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Mineralized material used in cement grinding process

A technology of cement powder and fly ash, which is applied in the field of cement grinding aids, can solve problems such as excessive chloride ions, inability to ensure the durability of concrete, the stability of concrete buildings, and corrosion of steel bars, so as to prolong life, eliminate bonding and adsorption Agglomeration, the effect of reducing power consumption

Pending Publication Date: 2021-09-21
山西天润恒德新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a mineralized material used in the cement grinding process, aiming to solve the problem of excessive chloride ion in cement powder grinding aids in the prior art, corrosion of steel bars, failure to ensure the durability of concrete and the stability of concrete buildings sexual problems

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  • Mineralized material used in cement grinding process

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Embodiment approach

[0024] As an embodiment of the present invention, the mineralization material further includes sulfite, and the sulfite is selected from one or more of sodium sulfite, potassium sulfite, and ammonium sulfite. Sodium sulfate, sodium thiosulfate, sodium sulfite, and fly ash are powders in the mineralized material, maleic anhydride dimer acid triethanolamine ester and ethylene glycol are liquid, and maleic anhydride dimer acid triethanolamine ester is market to buy. Considering the comprehensive performance and cost of the mineralized material, the sulfite is sodium sulfite, the sulfate is sodium sulfate, the thiosulfate is sodium thiosulfate, and the polyol is a molecule containing two Alcohols with one or two or more hydroxyl groups are generally soluble in water, have strong solubility in polar substances, are low in volatility, and are viscous liquids or crystalline solids whose viscosity and boiling point increase with the increase in molecular weight. In one embodiment of ...

Embodiment 1

[0042] In the present embodiment, adopt the following preparation method to obtain a kind of mineralized material used in the cement grinding process, and its preparation method comprises the following steps: (1) prepare raw material sodium sulfate, sodium thiosulfate, sodium sulfite, maleic anhydride Dimer acid triethanolamine ester, ethylene glycol, fly ash; (2) The liquid raw materials in step (1) are sprayed on the mixer with a liquid metering pump for metering, and the powder raw materials are matched by the automatic feeding system according to the proportion Feeding, the feeding process is prepared according to the following mass percentages, sodium sulfate 2%, sodium thiosulfate 7%, sodium sulfite 1%, maleic anhydride dimer acid triethanolamine ester 3%, ethylene glycol 2%, pulverized coal Ash 85%, transported to the mixer and fully mixed with liquid raw materials to obtain cement mineralized material products, the admixture in the cement grinding process is 0.5% of the...

Embodiment 2

[0044] In the present embodiment, adopt the following preparation method to obtain a kind of mineralized material used in the cement grinding process, and its preparation method comprises the following steps: (1) prepare raw material sodium sulfate, sodium thiosulfate, sodium sulfite, maleic anhydride Dimer acid triethanolamine ester, ethylene glycol, fly ash; (2) The liquid raw materials in step (1) are sprayed on the mixer with a liquid metering pump for metering, and the powder raw materials are matched by the automatic feeding system according to the proportion Feeding, the feeding process is prepared according to the following mass percentages, sodium sulfate 3%, sodium thiosulfate 7%, sodium sulfite 2%, maleic anhydride dimer acid triethanolamine ester 2%, ethylene glycol 2%, pulverized coal Ash 84%, transported to the mixer and fully mixed with liquid raw materials to obtain cement mineralized material products, the amount of admixture in the cement grinding process is 0...

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Abstract

The invention is suitable for the technical field of cement grinding aids, and provides a mineralized material used in a cement grinding process, the mineralized material is composed of the following substances by mass: 2-5% of sodium sulfate, 4-7% of sodium thiosulfate, 0-3% of sodium sulfite, 1-3% of maleic anhydride dimer acid triethanolamine ester, 1-3% of ethylene glycol, and 79-92% of fly ash. By determining proper substances and content, promoting early hydration of cement and greatly improving the early hydration rate of cement particles, the early strength is improved, the hydration durability is considered, the later hydration of the cement is promoted through sodium thiosulfate, maleic anhydride dimer acid triethanolamine ester and ethylene glycol, the strength of cement paste is improved, and the cement paste can also wrap the surface of cement particles to form a protective film to eliminate bonding and adsorption agglomeration, the maleic anhydride dimer acid triethanolamine ester can form an oxidation protection film on the metal surface to retard the corrosion of steel bars so that the machine-hour yield of a mill is increased, the comprehensive performance of the product is improved, the power consumption of cement grinding is reduced, and the damage to the cement concrete caused by excessive chloride ions is avoided.

Description

technical field [0001] The invention belongs to the technical field of cement grinding aids, in particular to a mineralized material used in the cement grinding process. Background technique [0002] At present, the powder grinding aid used in the cement grinding process has the phenomenon of simply adding a large amount of inorganic salts and adding NaCl without restriction, resulting in excessive chloride ions in the cement, corroding the steel bars in the concrete building, and seriously affecting the strength of the concrete. Durability, causing safety hazards to buildings and reducing service life. Cement powder grinding aids with excessive chloride ions do not have the outstanding effect of increasing the output of cement mills and cement performance during the cement grinding process. Its improvement in the early strength of cement is limited, and the 3-day compressive strength does not increase by more than 2 MPa. And cause cement strength to decline in the later st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/52
CPCC04B7/52
Inventor 郭建华李阮
Owner 山西天润恒德新材料有限公司
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