Bridge-Beam Repair

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Title: Bridge-Beam Repair

Author(s): Vikas P. Wagh

Publication: Concrete International

Volume: 8

Issue: 10

Appears on pages(s): 43-50

Keywords:

Date: 10/1/1986

Abstract:
On a concrete arch bridge rehabilitation project in Pittsburgh, a precast post-tensioned floor beam cracked six to seven weeks after grouting of the post-tensioning duct. The cracking occurred due to freezing of water trapped in the post-tensioning duct as a result of improper grouting procedures. After detailed investigation and analysis, and auxiliary support beam was constructed to take the full load in case of failure of the damaged floor beam. The experience emphasizes the importance of proper procedures in grouting of a tendon duct in post-tensioned structures.