The invention discloses a normal-temperature bio-based
asphalt cold
patch material and a preparation method thereof. The cold
patch material comprises 96.5-98wt% of an
asphalt pavement recycled material and 2-3.5 wt% of a bio-based
asphalt cold patch liquid, and the cold patch liquid comprises 60-70wt% of matrix asphalt, 10-20wt% of a bio-based
diluent and 20-30wt% of a bio-based regenerant. The preparation method comprises the following steps: preparing
epoxidized soybean oil methyl ester and hydrogenated
methyl ricinoleate; the preparation method comprises the following steps: uniformly mixing
vegetable oil and a derivative component thereof,
fatty acid and an ester component thereof, a natural small-molecular
organic matter component and
carnosic acid at normal temperature to prepare a bio-based
diluent; the method comprises the following steps: heating matrix asphalt to a flowing state, adding a bio-based regenerant, cooling, and adding a bio-based
diluent to prepare a cold supplementing liquid; and adding the cold patch liquid into the
asphalt pavement recycled material, and mixing to obtain the cold
patch material. The bio-based asphalt cold patch material has high
initial strength, the repaired pavement is high in stability, and the
repair rate of diseases and the probability of repeated occurrence of the diseases are greatly reduced.