A kind of coagulation-promoting early-strength polycarboxylate superplasticizer and preparation method thereof

A superplasticizer, a technology of accelerating coagulation and early strength, used in concrete admixtures, the preparation of polycarboxylate superplasticizers, the preparation of coagulation-promoting early-strength polycarboxylate superplasticizers, and the preparation of coagulation-promoting early-strength type Polycarboxylate superplasticizer, the field of polycarboxylate superplasticizer, can solve the problems of shortening the setting time of concrete, high price of styrene sulfonic acid, and no guidance plan, saving steam curing energy consumption, shortening setting time, The effect of faster template turnaround

Active Publication Date: 2020-12-15
SHIJIAZHUANG CHANGAN YUCAI BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the price of styrene sulfonic acid is very high, and there is also a problem that it is difficult to popularize
US Patent5158996 discloses a method for synthesizing an amphoteric dispersant by using acetone as a solvent, but the use of a solvent will pollute the environment, and must be removed by distillation in subsequent use, increasing the cost
[0005] The above technologies have not given specific guidance on how to make polycarboxylate superplasticizers can effectively improve the early strength of concrete and shorten the setting time of concrete

Method used

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  • A kind of coagulation-promoting early-strength polycarboxylate superplasticizer and preparation method thereof
  • A kind of coagulation-promoting early-strength polycarboxylate superplasticizer and preparation method thereof
  • A kind of coagulation-promoting early-strength polycarboxylate superplasticizer and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: the coagulation-accelerating early-strength polycarboxylate superplasticizer of the present invention is made of the following raw materials in parts by mass: polyoxyethylene ether macromonomer is isopentenol polyoxyethylene ether (TPEG4000) 72 parts, reducing agent ferrous sulfate 0.009 part, aqueous initiator namely hydrogen peroxide (30% mass percent concentration, hydrogen peroxide 30%) 1.2 parts, deionized water 45 parts, A feed liquid, B feed liquid. The above-mentioned A material liquid is mixed by 8.6 parts of acrylic acid, 0.4 part of unsaturated alcohol amine ester, i.e. triethanolamine trimethacrylate, 0.5 part of unsaturated amide, i.e. acrylamide, and 20 parts of deionized water; It is prepared by mixing 0.09 part of L-ascorbic acid, 0.3 part of mercaptopropionic acid as a chain transfer agent, and 20 parts of deionized water.

[0020] The preparation method of described coagulation-accelerating early-strength polycarboxylate superplasticizer ...

Embodiment 2

[0021] Embodiment 2: The coagulation-accelerating early-strength polycarboxylate superplasticizer of the present invention is made of the following raw materials in parts by mass: polyoxyethylene ether macromonomer is isopentenol polyoxyethylene ether (TPEG4000) 76 parts, reducing agent ferrous sulfate 0.012 parts, aqueous initiator namely hydrogen peroxide (30%) 1.5 parts, deionized water 48 parts, A material liquid, B material liquid. The above-mentioned material solution A is mixed by 9 parts of acrylic acid, 1 part of triethanolamine trimethacrylate, 0.2 parts of methacrylamide, and 22 parts of deionized water; the material solution of B is made of 0.12 parts of reducing agent L-ascorbic acid, chain transfer The agent is 0.32 parts of mercaptopropionic acid and 25 parts of deionized water mixed.

[0022] The preparation method of described coagulation-accelerating early-strength polycarboxylate superplasticizer comprises the following process steps: 1. 76 parts of polyoxye...

Embodiment 3

[0023] Embodiment 3: the coagulation-accelerating early-strength polycarboxylate superplasticizer of the present invention is made of the following raw materials in parts by mass: polyoxyethylene ether macromonomer is isopentenol polyoxyethylene ether (TPEG6000) 72 parts, reducing agent ferrous sulfate 0.015 parts, aqueous initiator namely hydrogen peroxide (hydrogen peroxide 30%) 1.5 parts, deionized water 46 parts, A feed liquid, B feed liquid. The above-mentioned A feed liquid is mixed by 8 parts of acrylic acid, 1 part of triethanolamine maleate, 0.5 parts of acrylamide, and 21 parts of deionized water; the B feed liquid is made of 0.15 parts of reducing agent L-ascorbic acid, chain transfer agent It is prepared by mixing 0.32 parts of mercaptopropionic acid and 22 parts of deionized water.

[0024] The preparation method of described coagulation-accelerating early-strength polycarboxylate superplasticizer comprises the following process steps: 1. 72 parts of polyoxyethyle...

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Abstract

The invention discloses a coagulating and early-strength-type polycarboxylic acid superplasticizer and a preparing method thereof. The polycarboxylic acid superplasticizer is prepared from, by mass, 70-80 parts of polyoxyethylene ether macromonomer, 1-1.5 parts of reducing agent, 1-1.5 parts of water-based initiator, 40-50 parts of deionized water, feed liquid A and feed liquid B; the feed liquidA is prepared by mixing 7-9 parts of acrylic acid, 0.1-2 parts of coagulating and early-strength monomer, namely unsaturated alhylol amine ester, 0.1-1 part of unsaturated amide and 15-25 parts of deionized water; the feed liquid B is prepared by mixing 0.08-0.15 part of reducing agent Y, 0.3-0.5 part of chain transfer agent and 18-28 parts of deionized water. The preparing method comprises the steps of putting the polyoxyethylene ether macromonomer, the reducing agent and the deionized water into a reaction kettle, raising the temperature, and stirring the materials; adding the water-based initiator into the reaction kettle, dropwsie adding the feed liquid A and the feed liquid B, after dropwise addition is finished, conducting heat preservation for a reaction, cooling to the room temperature, and adding caustic soda liquid to adjust the pH value to 7. By means of the coagulating and early-strength-type polycarboxylic acid superplasticizer and the preparing method thereof, the early strength of concrete is effectively improved, and the coagulating time of the concrete is shortened.

Description

technical field [0001] The invention relates to a concrete admixture, in particular to a polycarboxylate superplasticizer, in particular to a coagulation-accelerating early-strength polycarboxylate superplasticizer, which belongs to the technical field of building materials. The invention also relates to a preparation method of a polycarboxylate superplasticizer, in particular to a preparation method of a coagulation-accelerating early-strength polycarboxylate superplasticizer. Background technique [0002] Prefabricated components have gradually been widely used in the market due to their fast construction speed, saving manpower, improving the construction site environment, and good economic benefits. Rapid formwork turnover is often required in precast element production, which often requires high early strength concrete. The usual method is: increase the amount of cement, mix with early strength inorganic salts, and increase the steam curing temperature. Increasing the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F220/06C08F222/22C08F220/56C08F4/40C04B24/26
CPCC04B24/2694C08F4/40C08F283/065C08F220/06
Inventor 吴伟刘昭洋王进春董树强刘旭飞刘欢刘翠芬康静
Owner SHIJIAZHUANG CHANGAN YUCAI BUILDING MATERIALS
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