Nano anti-carbonization concrete coating structure capable of being subjected to spraying construction

Abstract

The utility model relates to the technical field of concrete, and discloses a nano anti-carbonization concrete coating structure capable of being sprayed for construction, which comprises a nano substrate coating sealant bottom layer, a nano hyperbranched permeable acrylic coating layer and a hydrophobic anti-silicon carbide resin coating surface layer which are sequentially adhered above the surface of a concrete floor. According to the utility model, flexibility and low temperature resistance are realized, further expansion of micro-cracks can be sealed, new cracks caused by expansion and contraction of a concrete matrix can be resisted, water can be prevented from entering the concrete, and the surface layer has good hydrophobicity, so that the structure can be prevented from being eroded by rainwater; chloride ions and acid, alkali and salt substances are effectively prevented from permeating into the concrete, and steel bar corrosion is prevented. The bonding strength among all layers in the concrete is improved, and the phenomena of stripping, falling and the like are not easy to occur.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete, in particular to a nano anti-carbonation concrete coating structure that can be spray-constructed. Background Technique

[0002] The nano-silicone resin anti-carbonation concrete that can be spray-constructed has super-hydrophobicity, resists atmospheric erosion, resists ultraviolet irradiation, has a service life of more than 10 years, and extends the maintenance period; it has excellent flexibility and low-temperature resistance, can not only seal the further expansion of micro-cracks, but also resist the generation of new cracks caused by the expansion and contraction of the concrete matrix, and prevent water from entering the interior of the concrete; the good hydrophobicity of the surface layer prevents the erosion of the structure by external rainwater, effectively prevents chloride ions and acid, alkali, and salt substances from penetrating into the interior of the concrete, and prevents the corrosion of steel bars. Multiple schemes can be designed according to different use requirements, such as the surface protection of concrete products, the maintenance of old concrete, and anti-corrosion concrete products designed according to the use properties, etc., which can be applied to the anti-carbonation, anti-seepage, waterproofing, and anti-corrosion of various building exterior walls, repairing and covering concrete defects or micro-cracks, and are suitable for application to reinforced concrete structures such as water conservancy and hydropower, ports, tunnels, bridges, and other industrial and civil buildings, improving the service life of the structure.

[0003] Currently, on the market, silicon monomers and silane-modified concrete coatings are mainly used. Due to their many excellent properties, they have been widely used in large quantities. However, this type of coating also has many disadvantages: 1. The hydrophobic cycle is short. Generally, the hydrophobic cycle of silicon monomers is 3 - 6 months, and that of silane is less than 3 years. This type of monomer is easy to overflow and weaken; 2. The bonding strength is low, and it is easy to peel off and fall off during use; 3. The ultraviolet resistance is average, the bonding strength of the concrete decreases, and it is easy to powder; 4. The chemical resistance is poor, and the concrete surface mildews and corrodes, resulting in peeling and falling off.

[0004] Therefore, we propose a nano anti-carbonation concrete coating structure that can be spray-constructed. Content of the Utility Model

[0005] The utility model aims to solve the technical problems existing in the above-mentioned prior art, and provides a nano anti-carbonation concrete coating structure that can be spray-constructed.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme. A nano anti-carbonation concrete coating structure that can be spray-constructed includes a nano primer sealant bottom layer, a nano hyperbranched permeable acrylic coating layer, and a hydrophobic anti-carbonation silicone resin coating surface layer that are sequentially arranged above the surface of the concrete floor.

[0007] Wherein:

[0008] The nano primer sealant bottom layer is adhesively connected to the concrete surface. Through the penetration of the nano-scale small molecule resin of the nano primer sealant, it combines and interweaves with the concrete in depth to form a three-dimensional networked dense structure;

[0009] The nano hyperbranched permeable acrylic coating layer is adhesively connected to the nano primer sealant bottom layer;

[0010] The hydrophobic anti-carbonization silicon resin coating surface layer is adhesively connected to the nano hyperbranched permeable acrylic coating layer; the hydrophobic anti-carbonization silicon resin coating surface layer is composed of a blend of a silicone resin modified polymer emulsion, a color paste, and titanium dioxide;

[0011] Preferably, the thickness of the nano primer sealant bottom layer is 0.5 to 2.5 mm;

[0012] Preferably, the thickness of the nano hyperbranched permeable acrylic coating layer is 0.8 to 1.2 mm;

[0013] Preferably, the thickness of the hydrophobic anti-carbonization silicon resin coating surface layer is 40 to 60 μm.

