Autoclaved aerated concrete and preparation method thereof

Abstract

The invention discloses autoclaved aerated concrete, and relates to the technical field of autoclaved aerated concrete. The autoclaved aerated concrete comprises an outer surface layer, a connecting layer and a core layer; the outer surface layer is made of high-strength concrete, cellulose ether, redispersible polymer latex powder and an anti-cracking agent; the connecting layer is made of cement, quartz sand, ground calcium carbonate powder, redispersible polymer latex powder, cellulose ether and an anti-cracking agent; and the core layer is made of cement, fly ash, lime, gypsum, aluminum powder paste and waste slurry. The invention further provides a preparation method. The preparation method comprises the steps of preparing the outer surface layer concrete, the connecting layer concrete and the core layer concrete, then horizontally and uniformly filling the outer surface layer concrete, the connecting layer concrete and the core layer concrete into a mold, finally putting the moldinto an autoclave room for autoclaving and aerating, and demolding after curing. The autoclaved aerated concrete provided by the invention retains the good light weight, mechanical strength and frostresistance of traditional autoclaved aerated concrete, and also greatly improves the waterproof ability, so that the autoclaved aerated concrete has wider applicability.

Description

technical field [0001] The invention relates to the technical field of autoclaved aerated concrete, in particular to an autoclaved aerated concrete and a preparation method thereof. Background technique [0002] Autoclaved aerated concrete is made of siliceous materials (sand, fly ash and silicon-containing tailings, etc.) , pouring, pre-curing, cutting, autoclaving, curing and other processes made of lightweight porous silicate products. [0003] Autoclaved aerated concrete has countless tiny pores inside, and these pores form a static air layer in the material. Therefore, autoclaved aerated concrete products have thermal insulation, fire-resistant and flame-retardant, sound-absorbing and sound-proof, light and processable, etc. However, along with these advantages, these pores will also make the autoclaved aerated concrete products easy to absorb water and moisture, thus limiting the use of autoclaved aerated concrete products. [0004] In order to improve the hygroscopi...

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Problems solved by technology

[0003] Autoclaved aerated concrete has countless tiny pores inside, and these pores form a static air layer in the material. Therefore, autoclaved aerated concrete products have thermal insulation, fire-resistant and flame-retardant, sound-absorbing and sound-proof, light and processable, etc. effect, but along with these advantages, these pores will also make the autoclaved aerated concrete products easy to absorb water and moisture, so that the use of autoclaved aerated concrete products has limitations

[0004] In order to improve the hygroscopicity of autoclaved aerated concrete products, it is often used to apply a waterproof coating to the surface of autoclaved aerated concrete products to play a waterproof role, but this method has waterproof coatings and the surface of autoclaved aerated concrete products The affinity is not high, and moisture enters the interior of the autoclaved aerated concrete product from the gap, causing the autoclaved aerated concrete product to swell after absorbing moisture, and the waterproof coating to detach.

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