Preparation method of aerated brick with high calcium-silicon ratio and aerated brick with high calcium-silicon ratio prepared by preparation method

Abstract

The invention discloses a preparation method of an aerated brick with a high calcium-silicon ratio and the aerated brick with the high calcium-silicon ratio prepared by the preparation method, and relates to the technical field of building materials. The preparation method of the aerated brick with the high calcium-silicon ratio comprises the following steps: S1, pre-crystallization: weighing pre-crystallization raw materials, uniformly mixing the pre-crystallization raw materials, transferring the obtained mixture into a high-pressure reaction kettle, and carrying out crystallizing to obtain a calcium silicate crystallized compound; S2, mixing: weighing aerated brick powder, adding the calcium silicate crystallized compound prepared in the step S1, and carrying out uniform mixing to prepare a mixture; S3, slurrying: adding water into the mixture, performing stirring, adding aluminum powder, and continuing stirring to prepare slurry; S4, foaming and standing: injecting the slurry into a mold, conducting foaming, and performing standing to obtain a blank body; and S5, steam curing: cutting the blank body into aerated blocks, and performing steam curing to obtain the aerated brick. The preparation method of the high-calcium-silicon-ratio aerated brick has the advantage that the compressive strength of a product can be improved. The high-calcium-silicon-ratio aerated brick has the advantage of high compressive strength.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a method for preparing a high-calcium-silicon ratio aerated brick and the prepared high-calcium-silicon ratio aerated brick. Background technique [0002] Aerated bricks, also known as aerated concrete blocks, are aerated concrete products made by high-temperature autoclaving. Aerated bricks generally use siliceous materials such as sand and calcareous materials such as lime as the main raw materials, and are made into lightweight porous concrete products through pulping, pouring, static stopping, cutting, autoclaving and other processes. Aerated bricks have the advantages of light weight, good thermal insulation performance, good sound insulation effect, strong shock resistance, strong adaptability and good processing performance, and are gradually being widely used. [0003] The existing method of preparing aerated bricks is generally to prepare a slurry from raw ma...

AI Technical Summary

Problems solved by technology

[0004] However, during the high temperature and high pressure curing process of the embryo body, if the autoclave curing temperature is too low, the calcium silicate gel is not easy to undergo crystallization reaction to form a high-strength semi-crystalline calcium silicate material, which affects the compressive strength of the aerated brick. ; If the autoclave curing temperature is too high, the high-strength semi-crystalline calcium silicate material will easily turn into low-strength water garnet, which will have a certain adverse effect on the compressive strength of the aerated brick

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