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Recommendations of Environmental Reduction Factor of FRP Rebar for Durability Design of Concrete Structure
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 Title & Authors
Recommendations of Environmental Reduction Factor of FRP Rebar for Durability Design of Concrete Structure
Park Chan-Gi; Won Jong-Pil; Kang Joo-Won;
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The corrosion of steel rebars has been the major cause of reinforced concrete deterioration. FRP(Fiber-reinforced polymer) rebar has emerged as one of the most promising and affordable solutions to the corrosion problems of steel reinforcement in structural concrete. However, FRP rebar is prone to deteriorate due to other degradation mechanisms than those for steel. The high alkalinity of concrete, for instance, is a possible degradation source. Therefore, the USA, Japan, Canada, UK. etc are using environmental reduction factor. Although difference design guidelines were drawn in many, including USA, Japan, Canada, UK etc, recommendations and coefficients that could take into account the long-term behavior of FRP reinforcement were not well defined. This study focuses on recommendation of environmental reduction factor of FRP rebar. Environment reduction factor were decided using durability test result. FRP rebars were subjected to twelve type of exposure conditions including alkaline solution, acid solution, salt solution and deionized water etc. The water absorption behavior was observed by means of simple gravimetric measurements and durability properties were investigated by performing tensile, compressive and short beam tests. Based on the experimental result, environmental reduction factor of hybrid FRP rebar(A), and (C) and CFRP rebar was decided as 0.85. Also, hybrid FRP rebar(B) and GFRP rebar were decided as 0.7 for the environmental reduction factor
alkaline;acid solution;corrosion;design guidelines;deionized water;
 Cited by
콘크리트 보강용 FRP 리바의 촉진환경 노출후 인장 및 부착 특성,박찬기;원종필;

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GFRP 보강근의 설계 인장강도 발현을 위한 적정 그립시스템 개발,유영찬;박지선;유영준;박영환;김금환;

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강섬유 혼입률과 피복두께에 따른 GFRP 보강근의 부착특성,최윤철;

한국콘크리트학회논문집, 2012. vol.24. 6, pp.761-768 crossref(new window)
GFRP Rebar 보강 콘크리트 보의 급속노화환경에서의 휨 거동에 관한 연구,박연호;최열;

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강섬유 보강 콘크리트와 GFRP 보강근의 부착특성에 관한 실험적 연구,최윤철;

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