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Chloride-free cement grinding aid

A technology of cement grinding aids and alcohol amines, applied in the field of cement additives, can solve the problems of insignificant strengthening effect, high cost of grinding aids, and affecting the service life of buildings, so as to reduce energy consumption and achieve good grinding aid effect , the effect of increasing strength

Inactive Publication Date: 2017-03-22
张松波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing liquid cement grinding aids still have the following deficiencies: a large amount of triethanolamine is used in the grinding aid products, resulting in high cost of the grinding aid; the effect of strengthening the cement with a large amount of limestone is not obvious; Harmful ingredients such as chloride ions

Method used

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  • Chloride-free cement grinding aid

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Chlorine-free cement grinding aid, made of the following raw materials in parts by weight: 28 parts of triethanolamine, 22 parts of alkylphenol polyoxyethylene ether, 10 parts of hexamethylenetetramine, 11 parts of N-acetylimidazole, polyethylene 1 part of diol, 7 parts of molasses.

[0028] The preparation method of above-mentioned chlorine-free cement grinding aid is:

[0029] 1) take each component by weighing;

[0030] 2) adding triethanolamine, alkylphenol polyoxyethylene ether and hexamethylenetetramine to the reactor in sequence;

[0031] 3) Keep the reaction kettle at 70°C and stir for 250 minutes;

[0032] 4) Lower the temperature to 60°C, continue to add N-acetylimidazole, polyethylene glycol and molasses in sequence, and stir for 180 minutes;

[0033] 5) Cool down to room temperature, pack, and get ready.

Embodiment 2

[0035] Chlorine-free cement grinding aid, made of the following raw materials in parts by weight: 31 parts of diisopropylethanolamine, 20 parts of alkylphenol polyoxyethylene ether, 11 parts of hexamethylenetetramine, and 10 parts of N-acetylimidazole , 2 parts of polyethylene glycol, 6 parts of molasses.

[0036] The preparation method of above-mentioned chlorine-free cement grinding aid is:

[0037] 1) take each component by weighing;

[0038] 2) adding diisopropylethanolamine, alkylphenol polyoxyethylene ether and hexamethylenetetramine to the reactor in sequence;

[0039] 3) Keep the reaction kettle at 71°C and stir for 230 minutes;

[0040] 4) Lower the temperature to 61°C, continue to add N-acetylimidazole, polyethylene glycol and molasses in sequence, and stir for 170 minutes;

[0041] 5) Cool down to room temperature, pack, and get ready.

Embodiment 3

[0043] Chlorine-free cement grinding aid, made of the following raw materials in parts by weight: 34 parts of triisopropanolamine, 18 parts of alkylphenol polyoxyethylene ether, 12 parts of hexamethylenetetramine, and 9 parts of N-acetylimidazole , 3 parts of polyethylene glycol, 5 parts of molasses.

[0044] The preparation method of above-mentioned chlorine-free cement grinding aid is:

[0045] 1) take each component by weighing;

[0046] 2) adding triisopropanolamine, alkylphenol polyoxyethylene ether and hexamethylenetetramine to the reactor in sequence;

[0047] 3) Keep the reaction kettle at 72°C and stir for 210min;

[0048] 4) Lower the temperature to 62°C, continue to add N-acetylimidazole, polyethylene glycol and molasses in sequence, and stir for 150 minutes;

[0049] 5) Cool down to room temperature, pack, and get ready.

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Abstract

The invention belongs to the technical field of concrete additives, and particularly relates to a chloride-free cement grinding aid. The chloride-free cement grinding aid is prepared from raw materials in parts by weight as follows: 28-46 parts of alcohol amine compounds, 10-22 parts of alkylphenol ethoxylates, 10-16 parts of hexamethylene tetramine, 5-11 parts of N-acetylimidazole, 1-7 parts of polyethylene glycol and 1-7 parts of molasses. The chloride-free cement grinding aid does not contain chloride ion composition, is non-toxic, green, environment-friendly and non-corrosive, has no damage to a human body, a building and the like and has a good grinding-aid effect, output per machine-hour is increased, and energy consumption can be reduced.

Description

technical field [0001] The invention belongs to the technical field of cement additives, in particular to a chlorine-free cement grinding aid. Background technique [0002] Cement grinding is an important process in cement production. It grinds materials such as cement clinker, retarder and performance adjustment materials to a suitable particle size by mechanical means, so as to meet the coagulation and hardening requirements of cement paste. In the grinding process, the material particles are gradually refined through the grinding equipment, the specific surface area increases, and the surface is charged due to the breakage of chemical bonds, and the particles will adsorb each other to form agglomerates or stick to the grinding body and the liner. The grinding efficiency is reduced and the energy consumption is increased. Cement grinding aid is an indispensable auxiliary material in the cement industry today. Adding a small amount of cement grinding aid to cement can impr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/32C04B103/52
CPCC04B40/0039C04B2103/52C04B24/10C04B24/121C04B24/122C04B24/128C04B24/32
Inventor 张松波
Owner 张松波
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