Special grinding aid for maritime work cement and preparation method thereof

Abstract

The invention discloses a special grinding aid for maritime work cement and a preparation method of the special grinding aid. The special grinding aid for maritime work cement is prepared from the following raw materials: 5-9% of grinding aid mother liquor, 13-18% of an industrial salt, 3-9% of a superplasticizer, 7-15% of slag powder, 3-5% of limestone powder, 3-8% of silica fume and 36-66% of fly ash; specifically, the percentages are mass percentages. By using the superplasticizer with high dispersion performance, cement particles can be highly dispersed, and in addition, through dispersionpermeation, charges carried by the cement particles are neutralized, so that the agglomeration phenomenon is reduced. Slag powder, limestone powder and fly ash are used, so that hydration heat of marine cement can be remarkably reduced, adiabatic temperature rise in concrete is reduced, temperature stress caused by internal and external temperature difference is reduced, generation of concrete temperature cracks is prevented, the overall integrity of a concrete structure is guaranteed, therefore, the corrosion resistance and the durability of the concrete structure are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of marine cement production, and in particular relates to a special grinding aid for marine cement and a preparation method thereof. Background technique [0002] At present, with the growth of social economy, my country's marine engineering construction industry has gained a wide range of development space, and with the advent of the information age, more and more new science and technology have been developed and used in the construction of marine engineering projects. But even so, it is still unavoidable that some natural factors have an impact on marine engineering buildings, such as salt spray, medium erosion and wave erosion, and many other inevitable natural factors, and it is precisely because of the existence of these factors that the service life of marine concrete Caused a great negative impact, prompting the emergence of building water heating phenomenon. This in turn leads to cracks in the part...

AI Technical Summary

Problems solved by technology

Due to the particularity of marine cement, the addition of special grinding aids for general marine cement is not conducive to the production and use of marine cement

Generally, the special grinding aids for marine cement will stimulate the cement in the early stage to promote the rapid hydration of the cement, which will release a large amount of hydration heat and cause cracks in the marine concrete structure, and the special grinding aids for ordinary marine cement cannot help the marine cement to resist Erosion by seawater, thus reducing durability

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