Preparation method of autoclaved-aerated concrete building block

Abstract

The invention discloses a preparation method of autoclaved-aerated concrete building block. The preparation method includes following steps: mixing and grinding coal ash waste, basalt powder, calcium carbonate and zeolite powder, and feeding into a sintering machine for sintering to obtain mixed aggregate; adding river sand, sulfonated melamine-formaldehyde resin and cellulose fiber into the mixed aggregate, ball milling, adding cement, polyethylene glycol and modified foamer, and stirring to obtain mixed slurry; pouring the mixed slurry into a mould, increasing temperature for pre-curing, demoulding, cutting, autoclaved curing, and cooling to obtain the autoclaved-aerated concrete building block. The coal ash waste is used, so that the building blocks are low in cost, extremely high in extreme load and compressive strength and conducive to overcoming the quality defects of flaking and cracking of walls built by the building block; the inside of the building block contains a lot of uniform air holes, so that the building block has extremely high pressure bearing capacity and remarkable economic benefit and social benefit.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a method for preparing an autoclaved aerated concrete block. Background technique [0002] The waste left over from building construction or the concrete waste such as the demolition of the concrete layer of the floor, because it is easy to pollute and block the waterway, can neither be discharged into the river ditch, nor can it be converted into commodities and sold. The additional landfill site, machinery, labor and other processing costs are a heavy burden. [0003] In the process of coal block production and processing, more unqualified fly ash waste is likely to be produced. This part of fly ash waste occupies the enterprise's inventory, which virtually increases the operating cost of the enterprise and is difficult to handle. The existing autoclaved aerated concrete masonry Block production mainly uses fly ash, lime, cement, gypsum, etc. as the main materials, ...

AI Technical Summary

Problems solved by technology

[0002] The waste left over from building construction or the concrete waste such as the demolition of the concrete layer of the floor, because it is easy to pollute and block the waterway, can neither be discharged into the river ditch, nor can it be converted into commodities and sold. Additional landfill site, machinery, labor and other processing costs, the burden is heavy

[0003] In the process of coal block production and processing, more unqualified fly ash waste is likely to be produced. This part of fly ash waste occupies the enterprise's inventory, which virtually increases the operating cost of the enterprise and is difficult to handle. The existing autoclaved aerated concrete masonry Block production mainly uses fly ash, lime, cement, gypsum, etc. as the main materials, and is a new type of building material obtained through aluminum powder gas generation and high-pressure saturated steam autoclaving; but its compressive strength is low, and the masonry wall The body is prone to shelling and cracking, and the cost is high, which needs to be solved urgently