Tensile test of CRRP bonded steel plate with heat resistance epoxy resin

Steel structures are often corroded by various mechanisms, and their performance decreases dramatically due to corrosion. In recent years, as a repairing method for corroded steel members, a method bonding the carbon fiber sheets with resin to the steel member has been applied. However, the temperature of the steel member may rise near 60 degrees Celsius by solar radiation. Therefore, site curable heat resistance epoxy resins which have high glass transition temperature (Tg) greater than 60 degrees Celsius were developed. The objective of this study is to confirm the reinforcing effect and debonding characteristic of CFRP bonded steel plate at warm temperature. The tensile tests of CFRP bonded steel plate with the new heat resistance epoxy resin and the conventional epoxy resin at room temperature (23 degree Celsius) and warm temperature (60 degree Celsius) were conducted. As the results, in the case of using the new epoxy resin, the same test results were obtained at room temperature and at warm temperatures. The results showed that the new heat resistance epoxy resins were suitable for reinforcing of the steel members for CFRP.