Abstract: “The influence of number of CFRP sheet layers on bond strength between CFRP sheet and concrete was investigated by conducting double shear type pullout test. A total of eighteen concrete prisms were examined with different number of CFRP layer and maximum aggregate size. One, two and three layers of CFRP sheet were used. The experimental results indicate that the number of layers affect the bond strength. When the number of layer increases the bond strength increases beyond a certain value. Therefore, the number of layer is another factor that causes the CFRP sheets not to be fully utilized.”

Keywords: CFRP layers, bond strength, bond behavior, concrete, slippage