Abstract:In order to study the effect of the replacement ratio of recycled coarse aggregates and the volume of waste fibers on the creep failure time, creep deformation and creep of waste fiber recycled concrete, a group of ordinary concrete and 4 groups of waste fiber recycled concrete specimens creep tests at 85%, 90% and 95% stress levels were carried out under laboratory conditions. The test results showed that with the increase of the replacement rate of recycled coarse aggregate, the time of creep failure, the creep deformation and the creep degree increase; with the increase of the volume of waste fibers, the creep deformation and creep degree decrease, the time of creep failure increases. The addition of waste fibers can effectively alleviate the degree of compression and creep damage of recycled concrete. The ACI209R creep prediction model was modified based on the replacement rate of recycled coarse aggregate and the volume of waste fiber. The model prediction results were in good agreement with the experimental values.