High-solid-content light-cured concrete protective coating and preparation method thereof

Abstract

The invention discloses a high-solid-content light-cured concrete protective coating which comprises the following components in parts by weight: 20-30 parts of light-cured resin, 60-80 parts of inorganic solid powder and 0.5-1 part of a dispersing agent, and provides a preparation method of the concrete protective coating based on the coating. The coating belongs to an organic-inorganic composite coating, can solve the problem of interface compatibility between the coating and concrete, improves the durability of the protective coating, and effectively improves the mechanical properties of the concrete.

Description

Technical Field

[0001] The invention relates to the field of concrete surface protective coatings, and in particular to a high-solid-content light-cured concrete protective coating and a preparation method thereof. Background Art

[0002] As one of the most common materials in modern construction, concrete is porous in microstructure and has poor permeability and corrosion resistance. The rapid deterioration of its structure is a problem that needs to be solved urgently. Because of its wide use and high repair cost, protective measures are usually taken on the surface of concrete. There are many materials and methods for concrete protection. Surface protective coating is an important method to protect concrete structure and improve the durability of concrete. Concrete protective coatings are mainly divided into two types: organic coatings and inorganic coatings. Organic coatings are the most widely used at present, but there is interface compatibility between organic coatings and concrete surfaces, and organic coatings have aging problems. Therefore, adding some materials with good interface compatibility with concrete materials to organic coatings can increase the durability of concrete protective coatings, thereby improving the service performance of concrete materials. Summary of the invention

[0003] In view of the problems existing in the prior art, the object of the present invention is to provide a high-solid light-cured concrete protective coating and a preparation method thereof, which can improve the mechanical properties and durability of concrete materials.

[0004] To solve the above problems, the present invention adopts the following technical solutions.

[0005] A high-solid light-curing concrete protective coating comprises the following components in parts by weight: 20 to 30 parts of light-curing resin, 60 to 80 parts of inorganic solid powder and 0.5 to 1 part of dispersant.

[0006] The photocurable resin is one of epoxy acrylate, polyurethane acrylate, polyester acrylate, amino acrylate and photo-imaging alkali-soluble resin.

[0007] The inorganic solid powder is one or more of ordinary silicate cement, sulphoaluminate cement, mineral powder, silica ash and fly ash.

[0008] The dispersant is an inorganic dispersant such as water glass, sodium tripolyphosphate, sodium hexametaphosphate and sodium pyrophosphate, and one or more of triethylhexyl phosphate, sodium lauryl sulfate, methyl amyl alcohol, cellulose derivatives, polyacrylamide, guar gum and fatty acid polyethylene glycol ester.

[0009] A method for preparing a high-solid light-curing concrete protective coating comprises the following steps:

[0010] The photocurable resin, solid powder and its dispersant need to be mixed evenly using a magnetic stirrer for 0.5 to 1 hour, and the stirring must also be carried out in a light-proof environment.

[0011] The cast concrete test block is placed in the high-solid light-curing coating prepared according to the above steps for pre-impregnation, and after the impregnation is completed, it is taken out and irradiated with ultraviolet light to cure the coating into a film.

[0012] The prepared high-solid light-curing coating needs to be placed in a light-proof container, and the pre-impregnation time of the concrete test block is 20 to 40 minutes.

[0013] The UV irradiation time is 5 to 20 seconds, and the distance between the UV lamp and the surface of the test block is 5 to 25 cm.

[0014] Beneficial Effects of the Invention

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] The invention belongs to an organic-inorganic composite coating, which can solve the compatibility problem between the coating and the concrete interface, improve the durability of the protective coating, and effectively enhance the mechanical properties of the concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the preparation process of the present invention. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0019] See also Figure 1 , Example 1:

[0020] 1) Preparation of high-solid light-curing coating: polyurethane acrylate was used as the main raw material, the inorganic solid powder was ordinary Portland cement (OPC), the ratio of the two components was 1:3, the dispersant was nano-silicon dioxide, the addition amount was 1%, and the mixture was mixed in a light-proof container and stirred for 0.5 h.

[0021] 2) After the coating is prepared, the pre-cast concrete test block is placed in it and immersed for 20 minutes.

[0022] 3) After the immersion is completed, take it out and use ultraviolet light to cure the coating. The irradiation time is 5 seconds. The distance between the ultraviolet lamp and the surface of the test block is 5 cm.

[0023] 4) Finally, the compressive strength of the test block was tested and compared with the blank group.

