Title: Marine Environmental Condition Effect on FRP Sheets Durability and Bond Strength to Concrete
Author(s): Amin Kashi, Ali Akbar Ramezanianpour, Faramarz Moodi, and Mohsen Kheirandish
Publication: Symposium Paper
Appears on pages(s): 112.1-112.8
Keywords: FRP sheets, durability, tensile properties, bond strength, marine environment
In recent years, the use of Fiber Reinforced Polymers (FRPs) has been recommended for strengthening and rehabilitation of concrete structures. FRPs may prove to be durable, but the long-term durability of these materials in specific aggressive environments is not comprehensively documented. This paper presents the results of the tests investigating the tensile properties of FRP sheets and their bond strength to concrete when subjected to marine environmental condition. In this research, a marine simulator was designed and constructed similar to the tidal zone of Persian Gulf. Tensile properties of FRP sheets and bond strength of them to concrete were studied after placing them inside the simulator for 3000 and 9000 hours. After 9000 hours marine exposure, ultimate tensile strength and elastic modulus were degraded by 49% and 30%, respectively, in Glass Fiber Reinforced Polymer (GFRP). Also, 8% and 22% reduction was observed in ultimate tensile strength and elastic modus of Carbon Fiber Reinforced Polymer (CFRP), respectively, after 9000 hours exposure. Results of pull-off test revealed that the bond strength of CFRP and GFRP sheets to concrete were decreased by 14.8% and 18.7%, respectively, after 9000 hours marine exposure.