This paper presents design concept as well as trial products to develop hybrid reinforcing polymer bars. The objective of this study is to develop a viable hybrid FRP bar for concrete structures, especially for marine and waterfront concrete structures. Three different types of hybrid FRP bar were considered in the development. Using E-glass fibers, unsaturated polyester resins, and conventional steel bar, hybrid GFRP bar samples of 9 mm and 13 mm in diameter were fabricated as the trial products. The results obtained in the pultrusion process of the trial products are discussed in this paper

In case of reinforced concrete based structures, deterioration is mainly due to corrosion of steel rebar. So, the advanced construction rebar materials which have high resistance to corrosion should be developed with the application techniques. In Korea Institute of Construction Technology, the research project on hybrid reinforcing bars have performed since 2013 during 5 years. In this paper, the verification methodologies on corrosion and durability which will be applied to developed hybrid reinforcing bars are suggested