08-14-2014, 08:18 AM
Pre Tensioning
Pre-tensioned concrete is almost always done in a precast plant. A pre- tensioned Prestressed concrete member is cast in a preformed casting bed. The BONDED wires (tendons) are tensioned prior to the concrete hardening. After the concrete hardens to approximately 75% of the specified compressive strength f’c, the tendons are released and axial compressive load is then transmitted to the cross-section of the member.
![[Image: prestress.png]](http://www.frontdesk.co.in/big/prestress.png)
Pre-tensioned concrete is almost always done in a precast plant. A pre- tensioned Prestressed concrete member is cast in a preformed casting bed. The BONDED wires (tendons) are tensioned prior to the concrete hardening. After the concrete hardens to approximately 75% of the specified compressive strength f’c, the tendons are released and axial compressive load is then transmitted to the cross-section of the member.