Prestressed Concrete

Some definitions:

1. Circular prestressing: Used for ring-shaped structure and use of prestressedconcrete, such as circular tanks, silos, cheeks, etc., where the tendons diiitkan around the circle.

2. Linear prestressing: Includes all structures outside circumferential prestressing,such as beams and plates. In linear prestressing, prestressing force providedlongitudinally along or parallel to the axis of the component structure. Installation of the tendon should not be straight, but can be bent or curved.

3. Pre-pull system (Pretension): Describes a system where the tendon is withdrawnbefore the concrete casted.

4. Post-pull system (Posttention): This is the opposite of the pre-pull system, castedconcrete here first, after the concrete reaches age / specific power of the new tendonis pulled.

5. Cables: A set of tendons, or center of gravity of steel (cgs) of the entire tendon.

6. Tendons: Another name-prestressed reinforcement, can be a wire, rod, or strand(strand wires) are made ​​from high quality steel, to provide a prestressing force on theconcrete.

7. Anchor: A tool that is commonly used in post-pull system, which allows the tendonto provide and maintain the prestressing force on the concrete. Angkur commonly used is the Freyssinet system, Magnel, Dywdag, BBRV, etc..

(A. Kadir Aboe, 2006)