(57) The invention discloses a method for preparing a concrete block by utilizing a composite silicon material and an autoclaved aerated concrete block prepared by using the method, and relates to the technical field of building materials. The method for preparing the concrete block by using the composite silicon material in the invention comprises the following steps: S1, mixing: weighing fly ash, adding an additive and a composite silicon material, and carrying out uniform mixing to obtain a mixture; S2, stirring and slurrying: adding water and neutral nano-silica sol into the mixture, carrying out stirring, then adding aluminum powder, and continuing stirring to prepare concrete slurry; S3, foaming and standing: injecting the concrete slurry into a mold, and carrying out foaming and standing to obtain a concrete blank; and S4, steam curing: cutting the concrete blank into concrete blocks, transferring the concrete blocks into an autoclave, and performing steam curing to obtain the autoclaved aerated concrete block. The method for preparing the concrete block by using the composite silicon material has the advantage of improving the compressive strength of the product. The autoclaved aerated concrete block has the advantage of good compression resistance.
(71) Sichuan Shangjin Yazhu Green Tech CO LTD