Ultra-high performance concrete for large longitudinal slope bridge deck pavement and preparation method thereof

According to the ultra-high performance concrete for large longitudinal slope bridge deck pavement and the preparation method thereof, a low-temperature-sensitive polymer thixotropic agent and an inorganic thixotropic material are introduced into the concrete raw materials to form a low-temperature-sensitive and high-thixotropic ultra-high performance concrete mixture, nano calcium carbonate is added to fill defects between a special structure thixotropic network and a rubber material, and the low-temperature-sensitive and high-thixotropic ultra-high performance concrete is obtained. Calcium carbonate whiskers are used for interface enhancement, then fly ash microbeads with high sphericity and shaped quartz sand are used for reducing the viscosity of a mixture, meanwhile, an early strength type cementing material, a special water reducer and a setting control material are used for shortening the setting time, and gradient and thickness control in the large longitudinal slope bridge deck construction process b