Chlorine-free low-alkali organic cement grinding aid

A cement grinding aid, an organic technology, applied in the field of cement additives, can solve the problems of difficult control of the accuracy of the addition amount, reduction of cement strength in the later stage, difficult production environment of grinding aids, etc., to achieve low cost, increased strength, adaptability good sex effect

Active Publication Date: 2013-10-23
山东丞华企业投资控股有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are following deficiencies in the grinding aid of the above-mentioned composition: one, chloride ion has stronger corrosion effect to the reinforcing steel bar in the building, and alkali easily forms alkali aggregate effect, and chloride salt and sodium, potassium salt are strictly controlled consumption in relevant standards Early-strength agents, such as cement standards stipulate that the content of chloride ions should not exceed 6 / 10,000; the content of alkali should not exceed 6 / 10,000; 2. Most early-strength agents such as triethanolamine and chloride salts can reduce the later strength of cement; 3. Grinding aids that use triethanolamine as grinding aids have strict requirements on the control of the addition amount. When the addition amount is slightly more than the specified amount, the cement sieve allowance will increase sharply, commonly known as "running coarse". , affected by various factors in the actual production process, the accuracy of the dosage is difficult to control, making it difficult for this type of grinding aid to adapt to the actual production environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] formula:

[0024] Triethanolamine 15Kg Compound alcohol 8 Kg Sucrose residue 60 Kg

[0025] Composite setting time regulator 15 Kg water 6 Kg

[0026] Described triethanolamine is industrial grade 85 mixed amine;

[0027] The complex alcohol is a composition of ethylene glycol and propylene glycol, and the weight ratio of ethylene glycol and propylene glycol is 5:5.

[0028] The brix content of the sucrose residue is about 48, and the Brix is ​​about 70;

[0029] Described composite setting time regulator is the mixture aqueous solution of potassium aluminum sulfate, copper sulfate, ferrous sulfate and sodium silicate, and the weight ratio of potassium aluminum sulfate, copper sulfate, ferrous sulfate, sodium silicate, water is 3:3: 2:50:242.

[0030] Preparation:

[0031] Dissolve potassium aluminum sulfate, copper sulfate and ferrous sulfate in boiling water according to the above formula, then cool down to about 50°C, then add sodium silicate to dissolve, and st...

Embodiment 2

[0035] formula:

[0036] Triethanolamine 12Kg Complex alcohol 6 Kg Sucrose residue 65 Kg

[0037] Composite setting time regulator 17 Kg water 4 Kg

[0038] Described triethanolamine is industrial grade 85 mixed amine;

[0039] The complex alcohol is a composition of ethylene glycol, propylene glycol, and glycerol, and the weight ratio of ethylene glycol, propylene glycol, and glycerol is 5:3:2.

[0040] The brix content of the sucrose residue is about 48, and the Brix is ​​about 70;

[0041] Described composite setting time regulator is the mixture aqueous solution of potassium aluminum sulfate, copper sulfate, ferrous sulfate and sodium silicate, and the weight ratio of potassium aluminum sulfate, copper sulfate, ferrous sulfate, sodium silicate, water is 3:3: 2:40:260.

[0042] Preparation:

[0043] Dissolve potassium aluminum sulfate, copper sulfate, and ferrous sulfate in boiling water according to the above formula, then cool down to about 50°C, then add sodium sili...

Embodiment 3

[0047] formula:

[0048] Triethanolamine 18Kg Complex alcohol 7 Kg Sucrose residue 55 Kg

[0049] Composite setting time regulator 13 Kg water 10 Kg

[0050] Described triethanolamine is industrial grade 85 mixed amine;

[0051] The complex alcohol is a composition of ethylene glycol and propylene glycol, and the weight ratio of ethylene glycol and propylene glycol is 5:5.

[0052] The brix content of the sucrose residue is about 48, and the Brix is ​​about 70;

[0053] Described composite setting time regulator is the mixture aqueous solution of potassium aluminum sulfate, copper sulfate, ferrous sulfate and sodium silicate, and the weight ratio of potassium aluminum sulfate, copper sulfate, ferrous sulfate, sodium silicate, water is 3:3: 2:50:290.

[0054] Preparation:

[0055] According to the above formula, dissolve potassium aluminum sulfate, copper sulfate and ferrous sulfate in boiling water, then cool down to about 50°C, then add sodium silicate to dissolve, and s...

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Abstract

The invention discloses a chlorine-free low-alkali organic cement grinding aid and belongs to the field of dry-mixed mortar additives. The cement grinding aid is made by mixing the following ingredients in parts by weight: 10 to 20 of triethanolamine, 5 to 10 of compound alcohols, 50 to 70 of industrial sugar residues, 10 to 20 of compound setting time regulators and 0 to 20 of water. Compared with the prior art, the cement grinding aid provided by the invention is free of chlorine and low in alkali, allows the cement fineness to maintain stable in case of large addition amount control fluctuation during use, and has the characteristics of energy conservation, environmental friendliness and good applicability.

Description

technical field [0001] The invention relates to the field of cement additives, in particular to a chlorine-free and low-alkali organic cement grinding aid. Background technique [0002] Cement grinding aid is a chemical additive to improve the grinding effect and performance of cement, which can significantly increase the output of cement table and various technical indicators. There are two types of common cement grinding aids: liquid and powder (solid), and now liquid grinding aids are widely used. Foreign countries have begun to study and use grinding aids since the 1930s, while my country has only begun to study and use them since the 1970s, and it has been nearly ten years since large-scale use of liquid grinding aids. The role of grinding aids is mainly early strength and grinding aid, to achieve a more ideal early strength effect. Current liquid grinding aids mainly use chloride salts, sodium and potassium salts as early strength agents, and triethanolamine as grind...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C04B24/12C04B103/52
Inventor赵同习张培清任春燕王爱民王庆珍赵兵江学文
Owner山东丞华企业投资控股有限公司