Slump-loss-resistant and mud-resistant polycarboxylic acid with high performance and preparation method of polycarboxylic acid

A mud-resistant, high-performance technology, applied in the field of building materials, can solve the problems of high equipment requirements, poor adaptability of sand and gravel materials, singleness, etc., and achieve the effect of high water reduction rate and good slump retention ability.

Inactive Publication Date: 2018-01-19
JIANGSU BAIRUIJI NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The effect of inorganic substances is very single, and it is only suitable for soil with a certain composition. It has poor adaptability to low-quality sand and gravel materials, and the dosage is not easy to control. High, and there is pollution, the synthetic anti-sludge agent and slump-retaining agent need to be compounded with polycarboxylate superplasticizer, which makes the concrete production process complicated

Method used

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  • Slump-loss-resistant and mud-resistant polycarboxylic acid with high performance and preparation method of polycarboxylic acid
  • Slump-loss-resistant and mud-resistant polycarboxylic acid with high performance and preparation method of polycarboxylic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of preparation method of high-performance anti-slump anti-sludge type polycarboxylic acid, its steps are as follows: add 300g isopentenol polyoxyethylene ether, 250g deionized water in the four-necked flask of 1L capacity, stir and dissolve, after dissolving completely Add solution C directly to the bottom of the reaction kettle, and then add solution A and solution B dropwise at the same time ten minutes later; add solution A dropwise for 4 hours, and solution B dropwise for 4.5 hours, if the system temperature exceeds 45°C during the dropwise addition, turn on the cooling system Cool down to keep the temperature in the reactor at 42-45°C; after the dropwise addition, mature for 2 hours, add 169g of deionized water to adjust the obtained product to 40% solid content; that is, the finished product PC- 1.

[0028] The A solution is composed of 25g acrylic acid, 35g hydroxyethyl acrylate, 30g dimethylaminoethyl methacrylate and 30g deionized water;

[0029] Descri...

Embodiment 2

[0032] A kind of preparation method of high performance anti-cold mud type polycarboxylic acid, its steps are as follows: add 300g isopentenol polyoxyethylene ether, 5g acrylic acid and 250g deionized water in the four-necked flask of 1L capacity, stir and dissolve, Add 3.5g of ammonium persulfate after the dissolution is complete, then add solution A, solution B and solution C dropwise after ten minutes; add solution A for 4 hours, solution B and solution C for 4.5 hours, if the system temperature exceeds 45°C, turn on the cooling system to cool down, so that the temperature in the reactor is maintained at 42-45°C; after the dropwise addition, mature for 2 hours, add 76g of deionized water to adjust the obtained product to 40% solid content; obtain polycarboxylic acid High performance slump retaining agent PC-2.

[0033] The A solution is composed of 20g acrylic acid, 35g hydroxyethyl acrylate, 30g dimethylaminoethyl methacrylate and 30g deionized water;

[0034] Described B...

Embodiment 3

[0037] A preparation method of high-performance anti-cold and anti-mud polycarboxylic acid, the steps are as follows: add 300g prenol polyoxyethylene ether and 250g deionized water into a four-necked flask with a capacity of 1L, stir and dissolve, and dissolve it completely Add 3.5g of ammonium persulfate, and add solution A, solution B and solution C dropwise after ten minutes; add solution A for 4 hours, and solution B and solution C for 4.5 hours. If the temperature of the system exceeds 45°C during the dropping process, Then turn on the cooling system to cool down, so that the temperature in the reactor is maintained at 42-45°C; after the dropwise addition, mature for 1.5 hours, add 83g of deionized water to adjust the obtained product to 40% solid content. That is to obtain the finished product PC-3 of polycarboxylic acid high-performance slump-retaining agent.

[0038] The A solution is composed of 25g acrylic acid, 20g hydroxyethyl acrylate, 15g methyl acrylate, 30g dim...

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Abstract

The invention provides slump-loss-resistant and mud-resistant polycarboxylic acid with high performance and a preparation method of the polycarboxylic acid. The polycarboxylic acid is prepared from components in parts by mass as follows: 300-350 parts of a macromonomer, 45-60 parts of an agent A, 4.0-4.5 parts of an agent B, 3.5-7.0 parts of an agent C and 500-550 parts of deionized water. The polycarboxylic acid has high water reducing rate and good slump loss resistance and is energy-saving, environmentally friendly, green and pollution-free.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a high-performance collapse-preserving and mud-resistant polycarboxylic acid and a preparation method thereof. Background technique [0002] With the vigorous development of my country's infrastructure construction, the performance of concrete necessary for infrastructure construction is also constantly improving, and at the same time, the requirements for concrete slump inhibitors are also getting higher and higher. Polycarboxylate-based slump-retaining agent is the third generation of high-performance slump-retaining agent, which has the characteristics of low dosage, high water reducing rate, small slump loss, and good adaptability to cement. Polycarboxylate slump retaining agent can greatly increase the amount of mixed materials such as fly ash and mineral powder. It is green and environmentally friendly, can greatly save cement, and has the advantages of high-stre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/28C08F220/06C08F220/34C04B24/26
Inventor 王亚军卢祎
Owner JIANGSU BAIRUIJI NEW MATERIAL
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