Study on aging properties and degradation mechanism of FRP bars

The tensile properties of fiber-reinforced composites (FRP) under various factors composite aging were studied by test. test parameters mainly include temperature, salt spray, ultraviolet, rainwater, and stress. results show that the higher faster FRP strength decreases; At same ultraviolet radiation has little effect on BFRP bars. Salt spray rainwater hydrolyze resin surface steel bars expose inner Stress can accelerate degradation It elastic modulus A scanning electron microscope (SEM) was used to observe changes mechanism mechanical property