High-adaptability polycarboxylate superplasticizer and preparation method thereof

A polycarboxylic acid, adaptable technology, applied in the field of concrete admixtures, can solve problems such as bleeding phenomenon

Active Publication Date: 2021-04-23
GUANGZHOU INSTITUTE OF BUILDING SCIENCE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a highly adaptable polycarboxylate water reducer to solve the problem of bleeding of concrete mixtures prepared from different types of raw materials, improve the encapsulation and cohesion of concrete mixtures, and ensure concrete mixing construction performance

Method used

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  • High-adaptability polycarboxylate superplasticizer and preparation method thereof
  • High-adaptability polycarboxylate superplasticizer and preparation method thereof
  • High-adaptability polycarboxylate superplasticizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A highly adaptable polycarboxylate water reducer, consisting of the following raw materials in parts by mass:

[0056] 25 parts of polycarboxylic acid mother liquor;

[0057] Bleeding inhibitor 2 parts;

[0058] 2 parts retarder.

[0059] Wherein, the polycarboxylate mother liquor is prepared by the following method:

[0060] S1. Dissolve 350 parts of isopentenol polyoxyethylene ether with a relative molecular weight of 2400 in 350 parts of water, stir evenly at room temperature, and then add 3 parts of hydrogen peroxide to obtain the bottom liquid;

[0061] S2, 30 parts of acrylic acid, 20 parts of hydroxyethyl acrylate, 5 parts of 2-hydroxyethyl acrylate phosphate and 1 part of [2-(methacryloyloxy) ethyl] dimethyl-(3- Sulfonic acid propyl) ammonium hydroxide is dissolved in 44 parts of water, stirs evenly, obtains dropwise liquid DS1;

[0062] S3. Dissolve 1.8 parts of mercaptoethanol and 0.9 parts of sodium formaldehyde sulfoxylate in 100 parts of water, and stir...

Embodiment 2

[0068] A highly adaptable polycarboxylate water reducer, consisting of the following raw materials in parts by mass:

[0069] 25 parts of polycarboxylic acid mother liquor;

[0070] Bleeding inhibitor 1 part;

[0071] 2 parts retarder.

[0072] Wherein, the polycarboxylate mother liquor is prepared by the following method:

[0073] S1. Dissolve 350 parts of isopentenol polyoxyethylene ether with a relative molecular weight of 2400 in 350 parts of water, stir evenly at room temperature, then add 3 parts of sodium perchlorate to obtain the bottom liquid;

[0074] S2, 30 parts of acrylic acid, 20 parts of hydroxyethyl acrylate, 5 parts of 2-methyl-2-acrylic acid-2-hydroxyethyl phosphate and 1 part of [2-(methacryloyloxy) ethyl] Dimethyl-(3-sulfonic acid propyl)ammonium hydroxide was dissolved in 44 parts of water, and stirred evenly to obtain the dripping liquid DS1;

[0075] S3, 1.8 parts of mercaptoethanol and 0.9 parts of sodium bisulfite are dissolved in 100 parts of wate...

Embodiment 3

[0081] A highly adaptable polycarboxylate water reducer, consisting of the following raw materials in parts by mass:

[0082] 25 parts of polycarboxylic acid mother liquor;

[0083] Bleeding inhibitor 1 part;

[0084] 2 parts retarder.

[0085] Wherein, the polycarboxylate mother liquor is prepared by the following method:

[0086] S1. Dissolve 350 parts of prenol polyoxyethylene ether with a relative molecular weight of 2400 in 350 parts of water, stir evenly at room temperature, and then add 3 parts of hydrogen peroxide to obtain the bottom liquid;

[0087] S2. Dissolving 30 parts of acrylic acid, 20 parts of hydroxyethyl acrylate, 5 parts of 2-methyl-2-acrylic acid-2-hydroxyethyl phosphate and 1 part of methacryloyloxyethyltrimethylammonium chloride In 44 parts of water, stir evenly to obtain dropwise solution DS1;

[0088] S3, 1.2 parts of thioglycolic acid and 1.0 part of L-ascorbic acid are dissolved in 100 parts of water, and stirred evenly to obtain the dripping li...

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Abstract

The invention discloses a high-adaptability polycarboxylate superplasticizer and a preparation method thereof, and relates to the field of concrete admixtures. The polycarboxylate superplasticizer is prepared by compounding the following materials in different parts by mass: 20-75 parts of polycarboxylic acid mother liquor, 1-10 parts of a bleeding inhibitor and 1-4 parts of a retarder. The polycarboxylate superplasticizer prepared by the invention is highly adapted to different types of concrete raw materials, especially for different types of fly ash, the bleeding phenomenon of a concrete mixture can be eliminated, the cohesiveness and wrapping property of concrete slurry are remarkably improved, and the construction performance of fresh concrete is improved.

Description

technical field [0001] The invention relates to a polycarboxylate water reducer, which belongs to the field of concrete admixtures, in particular to a highly adaptable polycarboxylate water reducer and a preparation method thereof. Background technique [0002] Polycarboxylate water reducer has many advantages such as high water reducing rate, low dosage, good slump performance, and strong adjustability in molecular structure. It has been widely used in industrial and civil buildings, high-speed railways, roads and bridges, and ports. Port, airport and other engineering construction. However, during the actual application of polycarboxylate superplasticizers, technicians have gradually discovered that the performance of polycarboxylate superplasticizers is easily affected by other raw materials for concrete, especially when the quality of admixtures (such as fly ash) fluctuates . [0003] In the actual production process of concrete, there are many suppliers of concrete ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/16C04B24/26C08F283/06C08F220/06C08F220/20C08F230/02C08F220/38C08F220/36C08F220/34C04B103/30
CPCC04B40/0039C04B24/165C04B24/246C08F283/065C04B2103/302C08F220/06C08F220/20C08F230/02C08F220/387C08F220/365C08F220/34C04B22/149C04B22/16C04B24/003C04B22/12C04B22/142
Inventor 孙申美黄福仁简振威黄文辉钟开红
Owner GUANGZHOU INSTITUTE OF BUILDING SCIENCE CO LTD
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