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Title |
Freezing-Thawing Resistance of Fiber Reinforced Polymers in Strengthening RC Members
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Keywords |
동결융해 ; 내구성 ; FRP 복합체 ; 인장강도 ; 인발접착강도 Freezing-thawing ; Durability ; FRP composite ; Tensile strength ; Pull-off strength |
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Abstract |
The strengthening performance of FRPs(Fiber Reinforced Polymers) is directly affected by the environmental conditions such as freezing-thawing and moisture because FRPs are usually bonded on the concrete surface. It is, therefore, strongly required to evaluate a durability of bond between FRPs and concrete as well as FRP materials itself. The freezing-thawing resistance of FRPs is evaluated in this study with the variables of freezing-thawing conditions, types of FRP and freezing-thawing cycles. From the test results, it is found that tensile strength and pull-off strength of CFRP are not affected by the freezing-thawing. On the other hands, those of GFRP show a little degradation because of continuous water immersion during thawing process. But, cautions are needed on the bond durability between FRPs and concrete in case of continuous water supplying from adjacent to the concrete.
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