GFRP Reinforced Concrete Adhesion in Low Temperature Environment

In order to study the bond properties of GFRP reinforced concrete at low temperature, a test device for mechanical loading and strain testing at low temperature was designed and developed. The effects of temperature, diameter of GFRP bar and bond length of GFRP bar and concrete on the bond properties of FRP bar concrete were studied. The study shows that the temperature is reduced from -10 °C to -30 °C, and the bond performance of GFRP reinforced concrete is increased by 15.5 % to 40 %, and the bond performance is enhanced by the load. Adhesive properties also become smaller as the bond length and GFRP diameter increase.