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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 the compressive strength of geopolymers is low, so it is necessary to use them in geopolymers Technical issues such as adding auxiliary reinforcing agents such as cement and early strength agents

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

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preparation example Construction

[0051] The embodiment of the present invention also provides a method for preparing a coal gangue-based geopolymer, comprising 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 coal gangue coarse aggregate, the coal gangue fine aggregate, the coal gangue powder, the The blast furnace slag is mixed with the desulfurized gypsum to obtain a mixture;

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

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

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

[0056] The preparation method of the coal gangue-based geopolymer provided by the embodiment of the pre...

Embodiment 1

[0069] A coal gangue-based geopolymer, comprising the steps of:

[0070] ①Put 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 a stirrer and mix evenly to obtain a mixture.

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

[0072] ③The aqueous alkali activator solution was poured into the stirrer containing the mixture, fully stirred and mixed for 5 minutes, and the coal gangue-based geopolymer slurry was obtained.

[0073] ④ Pour the gangue-based geopolymer slurry into the abrasive tool, and place the abrasive tool with the material on a flat vibrator to vibrate for 5 minutes. Put the mold into the curing box to cure the gangue geopolymer under the curing conditions of temperature 30° C. and humidity 90% to obtain the gangue-based geopol...

Embodiment 2

[0075] A coal gangue-based geopolymer, comprising the steps of:

[0076] ①Put 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 a mixer and stir to mix evenly to obtain a mixture.

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

[0078] ③The aqueous alkali activator solution was poured into a stirrer filled with the mixture, fully stirred and mixed for 5 minutes, and the coal gangue-based geopolymer slurry was obtained.

[0079] ④ Pour the gangue-based geopolymer slurry into the abrasive tool, and place the abrasive tool with the material on a flat vibrator to vibrate for 5 minutes. Put the mold into the curing box to cure the gangue geopolymer under the curing conditions of temperature 20° C. and humidity 90%, to obtain the gangue-based...

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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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