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

A technology for cement and slag, applied in the field of cement containing a large proportion of slag and its preparation, can solve problems such as shortage, and achieve the effects of reducing corrosion, improving the overall anti-sulfuric acid corrosion resistance and salt-freezing erosion resistance, and shortening the final setting time.

Active Publication Date: 2022-07-08
湖北环沙再生资源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, there is currently a lack of a cement containing a large proportion of slag that can meet the above needs and its preparation method in the field.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The specific raw materials are weighed according to Table 1, and the preparation steps are as follows:

[0035] (1) by proportioning triethanolamine is diluted with water, then add sodium phosphate, industrial salt, Yuanming powder and stir to obtain grinding aid;

[0036] (2) mix Portland cement clinker, desulfurized gypsum, fly ash, aluminum sulfate and the grinding aid obtained in step (1) by proportioning, then carry out grinding for 30min to obtain fine powder;

[0037] (3) slag, basic magnesium sulfate crystal whisker, potassium octatitanate crystal whisker, potassium tetratitanate crystal whisker are uniformly mixed by proportioning, and then pulverized for 50min to obtain a blend;

[0038] (4) Mixing the fine powder obtained in step (2) and the blending material obtained in step (3) uniformly, and then baking in a nitrogen-protected environment at 50° C. for 100 min to obtain cement.

Embodiment 2

[0040] (1) by proportioning triethanolamine is diluted with water, then add sodium phosphate, industrial salt, Yuanming powder and stir to obtain grinding aid;

[0041] (2) mix Portland cement clinker, desulfurized gypsum, fly ash, aluminum sulfate and the grinding aid obtained in step (1) by proportioning, and then grind for 40min to obtain fine powder;

[0042] (3) mix slag, basic magnesium sulfate whisker, potassium octatitanate whisker, potassium tetratitanate whisker by proportioning, then carry out grinding for 60min to obtain blend;

[0043] (4) Mixing the fine powder obtained in step (2) and the blending material obtained in step (3) uniformly, and then baking in a nitrogen-protected environment at 60° C. for 90 min to obtain cement.

Embodiment 3

[0045] (1) by proportioning triethanolamine is diluted with water, then add sodium phosphate, industrial salt, Yuanming powder and stir to obtain grinding aid;

[0046] (2) mix Portland cement clinker, desulfurized gypsum, fly ash, aluminum sulfate and the grinding aid obtained in step (1) by proportioning, and then grind for 40min to obtain fine powder;

[0047] (3) mix slag, basic magnesium sulfate whisker, potassium octatitanate whisker, potassium tetratitanate whisker by proportioning, then carry out grinding for 60min to obtain blend;

[0048] (4) Mixing the fine powder obtained in step (2) and the blending material obtained in step (3) uniformly, and then baking in a nitrogen-protected environment at 60° C. for 100 min to obtain cement.

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14C04B18/14C04B14/38
CPCC04B28/144C04B14/383C04B18/141C04B2201/50C04B7/02C04B18/08C04B22/148C04B2103/52Y02W30/91
Inventor 陈辉曹国兵徐新强
Owner 湖北环沙再生资源有限公司
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