Coal gangue based geopolymer and preparation method thereof

A coal gangue and polymer technology, applied in the field of building materials, can solve the problems of poor utilization of industrial solid waste and low compressive strength of geopolymers, and achieve the effects of excellent durability, high mechanical strength and low permeability

Inactive Publication Date: 2019-11-08
深圳屹米达环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a coal gangue-based geopolymer, which aims to solve the problem of poor utilization of existing geopolymers for industrial solid waste, and

Method used

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  • Coal gangue based geopolymer and preparation method thereof
  • Coal gangue based geopolymer and preparation method thereof
  • Coal gangue based geopolymer and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0051] The embodiment of the present invention also provides a preparation method of coal gangue-based geopolymer, including the following preparation steps:

[0052] S10. Obtain coal gangue coarse aggregate, coal gangue fine aggregate, coal gangue powder, blast furnace slag and desulfurized gypsum, and combine the gangue coarse aggregate, the gangue fine aggregate, the gangue powder, the The blast furnace slag is mixed with the desulfurized gypsum to obtain a mixture;

[0053] S20. Obtain an alkali activator, and dissolve the alkali activator in water to obtain an aqueous solution of the alkali activator;

[0054] S30. Adding the aqueous solution of the alkali activator to the mixture for mixing treatment to obtain a coal gangue-based geopolymer slurry;

[0055] S40. Curing the geopolymer slurry into a mold to obtain a coal gangue-based geopolymer.

[0056] The method for preparing coal gangue-based geopolymers provided in the embodiments of the present invention firstly mixes the coa...

Example Embodiment

[0068] Example 1

[0069] A coal gangue-based geopolymer includes preparation steps:

[0070] ① Put 7kg of desulfurized gypsum, 15kg of coal gangue powder, 8kg of blast furnace slag, 30kg of coal gangue coarse aggregate, and 20kg of coal gangue fine aggregate into the mixer and mix evenly to obtain a mixture.

[0071] ② Dissolve 3 kg of powdered sodium silicate and 2 kg of sodium hydroxide in 15 kg of water, and fully stir to dissolve to obtain an aqueous alkali activator solution.

[0072] ③ The alkali activator aqueous solution is poured into the mixer containing the mixture, and the mixing time is 5 minutes to obtain the coal gangue-based geopolymer slurry.

[0073] ④Pour the coal gangue-based geopolymer slurry into the abrasive tool, and place the abrasive tool with the material on the plate vibrator to shake for 5 minutes. Put the mold into the curing box to cure the coal gangue geopolymer. The curing conditions are 30°C temperature and 90% humidity to obtain coal gangue-based geo...

Example Embodiment

[0074] Example 2

[0075] A coal gangue-based geopolymer includes preparation steps:

[0076] ① Put 5kg of desulfurized gypsum, 20kg of coal gangue powder, 10kg of blast furnace slag, 25kg of coal gangue coarse aggregate, and 25kg of coal gangue fine aggregate into the mixer and mix evenly to obtain a mixture.

[0077] ② Dissolve 2 kg of powdered sodium silicate and 1 kg of sodium hydroxide in 12 kg of water, and fully stir to dissolve to obtain an aqueous alkali activator solution.

[0078] ③ The alkali activator aqueous solution is poured into the mixer containing the mixture, and the mixing time is 5 minutes to obtain the coal gangue-based geopolymer slurry.

[0079] ④Pour the coal gangue-based geopolymer slurry into the abrasive tool, and place the abrasive tool with the material on the plate vibrator to shake for 5 minutes. Put the mold into the curing box to cure the coal gangue geopolymer. The curing conditions are 20°C temperature and 90% humidity to obtain coal gangue-based ge...

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Abstract

The invention belongs to the technical field of construction materials, and especially relates to a coal gangue based geopolymer. The geopolymer includes the following raw materials and components: 25%-50% of coal gangue coarse aggregate, 20%-40% of coal gangue fine aggregate, 10%-30% of coal gangue powder, 5%-15% of blast furnace slag, 5%-10% of desulfurized gypsum, 1%-10% of an alkali activator,water, and the like. The coal gangue based geopolymer of the invention utilizes industrial solid waste coal gangue as a main raw material, the industrial solid waste coal gangue replaces conventionalsand fine aggregate, stone coarse aggregate, fly ash, and the like, through a polymerization reaction between components such as coal gangue, the blast furnace slag, the desulfurization gypsum, and the alkali activator, the coal gangue based geopolymer is good in stability and is high in strength, the compressive strength can reach 35 MPa after maintenance for three days, the compressive strengthcan reach 60 MPa after maintenance for twenty-eight days, and an early strength agent, cement or the fly ash, and the like do not need to be additionally added.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a coal gangue-based geological polymer and a preparation method thereof. Background technique [0002] Geopolymers are also called alkali-activated cements, also known as inorganic polymers. It originally refers to the aluminosilicate mineral polymer formed by geochemical action or artificial imitation of geological polymerization. With the deepening and development of geopolymer research, it now includes all solid wastes that use natural minerals or have hydraulic activity. It is a three-dimensional network gel with amorphous and quasi-crystalline characteristics formed by the polymerization of silicon-oxygen tetrahedron and aluminum-oxygen tetrahedron, similar to zeolite in chemical composition. At present, geopolymers can obtain excellent properties of rapid hardening and high strength through normal temperature curing. They have the advantages of cheap...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B18/12
CPCC04B18/12C04B28/006C04B2201/50C04B18/142C04B22/145C04B22/002C04B22/062C04B12/04Y02W30/91Y02P40/10
Inventor 李刚秦伟赵俊哲秦选民
Owner 深圳屹米达环保科技有限公司
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