High-temperature-resistant stone powder adsorption-resistant slump-retaining polycarboxylate superplasticizer and preparation method thereof

A slump-preserving, high-temperature-resistant technology, applied in the field of concrete admixtures, can solve the problems of not being able to meet high-temperature resistance and stone resistance at the same time, poor workability of concrete mixtures, and insufficient initial fluidity of concrete, etc., and achieve good slump. Maintaining properties, improving wrap and wrapping, good workability

Active Publication Date: 2021-10-01
SICHUAN TONGZHOU CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a polycarboxylate water-reducer with high temperature resistance, stone powder adsorption and slump retention and a preparation method thereof, which can effectively solve the problems of existing water-red

Method used

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  • High-temperature-resistant stone powder adsorption-resistant slump-retaining polycarboxylate superplasticizer and preparation method thereof
  • High-temperature-resistant stone powder adsorption-resistant slump-retaining polycarboxylate superplasticizer and preparation method thereof
  • High-temperature-resistant stone powder adsorption-resistant slump-retaining polycarboxylate superplasticizer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A high-temperature-resistant stone-powder-resistant adsorption and slump-retaining polycarboxylate water reducer, which consists of the following components in parts by weight: 340 parts of unsaturated polyether macromonomer with a molecular weight of 3000, 22 parts of unsaturated monocarboxylic acid, maleic acid 7.6 parts of iminoalkyl acid, 5.6 parts of unsaturated phosphoric acid ester, 2.4 parts of unsaturated amino acid monoester, 3.6 parts of oxidizing agent, 0.9 part of reducing agent, and 2.5 parts of chain transfer agent.

[0042] The above-mentioned high-temperature-resistant and anti-stone powder adsorption slump-preserving polycarboxylate water-reducer has a preparation method as follows:

[0043] S1: Weigh each raw material component by weight: successively add 340 parts of ethylene glycol monovinyl polyoxyethylene ether, 3.6 parts of 27.5% hydrogen peroxide and deionized water into the reactor, and stir and dissolve evenly, Be prepared as a mixed bottom ma...

Embodiment 2

[0048] A high-temperature-resistant stone-powder-resistant adsorption and slump-retaining polycarboxylate water reducer, comprising the following components in parts by weight: 345 parts of unsaturated polyether macromonomer with a molecular weight of 4000, 26.5 parts of unsaturated monocarboxylic acid, maleic acid 7.2 parts of iminoalkyl acid, 6 parts of unsaturated phosphoric acid ester, 3.6 parts of unsaturated amino acid monoester, 2.8 parts of oxidizing agent, 0.7 part of reducing agent, and 2.65 parts of chain transfer agent.

[0049] The above-mentioned high-temperature-resistant and anti-stone powder adsorption slump-preserving polycarboxylate water-reducer has a preparation method as follows:

[0050] S1: Weigh each raw material component by weight: sequentially add 345 parts of 4-hydroxybutyl vinyl polyoxyethylene ether macromonomer, 2.8 parts of ammonium persulfate and deionized water into the reactor, and stir to dissolve Evenly, it is prepared into a mixed base ma...

Embodiment 3

[0055] A high-temperature-resistant stone-powder-resistant adsorption and slump-retaining polycarboxylate water reducer, comprising the following components in parts by weight: unsaturated polyether macromonomer 330 with a molecular weight of 3000, 25.4 parts of unsaturated monocarboxylic acid, maleic acid 6.6 parts of amino acid, 6.2 parts of unsaturated phosphoric acid ester, 3.6 parts of unsaturated amino acid monoester, 4.2 parts of oxidizing agent, 0.84 part of reducing agent, and 2.4 parts of chain transfer agent.

[0056] The above-mentioned high-temperature-resistant and anti-stone powder adsorption slump-preserving polycarboxylate water-reducer has a preparation method as follows:

[0057] S1: Weigh each raw material component by weight: successively add 330 parts of ethylene glycol monovinyl polyoxyethylene ether, 2.4 parts of 27.5% hydrogen peroxide, 1.8 parts of ammonium persulfate and deionized water into the reactor , and stir and dissolve evenly, and prepare a m...

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Abstract

The invention discloses a high-temperature-resistant stone powder adsorption-resistant slump-retaining polycarboxylate superplasticizer and a preparation method thereof. The polycarboxylate superplasticizer is prepared from the following components in parts by weight: 320 to 360 parts of unsaturated polyether macromonomer, 20 to 30 parts of unsaturated monocarboxylic acid, 6 to 10 parts of maleimide alkyl acid, 5 to 8 parts of unsaturated phosphate, 2 to 5 parts of unsaturated amino acid monoester, 2.5 to 5.0 parts of oxidant, 0.5 to 1.0 part of reducing agent and 1 to 3 parts of chain transfer agent. The pH value of the water reducing agent is 5.0-7.0, and the solid content of the water reducing agent is 40%-42%. The polycarboxylic acid water reducing agent can effectively solve the problems of insufficient initial fluidity of concrete, too fast slump loss and poor workability of a concrete mixture caused by incapability of simultaneously meeting high temperature resistance and limestone powder adsorption resistance of the existing water reducing agent, and has great significance in widening the engineering application field of the water reducing agent.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a high-temperature-resistant, stone powder-resistant, slump-resistant polycarboxylate water-reducer and a preparation method thereof. Background technique [0002] Polycarboxylate superplasticizer is the most widely used concrete admixture at present. It has outstanding advantages such as low dosage, high water reducing rate, good slump retention performance, strong molecular structure adjustability, simple production process, green and pollution-free, etc. , Widely used in the field of engineering construction and building structures. [0003] In recent years, with the rapid development of my country's infrastructure construction, the demand for concrete has increased year by year, and the use of concrete raw materials has also increased. With the adjustment of the national energy strategy and the development and progress of the electric power field, thermal power g...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F220/06C08F230/02C08F220/34C08F222/40C08F4/40C04B24/26C04B103/30
CPCC08F283/065C08F4/40C04B24/246C04B2103/302C08F220/06C08F230/02C08F220/34C08F222/40Y02W30/91
Inventor 万甜明梁青松何严杨志飞
Owner SICHUAN TONGZHOU CHEM TECH
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