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A kind of high-performance organic non-alkali expansion agent and preparation method thereof

An alkali expansion agent, high-performance technology, applied in the field of concrete admixtures, can solve problems such as pollution, difficult to adjust performance, unstable performance, etc., achieve high performance, solve the effect of complex production process and low dosage

Active Publication Date: 2018-11-30
孟亚龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the above problems, the present invention designs a high-performance organic alkali-free expansion agent and its preparation method, which is clean, pollution-free, low in dosage, and high-performance, and solves the problem of complex production process, unstable performance and serious pollution of the existing expansion agent. , The problem of high dosage and difficult adjustment of performance

Method used

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  • A kind of high-performance organic non-alkali expansion agent and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A high-performance organic alkali-free expansion agent GWP consists of the following raw materials in parts by weight:

[0026] Component A: 50 parts of modified azodicarbonamide; Component B: 12 ​​parts of sodium bicarbonate; Component C: 8 parts of azobisisobutyronitrile; 15 parts of liquid powder; E component: 5 parts of polyacrylamide; F component: 10 parts of sodium gluconate.

[0027] The retarder is sodium gluconate, sodium citrate or phosphate and the like.

Embodiment 2

[0029] A preparation method of the above-mentioned high-performance organic alkali-free expansion agent, comprising the following steps:

[0030] (1) Dry the mother liquor of ether polycarboxylate high-performance water reducer at 70°C to obtain component D;

[0031] (2) After weighing components D, F, and B according to the above weight ratio, mix and grind them to 300 mesh;

[0032] (3) After weighing A, C, and E according to the above weight ratio, add the mixture obtained in step (2) to the mixer and mix thoroughly to obtain a high-performance organic alkali-free expansion agent.

[0033] The performance parameter test experiment of the product is in accordance with the industry standard test method, and the structure is shown in the table below

[0034] According to GB23439-2009 "Concrete Expansive Agent", the test is as follows:

[0035]

[0036] It can be seen from the above table that the high-performance organic alkali-free expansion agent of the present inventio...

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Abstract

The invention discloses a high performance organic alkali-free expanding agent and a preparation method thereof. The high performance organic alkali-free expanding agent comprises 50 parts of modified azodicarbonamide as an ingredient A, 12 parts of sodium bicarbonate as an ingredient B, 8 parts of azodiisobutyronitrile as an ingredient C, 15 parts of an ether-type polycarboxylate high performance water reducer powder as an ingredient D, 5 parts of polyacrylamide as an ingredient E and 10 parts of a retarder as an ingredient F. The preparation method is convenient and comprises drying an ether-type polycarboxylate high performance water reducer mother liquid at a temperature of 70 DEG C to obtain the ingredient D, weighing the ingredients D, F and B according to the above weight ratio, mixing the ingredients D, F and B, grinding the mixture to obtain powder of 300 meshes, weighing ingredients A, C and E according to the above weight ratio and fully mixing the ingredients A, C and E and the mixed powder to obtain the high performance organic alkali-free expanding agent. The high performance organic alkali-free expanding agent is clean, has no pollution, a low doping amount and high performances and solves the problem that the existing expanding agent production technology has complex processes and produces a product with unstable performances, severe pollution, a high doping amount and difficultly adjustable performances.

Description

technical field [0001] The invention relates to an expansion agent, in particular to a high-performance organic alkali-free expansion agent and a preparation method thereof, belonging to the field of concrete admixtures. Background technique [0002] Concrete expansion agents currently on the market are mainly inorganic high-alkali expansion agents. The content of this expansion agent is as high as 10%, and the alkali content is as high as 10%. The use of this expansion agent in concrete will bring the following problems: 1. Increase the possibility of alkali-aggregate reaction; 2. Influence the strength of concrete; 3. Influence the fluidity of concrete; 4. Inorganic expansion agent requires a large amount of Moisture, thus leading to an increase in the difficulty of concrete maintenance, and it is not suitable for use in arid and water-deficient environments; 5. The cost of concrete has increased significantly. In addition, the raw material for the production of this expa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/26
Inventor 王建东
Owner 孟亚龙