Abstract: Based on the micro-characteristics of fibers and the penetration test of fibrous asphalt gel‚as well as the low-temperature bending-creeping test of fiber -reinforced asphalt mixtures with3kinds of proportions‚the effects of fiber addition and proportion on the low-temperature ant- i cracking performance of the mixture were analyzed．The mechanism of performance improvement resulting from fiber addition was then investigated by means of the compound-material theory．The results reveal that the addition of fibers can evidently improve the low-temperature ant- i cracking performance of the fiber -reinforced asphalt mixture‚and that polyester fiber has the most remarkable effect on the per-formance improvement．

Key words: fiber -reinforced asphalt mixture, low-temperature ant- i cracking performance, fiber -reinforced mecha-nism, penetration test, bending-creeping test