Cement grinding aid, preparation method therefor and application thereof

Abstract

The present invention discloses a cement grinding aid, a preparation method therefor and application thereof. The cement grinding aid comprises the following components in parts by weight: 2-7 parts of trinitrometaphenylidyne triamine, 3-7 parts of benzyl ethylaniline, 2-4 parts of terpene phenolic resin, 9-21 parts of fly-ash, 6-8 parts of titanium dioxide, 2-5 parts of silica, 4-8 parts of methacrylate acid, 2-7 parts of polylactic acid-trimethylene carbonate, 5-9 parts of polyvinylidene, 10-50 parts of triethanolamine sulfate, 2-5 parts of amide glutaric acid amine and 6-12 parts of phthalate. According to the method disclosed by the present invention, a surface of the cement grinding aid has good dispersibility and high fluidity, so that strength and a degree of dispersion and dissociation of cement can be improved.

Description

technical field [0001] The invention belongs to the field of chemical building materials, in particular to a cement grinding aid and its preparation method and application. Background technique [0002] In the cement production process, cement grinding aids have been widely used in the grinding of cement materials. As a process admixture in the cement production process, cement grinding aids can not only improve the efficiency of cement grinding in the cement production process (abbreviated as improving production), and by changing the hydration rate of cement, the 3-day and 28-day compressive strength of cement (referred to as strengthening) can be improved. Adaptability, while the strengthening effect mainly depends on the interaction between the various substances that make up the grinding aid and the various mineral components of the cement. It depends on the mineral composition of the cement, which requires that the formula of the cement grinding aid should not only be...

AI Technical Summary

Problems solved by technology

The actual situation is: the current cement grinding aids are all produced and prepared by the cement grinding aid enterprise and transported to the cement production site through filling. In the whole process of continuous cement production, according to the amount of materials in the cement mill It is required to add the cement grinding aid to the cement mill quantitatively by controlling the delivery pump. When the working state of the cement mill in the cement enterprise or the various mineral components of the cement change, the traditional preparation and use of this grinding aid is very difficult. It is difficult to adjust the formula of cement grinding aids in a timely manner; in addition, because cement grinding aids are formed by physically mixing two or more raw material liquids in a certain proportion, a long time will not only cause the stratification of raw material liquids, but also easily produce chemical complexation and Addition reaction, resulting in changes in the composition of cement grinding aids

Based on the above two reasons, when the current cement grinding aid products are used in the cement production process, the effect is unstable, which seriously affects the product quality and reduces the benefit of the enterprise.

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