High-limestone-flour-adulterate-amount composite enhanced grinding aid for cement and preparation method of high-limestone flour-adulterate amount composite enhanced grinding aid

Abstract

The invention relates to a high-limestone-flour-adulterate-amount composite enhanced grinding aid for cement and a preparation method of the high-limestone-flour-adulterate-amount composite enhanced grinding aid. The preparation method comprises the following steps that 1, materials including 18%-25% of triethanolamine, 8%-15% of triisopropanolamine, 20%-28% of ethanediol, 8%-12% of molasses, 4%-8% of polycarboxylate superplasticizer, 6%-10% of sodium sulfate, 5%-8% of glacial acetic acid and 2%-24% of water are taken; 2, the water is poured into an agitator kettle, and sodium sulfate is added to be stirred till sodium sulfate is completely dissolved; 3, glacial acetic acid is added to be completely dissolved, triethanolamine, triisopropanolamine, ethanediol, molasses and polycarboxylate superplasticizer are sequentially added after glacial acetic acid is dissolved, stirring continues to be carried out for 20-30 minutes, and the high-limestone flour-adulterate amount composite enhanced grinding aid is obtained. The high-limestone-flour-adulterate-amount composite enhanced grinding aid has the advantages that cement particles are prevented from clustering, and the cement particles are kept in a high homodisperse state; the strength of an interfacial transition zone is increased, and the strength of the cement is further increased; the grinding aiding efficiency of the grinding aid is improved.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a composite enhanced grinding aid for cement with high limestone powder content and a preparation method thereof. Background technique [0002] my country is a big country in cement production, and the output of cement is huge every year. In the grinding process of cement production, when the cement particles are ground to a certain fineness, they will agglomerate due to the electrostatic force generated by the breakage of Si-O and Ca-O bonds, resulting in Grinding efficiency dropped sharply. One way to improve this situation is to add grinding aids in the grinding process. The application of grinding aids has great practical significance for energy saving and emission reduction in my country. Nowadays, the research on traditional grinding aids is quite mature. On the one hand, the use of grinding aids can improve grinding efficiency and reduce energy consumption. On...

AI Technical Summary

Problems solved by technology

Nowadays, the research on traditional grinding aids is quite mature. On the one hand, the use of grinding aids can improve grinding efficiency and reduce energy consumption. On the other hand, it can improve the performance of cement. However, for high limestone powder There is still little research on grinding aids for cement.

[0003] The existing high-efficiency cement liquid grinding aids have too high dosage when used, and are only suitable for traditional cement, and cannot meet the requirements of cement with high limestone powder content.

[0004] Although there are currently many invention patents involving grinding aids that can improve the early and late strength of cement, there are still some problems in the actual use process. Some processes are relatively complicated, not easy to industrialize, the performance is not stable, and some costs are too high. And it does not have much effect on cement with high limestone powder content

[0005] All in all, there is currently no enhanced grinding aid suitable for cement with high limestone powder content, strong compatibility, simple process, and excellent performance.

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