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Chlorine-free high efficiency cement grinding aid and preparation method

A cement grinding aid and the technology of grinding aid, which are applied in the field of cement production and processing, can solve the problems of narrow adaptability, high production cost, unfavorable cement performance, etc., and can solve the problems of large fluctuation, stable application performance and good grinding aid effect. Effect

Inactive Publication Date: 2012-11-28
LIAOCHENG TIANCHENG CEMENT TECH RES DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned problems that the grinding aid contains substances that are unfavorable to cement performance, high production cost and narrow adaptability, the present invention provides a chlorine-free high-efficiency cement grinding aid, the main raw materials of which are molasses, wood calcium, wheatgrass alkali Lignin, sodium hydroxymethylglycinate, AMPS copolymer, silicone oil, sodium sulfate and water glass have effectively reduced the production cost of grinding aids, adjusted the components of grinding aids, and greatly improved the performance of grinding aids. performance and scope of application

Method used

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  • Chlorine-free high efficiency cement grinding aid and preparation method
  • Chlorine-free high efficiency cement grinding aid and preparation method
  • Chlorine-free high efficiency cement grinding aid and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The ingredients of the grinding aid are 10% of molasses, 5% of wood calcium, 8% of sodium sodium hydroxymethylglycinate, 15% of AMPS copolymer, 5% of water glass, 8% of wheatgrass lignin and the balance of water.

[0020] This example is applied to 32.5P·S·A slag portland cement, the proportion of cement is: clinker 55%, granulated blast furnace slag 35%, gypsum 10%. According to the ratio of 0.08% of the cement mass, the grinding aid of the present invention is added, and the grinding time of the blank sample and the test sample is both 29 minutes.

[0021] The specific experimental results are shown in the table below:

[0022]

[0023] Experimental data show that the product of the present invention has a good grinding aid effect on 32.5P·S·A slag portland cement. Compared with the blank cement, the cement mixed with 0.08% of the grinding aid of the invention has a 22.8% reduction in sieve residue at 45 μm, a 39.4% reduction in sieve residue at 80 μm, a 17.2% inc...

Embodiment 2

[0025] The ingredients of the grinding aid are 15% molasses, 8% wood calcium, 5% sodium hydroxymethylglycinate, 10% AMPS copolymer, 5% water glass, 1% silicone oil, 5% wheatgrass lignin and Balance water.

[0026] Apply this example to 42.5P·O ordinary Portland cement. The cement proportion is: 80% clinker, 5% granulated blast furnace slag, 5% fly ash, 5% gypsum, and 5% limestone. The grinding aid of the present invention is added in a proportion of 0.1% of the cement mass, and the grinding time of the blank sample and the test sample is both 30 minutes.

[0027] The specific experimental results are shown in the table below:

[0028]

[0029] Experimental data show that the product of the present invention has a good grinding aid effect on 42.5P·O ordinary Portland cement. Compared with the blank cement, the cement mixed with 0.1% of the grinding aid of the invention has a 21.6% reduction in sieve residue at 45 μm, a 27.8% reduction in sieve residue at 80 μm, a 15.1% inc...

Embodiment 3

[0031] The ingredients of the grinding aid are 20% molasses, 5% wood calcium, 5% sodium hydroxymethylglycinate, 7% AMPS copolymer, 8% water glass, 1.2% silicone oil, 3% wheatgrass lignin and Balance water.

[0032] This example is applied to 32.5P·S·B slag portland cement, the proportion of cement is: clinker 35%, granulated blast furnace slag 55%, gypsum 10%. The grinding aid of the present invention is added in a proportion of 0.08% of the cement mass, and the grinding time of the blank sample and the test sample is both 29 minutes.

[0033] The specific experimental results are shown in the table below:

[0034]

[0035] Experimental data show that the product of the present invention has a good grinding aid effect on 32.5P·S·B slag portland cement. Compared with the blank cement, the cement mixed with 0.08% of the grinding aid of the invention has a 21.4% reduction in sieve residue at 45 μm, a reduction of 37.1% at 80 μm sieve residue, a 15.1% increase in specific sur...

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Abstract

The invention relates to a chlorine-free high efficiency cement grinding aid and a preparation method, the grinding aid comprises the following components by mass ratio: 10-20% of molasses, 3-15% of wheat straw soda lignin, 0-2% of silicone oil, 5-15% of sodium hydroxy methyl glycinate, 7-15% of AMPS copolymer, 5-8% of soluble glass, 5-8% of ligneous calcium sulphonate, 5-10% of anhydrous sodium sulphate and the balance of water. The method comprises the following steps: adding wheat straw soda lignin, ligneous calcium sulphonate, anhydrous sodium sulphate and molasses according to the above mass ratio in water at the temperature of 35-60 DEG C, uniformly stirring; then adding sodium hydroxy methyl glycinate, the AMPS copolymer, soluble glass and silicone oil, and uniformly stirring to obtain the dark brown liquid grinding aid product. The grinding aid has good grinding effect, no chlorine salt substances which can influence the endurance of the concrete is contained, the application scope of the grinding aid is enlarged, the cost is reduced, and the volatility of the usage effect can be effectively used.

Description

technical field [0001] The invention belongs to the technical field of cement production and processing, and relates to an external grinding aid for cement production, in particular to a chlorine-free high-efficiency cement grinding aid and a preparation method thereof. technical background [0002] my country is a big cement producing country, and its cement output ranks first in the world for many years. However, the key problem restricting the development of my country's cement industry is the high energy consumption and low utilization rate in the cement grinding stage. The cement industry is an industry with high energy consumption and high pollution, and a key industry for energy conservation and emission reduction. To solve such problems, in addition to improving equipment and technical processes, it is an effective way to add a small amount of cement grinding aids in the grinding process. [0003] It has been proved by practice that in actual cement production, the...

Claims

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Application Information

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IPC IPC(8): C04B24/18C04B24/16C04B103/52
Inventor 张学成陶绪泉丁俊红李相成
Owner LIAOCHENG TIANCHENG CEMENT TECH RES DEV
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