Preparing a kind of fly ash and a method for building boards of the product prepared in the process

The present invention discloses a method for preparing fly ash as the main material for building boards, comprising the steps of: 35-60 parts by weight of fly ash was weighed, 20-45 parts by weight of cement, 4-15 parts by weight of sodium hydroxide , 6-16 parts by weight of the gypsum, mixed, water was added, a foaming agent solution and phosphoric acid solution to obtain a slurry, the slurry is poured into the molding die, vibration molding, curing at room temperature, after releasing autoclave in conservation, then curing at room temperature, and finally into the modification process water, and dried to obtain. The present invention also discloses products prepared by the above method. The method of the present invention facilitates the processing of fly ash, the strength of the sheet produced large, good flexural and compressive strength, with a certain water resistance, good thermal insulation and sound insulation, light weight, and the production process is simple, low cost.