Use of tri-isopropanolamine in cement grinding aid

Abstract

The present invention relates to the application of triisopropanolamine in cement grinding aid. The cement grinding aid contains triisopropanolamine 40-100 wt%, triethanolamine 0-15 wt%, assistant 0-25wt%, and water 0-30wt%. The assistant is one or several kinds of carboxylic acid, lignosulfonate and alkay sulfonate. The cement grinding aid with triisopropanolamine has high grinding aiding effect, can raise the later stage strength of cement obviously, and has low cost and wide application foreground.

Description

technical field [0001] The invention relates to the application of triisopropanolamine in cement grinding aids, belonging to cement additives. Background technique [0002] Cement grinding is a necessary process in cement production. It uses mechanical methods to make cement finer, which is a process of particle size change and mechanochemical change. During the crushing process of cement colliding with the ball forging medium, etc., the internal electric price bond of the particles is cut off, thereby forming a charge unit, generating static electricity, and the particles are easy to re-agglomerate into agglomerates or adsorb on the surface of the medium, so over-powdering will occur. Grinding or ball paste grinding phenomenon. Cement grinding aid is an additive with strong surface activity and dispersibility. It is easy to be adsorbed on the surface and gaps of the material, which can reduce the interfacial tension of the material, and at the same time play the role of lu...

AI Technical Summary

Problems solved by technology

Although the cement grinding aids containing triethanolamine currently available on the market can improve the early strength of cement, the later strength is poor, and the domestic production level of triethanolamine is relatively low. At present, the dependence on imports is high, the price is expensive, and the cost is too high.

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