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INTRODUCTION TO POST-TENSIONING SYSTEM
2024-06-26 17:13:07
Prestressing system is made up of a number of standard components.The basic prestressing element is the wire,strand or bar while with post-tensioning the anchors, couplers and ducts from the embedded items.
Specialist equipment for placing, stressing and grouting the tendon are required and proprietary systems have developed and become established all over the world.
ADVANTAGES
Post-tensioning allows almost ant shape of structure to be constructed, while reducing environmental impacts,
construction time,materials and costs.
* Greater flexibility of design Faster construction program
* Lower construction materials cost
* Potential for increased future loading
* Improved whole life costs and durability
* Reduced environmental impact
* Reduced maintenance costs
PC WIRES
Individual reinforcement wires or PC Wires are also used in post-tensioned beams,slabs, diaphragms etc.
The wire is cold-drawn from hot-rollers rods of high-carbon steel and stress relieved to give the required properties,
PC STRANDS
The most common form of Pre-Stressing is 7 wire Multi Strands System.The strand is made up of individual cold-drawn wires with six outer wires,twisted around an inner core wire.
The strand is stress-relived and is usually of a low relaxation grade.Strands can be galvanized where greater protection is required as per different pre-stressing applications.
