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Red mud geopolymer foam building block and preparation method thereof

A technology of red mud geopolymer, which is applied in the field of red mud geopolymer foam block and its preparation, can solve the problems of low strength, efflorescence, high energy consumption, etc., and achieve improved thermal insulation performance and excellent thermal insulation performance , enhance the effect of flexural toughness

Inactive Publication Date: 2018-01-12
南宁恒慕科技有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, some people have studied the use of waste red mud to prepare foam blocks, but the foam blocks prepared from red mud often need autoclaving to obtain high strength, resulting in high cost of process equipment, high energy consumption, and safe production process high risk
However, red mud foam blocks without autoclaving have problems of efflorescence, low strength and high thermal conductivity.

Method used

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  • Red mud geopolymer foam building block and preparation method thereof
  • Red mud geopolymer foam building block and preparation method thereof
  • Red mud geopolymer foam building block and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Red mud geopolymer foam blocks, by mass percentage, include: activated red mud pre-geopolymer 32%, fine aggregate 11.4%, desulfurized gypsum 12%, polycarboxylate superplasticizer 0.6%, admixture 22% %, coagulant 3%, tobermorite 10%, alkali-resistant fiber 6%, hydrogen peroxide 3%. The mass concentration of the hydrogen peroxide is 30%.

[0038] The components and mass fractions of the coagulation regulator are: diatomite 25%, sodium silicate powder 25%, calcium chloride 18%, anhydrous sodium carbonate 12%, anhydrous magnesium sulfate 12%, calcium stearate 8% %.

[0039] Prepared by the following steps:

[0040] Step A1: drying the red mud, crushing it and sieving it to obtain red mud powder;

[0041] Step A2: add anhydrous sodium carbonate, anhydrous magnesium carbonate, calcium stearate, sodium silicate, calcium chloride and mix to obtain a coagulation regulator;

[0042] Step A3: Add desulfurized gypsum to the activated red mud pre-geopolymer, then add water and m...

Embodiment 2

[0056] Red mud geopolymer foam blocks, by mass percentage, include: activated red mud pre-geopolymer 40%, fine aggregate 9.4%, desulfurized gypsum 12%, admixture 15%, coagulant 4%, polycarboxylate Acid-based superplasticizer 0.6%, tobermorite 8%, alkali-resistant fiber 8%, hydrogen peroxide 3%. The mass concentration of the hydrogen peroxide is 30%.

[0057] The components and mass fractions of the coagulation regulator are: diatomite 40%, sodium silicate powder 20%, calcium chloride 15%, anhydrous sodium carbonate 5%, anhydrous magnesium sulfate 10%, calcium stearate 10% %.

[0058] Prepared by the following steps:

[0059] Step A1: drying the red mud, crushing it and sieving it to obtain red mud powder;

[0060] Step A2: add anhydrous sodium carbonate, anhydrous magnesium carbonate, calcium stearate, sodium silicate, calcium chloride and mix to obtain a coagulation regulator;

[0061] Step A3: Add desulfurized gypsum to the activated red mud pre-geopolymer, then add wate...

Embodiment 3

[0075] Red mud geopolymer foam blocks, by mass percentage, include: activated red mud pre-geopolymer 45%, fine aggregate 6.4% (among them, waste brick clay sand 70%, fine stone sand 30%), desulfurized gypsum 10% %, admixture 14% (including quicklime 8%, silica fume 20%, fly ash 32%, slag 40%), coagulation regulator 5%, polycarboxylate superplasticizer 0.6%, snow silica calcium Stone 6%, alkali-resistant fiber 10%, hydrogen peroxide 3%. The mass concentration of the hydrogen peroxide is 30%.

[0076] The components and mass fractions of the coagulation regulator are: 20% diatomite, 30% sodium silicate powder, 30% calcium chloride, 5% anhydrous sodium carbonate, 10% anhydrous magnesium sulfate, 5% calcium stearate %.

[0077] Prepared by the following steps:

[0078] Step A1: drying the red mud, crushing it and sieving it to obtain red mud powder;

[0079] Step A2: add anhydrous sodium carbonate, anhydrous magnesium carbonate, calcium stearate, sodium silicate, calcium chlor...

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Abstract

The invention provides a red mud geopolymer foam building block and a preparation method thereof. The red mud geopolymer foam building block is prepared from the following components in percentage bymass: 30-50% of activated red mud pre-geopolymer, 6-15% of fine aggregate, 10-20% of desulfurized gypsum, 10-25% of admixture, 2-8% of thickening time control agent, 5-10% of tobermorite, 5-8% of alkali-proof fiber and 3-5% of hydrogen peroxide. By adopting the technical scheme of the invention, the problem of efflorescence of a red mud lightweight wall building block is solved; meanwhile, by adding the tobermorite with excellent thermal insulation property, the thermal insulation property of the red mud and foam building blocks is remarkably enhanced.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to a red mud geopolymer foam block and a preparation method thereof. Background technique [0002] With the continuous advancement of national energy conservation and emission reduction policies, the demand for inorganic thermal insulation materials will increase significantly in the development of strategic emerging industries such as energy conservation and environmental protection. [0003] Red mud is the polluting waste slag discharged during the process of extracting alumina in the aluminum industry. Generally, for every ton of alumina produced, 1.0-2.0 tons of red mud is incidentally produced. As the fourth largest producer of alumina in the world, China discharges tens of millions of tons of red mud every year. A large amount of red mud cannot be fully and effectively utilized and must be piled up in a large area, which not only wastes manpower and material resources...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B12/00C04B20/02C04B38/02C04B111/20
CPCY02P40/10
Inventor 韦菲黄映恒农毅覃丽勤李燕
Owner 南宁恒慕科技有限责任公司
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