concrete hardens, the tension on the reinforcing members compresses the concrete, making it more resistant to failure where poor soil conditions or severe loads exist.

Prestressed construction is usually done in-plant because of the equipment involved, and the completed assembly shipped to the site for installation.

A similar method, called post-tension, is usually done on site, and involves the tensioning of reinforcing cables after the slab is poured, using a special hydraulic jack.

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13y ago
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12y ago

Both are methods of making concrete better at dealing with tension. Reinforced concrete is concrete that has a material that is good at dealing with tension added to it, typically steel, in the areas that are going to be subjected to tension. Prestressed concrete is concrete that is subjected to an extra compressive force, usually applied by placing a steel rod inside of the concrete that is stretched and then releasing the rod during curing thus placing the concrete beam in compression. then when the beam is exposed to tension the extra compression is negates the tension rather than the concrete being placed in tension.

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Q: What is the difference between reinforced concrete and pre stressed concrete?
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