▎ 摘　　要

NOVELTY - Preparing graphene nanosheet/block copolymer composite modified asphalt, comprises: mixing graphene nanosheet with organic solvent, and ultrasonically dispersing to obtain graphene nanosheet dispersion liquid; heating matrix asphalt to form uniform liquid, then adding block copolymer, and shearing at constant temperature to obtain block copolymer modified asphalt; mixing graphene nanosheet dispersion liquid and block copolymer modified asphalt, shearing at constant temperature, then adding crosslinking stabilizer, and continuously shearing to obtain the graphene nano sheet/block copolymer composite modified asphalt. USE - The nanosheet/block copolymer is useful in aging and self-repairing of road asphalt (claimed). ADVANTAGE - The method provides graphene nanosheet/block copolymer composite modified asphalt with excellent anti-oxidant and anti-rut performance and excellent heat conductivity under microwave induced heating, does not deform easily, is self-repairable and has long service life. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a graphene nanosheet/block copolymer composite modified asphalt, prepared by the above-mentioned method.