▎ 摘　　要

NOVELTY - Road strength agent comprises 25-50 pts. wt. high-density polyethylene, 10-20 pts. wt. white carbon black, 2-10 pts. wt. nano-calcium carbonate, 5-10 pts. wt. rubber powder, 0.1-0.5 pt. wt. ionic liquid, 0.1-0.5 pt. wt. graphene, 5-15 pts. wt. wax plasticizer, and 0.5-2 pts. wt. alkyl phosphate. USE - The road strength agent is useful in asphalt mixture. ADVANTAGE - The road strength agent improves the water stability and low temperature cracking resistance of the asphalt mixture, improves the high temperature rutting resistance of the asphalt mixture, and is simple to use, and has excellent stability. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) A method for preparing the road strength agent, involving weighing the above-mentioned each component, mixing the ionic liquid with graphene to obtain mixture (A), mixing the mixture (A) with rubber powder to obtain mixture (B), mixing high-density polyethylene, white carbon black, nano-calcium carbonate, wax plasticizer, alkyl phosphate with mixture (B) to obtain mixture (C), entering the mixture into a twin-screw extruder for plasticization, banburying, granulation and cooling to obtain the road strength agent. (2) An asphalt mixture containing the road strength agents, mineral aggregates and base asphalt in a weight ratio of (0.05-2):(93-97):(2-6).