Autoclaved aerated concrete and preparation method thereof

An autoclaved aeration, concrete technology, applied in ceramic products, climate sustainability, other household appliances, etc., can solve the overall situation that is not conducive to the comprehensive utilization of solid waste, reduce the utilization of bulk solid waste, etc., and achieve cost Low, excellent performance, simple preparation process

Inactive Publication Date: 2014-09-03
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The amount of fly ash used as raw materials does not exceed 70% of solid raw materials, or a large amount of quartz sand is used to replace fly ash, and the u

Method used

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  • Autoclaved aerated concrete and preparation method thereof
  • Autoclaved aerated concrete and preparation method thereof

Examples

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preparation example Construction

[0057] Another embodiment of the present invention provides the preparation method of the above-mentioned autoclaved aerated concrete, including:

[0058] (1) Preparation of basic activator

[0059] Choose sodium (potassium) water glass and NaOH / KOH as raw materials, dissolve NaOH / KOH in water, and control the molar concentration at 5~15mol / L; choose sodium (potassium) water glass, and control the modulus to 2~3.5; or mixed, control the overall modulus of the mixture at 1.0~2.0; stir for 1~10min, put in a plastic container, and let stand for 12~48h.

[0060] (2) Mix and stir

[0061] Mix mineral raw materials, alkaline activator, foam stabilizer and water, and then mix and stir with foaming agent and desulfurized gypsum. The stirring time is 1-10 minutes, and it can be stirred for 1, 3, 5, 7, 10 minutes, etc. until the stirring Uniform;

[0062] (3) Pouring

[0063] Pour the slurry into the mold, and adjust the pouring spread to about 15%;

[0064] (4) Rest

[0065] Afte...

Embodiment 1

[0073] Measure 350g of sodium water glass, with a modulus of 3.25 and a density of 1.38g / ml; weigh 40g of NaOH and 40g of water and mix evenly, then mix evenly with water glass and 0.27g of foam stabilizer, and place it for 24 hours to form a liquid alkaline stimulant.

[0074] Weigh 300g of Class I fly ash as mineral raw material, weigh 15g of H 2 o 2 Foaming agent, 6g desulfurized gypsum, added to the mineral raw materials, and mixed evenly.

[0075] Mix the liquid alkaline activator with the solid raw material, stir evenly, add foaming agent, and stir for 3 minutes.

[0076] Pouring the mixed material into steel or plastic moulds, sealed, 60 o C under rest for 60min.

[0077] The green body is turned over and demolded, and cut with a cutting machine to remove excess bottom material and top material.

[0078] Put the cut semi-finished product into the autoclave at a temperature of 90 o C, under the conditions of pressure 0.3MPa, curing humidity 90%, curing for 4 hours,...

Embodiment 2

[0082] Measure 240g of sodium water glass, with a modulus of 3.25 and a density of 1.38g / ml; weigh 37g of NaOH and 60g of water and mix evenly, then mix evenly with water glass and 0.16g of foam stabilizer, leave it for 24 hours, and use it as a liquid alkaline stimulant.

[0083] Weigh 240g of Class II fly ash, 60g of slag as mineral raw material, weigh 9g H 2 o 2 Foaming agent, 9g desulfurized gypsum, added to the mineral raw materials, and mixed evenly.

[0084] Mix the liquid alkaline activator with the solid raw material, stir evenly, add foaming agent, and stir for 1 min.

[0085] Pouring the mixed material into steel or plastic moulds, sealed, 60 o Rest at C for 30min.

[0086] The green body is turned over and demolded, and cut with a cutting machine to remove excess bottom material and top material.

[0087] Put the cut semi-finished product into the autoclave at a temperature of 100 o C, under the conditions of pressure 0.5MPa, curing humidity 70%, curing for 2...

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Abstract

The invention discloses an autoclaved aerated concrete and a preparation method thereof, and the autoclaved aerated concrete comprises mineral raw materials, an alkaline exciting agent, a foaming agent, a foam-stabilizing agent, a slow-release agent and the like. The mineral raw materials comprise 80-100wt.% of fly ash, and other mineral raw materials comprise mineral waste residue, metakaolin, silica fume, steel slag, circulating fluidized bed bottom ash and the like; the alkaline exciting agent mass is 40-55wt.% of the mineral raw material mass, the foaming agent mass is 0.13-5wt.% of the mineral raw material mass, the foam-stabilizing agent mass is 0.03-0.09wt.% the mineral raw material mass, and the slow-release agent mass is 2-3.5wt.% of the mineral raw material mass. The alkaline exciting agent including sodium silicate and NaOH / KOH, the mineral raw materials, the foaming agent and the foam-stabilizing agent are mixed for stirring, then are filled in a mould for prefabrication forming or casting forming, and maintained by autoclaving for 1-24h at 60-160 DEG C under 0.1-1MPa.

Description

technical field [0001] The invention relates to an autoclaved aerated concrete material and a preparation method thereof. [0002] technical background [0003] With the continuous consumption of energy in the world, countries are paying more and more attention to energy conservation, and building energy conservation has increasingly become one of the focuses of governments. The construction industry consumes a lot of resources and energy, and also produces solid waste, sewage, noise, etc. Building energy conservation is one of the important ways to reduce environmental pollution and solve the energy crisis. Building energy consumption accounts for about 30% of the total energy consumption in society. It is estimated that by 2020 the national construction area will double that of 2000. The domestic existing residential area is about 40 billion square meters 2 , of which less than 200 million m 2 , accounting for about 0.5%, and only 15% of new residential buildings mee...

Claims

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Application Information

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IPC IPC(8): C04B28/26C04B38/02C04B18/08
CPCY02W30/91
Inventor 刘泽邵宁宁孔凡龙王春雪
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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