Method for manufacturing aerated hollow bricks by abandoned construction waste

Abstract

The invention discloses a method for manufacturing aerated hollow bricks by abandoned construction waste. The method includes steps of (1), mixing dry-base raw materials including crushed and treated abandoned construction waste, quicklime, cement and the like according to mass parts; (2), adding water accounting for 85-95% of the mass of the dry-base raw materials mixed in the step (1), adding waste aluminum powder accounting for 0.04-0.06% of the mass of the dry-base mixed raw materials, gypsum accounting for 9-11% of the mass of the quicklime and the like into the dry-base raw materials; (3), mixing the mixture in the step (2) to obtain slurry and then foaming the slurry for 30 to 40 minutes at the temperature ranging from 65 DEG C to 75 DEG C; and (4), performing autoclaved curing for the foamed slurry obtained from the step (3) under constant temperature to obtain a green body and cutting the green body into the aerated hollow bricks with corresponding sizes. Consumption of the abandoned construction waste is high, effects of energy conservation and environmental protection are realized, the problem of environmental pollution caused by stockpiling and disposal of the abandoned construction waste is alleviated, and a new raw material for production of the hollow bricks is provided.

Description

technical field [0001] The invention relates to the field of new building materials, in particular to a method for preparing aerated hollow bricks from waste construction waste. Background technique [0002] Construction waste refers to the dregs, spoils, waste materials, residual mud and other wastes generated during the construction, laying or demolition, and repair of various buildings, structures, and pipe networks by construction units or individuals. [0003] At present, the amount of construction waste in my country has accounted for 30%-40% of the total amount of urban waste. Calculated on the basis of 500-600 tons / 10,000 square meters, by 2020, my country will add about 30 billion square meters of construction waste, and the newly generated construction waste will be a shocking number. However, the vast majority of construction waste is transported to the suburbs or villages by the construction unit without any treatment, and is piled in the open air or landfilled,...

AI Technical Summary

Problems solved by technology

However, the vast majority of construction waste is transported to the suburbs or villages by the construction unit without any treatment, and is stacked in the open air or landfilled, which consumes a lot of construction expenses such as land acquisition fees, garbage removal and transportation fees, and at the same time, during the process of clearing, transporting and stacking Problems such as the scattering of dust and flying dust and sand have caused serious environmental pollution.

[0004] For a long time, the comprehensive utilization of construction waste has been a worldwide problem. Although a lot of research has been done on the comprehensive utilization of construction waste at home and abroad, due to various technical and economic reasons, most of them have not been put into industrial realization.

[0005] In summary, there have been reports using construction waste as auxiliary raw materials to produce cement, wall bricks, and road materials, but there has been no report on using construction waste as the main raw material for the production of aerated blocks

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