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Additives capable of increasing slag activity

A technology of admixture and steel slag, applied in the field of steel slag admixture, can solve the problems of later strength influence

Active Publication Date: 2016-07-20
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current experiments show that triethanolamine can promote the activity of steel slag to a certain extent, and the increase in the early strength is obvious, but it will have a certain impact on the later strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 15 parts of diethanol monoisopropanolamine, 20 parts of calcium disodium edetate, 15 parts of monoethanol diisopropanolamine and 50 parts of water.

[0019] Add water into the reaction kettle, then dropwise add diethanol monoisopropanolamine, disodium calcium edetate and monoethanol diisopropanolamine, and continue stirring for 10 minutes to obtain a finished product. The dosage of admixture is selected as 0.012% for testing.

Embodiment 2

[0021] Take 20 parts of diethanol monoisopropanolamine, 30 parts of disodium calcium edetate, 20 parts of monoethanol diisopropanolamine and 30 parts of water.

[0022] Add water into the reaction kettle, then dropwise add diethanol monoisopropanolamine, edetate disodium calcium and monoethanol diisopropanolamine, and continue stirring for 15 minutes to obtain the finished product. The dosage of admixture is selected as 0.01% for testing.

Embodiment 3

[0024] Take 25 parts of diethanol monoisopropanolamine, 15 parts of monoethanol diisopropanolamine, 20 parts of calcium disodium edetate and 40 parts of water.

[0025] Add water into the reaction kettle, then dropwise add diethanol monoisopropanolamine, edetate disodium calcium and monoethanol diisopropanolamine, and continue stirring for 20 minutes to obtain the finished product. The dosage of admixture is selected as 0.012% for testing.

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PUM

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Abstract

The invention relates to additives capable of increasing slag activity and belongs to the technical field of additives. The additives are characterized by mainly comprising ethylenediamine tetraacetic acid disodium calcium, diethanol isopropanolamine, monoethanol diisopropanolamine and water. The additives have the advantages that the additives have a good complexing effect in an alkaline environment and can promote the dissolving of compact mineral components on the surface layer of slag, the dissolving speed of the mineral components of the slag is increased continuously under the continuous complexing effect of polyhydric alcohol amine, the hydration speed of the slag can be increased, and the activity of slag of various ages can be increased; the adding amount of the additives is 0.005-0.012% of the weight of the slag, and 7-day activity and 28-day activity can be increased by 11-15%.

Description

technical field [0001] The invention relates to a steel slag admixture, in particular to an admixture capable of improving the activity of steel slags of different ages, and belongs to the technical field of admixtures. Background technique [0002] Steel slag is the waste slag produced during steelmaking, and its emission is large, accounting for about 12.09% of the waste gas in the iron and steel industry, and has accumulated about 300 million tons. In our country, most of the steelmaking enterprises are distributed in big cities, and the massive accumulation of steel slag has caused a huge waste of land resources, and the steel slag contains a lot of free calcium oxide and magnesium oxide, which will cause the surrounding soil to Alkalinization, the pH value of water or river water rises, which seriously pollutes the ecological environment of the whole city. Since steel slag is very close to Portland cement clinker in terms of chemical composition and mineral composition...

Claims

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Application Information

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IPC IPC(8): C04B5/06
CPCC04B5/06
Inventor 王剑锋崔素萍杨松格王雪莉王亚丽兰明章
Owner BEIJING UNIV OF TECH
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