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Concrete water reducer and preparation method thereof

A concrete water-reducing agent and water-reducing agent technology are applied in the field of concrete additives, which can solve the problems of high cost, high material requirements, and difficulty in market promotion, and achieve the effects of low cost, small dosage and easy operation.

Active Publication Date: 2014-05-21
大连市铭源全科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its high material requirements and high cost, it is difficult to market

Method used

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  • Concrete water reducer and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The soybean oil of 100kg, the acrylic acid of 20kg, the methoxy polyethylene glycol of 1000 with a molecular weight of 150kg and the emulsifier of 0.5kg are added in the reactor successively, stirred and mixed, and heated, and the p-benzene of 0.1kg is added successively after mixing. Methanesulfonic acid, 0.1kg of concentrated sulfuric acid and 0.05kg of hydroquinone, and continue to heat to a temperature of 100 ° C, the esterification product is obtained after the reaction for 7 hours, and the moisture in the reaction process is removed by vacuuming during the reaction process. ; Reduce the temperature of the reactant in the reactor to 55 ° C, then add 10 times of the reactant weight in the reactor to dilute the reactant and keep the temperature constant; Add dropwise to the reactant by 0.1kg ammonium persulfate system. A solution with a concentration of 20 wt% was obtained, and the dropwise addition was completed within 3 h. After the dropping, the stirring was con...

Embodiment 2

[0024] The soybean oil of 100kg, the acrylic acid of 40kg, 300kg of methoxy polyethylene glycol with molecular weight of 800 and the emulsifier of 10kg are added in the reactor successively, stirred and mixed, and heated, and the p-benzoyl of 0.4kg is added successively after mixing. Sulfuric acid, 0.4kg of concentrated sulfuric acid and 0.2kg of hydroquinone, and continue to heat to a temperature of 120 ° C, the esterification product is obtained after the reaction for 10h, and the moisture in the reaction process is removed by vacuuming during the reaction process; Reduce the temperature of the reactant in the reactor to 65°C, then add 30 times of the reactant weight in the reactor to dilute the reactant and keep the temperature constant; then add dropwise to the reactant to be made by 0.4kg potassium persulfate The concentration of the solution is 30wt%, and the dropwise addition is completed within 5h. After the drop is completed, the stirring is continued for 2h. After ...

Embodiment 3

[0026] The soybean oil of 100kg, the acrylic acid of 30kg, the methoxy polyethylene glycol of 200kg with a molecular weight of 1200 and the emulsifier of 5kg were added in the reactor successively, stirred and mixed, and heated, and the p-benzoyl of 0.3kg was added successively after mixing. Sulfuric acid, 0.2kg of concentrated sulfuric acid and 0.1kg of hydroquinone, and continue to heat to a temperature of 110 ° C to obtain an esterified product after 8 hours of reaction, and remove the moisture in the reaction process by vacuuming during the reaction process; Reduce the temperature of the reactant in the reactor to 60°C, then add 20 times the weight of the reactant in the reactor to dilute the reactant and keep the temperature constant; then add dropwise to the reactant and be made of 0.2kg ammonium persulfate The concentration of the solution is 25wt%, and the dropwise addition is completed within 4h. After the drop is completed, the stirring is continued for 1.5h. After...

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Abstract

The invention discloses a concrete water reducer and a preparation method thereof. The water reducer is synthesized by using raw materials including vegetable oil, acrylic acid, methoxy polyethylene glycol, an initiator, p-toluene sulphonic acid, concentrated sulphuric acid, p-dihydroxybenzene and an emulsifying agent through esterification, wherein the synthesis method is mainly realized through the steps of stirring, mixing, controlling the temperature to carry out esterification reaction, regulating the pH value and the like. The preparation method is simple in process flow and easy to operate; meanwhile, the water reducer provided by the invention is small in mixing amount, high in water reducing rate, low in cost and environment-friendly.

Description

technical field [0001] The invention relates to a concrete additive, in particular to a concrete water reducer and a preparation method thereof. Background technique [0002] Water reducing agent refers to an admixture that can reduce the amount of mixing water and improve the strength of concrete under the condition that the workability of concrete and the amount of cement remain unchanged; After mixing, due to the action of the molecular gravitational force of the cement particles, the cement slurry forms a flocculation structure, so that 10% to 30% of the mixing water is wrapped in the cement particles and cannot participate in free flow and lubrication, thus affecting the concrete mixing. When the water-reducing agent is added, the water-reducing agent molecules can be adsorbed on the surface of the cement particles, so that the surface of the cement particles has the same charge (usually a negative charge), forming an electrostatic repulsion effect, which promotes the c...

Claims

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Application Information

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IPC IPC(8): C08F290/06C08F220/06C08F220/68C08G65/48C04B24/24C04B103/30
Inventor 宫振鑫
Owner 大连市铭源全科技开发有限公司
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