High-efficient curing agent for preventing cracking of concrete, as well as preparation method and application thereof

A concrete and curing agent technology, applied in the field of preparation of concrete curing agents with anti-cracking function, can solve the problems of large amount of anti-cracking curing agent, low crack resistance performance, high production cost, etc., achieve convenient construction, simple preparation process, reduce cracking effect

Active Publication Date: 2016-12-07
CCCC FOURTH HARBOR ENG INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The primary purpose of the present invention is to provide an environment-friendly, low dosage, high water retention and crack resistance in order to overcome the disadvantages of large amount of concrete anti-crack curing agent in the prior art, poor water retention, low crack resistance and high production cost. Preparation method of strong and efficient concrete anti-crack curing agent

Method used

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  • High-efficient curing agent for preventing cracking of concrete, as well as preparation method and application thereof
  • High-efficient curing agent for preventing cracking of concrete, as well as preparation method and application thereof
  • High-efficient curing agent for preventing cracking of concrete, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A high-efficiency concrete anti-crack curing agent is prepared by the following method:

[0021] Add 350g of water, 4.2g of sodium hypophosphite as a chain transfer agent, 100g of triethylene glycol monobutyl ether acrylate, and 15g of HPEG into a four-neck flask with a stirrer, raise the temperature to 80°C, keep the temperature for half an hour, and slowly drop Add 5g of ammonium persulfate as an initiator, and a mixed solution of 36g of acrylic acid, 50g of methyl methacrylate and 25g of allyl glycidyl ether. After the dropwise addition is completed, continue the constant temperature reaction for 2.5h, cool to room temperature, and wash with sodium hydroxide The solution is neutralized until the pH value is 7-8, and the polycarboxylic acid copolymer with shrinkage reduction function is prepared. Add 500g of shrinkage-reducing polycarboxylate copolymer, 20g of lauryl alcohol ester, 200g of pure acrylic emulsion, 1.5g of hydroxymethyl cellulose, and 300g of water into ...

Embodiment 2

[0031] A high-efficiency concrete anti-crack curing agent is prepared by the following method:

[0032] Add 350g of water, 4.2g of sodium hypophosphite, 250g of triethylene glycol monobutyl ether acrylate, and 20g of HPEG into a four-neck flask with a stirrer, raise the temperature to 70°C, keep the temperature for half an hour, and slowly add ammonium persulfate dropwise 8g, and a mixed solution of 36g of acrylic acid, 25g of methyl methacrylate and 20g of allyl glycidyl ether. After the dropwise addition, continue the constant temperature reaction for 2.5h, cool to room temperature, and neutralize it to the pH value with sodium hydroxide solution 7-8, a polycarboxylic acid copolymer with shrinkage function is prepared. Add 500g of polycarboxylate copolymer with shrinkage-reducing function, 10g of lauryl alcohol ester, 200g of pure acrylic emulsion, 1g of hydroxymethyl cellulose, and 279.5g of water into the mixer, and stir evenly to prepare high-efficiency concrete anti-crac...

Embodiment 3

[0041] A high-efficiency polymer ceramic water reducer is prepared by the following methods:

[0042] Add 350g of water, 6g of sodium hypophosphite, 100g of triethylene glycol monobutyl ether acrylate, and 17g of HPEG into a four-neck flask with a stirrer, raise the temperature to 75°C, and after holding the temperature for half an hour, slowly add 15g of ammonium persulfate dropwise , and a mixed solution of 36g of acrylic acid, 60g of methyl methacrylate and 30g of allyl glycidyl ether. After the dropwise addition, continue the constant temperature reaction for 2.5h, cool to room temperature, and neutralize it with sodium hydroxide solution until the pH value is 7~8, prepare the polycarboxylic acid copolymer with reducing function. Add 400g of shrinkage-reducing polycarboxylate copolymer, 20g of lauryl alcohol ester, 250g of pure acrylic emulsion, 2g of hydroxymethyl cellulose, and 300g of water into the mixer, and stir evenly to prepare high-efficiency concrete anti-crack c...

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Abstract

The invention discloses a high-efficient curing agent for preventing cracking of concrete. The curing agent is prepared by uniformly mixing a polycarboxylic acid copolymer with reduction function, lauryl alcohol ester, a pure acrylic emulsion, hydroxymethyl cellulose, and water; the polycarboxylic acid copolymer with the reduction function is prepared by a copolymerization reaction between triethylene glycol momobutyl ether acrylic acid ester, HPEG, acrylic acid, methyl methacrylate and allyl glycidyl ether which are used as monomers, and an inorganic chain transferring agent and inorganic peroxide which are used as initiators. The high-efficient curing agent for preventing cracking of concrete can be used for solving volatilization of moisture on the surface of concrete completely, and a preparation process of the agent has the advantages of simplicity, and low energy consumption without pollution to environment. In the curing of the concrete, operation is simple, construction is convenient, volatilization of moisture on the surface of concrete is obviously reduced, cracking of concrete is reduced, and strength of concrete is enhanced.

Description

technical field [0001] The invention belongs to the field of curing agents for concrete, and in particular relates to a preparation method and application of a concrete curing agent with anti-cracking function. Background technique [0002] With the rapid development of economic construction, concrete materials are widely used in the construction of ports, wharves, bridges, roads, etc. The maintenance of concrete is an important part of controlling the quality of projects, which will not only affect the appearance quality of concrete, but also affect the quality of concrete. impact on durability. With the improvement of concrete quality requirements, it is necessary to reduce or eliminate the shrinkage of concrete, and reduce the harm to concrete structures caused by the shrinkage of concrete. At present, concrete maintenance is mainly based on surface water spraying and film coating. This conventional concrete maintenance method is time-consuming and laborious, and has hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B111/34
CPCC04B40/0039C04B2111/343C04B24/24C04B24/06C04B24/383C04B22/002
Inventor 张磊王胜年熊建波范志宏曾俊杰唐诗陈晓雨
Owner CCCC FOURTH HARBOR ENG INST
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