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Reinforced cement grinding aid and preparation method thereof

A cement grinding aid and enhanced technology, which is applied in the field of enhanced cement grinding aid and its preparation, can solve the problems of inconspicuous effect and high production cost, and achieve the effect of low price, low cost and sufficient source

Active Publication Date: 2013-09-04
JIANGSU JUWEI NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, most of the existing technologies and researches use traditional cement grinding aid components such as triethanolamine and urea as enhanced grinding aids for fly ash Portland cement. The effect is not obvious in practical application, and the production cost is high

Method used

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  • Reinforced cement grinding aid and preparation method thereof
  • Reinforced cement grinding aid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020]10 parts by weight of polystyrene foam plastics are pre-dissolved in 30 parts by weight of organic solvent hexane oxide, add the catalyst phosphorus pentoxide of 0.05 parts by weight, add the concentrated sulfuric acid of 20 parts by weight of 95% dropwise to the reactor, at 60 After reacting at ℃ for 4 hours, add 50 parts by weight of water, stir and separate the hexane oxide, then neutralize the remaining sulfuric acid with waste alumina, filter to remove impurities and unreacted waste alumina, and adjust with 20% NaOH solution Solution pH value is 7, obtains the mixed solution of SPS and aluminum sulfate;

[0021] Take 26 parts by weight of the above-mentioned mixed solution of SPS and aluminum sulfate, add 28.5 parts by weight of water, 20 parts by weight of diethanol monoisopropanolamine (DEIPA), 5 parts by weight of ethylene glycol, 10 parts by weight of diethylene glycol, molasses 10 parts by weight and 0.5 parts by weight of tributyl phosphate were mixed and stir...

Embodiment 2

[0024] Dissolve 10 parts by weight of polystyrene foam in advance in 100 parts by weight of organic solvent 1,2-dichloroethane, add 0.2 parts by weight of catalyst silver sulfate, and drop 25 parts by weight of 97% concentrated sulfuric acid into the reactor, After reacting at 40°C for 8 hours, add 65 parts by weight of water, stir and separate 1,2-dichloroethane, then use bauxite to neutralize the remaining sulfuric acid, filter to remove impurities and unreacted bauxite, and use 40% NaOH solution adjusts the pH value of the solution to 7 to obtain a mixed solution of SPS and aluminum sulfate;

[0025] Take 52.5 parts by weight of the above-mentioned mixed solution of SPS and aluminum sulfate, add 20.2 parts by weight of water, 3 parts by weight of N,N,N',N'-tetrakis(2-hydroxyethyl)ethylenediamine (THEEA), diethanol 7 parts by weight of monoisopropanolamine (DEIPA), 7 parts by weight of diethylene glycol, 5 parts by weight of corn syrup, 5 parts by weight of sucrose, and 0.3 ...

Embodiment 3

[0028] Take 45 parts by weight of the mixed solution of SPS and aluminum sulfate prepared in Example 2, add 30 parts by weight of water, N,N,N',N'-tetrakis(2-hydroxyethyl)ethylenediamine (THEEA) 5 Parts by weight, 2.5 parts by weight of methyldiethanolamine (MEDA), 5 parts by weight of propylene glycol, 5 parts by weight of diethylene glycol, 5 parts by weight of sucrose, 2.3 parts by weight of sodium gluconate, and 0.2 parts by weight of tributyl phosphate are mixed, stirred, An enhanced cement grinding aid is obtained.

[0029] Add 0.1% of the enhanced cement grinding aid prepared in this example to the fly ash Portland cement with a fly ash content of 30%, and measure its enhancement effect. The results are shown in Table 1.

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Abstract

The invention relates to a reinforced cement grinding aid and a preparation method thereof. The reinforced cement grinding aid is characterized by comprising the following materials in parts by weight: 20-65 parts of mixed solution of sodium polystyrene sulfonate (SPS) and aluminum sulfate, 5-25 parts of alkanolamine, 5-20 parts of polyhydric alcohol, 3-15 parts of saccharides, 0.1-1 part of antifoaming agent and 15-45 parts of water. The reinforced cement grinding aid is prepared by mixing and stirring the mixed solution, alkanolamine, polyhydric alcohol, saccharides, an antifoaming agent and water. Preferably, the sodium polystyrene sulfonate (SPS) is prepared by taking waste polystyrene as the raw material, serves as a long-chain linear macromolecule water-based material and is a surface active agent and a cement dispersing agent as well as an early strength agent and a water reducing agent; the aluminum sulfate is an effective reinforcing agent of Portland cement; and the prepared reinforced cement grinding aid has good grinding aid and reinforcing effects, and the cost is lower than that of the conventional triethanolamine cement grinding aid. According to the method, waste polystyrene plastics are recycled, and no waste acid, waste water and waste residue are discharged. Therefore, the method is environment-friendly and low in cost.

Description

technical field [0001] The invention belongs to the technical field of cement grinding, and relates to an enhanced cement grinding aid and a preparation method thereof, in particular to the use of fly ash as the main mixing material in cement (such as fly ash Portland cement P. In the grinding production of composite Portland cement (P.C) with coal ash as the main admixture, a cement grinding aid and a preparation method thereof can reduce the power consumption of cement grinding and improve the early and late strength of cement. Background technique [0002] In cement production, in order to increase grinding efficiency, reduce mill power consumption, and improve cement quality, a small amount of grinding aid is often added during the grinding process. Cement grinding aids are beneficial to reduce the surface energy of the material during the grinding process, eliminate the static electricity between the fine powder particles of the material, and improve the fluidity of the...

Claims

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Application Information

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IPC IPC(8): C04B24/38C04B24/16C04B22/14C04B103/52
Inventor 李伟峰马素花沈晓冬
Owner JIANGSU JUWEI NEW MATERIALS
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