Binding material prepared from construction waste and preparation method thereof

The invention provides a binding material prepared from construction waste, which consists of the following components in part by mass: 80 to 90 parts of construction waste, 10 to 30 parts of auxiliary material, and 1.0 to 2.8 parts of additive, wherein the auxiliary material is one or both of yellow phosphorus slag and flyash, or one or both of lime stone and carbide slag; and the additive is two or three of 0.5 to 1 part of aluminum sulfate, 0.2 to 0.6 part of sodium sulfate and 0.5 to 1.2 parts of sodium carbonate. The hydraulic binding material produced by high temperature activation, mechanical activation and chemical activation can replace cement to be widely applied to producing baking-free bricks and roadbase materials. The binding material has the advantages of conveniently available raw materials, low cost, energy conservation and consumption reduction; and compared with the traditional cementing material, the binding material has the same using method and is convenient to promote and apply.