Rapidly hardening mixture for road base and using method thereof

The invention discloses a rapidly hardening mixture for a road base and a using method thereof. The mixture is prepared by stirring and mixing a cementing material, gravel aggregate and water, wherein the cementing material comprises the following substances by weight percent: 30-50% of cement, 20-45% of slag powder, 15-30% of calcium sulfite coal ash, and 5-10% of paper mill sludge. The using method comprises the following steps of preparing the cementing material according to fixed proportion, stirring and mixing the cementing material with the gravel aggregate and water according to the use amount of 150-220kg/m of the cementing material, and transporting to a construction site; paving and rolling the mixture, maintaining for three days, then paving a bituminous concrete surface layer, and after finishing paving the surface layer, putting the road into use. The rapidly hardening mixture for the road base has advantages of high strength at early stage, low deflection value of the base layer and less cracks