Water-stable layer material based on recycled aggregate and preparation method of water-stable layer material

The invention discloses a water-stable layer material based on recycled aggregate and a preparation method of the water-stable layer material. The water-stable layer material is prepared from the following raw materials in parts by weight: 150 to 180 parts of cement, 1000 to 1200 parts of modified recycled aggregate, 700 to 800 parts of machine-made sand, 30 to 40 parts of reinforced fiber and 130 to 150 parts of water, the modified recycled aggregate and the reinforced fiber are both of a core-shell structure with a soft shell and a hard core, the mechanical strength of the water-stable layer material can be improved, meanwhile, gaps of the recycled aggregate are filled with nano-silica, a modified polyester side chain on the surface of the reinforced fiber contains a siloxane structure, siloxane can be hydrolyzed in the raw material blending process, and the water-stable layer material is formed. The modified polyester main chain contains an organic silicon chain segment which can weaken the water absorptio