Recycled aggregate medium-dry hard concrete prepared by using building waste and preparation method of recycled aggregate medium-dry hard concrete

The invention discloses a recycled aggregate medium-dry hard concrete prepared by using building waste, which comprises the following raw materials of coarse aggregate, fine aggregate, a gelatinizing agent, a water reducing agent and water, wherein the gelatinizing agent comprises cement and coal ash, and the coarse aggregate comprises 50-100 percent of recycled coarse aggregate prepared from thebuilding waste. A preparation method of the recycled aggregate medium-dry hard concrete comprises the following steps of: pretreating the building waste, removing impurities, remaining waste concrete, waste bricks and the like; crushing and screening to prepare the recycled coarse aggregate; mixing the recycled coarse aggregate, natural sand, cement and water according to the proportion, adding the coal ash and the water reducing agent, stirring uniformly to obtain a mixture; and squeezing and forming the mixture, curing for 2 days to obtain the recycled aggregate medium-dry hard concrete. The invention solves the problems of worsening ecological environment and the like caused by difficulty in treating the building waste; and the building wastes are used for manufacturing the recycled aggregate for replacing natural aggregate, the increasingly deficient natural aggregate and damage degree to the ecological environment are reduced, and the living environment of human beings is protected. The recycled aggregate medium-dry hard concrete prepared by using the method has high strength and high abrasive resistance, and can be used for building base installations such as city roads, housing constructions and the like.