World Quality in The Post-Tensioning Technology
POST TENSION CONCRETE TECHNOLOGY
Yapı Merkezi has been serving in post tension technology since 1988 with its group company Freysaş Which is established by Yapı Merkezi and Freyssinet partnership.
Post-tension system involves application of post-tensioning forces on high tensile steel. The material under stress forms a pressure in the concrete prior to the external loads through surface adherence and/or locking (anchorage) components at the ends.
There are two methods of post-tensioning:
1. Internal Post-tensioning:
Before casting the concrete, protective sheaths are installed on the job site. After casting the concrete, post tension cables are placed in the protective sheaths. When the concrete reaches some strength, these cables are stressed by tensile forces.
2. External Post-tensioning:
In this method, the sheaths and cables are placed outside the concrete.