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Cement grinding aid

A technology of cement grinding aids and substances, applied in the field of cement grinding aids, can solve the problems of low compressive strength, unstable effect, and quality fluctuation of cement, and achieve the goal of improving cement strength, increasing compactness, and reducing surface energy Effect

Pending Publication Date: 2020-06-02
青岛少氏基业贸易有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Alcoholamines (triethanolamine accounts for about 70% of the total) as the main raw material of commonly used cement grinding aids have unstable effects and are sensitive to the dosage. Small fluctuations in the dosage will cause major fluctuations in quality, and have a negative effect on cement. The role of compressive strength in the later stage is small, and the single-component grinding aid only contains one or two active groups, which has a single function and cannot meet the requirements of various types of cement mixtures in my country.

Method used

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  • Cement grinding aid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A cement grinding aid is composed of the following parts by weight: 40% carboxylic acid polymer, 6% polyol, 2% complexing enhancing substance, 5% glycidyl trimethylammonium chloride, 1% calcium formate, Sodium p-benzylaminobenzenesulfonate 2%, the balance is water.

[0020] The carboxylic acid polymer is polymerized from diethylene glycol monoacrylate, dimethylaminoethyl methacrylate, sodium p-styrenesulfonate and itaconic acid.

[0021] The polyol is octyldodecanol.

[0022] The complexation enhancing substance is 2-hydroxyphosphonoacetic acid.

Embodiment 2

[0024] A cement grinding aid is composed of the following parts by weight: 60% carboxylic acid polymer, 3% polyol, 5% complexing enhancing substance, 2% glycidyl trimethyl ammonium chloride, 3% calcium formate, Sodium p-benzylaminobenzenesulfonate 5%, the balance is water.

[0025] Described carboxylic acid polymer preparation method comprises the following steps:

[0026] (1) 160 parts by weight of diethylene glycol monoacrylate, 314 parts by weight of dimethylaminoethyl methacrylate and 130 parts by weight of itaconic acid were added with water to form an aqueous monomer solution with a mass fraction of 50%;

[0027] (2) adding water to the ammonium persulfate of 6 parts by weight is made into a mass fraction of 9% initiator aqueous solution;

[0028] (3) Add 206 parts by weight of sodium p-styrene sulfonate, 412 parts by weight of water and 6 parts by weight of chain transfer agent in a four-necked flask equipped with a stirrer and a reflux condenser, and heat up to 90°C. ...

Embodiment 3

[0031] A cement grinding aid is composed of the following parts by weight: 50% carboxylic acid polymer, 4% polyol, 4% complexing enhancing substance, 3% glycidyl trimethyl ammonium chloride, 2% calcium formate, Sodium p-benzylaminobenzenesulfonate 4%, the balance is water.

[0032] Described carboxylic acid polymer preparation method comprises the following steps:

[0033] (1) Add water to 320 parts by weight of diethylene glycol monoacrylate, 157 parts by weight of dimethylaminoethyl methacrylate and 260 parts by weight of itaconic acid to form an aqueous monomer solution with a mass fraction of 30%;

[0034] (2) adding water to 20 parts by weight of ammonium persulfate is made into a 3% initiator aqueous solution with a mass fraction;

[0035] (3) Add 412 parts by weight of sodium p-styrene sulfonate, 206 parts by weight of water and 15 parts by weight of chain transfer agent in a four-necked flask equipped with a stirrer and a reflux condenser, and heat up to 70°C. The mo...

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Abstract

The invention discloses a cement grinding aid, and belongs to the technical field of cement process additives. The grinding aid is prepared from, by weight, 40-60% of carboxylic acid polymer, 3-6% ofpolyhydric alcohol, 2-5% of a complexing enhancing substance, 2-5% of glycidyltrimethylammonium chloride, 1-3% of calcium formate, 2-5% of sodium p-benzylaminobenzenesulfonate, and the balance of water. The product is good in grinding assisting effect, capable of remarkably improving the grinding efficiency of cement, wide in application range, good in adaptability to cement taking fly ash, mineral slag, coal gangue, furnace slag and the like as mixed materials, and suitable for various Portland cement, fly ash cement, mineral slag cement and pozzolanic cement.

Description

technical field [0001] The invention belongs to the technical field of admixtures for cement production, and in particular relates to a cement grinding aid. Background technique [0002] Cement grinding aid is an admixture added during cement grinding to aid in grinding without harming human health and the performance of cement concrete. It can significantly improve the grindability of materials, reduce the agglomeration of particles, and The fluidity of the material in the mill improves the grinding efficiency of the cement mill and reduces energy consumption. At the same time, it can also reduce the amount of clinker and increase the amount of industrial waste, thereby reducing the environmental pollution caused by clinker production and industrial waste stacking. [0003] Alcoholamines (triethanolamine accounts for about 70% of the total) as the main raw material of commonly used cement grinding aids have unstable effects and are sensitive to the dosage. Small fluctuatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/20C04B24/16C08F220/34C08F222/02C08F222/14C08F212/14C04B103/52
CPCC04B24/161C04B40/0039C04B2103/52C08F212/14C08F220/34C08F222/10C04B24/026C04B24/12C04B24/04C04B24/20
Inventor 傅修丽
Owner 青岛少氏基业贸易有限公司
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