Multi-scale nano-material composite diatomite modified drainage asphalt mixture and preparation method thereof

The invention discloses a multi-scale nano-material composite diatomite modified drainage asphalt mixture. The asphalt mixture is prepared from the following raw materials: mineral aggregate, asphalt,ceramic fibers, a diatomite modifier, an improver, a stabilizer, a coupling agent, organic vermiculite (OEVMT), organic montmorillonite (OMMT), nanometer silicon dioxide and nanometer aluminum oxide.The asphalt mixture has the advantages of excellent pavement performance, simple preparation process and usage of nontoxic and harmless raw materials, can enhance the high-temperature stability, low-temperature crack resistance, water stability and fatigue property of a drainage asphalt pavement, and has important meanings for prolonging the service life of the drainage asphalt pavement. The drainage asphalt mixture belongs to environment-friendly non-toxic non-corrosive materials, has the advantages of wide raw material source, no pollution in the production process and low price, and produces favorable economic and