To explore the enhancement effect of bamboo fiber on the mechanical properties of asphalt and asphalt mixture under different loading methods and different temperature conditions,the high temperature performance of asphalt with different bamboo fiber content was tested by dynamic shear rheometer.The asphalt mixture specimen containing 0.3%bamboo fiber was prepared by Superpave rotary compaction mechanism.The dynamic modulus and cyclic fatigue test of the specimen were car-ried out,and the changes of mechanical properties under different loading modes were analyzed.The results show that the addition of bamboo fiber improves the high temperature shear strength of as-phalt.The bamboo fiber with 0.3%content significantly improves the rutting resistance and fatigue life of asphalt mixture.The addition of bamboo fiber increases the dynamic modulus of asphalt mix-ture and decreases the phase angle.At the same time,it also enhances the stiffness and crack resist-ance of asphalt mixture at room temperature,but the improvement effect is not obvious at high tem-perature.
维普
万方数据