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Fibre reinforced coal ash based geopolymer foam material and preparation method thereof

A fiber-reinforced and foamed material technology, applied in the field of porous ceramics, can solve the problems of reduced strength, increased water absorption, low density and thermal conductivity, and achieve the effects of reducing air pollution, simple process, and reducing solid waste pollution

Inactive Publication Date: 2014-02-26
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the biggest weakness of inorganic lightweight insulation materials is that the strength decreases rapidly and the water absorption increases while obtaining low density and thermal conductivity.

Method used

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  • Fibre reinforced coal ash based geopolymer foam material and preparation method thereof
  • Fibre reinforced coal ash based geopolymer foam material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The Suzhou soil (the main crystal phase is kaolin) was calcined at 700°C for 2 hours to obtain metakaolin. Weigh 100g of the material, 50g of slag, 500g of fly ash, the particle size of various raw materials is 0.045mm and the sieve residue is less than 30%, weigh 40g of glass fiber with a length of 0.5mm to 1mm and 2.5g of aluminum powder, and add them to the solid raw material. Mix well.

[0022] Measure 120ml water glass, modulus 2.8, density 1.35g / m1; Measure 120ml concentration and be 30wt% sodium hydroxide solution; Water glass solution and sodium hydroxide solution are mixed, leave standstill 2 hours to obtain alkaline activator solution, Measure 25ml compound foam stabilizer (density close to 1g / cm 3 ), oleic acid in the compound foam stabilizer: triethanolamine: water = 1:3:36 (volume ratio) and alkali activator solution, mix and stir evenly, then add to the above solid materials, and stir while adding the solution until the mixture is uniform. Pour the mixed...

Embodiment 2

[0028] The Suzhou soil (the main crystal phase is kaolin) was calcined at 700°C for 2 hours to obtain metakaolin. Weigh 40g of the material, 70g of slag, 30g of silica fume, 500g of fly ash, the particle size of various raw materials is 0.045mm and the sieve residue is less than 30%, weigh 40g of aluminum-silicon fiber with a length of 0.5mm to 1mm and 4g of aluminum powder foaming agent, Add to the solid ingredients and stir to combine.

[0029] Measure 110ml water glass, modulus 2.8, density 1.35g / m1; Measure 130ml concentration and be 30wt% sodium hydroxide solution; Water glass solution and sodium hydroxide solution are mixed, leave standstill 2 hours to obtain alkaline activator solution, Measure 30ml of compound foam stabilizer (density close to 1g / cm 3 ), oleic acid in the compound foam stabilizer: triethanolamine: water = 1:3:36 (volume ratio) and alkali activator solution, mix and stir evenly, then add to the above solid materials, and stir while adding the solution ...

Embodiment 3

[0034] The Suzhou soil (the main crystal phase is kaolin) was calcined at 700°C for 2 hours to obtain metakaolin. Weigh 40g of the material, 70g of slag, 30g of silica fume, 500g of fly ash, and the particle size of various raw materials is 0.045mm, and the sieve residue is less than 30%. Sodium alkyl sulfonate compound foaming agent is added to the solid raw material, stirred and mixed evenly.

[0035] Measure 110ml water glass, modulus 2.8, density 1.35g / m1; Measure 130ml concentration and be 30wt% sodium hydroxide solution; Water glass solution and sodium hydroxide solution are mixed, leave standstill 2 hours to obtain alkaline activator solution, Measure 30ml of compound foam stabilizer (density close to 1g / cm 3 ), oleic acid in the compound foam stabilizer: triethanolamine: water = 1:3:36 (volume ratio) and alkali activator solution, mix and stir evenly, then add to the above solid materials, and stir while adding the solution until the mixture is uniform.

[0036] Pour...

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Abstract

The invention discloses a fibre reinforced coal ash based geopolymer foam material and a preparation method thereof. The fibre reinforced coal ash based geopolymer foam material disclosed by the invention comprises the following components in percentage by weight: 50-70% of aluminium silicon raw material, 5-15% of slag, 3-8% of inorganic fibre, 15-30% of liquid alkaline exciting agent, 0.2-2% of foaming agent, and 2.5-3.5% of foam stabilizer. The preparation method disclosed by the invention comprises the step of also adding the foam stabilizer while adding the foaming agent by adopting the liquid alkaline exciting agent by taking the inorganic fibre as the reinforcing agent, the slag as the Ca adjusting agent and other solid raw materials (such as coal ash, metakaolin and silica fume) as powder for providing aluminium silicon. The light foam material prepared by the invention has the characteristics of being high in intensity, small in size change rate, low in water absorption and the like in the event of having same volume weight and heat conductivity of the similar materials, and is applied to various applications.

Description

technical field [0001] The invention belongs to the technical field of porous ceramics, and more specifically relates to a geopolymer-based foam material reinforced by organic fibers and a preparation method thereof. Background technique [0002] Geopolymer, referred to as "geopolymer", is a new type of hydraulic gelling material with a zeolite-like three-dimensional network structure connected by silicon-oxygen tetrahedrons and aluminum-oxygen tetrahedrons through bridge oxygen bonds. Geopolymers are usually made of silica-alumina raw materials with pozzolanic activity, such as metakaolin, kaolin, fly ash, volcanic ash, clay, etc., which are obtained through appropriate processing at relatively low temperatures, and have a high-temperature-free sintering process features. And because of its unique structure, it not only has the characteristics of organic polymers, ceramics, and cement, but also exhibits some unique properties, such as high strength, rapid curing, high temp...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B28/00C04B14/36C04B14/40
CPCY02P40/10
Inventor 杜海燕高婉琪陈小平巩晓晓王敏
Owner TIANJIN UNIV
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