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Strengthening by External Prestressing

Performance evaluation of prestressed concrete beams with corrosion damage

Compared with conventional reinforced concrete structures, prestressed concrete structures are assumed to be more corrosion resistant because of the use of high-strength materials and the crack-free nature brought about by precompression. In spite of these advantages, stress corrosion in prestressed concrete structures can result in premature and catastrophic failure even when epoxy-coated reinforcement is used. Further, the deterioration of embedded prestressing reinforcement may not be visible as external distress in the concrete, resulting in degradation that goes undetected and unremediated until it becomes ...

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