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Gangue-based geopolymer grouting material and preparation method thereof

A grouting material and a technology for coal gangue, which are applied in the field of coal gangue-based geopolymer grouting materials and their preparation, can solve the problems of small overall utilization, poor activity and low comprehensive utilization rate, and reduce the risk of land pollution. , low cost, low price effect

Active Publication Date: 2021-01-22
河北绿园检测认证集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Coal gangue is the largest industrial waste in my country. Because of its stable structure and poor activity, its overall utilization has not been large for a long time, and its comprehensive utilization rate is not high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The coal gangue-based geopolymer grouting material provided in this embodiment includes the following components by weight: 82 parts of coal gangue powder, 8 parts of slag powder, 5 parts of fly ash, 2.2 parts of alkaline activator, 0.6 part of surface active Agent, 1.2 parts retarder, 1 part water retaining agent.

[0031] Coal gangue powder: Coal gangue is crushed and ground to make coal gangue powder, and its specific surface area is 1200m 2 / Kg, carbon content ≤ 6%.

[0032] Slag powder: the specific surface area is 380m 2 / Kg;

[0033] Fly ash powder: the specific surface area is 410m 2 / Kg;

[0034] Alkaline activator: NaOH;

[0035] Surfactant: Sodium Dodecyl Sulfonate;

[0036] Retarder: sodium dihydrogen phosphate;

[0037] Water retention agent: methyl cellulose.

[0038] The preparation process of the gangue-based geopolymer grouting material provided in this embodiment is as follows:

[0039] (1) The coal gangue is crushed and ground by a ball mill ...

Embodiment 2

[0071] The coal gangue-based geopolymer grouting material provided in this embodiment includes the following components in parts by weight: 80 parts of coal gangue powder, 10 parts of slag powder, 5 parts of fly ash powder, 2.1 parts of alkaline activator, 0.5 part of surface Active agent, 1.3 parts retarder, 1.1 parts water retaining agent, wherein the specific surface area of ​​coal gangue powder is 1400m 2 / Kg, the specific surface area of ​​slag powder is 400m 2 / Kg, the specific surface area of ​​fly ash powder is 420m 2 / Kg, the alkali activator is sodium sulfate, the surfactant is sodium dodecyl sulfonate, the retarder is potassium dihydrogen phosphate, and the water retaining agent is hydroxymethyl cellulose.

[0072] The detection process of the grouting material prepared in this example is the same as in Example 1, and the test results are as follows: the water separation rate of the slurry is 3.5%, the viscosity of the slurry is 26s, the initial setting time of the...

Embodiment 3

[0074] The coal gangue-based geopolymer grouting material provided in this embodiment includes the following components in parts by weight: 85 parts of coal gangue powder, 6.5 parts of slag powder, 3.3 parts of fly ash powder, 2.1 parts of alkaline activator, 0.5 part of surface Active agent, 1.6 parts retarder, 1 part water retaining agent, in which the specific surface area of ​​coal gangue powder is 1300m 2 / Kg, the specific surface area of ​​slag powder is 360m 2 / Kg, the specific surface area of ​​fly ash powder is 390m 2 / Kg, the alkaline activator is sodium carbonate, the surfactant is sodium dodecyl sulfonate, the retarder is sodium dihydrogen phosphate, and the water retaining agent is methyl cellulose.

[0075] The detection process of the grouting material prepared in this example is the same as in Example 1, and the test results are as follows: the water separation rate of the slurry is 3.2%, the viscosity of the slurry is 23s, the initial setting time of the slur...

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Abstract

The invention discloses a coal gangue based geopolymer grouting material and a preparation method thereof, and belongs to the field of rock mass fracture grouting engineering. The grouting material comprises the following components in parts by weight: 80-85 parts of coal gangue powder, 6-10 parts of slag powder, 3-7 parts of fly ash, 1-4 parts of an alkaline activator, 0.31 part of a surfactant,1-2 parts of a retarder and 0.8-1.2 parts of a water-retaining agent. On the basis of meeting the pressure of coal mine deep high-confined limestone and fracture confined water, the three industrial solid waste raw materials, namely the coal gangue, the slag powder and the coal ash, which are easy to obtain are utilized, the raw materials are low in price, and the cost is relatively low while thetechnical performance requirements of the grouting material are met. The grouting material can be used for preventing and treating water in the coal mine production process, the grouting cost is effectively reduced, the enterprise benefit is improved, and the land pollution risk is reduced.

Description

technical field [0001] The invention belongs to the field of rock mass fissure grouting engineering, and in particular relates to a coal gangue-based geopolymer grouting material and a preparation method thereof. Background technique [0002] Coal gangue is a rock sandwiched in the coal-measure stratum, a solid waste discharged during the coal mine production process, and a kind of coal with low carbon content and high hardness compared with coal during the coal formation process. Black, gray-black rock". The lithology of coal gangue is mostly sedimentary rocks such as mudstone, sandy mudstone, sandstone, siltstone, and limestone. [0003] Due to the complexity of geological conditions, various engineering geological disasters occur frequently. Among them, water-rich broken rock mass is a very common unfavorable geological condition. Water-rich broken rock mass has the characteristics of poor cementation, low strength, and uncoordinated force deformation, which often induce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B111/70
CPCC04B28/006C04B2111/70C04B2111/00724C04B18/12C04B18/141C04B18/08C04B24/16C04B22/16C04B24/383C04B22/062C04B22/147C04B22/10Y02P40/10
Inventor 贾翰卿王少众王丽娟武超超李婷婷解鹏刘超
Owner 河北绿园检测认证集团有限公司
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