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Grouting material capable of improving water retention capacity of water glass composite colloid used in coal mine and preparation method of grouting material

A technology of grouting material and water glass, which is applied in the field of fire extinguishing materials, can solve problems such as poor water retention performance and cracking of consolidated bodies, and achieve the effects of improving water retention performance, prolonging the setting time, and solving the effects of easy cracking

Inactive Publication Date: 2015-09-30
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still a series of problems such as poor water retention performance and cracking of the consolidated body.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Dissolve 0.1 g of starch in 71 g of tap water at room temperature, and stir until the solution system is stable and the polymer particles do not agglomerate.

[0020] 2) Add 2g of sodium bicarbonate powder into the solution obtained in step 1), and stir until the sodium bicarbonate powder is completely dissolved, and there is no white granular powder in the solution. Then slowly add 10 g of bentonite to the solution, and stir until the bentonite particles are evenly dispersed.

[0021] 3) Take 17g of water glass solution and add it to the solution obtained in step 2), stir until the bentonite particles no longer settle, and then let stand until the system is completely consolidated.

[0022] The initial setting time of the obtained composite colloidal material is 5min30s, and the final setting time is 7min32s; after setting, the dehydration rate after standing at room temperature for 30 days is 75.76%, and the consolidated body has no cracking phenomenon.

Embodiment 2

[0024] 1) Dissolve 0.1 g of cellulose in 71 g of tap water at room temperature, and stir until the solution system is stable and the polymer particles do not agglomerate.

[0025] 2) Add 2g of sodium bicarbonate powder into the solution obtained in step 1), and stir until the sodium bicarbonate powder is completely dissolved, and there is no white granular powder in the solution. Then slowly add 10 g of bentonite to the solution, and stir until the bentonite particles are evenly dispersed.

[0026] 3) Take 17g of water glass solution and add it to the solution obtained in step 2), stir until the bentonite particles no longer settle, and then let stand until the system is completely consolidated.

[0027] The initial setting time of the obtained composite colloidal material is 7min50s, and the final setting time is 10min17s; after setting, the dehydration rate after standing at room temperature for 30 days is 74.57%, and the consolidated body has no cracking phenomenon.

Embodiment 3

[0029] 1) Dissolve 0.2g of cationic polyacrylamide in 71g of tap water at room temperature, and stir until the solution system is stable and the polymer particles do not agglomerate.

[0030] 2) Add 2g of sodium bicarbonate powder into the solution obtained in step 1), and stir until the sodium bicarbonate powder is completely dissolved, and there is no white granular powder in the solution. Then slowly add 10 g of bentonite to the solution, and stir until the bentonite particles are evenly dispersed.

[0031] 3) Take 17g of water glass solution and add it to the solution obtained in step 2), stir until the bentonite particles no longer settle, and then let stand until the system is completely consolidated.

[0032] The initial setting time of the obtained composite colloidal material is 6min48s, and the final setting time is 11min47s; after setting, the water loss rate is 77.14% after standing at room temperature for 30 days, and the consolidated body has no cracking phenomen...

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PUM

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Abstract

The invention discloses a grouting material capable of improving the water retention capacity of water glass composite colloid used in a coal mine and a preparation method of the grouting material and belongs to the technical field of fire-fighting materials. The grouting material is formed by uniformly mixing a polymer additive and a raw water glass composite colloidal material, wherein the polymer additive accounts for 0.1-1% of the weight percentage of the raw water glass composite colloidal material; the polymer additive comprises any one of starch, cellulose, anionic polyacrylamide and cationic polyacrylamide. According to the grouting material capable of improving the water retention capacity of water glass complex colloid used in the coal mine and the preparation method of the grouting material, provided by the invention, the water retention capacity is obviously improved if the grouting material is compared with the raw water glass composite colloidal material, and the finally obtained jet-grouted soilcrete does not crack; the sources of raw materials are extensive, the cost is low, the products have no toxic and side effect on human bodies, and cause no pollution to underground wells.

Description

technical field [0001] The invention relates to an improved grouting material with water-retaining performance of water-glass composite colloid for coal mines and a preparation method thereof, belonging to the technical field of fire-preventing materials. Background technique [0002] my country is a country with rich reserves of coal mine resources but also huge consumption. In recent years, many high-tech coal mining technologies have been applied to the coal mine industry. However, the frequency of coal mine disasters in my country is still higher than other countries in the world. Especially the coal mine fire problem not only caused a large amount of loss of coal resources, but also caused a serious threat to the personal safety of coal mine workers. Yellow mud grouting material is a relatively traditional material used for fire prevention and extinguishing in coal mines. However, its use is greatly restricted due to its defects such as low consolidation strength, poor ...

Claims

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Application Information

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IPC IPC(8): C04B28/26
Inventor 索红莉苏健张腾陈立佳樊彦艳王鼎元郭艾东
Owner BEIJING UNIV OF TECH
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