An Experimental Study for the Bond Performance of the Epoxy-coated Reinforcement in Marine Concrete Structures

해양 콘크리트 구조물에서 에폭시 도막철근의 부착성능에 관한 연구

In recent years, plenty of problems in the large-scaled bridges, piers…have been reported to the public due to the severe environment factors. The use of Epoxy-Coated reinforcement against salt and sulfate corrosion is considered as a reasonable solution and tested to study the bond performance between the thickness of coating and bond stresses. The results are that the strength of bond was decreased by 10 to 13 percent in the case of 100$\mu\textrm{m}$ of coating thickness and by 15 to 25 percent in the case of 200$\mu\textrm{m}$ to 300$\mu\textrm{m}$ and significantly fell down when the thickness was above 300$\mu\textrm{m}$. Accordingly, a 200$\mu\textrm{m}$ coating-thickness to the reinforcement is suggested to maintain the acceptable bond mechanism and goes well with the ASTM(item NO.A775) and those of Korean Concrete Institute.