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A prefabricated concrete two-component surface enhancer and its application method

A surface enhancer and concrete surface technology, applied in the field of enhancer, can solve problems such as poor permeability, micro cracks, complex components, etc.

Active Publication Date: 2021-07-06
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic treatment agents have great advantages in improving waterproof performance. However, their physical and chemical properties are quite different from those of concrete substrates. Secondly, their own durability, especially UV resistance, is poor. In addition, organic solvents and some carcinogenic organic substances are likely to cause health problems. Environmental protection issues; inorganic treatment agents were used earlier, and their own durability and matrix fusion are better than organic ones. The disadvantage is that the permeability is poor. cracks and thus lose the protective performance; organic-inorganic composite products with inorganic components as the main components are relatively complex, and simple composite products can easily lead to the ineffective coordination of various active components. At the same time, there are few products for prefabricated concrete. Without the needs of engineering designers and users, it is difficult to meet the needs of practical applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Concrete surface enhancer: in parts by mass, the formula of component A is: 15 parts of tetrasodium edetate, 5 parts of sodium citrate, 0.6 part of triethanolamine, 2 parts of sodium gluconate, 5 parts of sodium glucoheptonate parts, 200 parts of water; the formula of component B is: 10 parts of nano-silica with a particle size of 20nm, 10 parts of polyacrylic acid modified nano-silica, 15 parts of polycarboxylic acid-modified nano-silica, and 260 parts of water .

[0025] Preparation of polyacrylic acid modified nano silica:

[0026] (1) Take 80 parts of acrylic acid, 2 parts of γ-mercaptopropyltrimethoxysilane and 2 parts of benzophenone into the reaction vessel, protect it with nitrogen, and stir at a constant temperature of 20°C;

[0027] (2) Keep stirring and irradiate with 365nm purple light for 10 minutes;

[0028] (3) dissolving the obtained product with tetrahydrofuran, centrifuging and precipitating, and vacuum drying at 40° C. to obtain silane-modified poly...

Embodiment 2

[0037] Concrete surface enhancer: in parts by mass, the formula of component A is: 25 parts of tetrasodium edetate, 8 parts of sodium citrate, 1 part of triethanolamine, 3 parts of sodium gluconate, 6 parts of sodium glucoheptonate parts, 450 parts of water; the formula of component B is: 15 parts of nano-silica with a particle size of 30nm, 15 parts of polyacrylic acid modified nano-silica, 10 parts of polycarboxylic acid-modified nano-silica, and 300 parts of water .

[0038] Preparation of polyacrylic acid modified nano silica:

[0039] (1) Take 50 parts of acrylic acid, 1 part of γ-mercaptopropyltrimethoxysilane and 1 part of benzophenone into the reaction vessel, protect it with nitrogen, and stir at a constant temperature of 30°C;

[0040] (2) Keep stirring and irradiate with 365nm purple light for 15 minutes;

[0041] (3) dissolving the obtained product with tetrahydrofuran, centrifuging and precipitating, and vacuum drying at 60° C. to obtain silane-modified polyacry...

Embodiment 3

[0050] Concrete surface enhancer: in parts by mass, the formula of component A is: 8 parts of tetrasodium edetate, 3 parts of sodium citrate, 3 parts of triethanolamine, 6 parts of sodium gluconate, 5 parts of sodium glucoheptonate 120 parts of water; the formula of component B is: 20 parts of nano-silica with a particle size of 10nm, 5 parts of polyacrylic acid-modified nano-silica, 30 parts of polycarboxylic acid-modified nano-silica, and 300 parts of water .

[0051] Preparation of polyacrylic acid modified nano silica:

[0052] (1) Take 100 parts of acrylic acid, 3 parts of γ-mercaptopropyltrimethoxysilane and 2 parts of benzophenone into the reaction vessel, protect it with nitrogen, and stir at a constant temperature of 30°C;

[0053] (2) Keep stirring and irradiate with 365nm purple light for 20 minutes;

[0054] (3) dissolving the obtained product with tetrahydrofuran, centrifuging and precipitating, and vacuum drying at 40° C. to obtain silane-modified polyacrylic a...

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Abstract

The invention discloses a prefabricated concrete two-component surface enhancer and a use method thereof. The surface enhancer includes component A and component B, and component A includes 5-25 parts of tetrasodium edetate, lemon 1-10 parts of sodium acid, 0.5-3 parts of triethanolamine, 1-10 parts of sodium gluconate, 1-10 parts of sodium glucoheptonate, 100-500 parts of water, and 5-20 parts of nano silicon dioxide in component B , 5-20 parts of polyacrylic acid modified nano-silica, 10-30 parts of polycarboxylic acid-modified nano-silica, and 100-300 parts of water. Treatment; (2) Brush or spray component A on the concrete surface for 3 to 5 times, with an interval of 15 to 30 minutes each time, and let it stand for 2 to 6 hours; (3) Brush or spray component B on the concrete surface Concrete surface of component A, and wet curing for 24 to 48 hours. The reactive components of the reinforcing agent can adapt to different pore characteristics and pore interface characteristics, effectively improve the surface performance of concrete, and prolong its service life. The components are water-soluble and environmentally friendly.

Description

technical field [0001] The present invention relates to a reinforcing agent and its application method, more specifically, to a prefabricated concrete two-component surface enhancer and its application method. Background technique [0002] The concrete structure with prefabricated components as the main force-bearing components is assembled or connected. Concrete components will be subjected to external forces when they are transported to the site and assembled or loaded on that site. At the same time, they will face complex and changeable external environments during service, which will affect the surface of the fabricated concrete components, reducing their surface strength. The pores become larger, reducing its service life. Surface treatment technology can improve the surface properties of concrete. The existing surface treatment agents can be divided into inorganic, organic, and inorganic-organic composites according to their main components. Organic treatment agents ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/12C04B20/02C04B14/06
CPCC04B14/062C04B20/023C04B40/0039C04B24/12C04B24/06C04B24/122C04B24/04
Inventor 顾越夏锴伦靳卫准蒋林华郭明志吕凯
Owner HOHAI UNIV
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