Environment-friendly coal gangue-based all-solid waste pavement base mixture and preparation method thereof

The invention discloses an environment-friendly coal gangue-based all-solid waste pavement base mixture and a preparation method thereof. The mixture comprises coal gangue coarse aggregate, a low-temperature sintering cementing material, a thickening time control agent, fly ash, stone chips and an activating agent. According to the method, high-strength particles in the coal gangue are separated as coarse aggregates in a sorting and crushing manner, soft particles with high carbon content and low strength are mixed with the carbide slag, the silicon-calcium slag and the desulfurized gypsum to prepare a low-temperature fired cementing material for replacing cement, and the performance of the mixture is adjusted in an auxiliary manner through the thickening time control agent and the activating agent; the semi-rigid base mixture with good construction performance and pavement performance is prepared, and the mixture can directly replace cement stabilized macadam to be used for road engineering construction. Acc