A method for manufacturing autoclaved fly ash aerated concrete block

Abstract

The invention relates to a manufacture method for an autoclaved fly-ash aerated concrete block, and belongs to the field of building materials. The method comprises performing granulation and sintering on a waste fly-ash aerated block, fly ash, quicklime, desulfurized gypsum, waste concrete, crushed waste glass and water glass, so as to obtain an aggregate C; and then preparing a mixed slurry from a non ferrous metal slag powder, cement, quicklime, the aggregate C, desulfurized gypsum, an efficient foaming agent, an efficient mortar thickening powder, sodium poly[(naphthaleneformaldehyde)sulfonate], polyvinyl alcohol, aluminium hydroxide and water, pouring into a die for molding, and performing autoclave curing, so as to obtain the target product. The method consumes a large amount of solid wastes, and the building block firm in bonding, good in impermeability and low in shrinkage value, and quality disadvantages such as peeling, cracking and the like of a built wall are overcome. By adding the aggregate C with high strength and light weight, the autoclaved fly-ash aerated concrete block is improved in structure, improved in limit load and compressive strength, and high in thermal-insulation performance. The efficient foaming agent is capable of forming stable foams, and is large in foaming amount and high in foaming multiple.

Description

Technical field [0001] The invention relates to a method for manufacturing an autoclaved fly ash aerated concrete block, which belongs to the field of building materials. Background technique [0002] With the continuous improvement of living standards, the solid waste generated in human daily life and production will generate billions of tons of garbage every year. Due to the large amount of discharge, the complex and diverse components, and the pollution, resource and social nature, It needs to be harmless, resourced, reduced and socialized. If it is not handled properly, it will pollute the environment, affect environmental health, waste resources, undermine the safety of production and life, and disrupt social harmony. For example, the remaining waste during construction or the concrete waste such as the concrete layer of the demolition floor, it can neither be discharged into rivers (because it is easy to pollute and block waterways), nor can it be converted into commodities...

AI Technical Summary

Problems solved by technology

However, the compressive strength of the autoclaved fly ash aerated concrete block produced by this method is slightly lower, only 3Mpa, and quality problems such as shelling and cracking are prone to occur when used for building walls; the foaming ratio of the blowing agent is low , generally 6~10 times; the processing of sintered aggregate raw materials requires fine processing, and the grinding particle size is generally less than 0.03mm. If the proportion is too large, at a certain temperature, the viscosity of the material is too high, which is not conducive to ball formation; and the sintering temperature of general sintered aggregates is 1050~1100 ° C, high energy consumption and slightly higher production costs