[0014] The present utility model provides a sprayable nano anti-carbonization concrete coating structure. It has the following beneficial effects:

[0015] This sprayable nano anti-carbonization concrete coating structure, through a three-layer structure, makes the concrete more hydrophobic and waterproof, resists atmospheric erosion, resists ultraviolet radiation, has a service life of more than 10 years, and extends the maintenance period; it has flexibility and low-temperature resistance, can seal the further expansion of micro cracks, resist the generation of new cracks caused by the expansion and contraction of the concrete matrix, and prevent water from entering the concrete interior; the good hydrophobicity of the surface layer prevents rainwater from eroding the structure, effectively prevents chloride ions and acid, alkali, and salt substances from penetrating into the concrete interior, and prevents steel bar corrosion. It improves the bonding strength between the layers in the concrete and is not prone to phenomena such as peeling and falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the sprayable nano anti-carbonization concrete structure of the present utility model.

[0017] Legend:

[0018] 1, concrete floor; 2, nano primer sealant bottom layer; 3, nano hyperbranched permeable acrylic coating layer; 4, hydrophobic anti-carbonization silicon resin coating surface layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] A nano anti-carbonation concrete coating structure that can be spray-applied for construction, as Figure 1 shown, includes a concrete floor 1. A nano primer sealant bottom layer 2 is laid on the top of the concrete floor 1. A nano hyperbranched permeable acrylic coating layer 3 is laid on the top of the nano primer sealant bottom layer 2. A hydrophobic anti-carbonation silicon resin coating surface layer 4 is laid on the top of the nano hyperbranched permeable acrylic coating layer 3. The nano primer sealant bottom layer 2 forms the bottom layer, the nano hyperbranched permeable acrylic coating layer 3 forms the middle layer, and the top layer is formed by the hydrophobic anti-carbonation silicon resin coating surface layer 4. The three-layer laminated structure is composed of the nano primer sealant bottom layer 2, the nano hyperbranched permeable acrylic coating layer 3, and the hydrophobic anti-carbonation silicon resin coating surface layer 4; the nano primer sealant bottom layer 2 is adhesively connected to the concrete floor 1, the nano hyperbranched permeable acrylic coating layer 3 is adhesively connected to the nano primer sealant bottom layer 2, and the hydrophobic anti-carbonation silicon resin coating surface layer 4 is adhesively connected to the nano hyperbranched permeable acrylic coating layer 3.

[0021] In this application, the nano primer sealant bottom layer 2 forms a good adhesive connection with the concrete floor 1 and forms a penetration (rooting) effect; the nano hyperbranched permeable acrylic coating layer 3 has an elastic waterproof effect with the nano primer sealant bottom layer 2; the hydrophobic anti-carbonation silicon resin coating surface layer 4 can form a variety of different colors and is composed of a silicone resin-modified polymer emulsion, color paste, and titanium dioxide; the hydrophobic anti-carbonation silicon resin coating surface layer 4 has good hydrophobicity and water resistance, is resistant to ultraviolet rays, alkali, and corrosion, etc., and provides good protection for the underlying nano primer sealant bottom layer 2 and the intermediate nano hyperbranched permeable acrylic coating layer 3.

