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Polycarboxylate superplasticizer with super high early strength and preparation method of polycarboxylate superplasticizer

A technology of early-strength polycarboxylic acid and strong polycarboxylic acid, which is applied in the field of polycarboxylate water reducing agent and its preparation, can solve the problems of difficulty in meeting the requirements of high-rise buildings, prolonging the setting time of concrete, affecting the performance of products, and improving the performance of the product. The effect of anti-corrosion function, shortened production cycle, and high early strength

Active Publication Date: 2016-01-27
YUEYANG ORIENTAL YUHONG WATERPROOF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN201310749324.0 discloses a super early strength water reducer and its processing method. The super early strength water reducer is synthesized from allyl polyethylene glycol, acrylic acid or methacrylic acid, acrylamide, etc. Yes, the allyl polyethylene glycol raw material used in this invention has insufficient activity, and will remain in a large amount in the synthesized polycarboxylate water reducer, resulting in low water reducing rate, and the residual allyl polyethylene glycol will Significantly prolong the setting time of concrete, which affects the performance of the product; at the same time, the 1d strength is still quite low, which is difficult to meet the needs of high-rise buildings

Method used

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  • Polycarboxylate superplasticizer with super high early strength and preparation method of polycarboxylate superplasticizer
  • Polycarboxylate superplasticizer with super high early strength and preparation method of polycarboxylate superplasticizer
  • Polycarboxylate superplasticizer with super high early strength and preparation method of polycarboxylate superplasticizer

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Experimental program
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Effect test

Embodiment 1

[0023] Embodiment 1: Preparation of super early strength polycarboxylate water reducer

[0024] In a three-neck flask equipped with a thermometer and agitator, add 140g of deionized water and 100g of polyetheramine macromonomer M, stir and heat up to dissolve, add 0.5g of ammonium persulfate at 50°C, then add 20g of monomeric acrylic acid, 5g Allylamine, 5g cisylbutene hydroxyethyl ester and 10g deionized water were mixed and stirred to form a uniform monomer aqueous solution, which was added dropwise into the flask through a peristaltic pump at a constant speed. After the completion, continue to keep the constant temperature for 3 hours, then lower the temperature to 30°C, add sodium hydroxide to neutralize to pH = 7.5, and obtain the super early strength polycarboxylate superplasticizer CZPC-1.

Embodiment 2

[0025] Embodiment 2: Preparation of super early strength polycarboxylate superplasticizer

[0026] In a three-necked flask equipped with a thermometer and a stirrer, add 130g of deionized water and 100g of polyetheramine macromonomer M, stir and heat up to dissolve, add 0.4g of potassium persulfate at 55°C, then add 30g of monomeric acrylic acid, 5g Allylamine, 6g of cisylbutene hydroxyethyl ester and 10g of deionized water were mixed and stirred to form a uniform monomer aqueous solution, which was added dropwise into the flask through a peristaltic pump at a constant speed. After the completion, continue to keep the constant temperature for 4 hours, then lower the temperature to 30°C, add sodium hydroxide to neutralize to pH = 7.5, and obtain the super early strength polycarboxylate superplasticizer CZPC-2.

Embodiment 3

[0027] Embodiment 3: Preparation of super early strength polycarboxylate water reducer

[0028] In a three-necked flask equipped with a thermometer and a stirrer, add 150g of deionized water and 100g of polyetheramine macromonomer M, stir and heat up to dissolve, add 0.5g of ammonium persulfate at 50°C, and then add 25g of monomeric acrylic acid, 4g Allylamine, 8g of cisylbutene hydroxyethyl ester and 10g of deionized water were mixed and stirred to form a uniform monomer aqueous solution, which was added dropwise into the flask through a peristaltic pump at a constant speed. After completion, continue to keep constant temperature for 3 hours, then lower the temperature to 30°C, add sodium hydroxide to neutralize to pH = 7.5, and obtain super early strength polycarboxylate superplasticizer CZPC-3.

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Abstract

The invention discloses a polycarboxylate superplasticizer with super high early strength and a preparation method of the polycarboxylate superplasticizer. The polycarboxylate superplasticizer is prepared as follows: amine polyoxyethylene ether, acrylic acid, maleic hydroxy acid ester and allyl amine are taken as monomers and added with an inorganic peroxide initiator for free radical copolymerization, main chains of molecules of the superplasticizer contain carboxylic acid groups, sulfonic acid groups and amino groups simultaneously, side chains adopt long-chain polyamine ether, and the ratio of polyoxyethylene ether to acrylic acid to water to maleic hydroxy acid ester to allyl amine to the inorganic peroxide initiator in parts by mass is 100:(20-30):(100-150):(2-10):(2-10):(0.1-0.5). The invention further provides the preparation method of the polycarboxylate superplasticizer. The polycarboxylate superplasticizer with super high early strength has the advantages of short setting time, high early strength, good adaptability, extremely low chlorine ion content and capability of improvement of the concrete durability; meanwhile, the production process is simple, low in cost, environment-friendly and pollution-free, and mass production can be realized.

Description

technical field [0001] The invention relates to a polycarboxylate water reducer and a preparation method thereof, in particular to a super early strength polycarboxylate water reducer and a preparation method thereof. Background technique [0002] With the demand for construction and development and the reduction of the residential area in the market, the height of the building is getting higher and higher. Therefore, the shrinkage, cracking and strength of the concrete must be strictly controlled during the use process, especially for prefabricated components including segmented pipe piles. Concrete members have proliferated, and the durability of concrete structures must be ensured. Therefore, it is of great significance to study super-early strength polycarboxylate superplasticizers that can improve the early strength of concrete and accelerate the turnover speed of formwork, which is suitable for precast concrete. [0003] At present, regardless of compounding or synthe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/32C04B24/26C08F283/06C08F220/06C08F220/28C08F226/02C04B103/30
Inventor 王虎群段文锋胡艳山杨晓峰熊卫锋
Owner YUEYANG ORIENTAL YUHONG WATERPROOF TECH
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