Foamed coal ash geopolymer outer-wall thermal-insulation board and manufacturing process thereof

A technology of geopolymer and exterior wall insulation board, applied in the field of material engineering, can solve the problems of short service life, high energy consumption, low bending resistance, etc., and achieves beneficial environmental protection, low thermal conductivity, and strong freeze-thaw resistance. Effect

Inactive Publication Date: 2013-07-24
德州先科地质聚合物研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to produce a foamed fly ash geopolymer exterior wall thermal insulation board to solve the problems of existing thermal insulation boards such as flammability, poor thermal insulation, short service life, high cost, low strength, low flexural resistance, and Low temperature resistance, high water absorption, high energy consumption, etc., and the use of waste fly ash, slag powder, and microsilica powder to reduce a series of environmental problems caused by them

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Pulping: Add clean water at 25°C to the mixer, the water-cement ratio (the ratio of water to the sum of the weight of fly ash, slag powder, and fine aggregate) is 1 / 2, and the fly ash is 91%. Mix Activator X7%, slag fine powder 1%, fine aggregate 0.02%, foam stabilizer 0.98%. Add various raw materials into the blender and stir for 5 minutes to make it fully stirred evenly.

[0020] 2. Foaming: add hydrogen peroxide, the ratio of hydrogen peroxide to ash (the ratio of hydrogen peroxide to the sum of the weight of fly ash, slag powder and fine aggregate) is 27 / 1000, stir for 5 minutes, put the slurry into the mold, Stand still for 9 hours.

[0021] 3. Steam curing: Steam the slurry that has stopped foaming with steam at 100°C for 6 days.

[0022] 4. Cutting: Cut the hardened bulk slurry into the thickness and size required by the customer.

[0023] 5. Product inspection: Eliminate defective products and obtain qualified products of foamed fly ash geopolymer external...

Embodiment 2

[0025] 1. Pulping: Add clean water at 60°C to the mixer, and the water-cement ratio (the ratio of water to the sum of the weights of fly ash, slag powder, and fine aggregate) is 1.1 / 1. Add various raw materials into the mixer, fly ash 65%, mixed activator X 20%, slag micropowder 5%, fine aggregate 5%, foam stabilizer 5%, and stir for 10 minutes to make it fully stirred evenly.

[0026] 2. Foaming: add hydrogen peroxide, the ratio of hydrogen peroxide to ash (the ratio of hydrogen peroxide to the sum of the weight of fly ash, slag powder and fine aggregate) is 77 / 1000, stir for 8 minutes, put the slurry into the mold, Let stand for 2 hours.

[0027] 3. Steam curing: Steam the slurry that has stopped foaming for 2 days with 115°C steam.

[0028] 4. Cutting: Cut the hardened bulk slurry into the thickness and size required by the customer.

[0029] 5. Product inspection: Eliminate defective products and obtain qualified products of foamed fly ash geopolymer external wall insula...

Embodiment 3

[0031] 1. Pulping: Add clear water at 45°C to the mixer, and the water-cement ratio (the ratio of water to the sum of the weights of fly ash, slag powder, and fine aggregate) is 1 / 1. Add various raw materials into the mixer, including 80% fly ash, 15% mixed activator X, 2% slag powder, 2% fine aggregate, and 1% foam stabilizer. Stir for 10 minutes to mix well.

[0032] 2. Foaming: add hydrogen peroxide, the ratio of hydrogen peroxide to ash (the ratio of hydrogen peroxide to the sum of the weight of fly ash, slag powder and fine aggregate) is 53 / 1000, stir for 7 minutes, put the slurry into the mold, Let stand for 5 hours.

[0033] 3. Steam curing: the foamed slurry is steamed with 60°C steam for 6 days.

[0034] 4. Cutting: Cut the hardened bulk slurry into the thickness and size required by the customer.

[0035] 5. Product inspection: Eliminate defective products and obtain qualified products of foamed fly ash geopolymer external wall insulation boards.

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PUM

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Abstract

The invention belongs to the technical field of material engineering and relates to a foamed coal ash geopolymer outer-wall thermal-insulation board and a manufacturing process thereof. The coal ash and mineral powder are foamed and maintained into a foamed coal ash geopolymer outer-wall thermal-insulation board under the excitation of alkali activator by utilizing cinerite activity of the coal ash and the mineral powder. The foamed coal ash geopolymer outer-wall thermal-insulation board comprises the following materials in percentage by weight: 60%-95% of coal ash, 4%-30% of mixed activator X, 0.01%-30% of superfine slag powder, 0.01%-30% of fine aggregate and 0.3%-10% of foam stabilizer. The fine aggregate refers to the materials including nanometer calcium carbonate, grinded kaolin, silica powder, silica fume and the like. And the mixed activator x is an alkali mixed solution containing a plurality of irons and active materials. The foamed coal ash geopolymer outer-wall thermal-insulation board has the characteristics of being strong in freeze-shaw resistance, low in heat conduction coefficient, as long as the service life of the building, and good waterproofness. Moreover, the industrial waste including waste coal ash, superfine slag powder and the like can be utilized.

Description

technical field [0001] The invention belongs to the technical field of material engineering, and relates to a foamed fly ash geopolymer external wall insulation board and a manufacturing process. Background technique [0002] The energy consumption per unit area of ​​buildings in my country is still 3 to 5 times that of developed countries with similar climates. With the continuous deepening of energy-saving work in residential construction in my country, building energy-saving methods of external wall insulation are becoming more and more popular. The existing external wall insulation boards are divided into the following types: foamed polystyrene boards and foamed polyurethanes, foamed cement insulation boards, rock wool boards, foamed ceramic insulation boards, and foam glass boards. There are following defects and deficiencies in the above existing external wall insulation boards: [0003] 1. Foamed polystyrene board and foamed polyurethane: flammable, weak bonding, lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B28/00
CPCY02P40/10
Inventor 张书源郭洪
Owner 德州先科地质聚合物研究所
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