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Modified paste filler based on magnesium oxychloride gelling system and preparation method

A technology of magnesium oxychloride and filler, applied in the field of building materials, can solve the problems of strength shrinkage, poor performance, moisture absorption and halogen return, and achieve the effects of increasing stability, increasing pH value, and increasing reaction rate.

Active Publication Date: 2019-11-29
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defects existing in the existing system, the present invention proposes a modified paste filler based on the magnesium oxychloride gelling system, which solves the strength shrinkage, moisture absorption and halogen return in the prior art of the magnesium oxychloride gelling system and other bad performance issues

Method used

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  • Modified paste filler based on magnesium oxychloride gelling system and preparation method
  • Modified paste filler based on magnesium oxychloride gelling system and preparation method
  • Modified paste filler based on magnesium oxychloride gelling system and preparation method

Examples

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Effect test

Embodiment 1

[0042] A modified paste filler based on the magnesium oxychloride gelling system, consisting of the following components in weight percent:

[0043] 28% of brine, 30% of tailing salt, 32% of magnesium oxide, 3% of rice husk ash, 2% of kaolin-based gangue fluidized bed ash, 0.5% of SHMP complex catalyst, 2% of redispersible rubber powder, M-tuning Mixture 0.5%, whiskers 2%.

[0044] Its preparation method comprises the following steps:

[0045] S1. According to the formula of the above-mentioned modified paste filler based on the magnesium oxychloride gelling system, each component is weighed for subsequent use;

[0046] S2, magnesium oxide, whiskers, bittern (magnesium chloride concentration is 28.0%) is carried out uniform stirring 8min, obtains uniform slurry;

[0047] S30. Grinding the kaolin-based gangue fluidized-bed ash in a ball mill with a rotational speed of 220r / min for 45 minutes to obtain activated kaolin-based gangue fluidized-bed ash.

[0048] S3, uniformly mi...

Embodiment 2

[0056] A modified paste filler based on the magnesium oxychloride gelling system, consisting of the following components in weight percent:

[0057] 25% brine, 22% tail salt, 40% magnesium oxide, 1% rice husk ash, 1% kaolin-based gangue fluidized bed ash, 0.8% SHMP complex catalyst, 4% redispersible rubber powder, M-tuning Mixture 1.2%, whiskers 5%.

[0058] Its preparation method comprises the following steps:

[0059] S1. According to the formula of the above-mentioned modified paste filler based on the magnesium oxychloride gelling system, each component is weighed for subsequent use;

[0060] S2, magnesium oxide, whiskers, brine (magnesium chloride concentration is 32.0%) is carried out uniform stirring 10min, obtains uniform slurry;

[0061] S30. Grinding the kaolin-based gangue fluidized-bed ash in a ball mill with a rotational speed of 230r / min for 40 minutes to obtain activated kaolin-based gangue fluidized-bed ash.

[0062] S3, uniformly mixing rice husk ash, kaoli...

Embodiment 3

[0070] A modified paste filler based on the magnesium oxychloride gelling system, consisting of the following components in weight percent:

[0071] 30% brine, 20% tail salt, 35% magnesium oxide, 5% rice husk ash, 5% kaolin-based gangue fluidized bed ash, 1% SHMP complex catalyst, 1% redispersible rubber powder, M-tuning Mixture 2%, whiskers 1%.

[0072] Its preparation method comprises the following steps:

[0073] S1. According to the formula of the above-mentioned modified paste filler based on the magnesium oxychloride gelling system, each component is weighed for subsequent use;

[0074] S2, magnesium oxide, whiskers, brine (magnesium chloride concentration is 20%) is carried out uniform stirring 10min, obtains uniform slurry;

[0075] S30. Grinding the kaolin-based gangue fluidized-bed ash in a ball mill with a rotating speed of 240r / min for 40 minutes to obtain activated kaolin-based gangue fluidized-bed ash.

[0076] S3, uniformly mix rice husk ash, kaolinite gangue...

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Abstract

Belonging to the technical field of building materials, the invention relates to a modified paste filler based on a magnesium oxychloride gelling system. The modified paste filler comprises the following components: 25%-30% of brine, 20%-35% of tail salt, 25%-40% of magnesium oxide, 1%-5% of rice hull ash, 1%-5% of kaolin gangue fluidized bed ash residue, 0.5%-1% of an SHMP complex catalyst, 1%-4%of rubber powder, 0.5%-2% of an M-blender, and 1%-5% of whisker. The invention solves the problems of strength reduction, moisture absorption and damping and other poor properties in magnesium oxychloride gelling system in the prior art.

Description

technical field [0001] The invention relates to a modified paste filler based on a magnesium oxychloride gelling system, which belongs to the technical field of building materials. Background technique [0002] Due to the shortage of potassium salt mine resources, my country's dependence on foreign potash fertilizers remains at about 50%, and about 6 million to 7 million tons of potash fertilizers need to be imported every year. The mining of underground soluble solid potassium salt mines has largely alleviated the shortage of potassium salt mineral resources in my country and reduced my country's dependence on foreign potash fertilizers. However, for the goaf formed by underground mining, it is very easy to cause secondary geological disasters such as surface subsidence; in the production of potassium fertilizer, a large amount of sodium chloride tailing salt and magnesium chloride tailing liquid are produced, which will cause serious environmental pollution if they are dis...

Claims

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Application Information

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IPC IPC(8): C04B28/32C04B111/27
CPCC04B28/32C04B2111/27C04B2201/50C04B22/124C04B18/101C04B14/106C04B22/16C04B2103/0057C04B24/00C04B14/383
Inventor 曹明莉张洪磊曾德明
Owner DALIAN UNIV OF TECH
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