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Compound cement grinding aid and preparation method thereof

A technology of composite cement and grinding aid, which is applied in the field of environment-friendly complex, mud green, composite cement grinding aid, energy saving, and the preparation field of the composite cement grinding aid, achieves the advantages of convenient use, low production cost and excellent effect. Effect

Active Publication Date: 2014-03-19
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]In order to solve the above problems that the existing cement grinding aids affect the later strength of cement, high cost, poor stability, large fluctuations in use effect, and narrow application range, The invention provides a compound cement grinding aid which can improve the output of cement, reduce energy consumption and realize green, energy-saving and environment-friendly grinding of cement on the basis of small dosage and no influence on cement strength.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0028] (1) Weigh 30.021 g of succinic anhydride and 31.543 g of diethanolamine, first dissolve diethanolamine in an appropriate amount of DMAc, dissolve it and pour it into a three-necked flask with a magnetic stirrer, then dissolve succinic anhydride with an appropriate amount of DMAc; then Slowly add it dropwise into the three-necked flask containing diethanolamine, stir while adding dropwise, and finish adding dropwise in 1h-1.5h; react at room temperature for 3h-5h, and the reaction product is AB 2 type monomer. In the above system, first add 60 mL of toluene (toluene is a water-carrying agent), then add 14.920 g of triethanolamine as a nuclear molecule, and add 0.4 g of p-toluenesulfonic acid as a catalyst; then start heating until boiling, and there is reflux in the spherical condenser produce. After 7 h-8 h of heat preservation reaction, the solvent in the system was distilled off under reduced pressure to obtain a hyperbranched polyamide ester containing alcohol amine...

example 2

[0032] (1) Weigh 30.021 g of succinic anhydride and 31.543 g of diethanolamine, first dissolve diethanolamine in an appropriate amount of DMAc, dissolve it and pour it into a three-necked flask with a magnetic stirrer, then dissolve succinic anhydride with an appropriate amount of DMAc; then Slowly add it dropwise into the three-necked flask containing diethanolamine, stir while adding dropwise, and finish adding dropwise in 1h-1.5h; react at room temperature for 3h-5h, and the reaction product is AB 2 type monomer. In the above system, first add 60 mL of toluene (toluene is a water-carrying agent), then add 4.973 g of triethanolamine as a nuclear molecule, and add 0.4 g of p-toluenesulfonic acid as a catalyst; then start heating until boiling, and there is reflux in the spherical condenser produce. After 7 h-8 h of heat preservation reaction, the solvent in the system was distilled off under reduced pressure to obtain a hyperbranched polyamide ester containing alcohol amine ...

example 3

[0036] (1) Weigh 30.021 g of succinic anhydride and 31.543 g of diethanolamine, first dissolve diethanolamine in an appropriate amount of DMAc, dissolve it and pour it into a three-necked flask with a magnetic stirrer, then dissolve succinic anhydride with an appropriate amount of DMAc; then Slowly add it dropwise into the three-necked flask containing diethanolamine, stir while adding dropwise, and finish adding dropwise in 1h-1.5h; react at room temperature for 3h-5h, and the reaction product is AB 2 type monomer. Add 60 mL of toluene to the above system first (toluene is a water-carrying agent), then add 2.131 g of triethanolamine as a nuclear molecule, and add 0.4 g of p-toluenesulfonic acid as a catalyst; then start heating until boiling, and there is reflux in the spherical condenser produce. After 7 h-8 h of heat preservation reaction, the solvent in the system was distilled off under reduced pressure to obtain a hyperbranched polyamide ester containing alcohol amine g...

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PUM

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Abstract

The invention relates to the technical field of cement additives, and particularly relates to a compound cement grinding aid. The compound cement grinding aid comprises hyperbranched polyesteramide, hexadecanol, calcium lignosulphonate, urea, sodium acetate, glycol and glycerol. The compound cement grinding aid mixed in the cement accounts for 0.04%-0.05% the weight of the cement. The compound cement grinding aid, which takes the hyperbranched polyesteramide as the main component, can be used for obviously improving the content of fine particles in the cement, improving the grinding efficiency, lowering the production cost and hardly affecting the properties of the cement, is convenient to use, has a good effect, and has good development prospect in market.

Description

technical field [0001] The invention relates to the technical field of cement admixtures, in particular to a composite cement grinding aid, and also relates to a preparation method of the composite cement grinding aid. Background technique [0002] At present, my country's cement production is generally divided into three steps, preparing raw meal, calcining clinker, and grinding cement. Among them, more than 95% of the electric energy in the cement grinding process is wasted due to conversion into heat energy; at the same time, when the cement grinding becomes finer, it is easy to agglomerate and form agglomerates, which reduces the grinding efficiency. In order to improve the cement grinding efficiency, reduce the power consumption during the cement grinding process, increase the amount of admixture, and reduce the cost of cement, it is generally necessary to add cement grinding aids. [0003] Cement grinding aids can form a coating film on the surface of cement particl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/28C08G69/44C04B103/52
Inventor 寿崇琦温达
Owner UNIV OF JINAN
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