Modified desulphurization gypsum-based mater batch and preparation method therefor

Abstract

The invention discloses modified desulphurization gypsum-based mater batch and a preparation method therefor. The master batch can replace cement as a gel material in concrete. The master batch comprises the following components in parts by mass: 400-750 parts of desulphurization building gypsum, 50-300 parts of slag powder, 50-350 parts of coal ash and 30-200 parts of cement as well as a proper amount of additives. By adopting a method of adding a proper amount of inorganic materials such as coal ash, slag powder and the like and related additives, the water consumption of the modified desulphurization gypsum is reduced, the compactness of the material is improved, and the water adsorption of the material is reduced, so that the water resistance and mechanical property of the material are improved. By fully using wastes, such as desulphurization gypsum, coal ash and the like, of a power plant to prepare the gel material, comprehensive re-utilization of waste resources is achieved, so that the environmental pollution is favorably reduced, and meanwhile, the master batch has a huge economical benefit.

Description

technical field [0001] The invention belongs to the technical field of concrete, and relates to a modified desulfurized gypsum-based masterbatch and a preparation method thereof. Background technique [0002] Gypsum has the advantages of wide sources and stable performance. However, due to its crystal structure, gypsum products have a loose and porous structure and a high water absorption rate, so water resistance is poor. Generally, the saturated strength is only about 1 / 3 of the dry strength. Therefore, most of the gypsum is used to produce gypsum boards, gypsum blocks, plaster plaster, etc., and because the gypsum material is brittle, it is easy to break during transportation and installation, which greatly limits its use. [0003] Another important use of gypsum is as a retarder in cement production, which not only plays an important role in adjusting the setting time of cement, but also effectively improves the strength of cement. Usually, the term concrete refers to t...

AI Technical Summary

Problems solved by technology

At present, the activation of fly ash is mainly through mechanical grinding or chemical methods, and there is a lack of efficient and low-cost methods.

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