Good-durability recycled concrete aggregate aerated brick and preparation method thereof

Abstract

The invention discloses a good-durability recycled concrete aggregate aerated brick. The brick is prepared from the following raw materials in parts by weight: 8-10 parts of cement, 18-20 parts of lime, 70-75 parts of a recycled concrete aggregate, 1-1.5 parts of gypsum, 0.7-0.8 part of aluminum powder, 7-8 parts of tetrabutyl titanate, 80-85 parts of ethanol, 35-37 parts of ammonia water, 6-7 parts of waste tire rubber powder, a proper amount of 0.2%-0.3% sodium hydroxide solution, 0.6-0.8 part of polyacrylonitrile microspheres, 1-1.3 parts of nano-iron and 7-8 parts of polyethyleneimine. By utilizing polyethyleneimine, a great number of carbon dioxide in damp air can be absorbed, the carbonization of the aerated brick can be delayed, and the service life of the aerated brick can be prolonged; by utilizing nano-iron, the strength of the aerated brick is enhanced, and the oxidation of cement is delayed; and by utilizing the polyacrylonitrile microspheres, the tenacity and thermal insulation property of the aerated brick are improved.

Description

technical field [0001] The invention relates to the technical field of aerated bricks, in particular to a durable recycled concrete aggregate aerated brick and a preparation method thereof. Background technique [0002] A large amount of solid waste generated during house demolition or new construction, of which more than 90% is ground ash, broken bricks, and waste concrete blocks. At present, most construction solid wastes in my country are disposed of in open-air stacks or landfills, causing certain environmental pressure. [0003] Recycled aggregates can be obtained by crushing, cleaning, grading, and grading and mixing construction solid wastes in a certain proportion. Compared with natural sand and gravel aggregates, this recycled aggregate has low strength, high water absorption, and material performance variation. Great features. At present, recycled concrete coarse and fine aggregates are widely studied and applied to make recycled concrete technology, often only u...

AI Technical Summary

Problems solved by technology

[0006] It is feasible to use recycled concrete aggregates to produce aerated bricks, but recycled concrete aggregates still have the disadvantages of high water absorption, fast carbonization, and easy pulverization, which need to be improved, and the water resistance and wear resistance of aerated bricks also need to be improved. performance, antistatic, anticorrosion, antifreeze, anti-cracking, shock resistance, sound-absorbing performance, dimensional stability, flame retardancy, high temperature resistance, etc.