United States Department of Transportation
i
Performance Evaluation of Glass Fiber Reinforced Polymer (GFRP) Reinforcing Bars Embedded in Concrete Under Aggressive Environments [Summary]
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2019-04-01
[PDF-219.72 KB]
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Abstract:Many concrete structures in Florida are reinforced with steel bars. Combining concrete and steel produces extremely strong structures that would not be possible with concrete alone. However, in Florida’s humid environments, moisture or salt can penetrate the concrete over a number of years and cause the steel to corrode. This can cause the concrete to crack or reduce the strength of the steel, weakening the structure. Regular inspection prevents this situation from leading to structural failure, but annual maintenance and repair costs are significant across the many structures for which the Florida Department of Transportation (FDOT) is responsible. It is possible to use glass-fiber-reinforced polymer (GFRP) reinforcing bars instead of steel in concrete construction. GFRP does not corrode. The critical question is whether GFRP performs as well as steel over time.
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