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A kind of composite cement admixture

A composite cement and admixture technology, which is applied in the field of composite cement admixtures, can solve the problems of unstable performance of grinding aids, reduction of cement contribution rate, impact on cement performance, etc., achieve good grinding aid effect, improve compatibility, and mix more effective than science

Active Publication Date: 2022-02-22
安徽海螺材料科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Triethanolamine can effectively improve the early strength of cement, but due to changing the hydration process of cement, the contribution rate to the later strength of cement has decreased
In addition, although the currently commercially available cement grinding aids have a certain grinding-aiding effect, they are all single chemical products or compounded from several simple chemical raw materials, which often have high prices and costs, and the source of each batch of monomer raw materials or Different batch numbers lead to problems such as unstable performance of grinding aids. At the same time, when the amount reaches a certain amount, it will have an adverse effect on some properties of cement.

Method used

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  • A kind of composite cement admixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A composite cement admixture is prepared from the following raw materials in parts by weight: 20 parts of composite alcohol amine components, 10 parts of isooctanyl phosphate, 4 parts of molasses, 4 parts of emulsifying dispersant, 5 parts of triethylene glycol, 3 parts of promotor and 50 parts of water; The complex alcohol amine component is prepared by the following steps:

[0023] 1) Sodium chloroacetate is completely dissolved in deionized water at 60°C, and kept at a constant temperature;

[0024] 2) Add aqueous sodium hydroxide solution to maintain the pH value of the solution system at 11-12, control the temperature of the solution system to 60°C, then add triethanolamine; the molar ratio of sodium chloroacetate, deionized water, sodium hydroxide and triethanolamine The ratio is 1:3:1:1; stir at 60°C for 1 hour to obtain complex alcohol amine components.

[0025] The concentration of the sodium hydroxide aqueous solution is 25%.

[0026] The adding method of tr...

Embodiment 2

[0035] A composite cement admixture is prepared from the following raw materials in parts by weight: 25 parts of composite alcohol amine components, 13 parts of isooctanyl phosphate, 6 parts of molasses, 6 parts of emulsifying dispersant, 8 parts of triethylene glycol, 4 parts of promotor and 60 parts of water; The complex alcohol amine component is prepared by the following steps:

[0036] 1) Sodium chloroacetate is completely dissolved in deionized water at 60°C, and kept at a constant temperature;

[0037] 2) Add aqueous sodium hydroxide solution to maintain the pH value of the solution system at 11-12, control the temperature of the solution system to 60°C, then add triethanolamine; the molar ratio of sodium chloroacetate, deionized water, sodium hydroxide and triethanolamine The ratio is 1:3:1:1; stir at 60°C for 1 hour to obtain complex alcohol amine components.

[0038] The concentration of the sodium hydroxide aqueous solution is 25%.

[0039] The adding method of tr...

Embodiment 3

[0048] A composite cement admixture is prepared from the following raw materials in parts by weight: 30 parts of composite alcohol amine components, 15 parts of isooctyl alcohol phosphate, 8 parts of molasses, 8 parts of emulsifying dispersant, 10 parts of triethylene glycol, 5 parts of promotor and 70 parts of water; The complex alcohol amine component is prepared by the following steps:

[0049]1) Sodium chloroacetate is completely dissolved in deionized water at 60°C, and kept at a constant temperature;

[0050] 2) Add aqueous sodium hydroxide solution to maintain the pH value of the solution system at 11-12, control the temperature of the solution system to 60°C, then add triethanolamine; the molar ratio of sodium chloroacetate, deionized water, sodium hydroxide and triethanolamine The ratio is 1:3:1:1; stir at 60°C for 1 hour to obtain complex alcohol amine components.

[0051] The concentration of the sodium hydroxide aqueous solution is 25%.

[0052] The adding method...

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Abstract

The invention discloses a composite cement admixture, which belongs to the technical field of cement process admixtures. The grinding aid of the present invention is composed of 20-30 parts of composite alcohol amine components, 10-15 parts of isooctanyl phosphate, 4-8 parts of molasses, 4-8 parts of emulsifying dispersant, 5-10 parts of triethylene glycol, It is prepared from 3-5 parts of accelerator and 50-70 parts of water as raw materials. The synergistic effect of the isooctyl phosphate ester and the compound alcohol amine component of the present invention makes the grinding aid dosage small, and the grinding aid effect is good, and the 3d and 28d compressive and flexural strength of cement can be significantly improved at the dosage of 0.01%. , and the raw materials are easy to obtain, the preparation method is simple, and it is suitable for popularization and use.

Description

technical field [0001] The invention belongs to the technical field of cement process admixtures, in particular to a composite cement admixture. Background technique [0002] Cement production generally goes through three steps: raw meal preparation, clinker calcination and cement grinding. In view of the "agglomeration" phenomenon in grinding, cement grinding aids have become the mainstream of application in the cement industry. [0003] Cement grinding aids are added during the grinding of cement clinker. Adding an appropriate amount of grinding aid can achieve physical and chemical modification of the particle surface through the charge dispersion and surface activity of the grinding aid, and exert the interface effect, which can reduce energy consumption under the same cement fineness; or reduce energy consumption when the energy consumption is the same In the case of increasing the specific surface area of ​​cement, optimizing the gradation of cement particles, thereb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/38C04B24/12C04B24/00C04B103/52
CPCC04B40/0039C04B24/122C04B24/38C04B24/003C04B2103/52
Inventor 秦尤敏陈烽鲁江张辉司宏振吕晓冯恩娟李耀王志强武春江
Owner 安徽海螺材料科技股份有限公司
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