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Anti-mud type low-slump-loss polycarboxylic acid water reducing agent and preparation method thereof

A polycarboxylic acid-based, mud-resistant technology, applied in the field of concrete admixtures and their synthesis, can solve problems such as rapid slump loss, and achieve the effects of reducing alkali content, reducing slump, and improving early strength and durability

Active Publication Date: 2017-01-18
HEBEI SANKAISHENFA SCI & TECH CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of anti-mud superplasticizer can improve the fluidity of concrete with high mud content, but its slump loss is still relatively fast

Method used

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  • Anti-mud type low-slump-loss polycarboxylic acid water reducing agent and preparation method thereof
  • Anti-mud type low-slump-loss polycarboxylic acid water reducing agent and preparation method thereof

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preparation example Construction

[0034] The preparation method of the anti-mud type low-slump polycarboxylate water-reducer of the present invention may comprise the following steps:

[0035] 1) Mix and stir the deionized water, the adjusting catalyst and hydrogen peroxide with 1-2% of the total mass of the monomers evenly.

[0036] 2) Add liquid A, liquid B, liquid C and liquid D dropwise, and keep the reaction at the current temperature for 1.5 hours.

[0037]3) Under the condition of 30°C, the organic base diethanol monoisopropanolamine was added to adjust the pH value to 6.0.

[0038] Wherein, by weight, 365,000 parts of deionized water and 3,500 parts of the regulating catalyst.

[0039] Liquid A is an aqueous solution with a solid content of 70% composed of isopentenol polyoxyethylene ether macromonomer and acrylic acid. Wherein, by weight, the said prenol polyoxyethylene ether macromonomer is 550000 parts, and acrylic acid is 4.5-6.5% of said prenol polyoxyethylene ether macromonomer.

[0040] Liqui...

Embodiment 1

[0056] (1) Add 550g of macromonomer and 251.04g of deionized water into a 1000mL beaker, heat and stir to dissolve them, then add 35.75g of acrylic acid and stir evenly when the temperature is lowered to 30°C.

[0057] (2) Add 16.5g of sodium 2-allyloxyethanesulfonate, 20.63g of cis-1-propenylphosphonic acid and 44.7g of deionized water into a 250mL Erlenmeyer flask and mix well to form the dropwise solution B.

[0058] (3) Add 22g monoacryloyloxyethyl succinate, 35.75g methoxyethyl acrylate and 57.75g deionized to a 250mL Erlenmeyer flask and mix well to form the drop solution C.

[0059] (4) Add 1.7g of vitamin C, 3.4g of 3-mercaptopropionic acid and 96.9g of deionized water into a 250mL Erlenmeyer flask and mix well to form the dripping liquid D.

[0060] (5) Add 365g of deionized water, 3.5g of tartaric acid and 6.81g of hydrogen peroxide into a 2000mL four-neck flask and stir well. Add solution A, solution B, solution C and solution D dropwise with a peristaltic pump at ...

Embodiment 2

[0063] (1) Add 550g of macromonomer and 248.68g of deionized water into a 1000mL beaker, heat and stir to dissolve them, then add 30.25g of acrylic acid and stir evenly when the temperature is lowered to 30°C, and this is dropwise liquid A.

[0064] (2) Add 20.63g of sodium 2-allyloxyethanesulfonate, 16.5g of cis-1-propenylphosphonic acid and 41.94g of deionized water into a 250mL Erlenmeyer flask and mix well to form the dropwise solution B.

[0065] (3) Add 27.5g monoacryloyloxyethyl succinate, 31.63g methoxyethyl acrylate and 59.13g deionized to a 250mL Erlenmeyer flask and mix evenly to form dropwise solution C.

[0066] (4) Add 1.69g of vitamin C, 3.38g of 3-mercaptopropionic acid and 96.33g of deionized water into a 250mL Erlenmeyer flask and mix well to form the dropwise solution D.

[0067] (5) Add 365g of deionized water, 3.5g of tartaric acid and 10.15g of hydrogen peroxide into a 2000mL four-neck flask and stir well. Add solution A, solution B, solution C and solut...

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Abstract

The invention discloses an anti-mud type low-slump-loss polycarboxylic acid water reducing agent and a preparation method thereof, and relates to the technical field of synthesis of concrete admixtures. Specifically, from the effect of a molecular structure and an initial pH value of a reaction system on the performance of a product, during a synthesis process, tartaric acid is selected as an adjusting catalyst of the initial pH value of the reaction system in a kettle, monomers succinic acid monoethyl propionyl oxyethyl ester and 2-allyloxy sodium ethanesulfonate having a special water reducing function, monomers cis-1-propylene phosphonic acid and 2-allyloxy sodium ethanesulfonate having a special anti-mud function, and monomers methoxyethyl acrylate, succinic acid monoethyl propionyl oxyethyl ester and isopentenol polyoxyethylene ether with the molecular weight M of 1400 having a special slump retaining function are introduced; after the reaction is finished, an organic alkali diethanolisopropanolamine is used for neutralizing, and the anti-mud type low-slump-loss polycarboxylic acid water reducing agent is synthesized. The reducing agent has the advantages of low alkali content, fast early strength achieving of concrete, and high strength, can significantly improve the workability and the slump retention of the concrete prepared by high-mud-content aggregates, has relatively good anti-mud ability, and also has the advantages of low gradual loss of newly blended concrete, high strength of hardened concrete, good durability and the like.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures and their synthesis, in particular to a mud-resistant low-slump polycarboxylate water reducer and a preparation method thereof. Background technique [0002] As we all know, the "One Belt, One Road" strategy has become the central issue of my country's development. The "One Belt, One Road" strategy involves various industries, among which infrastructure construction is a priority development area, mainly covering high-speed railways, expressways, South-to-North Water Diversion, ports, hydropower dams, Airport, municipal construction, residential buildings and other engineering projects. Polycarboxylate high-performance water reducer has the advantages of good dispersibility, high water reducing rate, low dosage, strong slump retention, low shrinkage, no "three wastes" in the production process, and environmental protection. widespread attention of the people. In recent years, polycarb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F220/28C08F228/02C08F230/02C04B24/16C04B103/30
CPCC04B24/165C04B2103/302C08F283/06C08F220/281
Inventor 马国栋谢红靳通收王文彬骆志超陈占虎
Owner HEBEI SANKAISHENFA SCI & TECH CORP LTD
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