Prestressed concrete beams may be under-strength because of deficiencies in design, increases in applied loads, loss of prestress, damage due to the effect of collision, corrosion or military operations and salt damage. There has been limited research on the repair of PC bridge girders. Carbon laminates can solve a wide variety of structural problems due to environmental exposure, inadequate design and heavy traffic. Because they are impermeable, the laminates resist moisture and the resulting corrosion. An added advantage of carbon laminates is their ease of installation due to their extremely light weight compared to steel or concrete. This paper describes the strength enhancement provided to the flexural capacity of prestressed concrete girders by the external bonding of CFRP laminates through a large scale beam study. Seven half scale standard CPCI 900 mm pretensioned bridge girders comprising two nonreinforced and five reinforced by CFRP were considered in this study.
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