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Geological polymer porous heat-insulation material based on municipal solid waste incineration bottom ash and preparation method of geological polymer porous heat-insulation material

A technology of municipal solid waste and geopolymer, applied in the field of building materials, can solve the problems of large consumption of natural mineral materials, high price, resource depletion, etc., and achieve the effects of good stability, good compressive strength and environmental friendliness

Inactive Publication Date: 2019-03-01
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Traditional raw materials for preparing geopolymers are mainly metakaolin, fly ash, slag, etc. Aluminum powder is used as an aerating agent, mixed with an alkaline activator to form a slurry, poured into a mold, and maintained at room temperature to 80°C, but this The price of similar geopolymers is relatively high, and the consumption of natural mineral materials is relatively large, which will easily cause resource depletion

Method used

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  • Geological polymer porous heat-insulation material based on municipal solid waste incineration bottom ash and preparation method of geological polymer porous heat-insulation material

Examples

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Effect test

Embodiment 1

[0025] A geopolymer based on municipal solid waste incineration bottom ash, its basic composition includes the following components by mass percentage: incineration bottom ash 75%, metakaolin 25%.

[0026] Preparation method: first wash the incineration bottom ash with water, then dry the incineration bottom ash and metakaolin separately, and ball mill, then grind the incineration bottom ash and metakaolin into powders smaller than 75 μm, and mix uniformly according to the proportion to obtain a raw material mixture. Sodium hydroxide solution (8mol / L) and water glass solution are mixed at a mass ratio of 1:3 to obtain an alkali activator. An alkali activator (the amount of the alkali activator is 25% of the mass of the mixture) is added to the raw material mixture and stirred uniformly for 30 minutes to obtain geopolymer slurry. The slurry was poured into a mold (40mm×40mm×160mm), dried in a drying oven at 70°C for 24 hours, and then demolded, and then cured under moist heat a...

Embodiment 2

[0028] A geopolymer based on municipal solid waste incineration bottom ash, its basic composition includes the following components by mass percentage: incineration bottom ash 72%, metakaolin 28%.

[0029] Preparation method: first wash the incineration bottom ash with water, then dry the incineration bottom ash and metakaolin separately, and ball mill, then grind the incineration bottom ash and metakaolin into powders smaller than 75 μm, and mix uniformly according to the proportion to obtain a raw material mixture. Sodium hydroxide solution (8mol / L) and water glass solution are mixed at a mass ratio of 1:3 to obtain an alkali activator. An alkali activator (the amount of the alkali activator is 28% of the mass of the mixture) was added into the raw material mixture and stirred uniformly for 45 minutes to obtain geopolymer slurry. The slurry was poured into a mold (40mm×40mm×160mm), dried in a drying oven at 70°C for 24 hours, and then demolded, and then cured under moist hea...

Embodiment 3

[0031] A geopolymer based on municipal solid waste incineration bottom ash, its basic composition includes the following components by mass percentage: incineration bottom ash 68%, metakaolin 32%.

[0032] Preparation method: first wash the incineration bottom ash with water, then dry the incineration bottom ash and metakaolin separately, and ball mill, then grind the incineration bottom ash and metakaolin into powders smaller than 75 μm, and mix uniformly according to the proportion to obtain a raw material mixture. Mix sodium hydroxide solution (8mol / L) and water glass solution in a mass ratio of 1:4 to obtain an alkali activator. An alkali activator (the amount of the alkali activator is 30% of the mass of the mixture) is added to the raw material mixture and stirred uniformly for 60 minutes to obtain geopolymer slurry. The slurry was poured into a mold (40mm×40mm×160mm), dried in a drying oven at 70°C for 24 hours, and then demolded, and then cured under moist heat at 80°C...

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Abstract

The invention discloses a geological polymer porous heat-insulation material based on municipal solid waste incineration bottom ash and a preparation method of the geological polymer porous heat-insulation material. The geological polymer porous heat-insulation material is prepared from the following raw materials: the incineration bottom ash, metakaolin and an alkali activator. The preparation method of the geological polymer porous heat-insulation material comprises the steps that the incineration bottom ash is washed, dried and ball-milled firstly into incineration bottom ash powder; then the metakaolin is dried and ball-milled into metakaolin powder; the incineration bottom ash powder is mixed with the metakaolin powder; mixed powder and the alkali activator are mixed and stirred; prepared geological polymer slurry is poured; and after drying is conducted at 60-80 DEG C for 12-24 h, demoulding is conducted, and the porous heat-insulation material is obtained after maintenance. Themunicipal solid waste incineration bottom ash is utilized to be matched with the small amount of added metakaolin, a polymerization reaction is generated under the effect of the alkali activator to prepare a geological polymer, and thus secondary utilization of the municipal solid waste incineration bottom ash is achieved.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a geopolymer porous thermal insulation material based on municipal solid waste incineration bottom ash and a preparation method thereof. Background technique [0002] The incineration of municipal solid waste has become a global trend in waste management, especially in land-scarce areas. Incineration can not only greatly reduce the volume and quality of waste, effectively inactivate pathogens, but also recover heat to generate electricity. Municipal solid waste incineration generally produces two types of ash, namely incineration bottom ash and incineration fly ash, which are usually disposed of in landfills. Of the total ash, approximately 80% by weight is incineration bottom ash, which contains less organic matter, leachable heavy metals, and chlorides than incineration fly ash, and therefore has a much higher utilization potential. Incineration bottom a...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B38/02
CPCC04B28/006C04B2201/20C04B2201/32C04B2201/50C04B14/106C04B12/04C04B22/062C04B18/105C04B38/02
Inventor 许宁陈介民王成双岳鹿张文惠沈超浦旭清王佳磊谢宇
Owner YANCHENG INST OF TECH
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