Direct vat set modified ultra-thin wearing course asphalt mixture and construction process thereof

The invention discloses a direct vat set modified ultrathin wearing course asphalt mixture which is prepared from the following raw materials in parts by weight: 5-10 parts of a dry method composite modifier, 45-55 parts of heavy traffic petroleum asphalt and 930-940 parts of aggregate, wherein the dry-method composite modifier is prepared by compounding an interface cross-linking agent, waste tire rubber powder and thermoplastic rubber SBS (Styrene Butadiene Styrene); the aggregate is prepared from the following raw materials in parts by weight: 75-85 parts of coarse aggregate of 5-10 mm, 15-25 parts of fine aggregate of 0-5 mm and 5-10 parts of mineral powder; the invention also provides a construction process of the direct-vat modified ultra-thin wearing course asphalt mixture. According to the present invention, the waste tire ground rubber powder is adopted to perform composite modification on the petroleum asphalt direct feeding through the interface cross-linking agent and the SBS rubber, the interface