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Composite heat-preservation light autoclaved aerated concrete and preparation method thereof

An autoclaved aeration, composite thermal insulation technology, applied in ceramic products, other household appliances, applications, etc., can solve the problems of poor weight and thermal insulation effect, achieve excellent ultimate load and compressive strength, low density, light weight effect

Inactive Publication Date: 2020-09-01
安徽筑园景新型建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the autoclaved aerated concrete added with solid waste has poor weight and thermal insulation effect, which needs to be solved urgently.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A composite thermal insulation lightweight autoclaved aerated concrete, its raw materials include: 30kg of fluorite ore tailings, 25kg of quartz sand, 5kg of construction solid waste, 30kg of lime, 15kg of 42.5 Portland cement, 8kg of composite sepiolite, particle size 1kg of aluminum powder of 10-100μm.

[0024] Composite sepiolite is prepared by the following process: put 20kg of sepiolite powder into 100kg of sulfuric acid solution with a concentration of 1.2mol / L, stir at 60°C for 1 hour, filter, wash to neutral, dry, then add 4kg of sodium alginate, 1kg of micro Crystalline cellulose and 25kg of water were mixed well, hydrothermally carbonized at 160°C for 4 hours, filtered, washed, dried, and pulverized to obtain composite sepiolite.

[0025] The preparation method of the above-mentioned composite thermal insulation lightweight autoclaved aerated concrete comprises the following steps:

[0026] S1. Mix fluorite ore tailings, quartz sand, construction solid waste,...

Embodiment 2

[0030] A composite thermal insulation lightweight autoclaved aerated concrete, its raw materials include: 50kg of fluorite ore tailings, 15kg of quartz sand, 15kg of construction solid waste, 20kg of lime, 25kg of 42.5 Portland cement, 4kg of composite sepiolite, particle size 4kg of aluminum powder of 10-100μm.

[0031] Composite sepiolite is prepared by the following process: put 10kg of sepiolite powder into 100kg of sulfuric acid solution with a concentration of 1.6mol / L, stir at 50°C for 2 hours, filter, wash to neutral, dry, then add 2kg of sodium alginate, 4kg of micro Crystalline cellulose and 15kg of water were thoroughly mixed and homogenized, hydrothermally carbonized at 180°C for 2 hours, filtered, washed, dried, and pulverized to obtain composite sepiolite.

[0032] The preparation method of the above-mentioned composite thermal insulation lightweight autoclaved aerated concrete comprises the following steps:

[0033] S1. Mix fluorite ore tailings, quartz sand, c...

Embodiment 3

[0037] A composite thermal insulation lightweight autoclaved aerated concrete, its raw materials include: 45kg of fluorite ore tailings, 18kg of quartz sand, 12kg of construction solid waste, 22kg of lime, 22kg of 52.5 Portland cement, 5kg of composite sepiolite, particle size 3kg of aluminum powder of 10-100μm.

[0038] Composite sepiolite is prepared by the following process: put 12kg of sepiolite powder into 100kg of sulfuric acid solution with a concentration of 1.5mol / L, stir at 52°C for 1.7h, filter, wash to neutral, dry, then add 2.5kg of sodium alginate, 3kg of microcrystalline cellulose and 18kg of water were thoroughly mixed and homogenized, hydrothermally carbonized at 175°C for 2.5 hours, filtered, washed, dried, and pulverized to obtain composite sepiolite.

[0039] The preparation method of the above-mentioned composite thermal insulation lightweight autoclaved aerated concrete comprises the following steps:

[0040] S1. Mix and ball mill fluorite ore tailings, ...

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Abstract

The invention discloses composite heat preservation light autoclaved aerated concrete. The invention discloses a preparation method of the composite thermal-insulation lightweight autoclaved aerated concrete. The preparation method comprises the following steps: mixing and ball-milling fluorite mine tailings, quartz sand, building solid waste and water to obtain mortar; adding lime, cement, composite sepiolite and aluminum powder into the mortar, uniformly stirring, pouring into a mold, pouring, and carrying out gas forming to form a green body; and demolding the green body, cutting, and steaming to obtain the composite heat-preservation light autoclaved aerated concrete. The composite sepiolite is prepared by the following process: feeding sepiolite powder into a sulfuric acid solution, stirring for 1-2 hours at 50-60 DEG C, filtering, washing to be neutral, drying, then adding sodium alginate, microcrystalline cellulose and water, fully and uniformly mixing, carrying out hydrothermalcarbonization for 2-4 hours at 160-180 DEG C, filtering, washing, drying and crushing to obtain the composite sepiolite. The autoclaved aerated concrete is low in density, low in heat conductivity coefficient and good in sound insulation and compressive strength.

Description

technical field [0001] The invention relates to the technical field of autoclaved aerated concrete, in particular to a composite thermal insulation lightweight autoclaved aerated concrete and a preparation method thereof. Background technique [0002] Traditional solid clay bricks are heavy, which not only wastes national clay resources and high prices, but also cannot meet the requirements of some special building bricks. Therefore, many advanced areas have completely banned the use of red bricks, and instead strongly advocated aerated bricks. Autoclaved aerated concrete is an aerated concrete block produced by high-temperature autoclaved equipment. The aerated concrete block is a solid block made of cement, slag, sand, lime, etc., added with an air-generating agent, stirred and formed, and autoclaved. Compared with the traditional clay brick, the aerated concrete block not only weighs Lightweight, excellent sound insulation performance, strong shock resistance and good pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B38/02C04B38/08C04B40/02C04B111/40C04B111/52
CPCC04B18/027C04B28/04C04B38/02C04B40/024C04B2111/40C04B2111/52C04B2201/20C04B2201/32C04B2201/50C04B18/12C04B14/06C04B18/16C04B22/04C04B18/023C04B14/042C04B24/383C04B24/38
Inventor 孟梦高勤孟伟姜文楠喻雅雯
Owner 安徽筑园景新型建材科技有限公司
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