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Anti-carbonization maintenance film and method for cast-in-situ concrete vertical face

A concrete and curing film technology, applied in chemical instruments and methods, non-polymer organic compound adhesives, layered products, etc., can solve problems such as water absorption capacity decline, curing failure, adhesive loss of rewetting function, etc. Achieve the effects of preventing concrete carbonation, ensuring normal growth, and improving the quality of maintenance

Inactive Publication Date: 2014-08-20
湖南圣华节水科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] 1. If the acrylic monomer is used as the main bonding component, peroxide is added as an auxiliary agent, and other auxiliary raw materials are added at the same time, the synthesized adhesive has a strong adhesive force at one time. , the bonding strength between the base film and the mask is good; but during the maintenance and construction of the curing film, the adhesive loses its rewetting function, resulting in a significant decrease in the water absorption capacity of the polymer water-absorbing material sandwiched between the base film and the mask; serious Affect the quality of concrete curing, and even lead to curing failure
[0014] 2. For example, stamp adhesives based on polyvinyl alcohol and modified starch have the function of rewetting, but their adhesive force is too small in the rewetting state to effectively bond the base film and mask. After the molecular water-absorbing material absorbs water and the weight increases, the bottom film and the mask slip off, resulting in the failure of the concrete facade maintenance

Method used

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  • Anti-carbonization maintenance film and method for cast-in-situ concrete vertical face

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Take 5 kilograms of polyvinyl formal, 10 kilograms of modified rosin, 1 kilogram of industrial grade corn starch with acidity of 16, 20 kilograms of acrylic acid, 30 kilograms of 99% acrylamide, and 34 kilograms of water to mix and heat to 90~ Stir at 95°C evenly to obtain an adhesive that meets the requirements. The mass percentage of each component in this example is shown in Table 1:

[0041] Table 1

[0042] Ingredients

Weight (kg)

Polyvinyl formal

5

Modified rosin

10

corn starch

1

Acrylic

20

Acrylamide

30

[0043] The adhesive prepared in this embodiment is applied to the base film or face mask at 100 g / m2, and methyl methacrylate and acrylic acid are mixed in a mass ratio of 2:1 between the base film and the face mask. Super absorbent polymer material, compact and dry the base film and the face mask to prepare the concrete facade curing film.

[0044] During the curing construction of the pier concrete facade curing film, first water the pie...

Embodiment 2

[0046] Take 15 kilograms of polyvinyl formal, 20 kilograms of modified rosin, 1 kilogram of industrial first-grade corn starch with acidity of 17, 20 kilograms of acrylic acid, 30 kilograms of 98.8% acrylamide, and 14 kilograms of water to mix, and heat to 90~ Stir at 95°C evenly to obtain an adhesive that meets the requirements. The mass percentage of each component in this embodiment is shown in Table 2:

[0047] Table 2

[0048] Ingredients

Weight (kg)

Polyvinyl formal

15

Modified rosin

20

corn starch

1

Acrylic

20

Acrylamide

30

[0049] Apply the adhesive prepared in this embodiment to the base film or face mask at a rate of 2500 g / m2, sandwich the base film and the face mask with starch as a super absorbent polymer material, and compact the base film and the face mask. After drying, the concrete facade curing film is prepared.

[0050] During the curing construction of the concrete facade curing film, the concrete surface is watered once, and then th...

Embodiment 3

[0052] Take 10 kilograms of polyvinyl formal, 10 kilograms of modified rosin, 2.5 kilograms of industrial grade corn starch with an acidity of 17.2, 20 kilograms of acrylic acid, 30 kilograms of acrylamide with a content of 99.5%, and 27.5 kilograms of water to mix, and heat to 90~ Stir at 95°C evenly to obtain an adhesive that meets the requirements. The mass percentage of each component in this example is shown in Table 3:

[0053] table 3

[0054] Ingredients

Weight (%)

Polyvinyl formal

10

Modified rosin

10

corn starch

2.5

Acrylic

20

Acrylamide

30

[0055] The adhesive prepared in this embodiment was applied to the base film or face mask at 5000 g / m2, and a mixture of polyacrylamide and polyacrylic acid prepared at a mass ratio of 0.5:1 was sandwiched between the base film and the face mask as the super Strong water-absorbing polymer material, compact and dry the base film and the face mask, and then prepare the concrete facade curing film.

[0056] D...

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Abstract

The invention discloses an anti-carbonization maintenance film for a cast-in-situ concrete vertical face. The anti-carbonization maintenance film comprises a bottom film, a surface film, a macromolecule water absorption material and an adhesive, wherein micro holes are formed in the bottom film; the macromolecule water absorption material is clamped between the bottom film and the surface film and is adhered by the adhesive coated on the opposite faces of the bottom film or the surface film. An anti-carbonization maintenance method for the cast-in-situ concrete vertical face comprises the following steps of: after the cast-in-situ concrete vertical face is preliminarily condensed, spraying water, then adhering the anti-carbonization maintenance film to the cast-in-situ concrete vertical face, sticking all interfaces by adhesive tapes to realize sealing, and maintaining for 14 to 18 days. The adhesive has a rehumidification function and is proper in adhering force, so that the maintenance film is reliably combined with the cast-in-situ concrete vertical face, and a proper humidity and temperature environment is formed between the cast-in-situ concrete vertical face and the maintenance film; therefore, the concrete maintenance quality is improved, and concrete can be effectively prevented from being carbonized; and the anti-carbonization maintenance film is suitable for large-scale application on engineering.

Description

Technical field: [0001] The invention discloses an anti-carbonation curing film for cast-in-place concrete facades and a curing method, belonging to the technical field of cast-in-place concrete curing. Background technique: [0002] After concrete is poured, the reason why it can gradually set and harden is mainly due to the result of cement hydration, and hydration requires proper temperature and humidity conditions. Therefore, in order to ensure that the concrete has suitable hardening conditions and its strength continues to increase, The concrete must be cured. After the concrete is poured, if the climate is hot, the air is dry, and the curing is not carried out in time, the moisture in the concrete will evaporate too fast, forming a dehydration phenomenon, which will make the cement particles that have formed gels not fully hydrated and cannot be converted into stable crystals. Lack of sufficient cohesive force, resulting in flaky or powdery shedding on the surface of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04G21/02B32B27/06C09J4/02
Inventor 刘晓剑唐冬汉罗建阳
Owner 湖南圣华节水科技股份有限公司