A kind of cement containing large proportion of slag and preparation method thereof

Abstract

The invention relates to a cement containing a large proportion of slag and a preparation method thereof. The cement is composed of the following raw materials in parts by weight: 90-100 parts of Portland cement, 10-15 parts of gypsum, 10-20 parts of fly ash, 70-90 parts of slag, 15-20 parts of magnesium sulfate whiskers, titanium 22-36 parts of potassium acid whiskers, 10-16 parts of aluminum sulfate, and 7.2-12.2 parts of grinding aid. The invention effectively improves the compressive strength and flexural strength of the Portland cement by adding potassium titanate whiskers into the cement, which is superior to the ordinary Portland cement on the market. In the invention, by adding a mixture of potassium tetratitanate whiskers and potassium octatitanate whiskers, the whiskers are better adsorbed on the surface of the slag, thereby reducing the corrosion of the slag powder by the alkaline environment, and at the same time, it can further improve the overall cement. The corrosion resistance of sulfuric acid and the resistance to salt freezing corrosion can shorten the final setting time, which is conducive to the solidification and hardening of cement.

Description

technical field

[0001] The invention relates to the technical field of building material preparation, in particular to a cement containing a large proportion of slag and a preparation method thereof. Background technique

[0002] Cement, powdery hydraulic inorganic cementitious material, can be hardened in air or better hardened in water, and can be firmly cemented together with sand, stone and other materials; it is an important It is widely used in civil engineering, water conservancy, national defense and other projects.

[0003] At present, the most widely used general-purpose Portland cement has the following disadvantages: high heat of hydration, poor sulfate corrosion resistance, poor impermeability, and low compactness. Slag Portland cement is based on ordinary slag Portland cement and mixed with an appropriate amount of granulated blast furnace slag. In terms of performance, it has better resistance to sulfate erosion, heat resistance and water resistance, and heat...

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