This study compares and analyzes the effects of different dosages of basalt fiber and lignin fiber on the pavement performance of asphalt concrete,mainly involving high temperature performance,low temperature perform-ance,and water stability.Results indicate that both types of fibers can significantly improve the main pavement per-formance of asphalt concrete,but the fiber dosage needs to be reasonably controlled.When the dosage of lignin fiber is 0.3%and the dosage of basalt fiber is 0.4%,the high-temperature performance and low-temperature performance of asphalt concrete reach the best:the dynamic stability is improved by 53.4%and 73.1%,respectively,and the low-tem-perature bending and tensile strain increased by 20.3%and 11.9%,respectively.When the fiber dosage does not exceed 0.4%,the water stability of asphalt concrete is continuously improved.Considering the pavement performance and eco-nomic cost of fiber-reinforced asphalt concrete,when focusing on the high-temperature performance,it is recommended to use basalt fiber and maintain its dosage at 0.4%.When focusing on the low-temperature performance and water sta-bility,it is recommended to use lignin fibers and maintain its dosage at 0.3%.
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