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A kind of hydroxypiperazine concrete glue reducer and preparation method thereof

A kind of concrete-like, hydroxypiperazine technology, applied in the field of hydroxypiperazine-based concrete glue reducer and its preparation, can solve the problems of poor performance of the glue reducer, influence on the anti-freezing ability of concrete, and limitation of the use range of the glue reducer, etc. Ease of operation, improved frost resistance, and the effect of increasing hydration rate

Active Publication Date: 2022-07-08
浙江鑫月新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since this glue reducer contains about 10% sodium sulfate, the solubility of sodium sulfate, the main component of sodium sulfate, will drop sharply under low temperature conditions, making the performance of the glue reducer worse and affecting the frost resistance of concrete. The use of glue reducers is also limited

Method used

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  • A kind of hydroxypiperazine concrete glue reducer and preparation method thereof
  • A kind of hydroxypiperazine concrete glue reducer and preparation method thereof
  • A kind of hydroxypiperazine concrete glue reducer and preparation method thereof

Examples

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Effect test

Embodiment 1

[0031] A hydroxypiperazine type concrete glue reducer and preparation method thereof, comprising the following raw materials by weight:

[0032]

[0033] The preparation method of a hydroxypiperazine concrete glue reducer according to the present invention is realized by the following steps:

[0034] 1) N-Hydroxyethylpiperazine, pentasodium diethylenetriaminepentacarboxylate and sodium nitrate are added to the condensation reaction tank, add a certain amount of water to open stirring and gradually heat up, and be warming up to 80 °C after the raw materials are dissolved. ℃ and constant, holding the reaction for 1.2h;

[0035] 2) then add fumaric acid and polyethylene glycol (400) to the reaction tank, after stirring, start to drip the ammonium persulfate solution whose mass percentage concentration is 7% in the solution system, and the temperature is controlled at 85 ℃, control the dripping speed, ensure that the dripping time is 2h, and continue the constant temperature r...

Embodiment 2

[0038] A hydroxypiperazine type concrete glue reducer and preparation method thereof, comprising the following raw materials by weight:

[0039]

[0040] The preparation method of a hydroxypiperazine concrete glue reducer according to the present invention is realized by the following steps:

[0041] 1) N,N'-bis(2-hydroxyethyl)piperazine, pentasodium diethylenetriaminepentacarboxylate, sodium nitrate are added to the condensation reaction tank, add a certain amount of water to open stirring and gradually heat up, After the raw materials are dissolved, the temperature is raised to 85 °C and kept constant, and the reaction is kept for 1 h;

[0042] 2) then add fumaric acid and polyethylene glycol (400) to the reaction tank, after stirring, start to drip the ammonium persulfate solution whose mass percentage concentration is 5% in the solution system, and the temperature is controlled at 85 ℃, control the dripping speed, ensure that the dripping time is 1.8h, and continue the...

Embodiment 3

[0045] A hydroxypiperazine type concrete glue reducer and preparation method thereof, comprising the following raw materials by weight:

[0046]

[0047] The preparation method of a hydroxypiperazine concrete glue reducer according to the present invention is realized by the following steps:

[0048] 1) N,N'-bis(2-hydroxypropyl)piperazine, pentasodium diethylenetriaminepentacarboxylate, potassium nitrate are added to the condensation reaction tank, add a certain amount of water to open stirring and gradually heat up, After the raw materials are dissolved, the temperature is raised to 90°C and kept constant, and the reaction is kept for 1.2h;

[0049]2) then add fumaric acid and polyethylene glycol (800) to the reaction tank, after stirring, start to drip the ammonium persulfate solution whose mass percentage concentration is 6% in the solution system, and the temperature is controlled at 90 ℃, control the dripping speed, ensure that the dripping time is 2h, and continue th...

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Abstract

The invention discloses a hydroxypiperazine type concrete glue reducer and a preparation method thereof. The concrete glue reducer is composed of the following substances by weight: 15-25% of reinforcing agent, 10-20% of fumaric acid, diethylene 8-15% of pentasodium triaminepentacarboxylate, 5-10% of nitrate, 3-8% of dispersant, 0.5-3% of initiator, and the balance of water. In the present invention, the piperazine polymer can promote the formation of ettringite crystals such as tricalcium aluminate in the concrete slurry, form an early skeleton, and promote the improvement of the strength of the concrete; the dispersant can fully disperse the fine particles of the cement, so that the utilization of the cement in the concrete is improved. Under the synergistic effect of each component, this glue reducer can significantly improve the early strength and late strength of concrete. In addition, the glue reducing agent can improve the frost resistance of concrete, so that the concrete can also exert its proper working performance in a low temperature environment.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a hydroxypiperazine type concrete glue reducer and a preparation method thereof. Background technique [0002] With the vigorous development of modern industry, concrete is widely used as a building material. Cement is the main raw material for producing concrete, and the cost of cement is also the highest among the components of concrete. For a long time, cement has been widely used as an important cementitious material in civil engineering, water conservancy, national defense and other projects. Research at home and abroad has shown that about 10-20% of the cement in the concrete has insufficient hydration reaction in the conventional environment, and only plays a filling role in the concrete, which causes the cement to not effectively exert its due strength, which is the largest cost in the concrete. waste. [0003] Concrete glue reducer is a new type of additive...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/28
CPCC04B40/0039C04B24/128C04B24/04C04B24/123C04B22/085C04B24/28C04B22/14Y02W30/91
Inventor 徐锋
Owner 浙江鑫月新材料科技有限公司
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