The modified asphalt mixture according to the present invention (i) has a diameter of 10 to 900 nm with respect to 100 parts by weight of asphalt, and a hollow part 12 is formed in the center of the body 11 along the longitudinal direction, 2 to 8 parts by weight of carbon nano-hollow fiber 10 in which micropores 13 for communicating the outer surface of the body 11 and the hollow part 12 are irregularly formed, and (iii) linear styrene-butadiene -It is characterized in that 10 to 30 parts by weight of a urethane polymer, 30 to 80 parts by weight of polyethylene wax, and 5 to 10 parts by weight of a modifier mixed with 10 to 50 parts by weight of process oil are mixed with respect to 100 parts by weight of styrene synthetic rubber. The present invention improves the strength and frictional durability while reducing the plastic change of the asphalt pavement, and can significantly lower the mixing temperature of the aggregate and asphalt during the manufacture of the asphalt mixture and the compaction temperature during the construction of the asphalt pavement, thereby shortening the construction period. It reduces energy consumption.
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