▎ 摘　　要

NOVELTY - Room temperature modified asphalt composition comprises 100 pts. wt. modified asphalt mixture comprising 4-15 wt.% modified asphalt binder including nanomaterial graphene oxide and 85-96 wt.% aggregate, and 10-30 pts. wt. dry oil including metal salt drying agent. The graphene oxide is a two-dimensional layer structure having size of less than or equal to 30 mu m, layer interval of 0.7-1.2 nm, and specific surface area of 500-800 m2/g. The graphene oxide is graphene oxide compound (I). USE - The composition is useful for emergency repair. ADVANTAGE - The composition improves application temperature range, plastic deformation resistance and fatigue cracking resistance of repair object, and extends durability of road pavement by suppressing temperature cracking resistance and top-down cracking. DETAILED DESCRIPTION - Room temperature modified asphalt composition comprises 100 pts. wt. modified asphalt mixture comprising 4-15 wt.% modified asphalt binder including nanomaterial graphene oxide and 85-96 wt.% aggregate, and 10-30 pts. wt. dry oil including metal salt drying agent. The graphene oxide is a two-dimensional layer structure having size of less than or equal to 30 mu m, layer interval of 0.7-1.2 nm, and specific surface area of 500-800 m2/g. The graphene oxide is graphene oxide compound of formula (I). An INDEPENDENT CLAIM is also included for producing room temperature modified asphalt composition, comprising (a) dispersing graphene oxide, softener and thermoplastic elastomer with modified asphalt modified with styrene-butadiene-styrene block copolymer using a high shear mixer at 150-180 degrees C to obtain a mixture, (b) adding rubber powder and petroleum resin into dispersed mixture, and mixing at 150-180 degrees C to prepare a modified asphalt binder, (c) preparing dry oil, (d) mixing aggregates heated at 120-200 degrees C and modified asphalt binder melted at 150-180 degrees C in an asphalt mixing mixer to obtain a modified asphalt mixture, and (e) adding dry oil into modified asphalt mixture to obtain room temperature modified asphalt composition.