Composite cement admixture

A technology of compound cement and admixture, applied in the field of compound cement admixture, can solve the problems of unstable performance of grinding aid, decrease of cement contribution rate, influence of cement performance, etc. than the effect of science

Active Publication Date: 2020-09-11
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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  • 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, and belongs to the technical field of cement process admixtures. The grinding aid is prepared from the following raw materials in parts by weight:20-30 parts of a compound alcohol amine component, 10-15 parts of isooctyl alcohol phosphate, 4-8 parts of molasses, 4-8 parts of an emulsifying dispersant, 5-10 parts of triethylene glycol, 3-5 parts of an accelerant and 50-70 parts of water. The isooctanol phosphate and the composite alkylol amine component are in synergistic interaction, so that the grinding aid is small in mixing amount and good in grinding aid effect, and the 3d and 28d compressive and flexural strength of cement can be remarkably improved under the mixing amount of 0.01%; in addition, the raw materials are easy to obtain, and the preparation method is simple and suitable for popularization and application.

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 Applications(China)
IPC IPC(8): C04B24/38C04B24/12C04B24/00C04B103/52
CPCC04B40/0039C04B24/122C04B24/38C04B24/003C04B2103/52C04B24/005C04B22/002C04B22/062C04B24/10C04B24/32C04B24/023C04B24/124
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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