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Manganese slag supersulfate cement and preparation method thereof

A technology of supersulfate cement and sulfate, applied in the field of special cement, can solve the problems of low early strength, long setting time, shortening the setting time of supersulfate cement, etc., to prolong the acceleration period and deceleration period, save heap The effect of saving land and saving resources

Inactive Publication Date: 2020-02-21
中建西部建设新疆有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are two very serious shortcomings in the super sulfate cement produced in this way: one is that the setting time of super sulfate cement is too long, and the other is that the early strength of super sulfate cement is too low
Aiming at the shortcoming of traditional super sulfate cement with too long setting time, domestic laboratories use self-prepared chemical activators to change the dosage of activators, and conclude that self-prepared appropriate amount of chemical activators can effectively shorten the setting time of super sulfate cement ; Aiming at the problem of low early strength of traditional super sulfate cement, the study found that if high activity slag (Al 2 o 3 slag with high content) can solve the problem of low early strength of super sulfate cement
At present, slag has been widely used in the world to obtain super sulfate cement, but there is no relevant patent for using manganese slag to produce new manganese slag super sulfate cement

Method used

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  • Manganese slag supersulfate cement and preparation method thereof
  • Manganese slag supersulfate cement and preparation method thereof
  • Manganese slag supersulfate cement and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Grind manganese slag and granulated blast furnace slag to a specific surface area of ​​400m 2 / Kg~450m 2 / Kg, grind desulfurized gypsum, sodium sulfate, cement clinker, and calcium carbonate until the specific surface area is 450m 2 / Kg~500m 2 / Kg, then formula one according to Table 2 (wherein the manganese slag dosage is 40%, the granulated blast furnace slag dosage is 40%, the desulfurization gypsum dosage is 10%, the sodium sulfate dosage is 5%, the cement clinker dosage is 3%, the carbonic acid Calcium content is 2%) proportional metering and weighing, each raw material is fully mixed uniformly in the forced mixer, and the unloaded material is the prepared novel manganese slag super sulfate cement. The chemical composition analysis of the super sulfate cement is shown in Table 3. The test results of physical and mechanical properties of the corresponding cement are shown in Table 4. From the performance index of formula 1 in Table 4, it can be seen that the set...

Embodiment 2

[0034] Grind manganese slag and granulated blast furnace slag to a specific surface area of ​​400m 2 / Kg~450m 2 / Kg, grind phosphogypsum, potassium sulfate, cement clinker, and potassium carbonate until the specific surface area is 450m 2 / Kg~500m 2 / Kg, then formula two according to Table 2 (wherein the manganese slag dosage is 30%, the granulated blast furnace slag dosage is 50%, the phosphogypsum dosage is 10%, the potassium sulfate dosage is 5%, the cement clinker dosage 3%, and the potassium carbonate dosage is 2%), and each raw material is fully ground in a cement mill to prepare manganese slag super sulfate cement. The chemical composition analysis of the super sulfate cement is shown in Table 3. The test results of physical and mechanical properties of the corresponding cement are shown in Table 4. It can be seen from the performance index of formula 2 in Table 4 that the setting time of the manganese slag super sulfate cement is normal, and the flexural and compres...

Embodiment 3

[0036] Grind manganese slag and granulated blast furnace slag to a specific surface area of ​​400m 2 / Kg~450m 2 / Kg, grind dihydrate gypsum, magnesium sulfate, calcium hydroxide, and potassium carbonate until the specific surface area is 450m 2 / Kg~500m 2 / Kg, formula three according to Table 2 (wherein the manganese slag dosage is 40%, the granulated blast furnace slag dosage is 40%, the dihydrate gypsum dosage is 10%, the magnesium sulfate dosage is 5%, the calcium hydroxide dosage is 4.95%, the carbonic acid Potassium dosage is 0.05%) proportional metering and weighing, and each raw material is prepared in the fully grinding in the cement mill that the specific surface area is 475m 2 / Kg manganese slag super sulfate cement. The chemical composition analysis of the super sulfate cement is shown in Table 3. The test results of physical and mechanical properties of the corresponding cement are shown in Table 4.4. It can be seen from the performance index of formula 3 in T...

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Abstract

The invention belongs to the technical field of special cement, and particularly relates to a manganese slag supersulfate cement and a preparation method thereof. The manganese slag supersulfate cement is prepared from the components in percentage by weight: 30-40% of manganese slag, 25%-50% of granulated blast furnace slag powder, 10-20% of sulfates, 5%-10% of a sulfate activator, 1-5% of an alkaline component and 0.05-2% of an alkaline activator. The manganese slag which is a high-temperature slag waste discharged during the blast furnace smelting process of manganese iron or silicomaganeseis used as a main raw material, a material science principle is combined, the mineral characteristics of manganese slag and slag are taken as a basis, the potential hydration activity of the manganeseslag is activated by using sulfates and alkaline environment to form the initial strength, and novel manganese slag supersulfate cement with excellent properties is further designed.

Description

technical field [0001] The invention belongs to the technical field of special cement, and in particular relates to a manganese slag super sulfate cement and a preparation method thereof. Background technique [0002] Concrete is the most used building material, and cement is one of the important materials that make up concrete. With the continuous growth of my country's GDP and urbanization, the total output of cement has grown rapidly since 1980. In the past 40 years, the total GDP and total cement output have grown steadily, and the growth rate has become higher and higher. The total output of Portland cement has increased from several million tons to 1.6 billion tons. [0003] The output of cement is so large, but the cement clinker required to produce ordinary Portland cement needs to go through the "two grinding and one burning" process, which requires a large amount of raw materials such as limestone, clay and non-renewable resource coal, and also requires a small amo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B11/26
CPCC04B11/26C04B11/264
Inventor 艾洪祥李增亮孟书灵王军张平岳彩虹
Owner 中建西部建设新疆有限公司
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