Chlorine-free powdery cement grinding aid and preparation method thereof

A technology of cement grinding aid and fly ash, which is applied in the direction of cement production, etc. It can solve the problems of affecting the service life and durability of concrete, hindering the development, popularization and application, and corrosion of concrete steel bars, so as to reduce the water required for standard consistency, The effect of reducing the power consumption of grinding and reducing the cost of cement

Inactive Publication Date: 2010-03-10
NANJING ZHUJI ENERGY SAVING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, the powder cement grinding aids currently commonly used in China have a better effect on strengthening cement, but most of them are used in a relatively high amount, generally 0.8-1%, and often contain relatively high chloride salts, which are of great importance for improving cement. Early strength and increasing the amount of mixed materials are helpful, but it is easy to cause corrosion of steel bars in concrete, affecting the service life and durability of concrete, thus hindering its further development, promotion and application

Method used

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  • Chlorine-free powdery cement grinding aid and preparation method thereof
  • Chlorine-free powdery cement grinding aid and preparation method thereof
  • Chlorine-free powdery cement grinding aid and preparation method thereof

Examples

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Effect test

Embodiment 1

[0031] A chlorine-free powder cement grinding aid suitable for fly ash, including:

[0032] 3 parts of glycerol, 2 parts of dipropylene glycol, 45 parts of anhydrous sodium sulfate, 15 parts of sodium acetate, 1 part of sodium lignosulfonate, 3 parts of molasses, 1 part of corn syrup, 15 parts of calcined gypsum (particle size ≤ 2mm), 10 parts of urea, 15 parts of stone powder.

[0033] Preparation Process:

[0034] Weigh 3 parts of glycerol, 2 parts of dipropylene glycol, 3 parts of molasses, and 1 part of corn syrup in order to stir in the reaction kettle. When the temperature rises to 75°C, keep stirring for 30 minutes to prepare a uniform mixed solution for later use.

[0035] Then weigh 45 parts of anhydrous sodium sulfate, 15 parts of sodium acetate, 1 part of sodium lignosulfonate, 15 parts of calcined gypsum, 10 parts of urea, and 15 parts of stone powder and put them into the mixer in order to stir, and at the same time, spray the mixed solution prepared above evenly...

Embodiment 2

[0040] A chlorine-free powder cement grinding aid suitable for fly ash, including:

[0041] 1 part of triethanolamine, 1 part of triisopropanolamine, 3 parts of glycerin, 35 parts of anhydrous sodium sulfate, 15 parts of aluminum sulfate, 10 parts of sodium acetate, 0.5 parts of sodium gluconate, 4.5 parts of molasses, 15 parts of calcined gypsum (Particle size ≤ 2mm), stone powder 15 parts.

[0042] Preparation Process:

[0043] Weigh 1 part of triethanolamine, 1 part of triisopropanolamine, 3 parts of glycerol, 0.5 parts of sodium gluconate, and 4.5 parts of molasses, put them into the reaction kettle and stir in turn, and keep stirring for 60 minutes when the temperature rises to 80°C. Make a uniform mixed solution for later use.

[0044]Then take 35 parts of anhydrous sodium sulfate, 15 parts of aluminum sulfate, 10 parts of sodium acetate, 15 parts of calcined gypsum, and 15 parts of stone powder, and put them into the mixer in turn to stir, and at the same time, spray ...

Embodiment 3

[0049] A chlorine-free powder cement grinding aid suitable for fly ash, including:

[0050] 1.5 parts of N-methyldiethanolamine, 2 parts of glycerol, 1.5 parts of dipropylene glycol, 30 parts of anhydrous sodium sulfate, 10 parts of aluminum sulfate, 15 parts of sodium acetate, 5 parts of calcium acetate, 2.5 parts of sodium lignosulfonate 2.5 parts of molasses, 20 parts of calcined gypsum (particle size ≤ 2mm), 5 parts of urea, and 5 parts of stone powder.

[0051] Preparation Process:

[0052] Weigh 1.5 parts of N-methyldiethanolamine, 2 parts of glycerol, and 2.5 parts of molasses, and put them into the reaction kettle in order to stir. When the temperature rises to 80°C, keep stirring for 60 minutes to prepare a uniform mixed solution for later use.

[0053] Then weigh 30 parts of anhydrous sodium sulfate, 10 parts of aluminum sulfate, 15 parts of sodium acetate, 5 parts of calcium acetate, 2.5 parts of sodium lignosulfonate, 20 parts of calcined gypsum, 5 parts of urea, ...

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Abstract

The invention discloses a chlorine-free powdery cement grinding aid suitable for fly ash, which comprises the following components in parts by weight: 0-5 parts of alkanolamine, 2-5 parts of polylol,15-75 parts of sulfate, 5-20 parts of acetate, 0-5 parts of lignosulphonate, 2-6 parts of carbohydrate organic matter, 5-25 parts of miltonite, 0-25 parts of carbamide and 5-50 parts of inorganic carrier material. The invention also discloses a preparation method of the chlorine-free powdery cement grinding aid suitable for the fly ash. A compound grinding aid can lower the cement cost and uses the fly ash for replacing partial clinker to save the clinker dosage by 10-15 percent on the premise of keeping the cement strength unchanged, and uses extra 10-15 parts of fly ash without increasing the required water amount of cement standard consistency; the cost of the cement per ton is lowered by more than 10 Yuan.

Description

technical field [0001] The invention belongs to a compound grinding aid used in the technical field of cement grinding and a preparation method thereof, and particularly relates to reducing power consumption of cement grinding and reducing cement grinding in the production of cement grinding with fly ash as the main mixed material. A chlorine-free powder cement grinding aid for standard consistency water requirement, improving cement early and later strength and a preparation method thereof. Background technique [0002] In cement production, in order to increase grinding efficiency, reduce mill power consumption, and improve cement quality, a small amount of grinding aid is often added during the grinding process. Cement grinding aids are beneficial to reduce the surface energy of the material during the grinding process, eliminate the static electricity between the fine powder particles of the material, and improve the fluidity of the material in the mill, thereby increasi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/18C04B103/52
CPCC04B24/18C04B2103/52Y02P40/10
Inventor 李伟峰
Owner NANJING ZHUJI ENERGY SAVING TECH
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