[0024] Example 2

[0025] 1) Preparation of high-solid light-curing coating: polyurethane acrylate was used as the main raw material, the inorganic solid powder was sulphoaluminate cement (SAC), the ratio of the two components was 2:3, the dispersant was nano-silicon dioxide, the addition amount was 1%, and the mixture was mixed in a light-proof container and stirred for 0.5 h.

[0026] 2) After the coating is prepared, the pre-cast concrete test block is placed in it and immersed for 20 minutes.

[0027] 3) After the immersion is completed, take it out and use ultraviolet light to cure the coating. The irradiation time is 5 seconds. The distance between the ultraviolet lamp and the surface of the test block is 5 cm.

[0028] 4) Finally, the compressive strength of the test block was tested and compared with the blank group.

[0029] Example 3

[0030] 1) Preparation of high-solid light-curing coating: polyester acrylic resin was used as the main raw material, the inorganic solid powder was ordinary Portland cement (OPC), the ratio of the two components was 1:3, the dispersant was nano-silicon dioxide, the addition amount was 1%, and the mixture was mixed in a light-proof container and stirred for 1 hour.

[0031] 2) After the coating is prepared, the pre-cast concrete test block is placed in it and immersed for 30 minutes.

[0032] 3) After the immersion is completed, take it out and use ultraviolet light to cure the coating. The irradiation time is 10 seconds. The distance between the ultraviolet lamp and the surface of the test block is 15 cm.

[0033] 4) Finally, the compressive strength of the test block was tested and compared with the blank group.

[0034] Example 4

[0035] 1) Preparation of high solid content photocurable coating: polyester acrylic resin was used as the main raw material, mineral powder (SL) was the inorganic solid powder, the ratio of the two components was 1:4, nano-silicon dioxide was the dispersant, the addition amount was 1%, and the mixture was mixed in a light-proof container and stirred for 0.5 h.

[0036] 2) After the coating is prepared, the pre-cast concrete test block is placed in it and immersed for 25 minutes.

[0037] 3) After the immersion is completed, take it out and use ultraviolet light to cure the coating. The irradiation time is 15 seconds. The distance between the ultraviolet lamp and the surface of the test block is 25 cm.

[0038] 4) Finally, the compressive strength of the test block is tested and compared with the blank group. The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field within the technical scope disclosed by the present invention, according to the technical solution and its improved concept of the present invention, shall be covered within the protection scope of the present invention.

Claims

1. A high-solid light-curing concrete protective coating, characterized in that: The invention comprises the following components in parts by weight: 20 to 30 parts of light-curing resin, 60 to 80 parts of inorganic solid powder and 0.5 to 1 part of dispersant.

2. A high-solid light-curing concrete protective coating and a preparation method thereof according to claim 1, characterized in that: The photocurable resin is one of epoxy acrylate, polyurethane acrylate, polyester acrylate, amino acrylate and photo-imaging alkali-soluble resin.

3. The high-solid light-curing concrete protective coating and preparation method thereof according to claim 1, characterized in that: The inorganic solid powder is one or more of ordinary silicate cement, sulphoaluminate cement, mineral powder, silica ash and fly ash.

4. The high-solid light-curing concrete protective coating and preparation method thereof according to claim 1, characterized in that: The dispersant is an inorganic dispersant such as water glass, sodium tripolyphosphate, sodium hexametaphosphate and sodium pyrophosphate, and one or more of triethylhexyl phosphate, sodium lauryl sulfate, methyl amyl alcohol, cellulose derivatives, polyacrylamide, guar gum and fatty acid polyethylene glycol ester.

5. A method for preparing a high-solid light-cured concrete protective coating using any one of claims 1 to 4, characterized in that: The following steps are involved: The photocurable resin, solid powder and its dispersant need to be mixed evenly using a magnetic stirrer for 0.5 to 1 hour, and the stirring must also be carried out in a light-proof environment.

6. The method for preparing a high-solid light-curing concrete protective coating according to claim 5, characterized in that: The cast concrete test block is placed in the high-solid light-curing coating prepared according to the above steps for pre-impregnation, and after the impregnation is completed, it is taken out and irradiated with ultraviolet light to cure the coating into a film.

7. The method for preparing a high-solid light-curing concrete protective coating according to claim 6, characterized in that: The prepared high-solid light-curing coating needs to be placed in a light-proof container, and the pre-impregnation time of the concrete test block is 20 to 40 minutes.

8. The method for preparing a high-solid light-curing concrete protective coating according to claim 6, characterized in that: The UV irradiation time is 5 to 20 seconds, and the distance between the UV lamp and the surface of the test block is 5 to 25 cm.

Images