[0022] The underlying layer 2 of the nano primer sealant for substrates is composed of nano primer sealant RY-4010. Through the penetration of nano-scale small molecule resins, it combines and interweaves with the concrete in depth to form a three-dimensional networked dense structure, improving the bonding strength of the concrete. The nano hyperbranched permeable acrylic coating layer 3 is composed of hyperbranched permeable acrylic primer RY-4011. Both the nano hyperbranched permeable acrylic coating layer 3 and the underlying layer 2 of the nano primer sealant for substrates are elastic systems, improving the elastic strength of the underlying layer 2 of the nano primer sealant for substrates and the nano hyperbranched permeable acrylic coating layer 3. The tensile strength of the coating film is 1.3 MPa, and the elongation at break is 400%. It is in the same system as the nano primer sealant for substrates, and the bonding strength is greater than 1.3 MPa. The hydrophobic anti-carbonization silicon resin coating surface layer 4 has a good hydrophobic effect under the influence of the lotus effect, preventing water erosion. Thus, the floor is made more hydrophobic and waterproof, resistant to atmospheric erosion, ultraviolet radiation, and has an extended service life. The hydrophobic anti-carbonization silicon resin coating surface layer 4 uses Runyu brand hydrophobic silicon resin anti-carbonization topcoat RY-4012, which has flexibility and low-temperature resistance. It can seal the further expansion of microcracks, resist the generation of new cracks caused by the expansion and contraction of the concrete matrix, and prevent water from entering the interior of the concrete. The good hydrophobicity of the surface layer prevents rainwater from eroding the structure, effectively prevents chloride ions and acid, alkali, and salt substances from penetrating into the interior of the concrete, and prevents steel corrosion. It improves the bonding strength between the layers in the concrete and is not prone to phenomena such as peeling and falling off.

[0023] On the dry and clean concrete floor 1 substrate, a nano primer sealant underlying layer 2 composed of nano primer sealant RY-4010 is brush-coated to form such a bonding strength adjustment layer inside the concrete floor 1. The thickness of the bonding strength adjustment layer is 0.5 - 2.5 mm, and the average thickness is about 2 mm. One day later, the nano hyperbranched permeable acrylic coating layer 3 composed of hyperbranched permeable acrylic primer RY-4011 is brush-coated three times at intervals of 4 - 8 hours. The dry film thickness formed is about 1 mm. One day later, two coats of hydrophobic silicon resin anti-carbonization topcoat RY-4012 are brush-coated on the outside at an interval of 4 hours. The dry film thickness formed is about 60 μm.

[0024] The crack bridging ability of the coating thus obtained is about 5 - 8 mm (the tensile speed is 2 mm / min, the initial crack width of the substrate is 0, the same hereinafter). If the bond strength adjustment treatment is not carried out and only the substrate is coated with the polymer modified cement coating (i.e., the elastic waterproof and breathable coating), the crack bridging ability under the same dry film thickness condition is about 2 mm. It can be seen that through the new coating structure design, the anti-cracking ability of the elastic waterproof and breathable layer is increased by 1 - 3 times. The above composite coating specimens have passed the immersion tests in water, alkali, brine and sodium sulfate solution (the treatment time is 168 h according to 8.2.5 in GB / T 16777-1997), and the coating is intact without blistering and cracking phenomena.

[0025] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A nano anti-carbonation concrete coating structure that can be spray-applied, comprising a nano primer sealant bottom layer (2), a nano hyperbranched permeable acrylic coating layer (3), and a hydrophobic anti-carbonation silicon resin coating surface layer (4) sequentially arranged above the surface of the concrete floor (1); Wherein: The nano primer sealant bottom layer (2) is adhesively connected to the concrete surface. Through the penetration of the nano-scale small molecule resin of the nano primer sealant, it combines and interweaves with the concrete depth to form a three-dimensional networked dense structure; The nano hyperbranched permeable acrylic coating layer (3) is adhesively connected to the nano primer sealant bottom layer (2); The hydrophobic anti-carbonation silicon resin coating surface layer (4) is adhesively connected to the nano hyperbranched permeable acrylic coating layer (3).

2. The nano anti-carbonation concrete coating structure capable of spray construction according to claim 1, wherein: The thickness of the nano primer sealant bottom layer (2) is 0.5 to 2.5 mm.

3. A nano anti-carbonation concrete coating structure capable of spray construction according to claim 1, characterized in that: The thickness of the nano hyperbranched permeable acrylic coating layer (3) is 0.8 to 1.2 mm.

4. A nano anti-carbonation concrete coating structure capable of spray construction according to claim 1, characterized in that: The thickness of the hydrophobic anti-carbonation silicon resin coating surface layer (4) is 40 to 60 μm.

Images