Material for promoting formation of geopolymer in high-humidity environment and preparation method thereof

A geopolymer and environmental technology, applied in the field of geopolymer preparation and application, can solve the problems of low temperature, high humidity in goaf, poor molding, etc., and achieve the advantages of improving molding degree, reducing environmental harm and improving environmental protection benefits. Effect

Pending Publication Date: 2021-11-19
中能化江苏地质矿产设计研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the process of practical application, it is found that the environment of the goaf is relatively special, there is a large amount of old empty water, the overall humidity of the gob is relatively high, and the temperature is low
Therefore, in the actual test process, it is found that the geopolymer grouting materials have poor molding problems in the low temperature and high humidity environment. After the test block is cured in the curing box under simulated conditions (25 ° C, 98 ± 1% humidity) for 28 days Still kind of soft and not dry

Method used

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  • Material for promoting formation of geopolymer in high-humidity environment and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0027] This example discloses a material for promoting the formation of geopolymers in a high-humidity environment and a preparation method thereof, and the initial setting and final setting times of the geopolymers are measured.

[0028] Geopolymer materials include: fly ash, phosphorus tailings sand, alkali activator and water, wherein the alkali activator is sodium hydroxide, the water-solid ratio is 0.5, water and sodium hydroxide (as Na 2 O meter) the mol ratio is 20.

[0029] The preparation method of geopolymer comprises the steps:

[0030] S1. Dry the fly ash and phosphorous tailings at 105°C for 12 hours to remove moisture;

[0031] S2. cooling, crushing and pulverizing the dried raw materials to 200 mesh, weighing 250g each of fly ash and phosphorus tailing sand, weighing 55.56g sodium hydroxide, adding 250g water to dissolve;

[0032] S3. Mix the above-mentioned fly ash, phosphorus tailings sand and sodium hydroxide solution, add 5g of xanthan gum and stir for 10m...

Embodiment 2

[0034] This example discloses a material for promoting the formation of geopolymers in a high-humidity environment and a preparation method thereof, and the initial setting and final setting times of the geopolymers are measured.

[0035] Geopolymer materials include: fly ash, phosphorus tailings sand, alkali activator and water, wherein the alkali activator is sodium hydroxide and silica fume, the water-solid ratio is 0.5, water and sodium hydroxide (as Na 2 O) molar ratio of 25, silica fume (SiO 2 In terms of) and sodium hydroxide (as Na 2 O meter) the molar ratio is 2.

[0036] The preparation method of geopolymer comprises the steps:

[0037] S1. Dry the fly ash and phosphorous tailings at 105°C for 12 hours to remove moisture;

[0038] S2. cooling, crushing and pulverizing the dried raw materials to 200 mesh, weighing 250g each of fly ash and phosphorus tailings sand;

[0039] S3. Weigh 44.44g of sodium hydroxide and 66.67g of silica fume, add 250g of water to dissolv...

Embodiment 3

[0042] This example discloses a material for promoting the formation of geopolymers in a high-humidity environment and a preparation method thereof, and the initial setting and final setting times of the geopolymers are measured.

[0043] Geopolymer material comprises: fly ash, phosphorus tailings sand, alkali activator and water, wherein the original water glass used for preparing alkali activator is 3.3 mold, and water-solid ratio is 0.5, and water and sodium hydroxide (as Na 2 O meter) the mol ratio is 25, and the required modulus of preparation water glass activator is 2.

[0044] The preparation method of geopolymer comprises the steps:

[0045] S1. Dry the fly ash and phosphorous tailings at 105°C for 12 hours to remove moisture;

[0046]S2. cooling, crushing and pulverizing the dried raw materials to 200 mesh, weighing 250g each of fly ash and phosphorus tailings sand;

[0047] S3. Take by weighing 239.37g of industrial-grade water glass solution of 3.3 molds, 17.19g ...

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Abstract

The invention discloses a material for promoting formation of a geopolymer in a high-humidity environment and a preparation method of the material. The raw materials comprise solid waste, an exciting agent, an additive and water, the solid wastes are industrial solid wastes and comprise fly ash and phosphorus tailing sand; the exciting agent is an alkaline exciting agent and is one of a sodium hydroxide exciting agent, a sodium hydroxide-silica fume composite exciting agent and a water glass exciting agent; the additive is xanthan gum, and the addition amount of the additive is 1% of the solid waste; and the mass ratio (water-solid ratio) of the water to the solid waste is 0.5-0.75. According to the method, the feasibility of preparing a geopolymer grouting filling material from the solid wastes is improved, the problem that the goaf grouting filling material is difficult to form in the actual grouting process is solved, the forming degree of the geopolymer in the high-humidity environment is improved, the final setting time is shortened, the industrial solid wastes can be consumed, and meanwhile, goaf repair treatment is carried out. The raw materials are industrial solid wastes and are low in price and wide in source.

Description

technical field [0001] The invention relates to the technical field of geopolymer preparation and application, in particular to a material for promoting the formation of geopolymers in a high-humidity environment and a preparation method thereof. Background technique [0002] Geopolymer refers to a three-dimensional network polymeric gelling material composed of silicon-oxygen tetrahedron and aluminum-oxygen tetrahedron formed by polycondensation of minerals under high alkaline conditions using natural minerals or solid waste and artificial silicon-aluminum compounds as raw materials. . Compared with Portland cement, geopolymers have the advantages of rich sources of raw materials, simple preparation process, low production energy consumption and "three wastes" emissions, high strength, good durability, easy access to raw materials, and low cost. Therefore, in recent years, relevant scholars at home and abroad have carried out a series of research on the use of geopolymers ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B12/00C04B28/00C04B18/08C04B18/14C04B111/70
CPCC04B12/005C04B28/006C04B18/08C04B18/145C04B2111/70C04B2111/00724C04B24/38C04B22/062C04B18/146C04B12/04Y02W30/91Y02P40/10
Inventor 王新富赵恒吴求刚王彦君周晓芳
Owner 中能化江苏地质矿产设计研究院有限公司
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