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Cement grinding aid and preparation method thereof

A technology of cement grinding aid and defoaming agent, applied in the field of cement grinding aid and its preparation, can solve the problems of unstable performance of grinding aid, decrease of cement contribution rate, high price and cost, and achieve good grinding aid effect and prevent The effect of agglomeration and improving grinding efficiency

Active Publication Date: 2019-05-14
RIZHAO FEM NEW MATERIAL TECH
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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

Method used

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  • Cement grinding aid and preparation method thereof
  • Cement grinding aid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A cement grinding aid, which is prepared from the following raw materials in parts by weight: 10 parts of modified alcohol amine type grinding aid component, 5 parts of isooctyl phosphate, 0.5 part of thickening dispersant, and 0.5 part of surfactant , 0.1 part of defoamer, 10 parts of water; the modified alcohol amine type grinding aid component is prepared by the following steps:

[0029] (1) Add maleic anhydride and diethanolamine into a three-necked flask protected by nitrogen gas, stir and heat to 70°C, and keep a constant temperature to test the pH value of the system. When the pH value is 6-7, stop heating and lower the temperature. After reaching room temperature, obtain mother liquor;

[0030] (2) Mix initiator, chain transfer agent and deionized water according to the mass ratio of 1:2:3 to obtain liquid A;

[0031] (3) Mix acrylic acid, mother liquor obtained in step (1) and deionized water according to a mass ratio of 1:2:5 to obtain liquid B;

[0032] (4)...

Embodiment 2

[0046] A cement grinding aid, which is prepared from the following raw materials in parts by weight: 20 parts of modified alcohol amine type grinding aid components, 7 parts of isooctanyl phosphate, 0.8 parts of thickening and dispersing agent, and 0.8 parts of surfactant , 0.3 parts of defoamer, 13 parts of water; the modified alcohol amine type grinding aid component is prepared by the following steps:

[0047] (1) Add maleic anhydride and diethanolamine into a three-necked flask protected by nitrogen gas, stir and heat to 70°C, and keep a constant temperature to test the pH value of the system. When the pH value is 6-7, stop heating and lower the temperature. After reaching room temperature, obtain mother liquor;

[0048] (2) Mix initiator, chain transfer agent and deionized water according to the mass ratio of 1:2:3 to obtain liquid A;

[0049] (3) Mix acrylic acid, mother liquor obtained in step (1) and deionized water according to a mass ratio of 1:2:5 to obtain liquid ...

Embodiment 3

[0059] A cement grinding aid, which is prepared from the following raw materials in parts by weight: 30 parts of modified alcohol amine type grinding aid components, 8 parts of isooctanyl phosphate, 1 part of thickening and dispersing agent, and 1 part of surfactant , 0.5 parts of defoamer, 15 parts of water; the modified alcohol amine type grinding aid component is prepared by the following steps:

[0060] (1) Add maleic anhydride and diethanolamine into a three-necked flask protected by nitrogen gas, stir and heat to 70°C, and keep a constant temperature to test the pH value of the system. When the pH value is 6-7, stop heating and lower the temperature. After reaching room temperature, obtain mother liquor;

[0061] (2) Mix initiator, chain transfer agent and deionized water according to the mass ratio of 1:2:3 to obtain liquid A;

[0062] (3) Mix acrylic acid, mother liquor obtained in step (1) and deionized water according to a mass ratio of 1:2:5 to obtain liquid B;

...

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Abstract

The invention discloses a cement grinding aid and a preparation method thereof, and belongs to the technical field of building materials. The grinding aid is prepared from a modified alcohol amine type grinding aid component, isooctanol phosphate, a thickening dispersant, a surfactant, a defoaming agent and water. According to the invention, maleic anhydride and diethanolamine are polymerized, andthen are fully modified by isopentenyl alcohol polyoxyethylene ether and acrylic acid under the condition of an aqueous solution to obtain the modified alcohol amine type grinding aid component. Themolecules of the alcohol amine type grinding aid component modified under assistance of the isooctanol phosphate in a grinding aid formula are spread to the surfaces of more high-energy particles, theisooctanol phosphate and the modified alcohol amine type grinding aid component act cooperatively, crack closure of materials is stopped, the crack propagation is accelerated, a synergistic effect isachieved, and a grinding aid effect is achieved jointly. The grinding aid formula is simple, raw materials are easily obtained, and the cement grinding aid is small in mixing amount and remarkable ineffect, and is suitable for being popularized and used.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a cement grinding aid and a preparation method thereof. Background technique [0002] 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, thereby improving the strength and quality of cement. Therefore, cement grinding aids have the advantages of saving energy, reducing consumption, reducing costs, and protecting resources, making them widely used. [0003] At present, most ceme...

Claims

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Application Information

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IPC IPC(8): C04B24/42C04B103/52
Inventor 肖维录陈维英
Owner RIZHAO FEM NEW MATERIAL TECH
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