PLANT MIX TYPE ASPHALT MODIFIER AND PRE MIX TYPE ASPHALT BINDER AND ASPHALT MIXTURE

摘要

The present invention relates to a plant mix type modifier for asphalt pavement, a premix type modified asphalt binder, and a multiple layer low noise drainage composition using the same, and to improve viscosity and crack resistance of asphalt.To achieve this, the plant mix type modifier of the present invention comprises 25 to 35% by weight of a high molecular weight SBS having a molecular weight of 250,000 to 350,000, 10 to 30% by weight of a low molecular weight SBS having a molecular weight of 30,000 to 120,000, And the antioxidant is 0.1 to 3% by weight based on the total weight of the asphalt, 3 to 15% by weight of the asphalt, 2 to 12% by weight of ginsenoside, 1 to 4% by weight of the grahamite, 5 to 20% .The pre-mix type modified asphalt binder may further contain 5 to 20% by weight of high molecular weight SBS having a molecular weight of 250,000 to 350,000, 40 to 55% by weight of low molecular weight SBS having a molecular weight of 30,000 to 120,000, 5 to 15% A mixture consisting of 3 to 15% by weight of asphalt, 2 to 12% by weight of gilsonite, 10 to 20% by weight of a petroleum resin and 0.1 to 3% by weight of an antioxidant is mixed with an asphalt binder and 80 to 95% by weight of an asphalt binder And 3 to 20% by weight of the mixture is mixed.