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A cement grinding aid that does not change the water requirement of cement standard thickness

A cement grinding aid and water demand technology, applied in the field of cement, can solve the problems of poor compatibility of admixtures, increased water demand for standard viscosity, and high cost, so as to improve compatibility, optimize cement particle gradation, reduce effect of rust

Active Publication Date: 2020-11-10
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

However, cement grinding aids still have many unsatisfactory defects such as increasing the water demand for standard consistency, making the compatibility of cement and concrete admixtures worse, high cost, excessive chloride ions and corrosion of steel bars by chloride ions.

Method used

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  • A cement grinding aid that does not change the water requirement of cement standard thickness
  • A cement grinding aid that does not change the water requirement of cement standard thickness

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Experimental program
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Embodiment approach

[0025] As an embodiment of the present invention, the thiosulfate is selected from one or more of sodium thiosulfate, potassium thiosulfate, ammonium thiosulfate and lithium thiosulfate.

[0026] In order to maintain the present invention, the addition of the cement grinding aid does not affect the water demand, and the thiosulfate in the present invention is ammonium thiosulfate.

[0027] Polyol

[0028] Polyols are alcohols with two or more hydroxyl groups in their molecules. Polyols are generally soluble in water. Most polyols are viscous liquids or crystalline solids with high boiling points, strong solubility for polar substances, and low toxicity and volatility. Its boiling point, viscosity, relative density and melting point increase with the increase of molecular weight.

[0029] As an embodiment of the present invention, the polyhydric alcohol is selected from alicyclic dihydric alcohol, ethylene glycol, diethylene glycol, dipropylene glycol, 1,4-butanediol, 1,6- ...

Embodiment approach 1

[0057] Embodiment 1. A cement grinding aid that does not change the water demand of cement standard viscosity, the preparation raw materials of the cement grinding aid at least include: thiosulfate, polyols, polyhydroxy monomers, carbonyl pyraldehyde derivatives , carboxyl complex alcohol amines, molasses and water.

[0058] Embodiment 2. A kind of cement grinding aid that does not change the cement standard thick water demand described in embodiment 1, described thiosulfate is selected from sodium thiosulfate, potassium thiosulfate, ammonium thiosulfate, thiosulfate One or more of lithium sulfate.

[0059] Embodiment 3. A kind of cement grinding aid described in embodiment 1 that does not change the cement standard thick water demand, the polyhydric alcohol is selected from the group consisting of cycloaliphatic dibasic alcohols, ethylene glycol, diethylene glycol, a One or more of dipropylene glycol, 1,4-butanediol, 1,6-hexanediol and glycerol.

[0060] Embodiment 4. A kin...

Embodiment 1

[0069] Embodiment 1: This embodiment provides a cement grinding aid that does not change the water requirement of cement standard viscosity. The raw materials for the preparation of the cement grinding aid include: 15 parts of thiosulfate, 20 parts of polyols, 8 parts of body, 12 parts of carbonylpyroaldehyde derivatives, 20 parts of carboxy complex alcohol amines, 15 parts of molasses and 30 parts of water.

[0070] The thiosulfate described in this embodiment is ammonium thiosulfate.

[0071] The polyol described in this embodiment is a mixture of ethylene glycol, glycerol and 1,4-cyclohexanediol in a weight ratio of 2:2:1.

[0072] The polyhydroxy monomer described in this embodiment is stachyose.

[0073] The preparation method of described carbonyl pyroaldehyde derivative is as follows:

[0074] Add water, sodium sulfite, acetone and benzylidene acetone in sequence to the reaction flask with reflux condenser, stir evenly, heat to 50-60°C and keep it warm for 1 hour; add...

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Abstract

The invention provides a cement grinding aid without changing standing thickening water demand of cement. The cement grinding aid at least comprises the following preparative raw materials: thiosulfate, polyhydric alcohols, polyhydroxy monomers, carbonyl coke aldehyde derivatives, composite carboxyl alcohol amine, molasses and water. According to the composite carboxyl alcohol amine and carbonyl coke aldehyde derivatives researched and developed in the invention, the molecular structure contains functional groups such as hydroxyl, carbonyl, methylene, sulfonate, double bonds, aromatic rings and the like. The cement grinding aid belongs to high molecular compounds, has excellent dispersion property, has the performance of an ordinary cement grinding aid, and overcomes the defects that the standing thickening water demand of cement is increased in the ordinary cement grinding aid, reinforcements are corroded by chloride ions, the production cost is high, and the like. The cost is reduced, corrosion on the reinforcements is reduced, and interaction with concrete admixtures is improved.

Description

technical field [0001] The invention relates to the field of cement, and more particularly relates to a cement grinding aid that does not change the water requirement of the standard consistency of the cement. Background technique [0002] Cement grinding aid is a chemical additive to improve the efficiency and performance of cement grinding. It can significantly improve the output of cement table and optimize the gradation of cement particles, reduce the fineness of cement, increase the specific surface area, stimulate the hydration power of cement, and improve the cement hydration power. Various technical indicators such as early and late strength. It can also greatly reduce the phenomenon of electrostatic adsorption, ball wrapping and sticky lining formed during the grinding process, and can reduce the tendency of re-agglomeration of ultrafine particles formed during the grinding process. So as to improve the fluidity of cement, improve the grinding effect, reduce the en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/16C04B103/52
CPCC04B40/0039C04B2103/52C04B22/14C04B24/02C04B24/023C04B24/026C04B24/10C04B24/122C04B24/001C04B24/16
Inventor 郭建华李乃元
Owner 山西天润恒德新材料有限公司
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