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Environment-friendly cement technological additive

An admixture and environment-friendly technology, applied in the field of environment-friendly cement process admixtures, can solve problems such as inconvenience and achieve the effects of saving power consumption, good chrome removal effect and good grinding aid effect.

Inactive Publication Date: 2017-05-17
志成信(天津)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] CN102515622A discloses a chromium removal grinding aid for cement and a preparation method thereof. The chromium removal grinding aid is added in the cement grinding stage, and has a grinding and strengthening effect on cement, and simultaneously has a chromium removal effect, but the chromium removal aid The grinding is in a powder state, and it is very inconvenient to install a special metering and conveying device when adding

Method used

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  • Environment-friendly cement technological additive

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Effect test

Embodiment 1

[0021] An environment-friendly cement process admixture, which is composed of the following substances in weight percentage: 10% of grinding aid components, 10% of reinforcing components, 10% of hexavalent chromium reducing components, 2% of solubilizing components, and the balance for water;

[0022] The grinding aid component is composed of triethanolamine and triisopropanolamine in a weight ratio of 1:1;

[0023] The reinforcing component is composed of sodium formate and magnesium sulfate in a weight ratio of 1:1;

[0024] The hexavalent chromium reduction component is composed of ascorbic acid and diacid block in a weight ratio of 1:1;

[0025] The solubilizing component is composed of urea and sodium salicylate in a weight ratio of 1:1.

Embodiment 2

[0027] An environment-friendly cement process admixture is composed of the following raw materials: 20% of grinding aid components, 20% of reinforcing components, 20% of hexavalent chromium reducing components, 5% of solubilizing components, and the balance is water;

[0028] The grinding aid component is triethanolamine lauryl sulfate;

[0029] The reinforcing component is composed of sodium acetate and sodium benzoate in a weight ratio of 2:1;

[0030] The hexavalent chromium reducing component is sodium hypophosphite;

[0031] The solubilizing component is urea.

Embodiment 3

[0033] An environment-friendly cement process admixture is composed of the following raw materials: 12% of grinding aid components, 15% of reinforcing components, 13% of hexavalent chromium reducing components, 3% of solubilizing components, and the balance is water;

[0034] The grinding aid component is composed of hexamethylenetetramine, tripropylene glycol and triethanolamine lauryl sulfate in a weight ratio of 3:2:1;

[0035] The reinforcing component is composed of sodium benzoate and magnesium sulfate in a weight ratio of 1:1;

[0036] The hexavalent chromium reducing component is composed of ascorbic acid, diacid, sodium hypophosphite and carbohydrazide in a weight ratio of 1:3:2:1;

[0037] The solubilizing component is composed of sodium salicylate and acetamide in a weight ratio of 2:1.

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Abstract

The invention belongs to the technical field of environmental protection and specifically relates to an environment-friendly cement technological additive. The additive is prepared from the following raw materials: 10%-20% of grinding aid, 10%-20% of reinforcing component, 10%-20% of hexavalent chromium reducing component, 2%-5% of cosolvent and the balance of water. The environment-friendly cement technological additive has a good grinding-aiding effect; the output of the grinding machine can be increased by above 10%; the power consumption for grinding the cement is saved; the reinforcing effect is good; after the cement technological additive is added, the 3d strength of the cement is increased by above 4MPa and 28d strength is increased by above 6MPa; under the condition of unchanged cement performance, above 12% of the clinker dosage can be reduced; above 12% of the industrial residue is additionally used, so that the resource is saved and the environment is protected; a chromium removing effect is excellent; and more than 90% of water-soluble hexavalent chromium in the cement can be reduced.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to an environmental-friendly cement process admixture. Background technique [0002] Water-soluble hexavalent chromium (Cr(VI) or Cr 6+ ) is a highly toxic element in cement heavy metals. It can cause harm to the human body through skin contact, respiratory inhalation, and environmental exposure. As people pay more and more attention to environmental and health issues, the problem of hexavalent chromium in cement are also receiving increasing attention. After the cement is mixed with water, the water-soluble Cr(VI) contained in it dissolves rapidly. At this time, if the freshly mixed cement paste, mortar or concrete in the plastic stage is used, if reasonable labor protection measures are not taken, due to the strong oxidation of hexavalent chromium For sensitive people, it will cause skin allergies, so that cement allergic contact eczema that is diffi...

Claims

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Application Information

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IPC IPC(8): C04B24/16C04B103/52
CPCC04B40/0039C04B2103/52C04B24/122C04B24/04C04B22/142C04B24/126C04B24/06C04B24/045C04B24/16C04B22/16C04B24/124C04B24/02C04B24/121
Inventor 刘函邦
Owner 志成信(天津)科技有限公司
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