Bio-based epoxy asphalt and preparation method thereof

The invention discloses bio-based epoxy asphalt and a preparation method thereof. The asphalt is prepared by modifying asphalt with lignin-based epoxy resin and a curing agent under the action of a catalyst, wherein the catalyst is 2-ethyl 1,4-methylimidazole; the curing agent id tung oil fatty acid; the mass ratio of the lignin-based epoxy resin to the tung oil fatty acid is 100:80; the ratio ofthe total mass of the lignin-based epoxy resin and the curing agent to the mass of the asphalt is 100:(7.5-22.5); and the ratio of the total mass of the lignin-based epoxy resin, the asphalt and the curing agent to the mass of the catalyst is 189:1. The obtained bio-based epoxy asphalt is low in price and non-toxic, precipitation and oxidation of bio-oil light components are reduced, and the agingphenomenon is slowed down. And the thermoplastic properties of low-temperature brittleness and high-temperature softness of the traditional asphalt are fundamentally changed. 本发明公开了一种生物基环氧沥青及其制备方法，该沥青是由木质素基环氧树脂、固化剂在催化剂的作用下，对沥