Fusion Bonded Epoxy와 철근 콘크리트의 부착 응력에 있어서 Fe<sub>2</sub>O<sub>3</sub>와 Fumed Silica가 미치는 영향

박재홍; 신영조

Polymer(Korea), Vol.21, No.1, 64-70, January, 1997

Export Citation

Fusion Bonded Epoxy와 철근 콘크리트의 부착 응력에 있어서 Fe₂O₃와 Fumed Silica가 미치는 영향

Effect of Fe₂O₃ and Fumed Silica in Bond Strength between Fusion Bonded Epoxy and Reinforcing Steel Bar Concrete

박재홍, 신영조

초록

철근 콘크리트 구조물에 철근의 방청을 위한 한 방법으로 fusion bonded epoxy coating (ASTM A775M)을 하므로써 철근 콘크리트 구조물의 부식 방지를 하여 수명을 향상시키는 방법이 세계적으로 사용되고 있는데 이 방법은 방청성, 내약품성, 기계적 물성 등은 우수하나 매끄러운 에폭시 도막으로 인하여 콘크리트와의 부착성능이 맨 철근에 비해 80∼88% (에폭시 도막 두께 180∼300㎛)정도로 떨어지므로 Fe₂O₃와 fumed silica를 에폭시 도료에 도입하여 부착성능 실험을 하였을 시에 부착성능이 크게 향상되었다.

Fusion bonded epoxy powder coating (ASTM A775M) is widely used in protection of reinforcing steel bar embedded in concrete to improve durability of concrete structures. Epoxy coating for rebar has excellent corrosion-resistance, chemical-resistance and mechanical properties but the bond strength between cured epoxy film and concrete decrease severely with increasing film thickness. Fe₂O₃, fumed silica, that are, cement components, were introduced in formula of epoxy coating and bond strength behaviors were investigated. The result is bond strength between cured epoxy film and concrete is increased dramatically upto 99% specialty in fumed silica.

Keywords:epoxy;fumed silica;Fe₂O₃;bond strength

[References]

Elfrench, Polym. Paint Colour J., 11, 25 (1987)
Fletcher A, Polym. Paint Colour J., 11, 12 (1986)
Bagchi D, J. Protective Coat. Livings, March (1991)
Thompson DM, Polym. Paint Colour J., 25, 11 (1987)
Mcleod K, Polym. Paint Colour J., 29, 11 (1989)
Fujishima C, Chalkley B, Polym. Paint Colour J., 25, 11 (1989)
Jeong JD, Concrete Soc. Korea, 4, 1 (1992)

[1] Elfrench, Polym. Paint Colour J., 11, 25 (1987)

[2] Fletcher A, Polym. Paint Colour J., 11, 12 (1986)

[3] Bagchi D, J. Protective Coat. Livings, March (1991)

[4] Thompson DM, Polym. Paint Colour J., 25, 11 (1987)

[5] Mcleod K, Polym. Paint Colour J., 29, 11 (1989)

[6] Fujishima C, Chalkley B, Polym. Paint Colour J., 25, 11 (1989)

[7] Jeong JD, Concrete Soc. Korea, 4, 1 (1992)