Bond Strength of Fiber Reinforced Polymer (FRP) Bars in Autoclaved Aerated Concrete (AAC)

摘要

The use of fiber reinforced polymer (FRP) composites is significantly growing in civil engineering works where maintenance cost of structure is concerned. They have excellent properties on highly corrosion resistance, high strength and lightweight. This research studies bond strength of autoclaved aerated concrete (AAC) reinforced with FRP bars. It is compared with autoclaved aerated concrete reinforced with mild steel bars. The concentric pullout method is implemented in order to find the bond strength. The bond strength including the mode of failure and bond strength is studied with varying type, surface treatment and embed-ment length of reinforcing bars. The result reveals that bond strength is found increased with embedment length. In particular, sand -coated Carbon fiber bar gives the most promising results with the highest bond strength in synthetic fiber bars.