Inspection of Unbonded Tendons


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Title: Inspection of Unbonded Tendons

Author(s): Daniel W. Falconer and Philip W. Wilson

Publication: Concrete International

Volume: 10

Issue: 2

Appears on pages(s): 53-56

Keywords: beams (supports); concrete slabs; foundations; inspection; post-tensioning; prestressed concrete; unbonded prestressing; Construction

Date: 2/1/1988

Post-tensioning delivers an active force. When post-tensioning strands are improperly placed, the active force can result in local failures such as blowouts or breakouts where the strand actually pulls through the concrete. These and other problems are dangerous when they occur and very difficult and expensive to repair. Many of these problems can be prevented by good inspection.