A small prefabricated component with improved durability

Abstract

The application relates to the technical field of building components, in particular to a small prefabricated component capable of improving durability, which comprises a prefabricated component main body, a plurality of water passing holes are arranged through the upper and lower surfaces of the prefabricated component main body, and a steel reinforcement framework is arranged in the prefabricated component main body; the surface of the prefabricated component main body and the inner wall of the water passing holes are both provided with anticorrosive reinforcing layers, and the surface of the steel reinforcement framework is provided with an anticorrosive protective layer. The small prefabricated component has the advantages of convenient construction, good protection effect, low cost and the like, and can be applied to various small prefabricated components, and has good engineering application value and popularization prospect.

Description

Technical Field

[0001] This application relates to the field of building component technology, and in particular to a small prefabricated component that can improve durability. Background Technology

[0002] In modern highway and municipal infrastructure construction, small components such as precast concrete cover slabs serve as crucial road facilities, undertaking key functions such as drainage and protecting road edges. However, these small components are constantly exposed to complex and changing outdoor environments, making their durability increasingly critical. In winter, the frequent use of de-icing salt interacts with rainwater erosion, causing weathering and spalling on the concrete surface, and the internal reinforcing steel also corrodes due to chemical corrosion, leading to premature deterioration of the component's structural performance. Data shows that the actual service life of traditional small precast components is generally 30%-50% shorter than their design life. This not only significantly increases the later maintenance costs of road facilities but also seriously affects the overall performance and safety of roads. Currently, the field of concrete protection has developed relatively mature surface protection technologies such as silane impregnation and cement-based penetrating crystallization waterproofing. However, these technologies are mostly designed for large structures such as bridge beams and concrete railings, and there are many technical bottlenecks in their application to small precast components. First, the applicability of the protected objects is insufficient. Small precast components are often excluded from the existing protection system due to their small size, limited construction space, and low cost-effectiveness, becoming a "blind spot" for concrete surface protection. Second, the adaptability of construction processes is poor. Traditional processes such as brushing, rolling, and spraying are difficult to adapt to the water-permeable hole structure and thin-walled cross-section of concrete cover plates, and the construction efficiency is low, the quality is unstable, and the labor cost is high. Third, the environmental compatibility risks are prominent. Conventional protection processes are prone to causing pollution from the scattering of protective materials during construction. At the interface between the component and the asphalt pavement, the protective material may also react adversely with the asphalt, leading to pavement performance degradation and environmental pollution. Utility Model Content

[0003] This utility model mainly addresses the problems of poor durability and difficulty in protection of existing small precast components, and provides a small precast component that can improve durability.

[0004] The objective of this utility model is mainly achieved through the following solution: A small precast component with improved durability includes a precast component body, wherein a plurality of water passage holes are provided through the upper and lower surfaces of the precast component body, and a steel reinforcement skeleton is provided inside the precast component body; the surface of the precast component body and the inner wall of the water passage holes are all reinforced with anti-corrosion layers, and the surface of the steel reinforcement skeleton is provided with an anti-corrosion protective layer.

[0005] Preferably, the water passage holes are vertically arranged waist-shaped holes, and the water passage holes are evenly arranged along the length direction of the prefabricated component body.

[0006] Preferably, the prefabricated component body has symmetrical waist openings on the left and right sides, and the waist openings between two adjacent prefabricated component bodies can be spliced ​​to form a water passage hole.

[0007] Preferably, the upper and lower surfaces of the prefabricated component body are provided with grooves and / or protrusions.

[0008] Preferably, the prefabricated component body has several evenly distributed strip grooves on all four sides.

[0009] Preferably, the anti-corrosion reinforcement layer is an anti-corrosion concrete layer integrally formed with the main body of the precast component or an anti-corrosion coating applied to the surface of the main body of the precast component and the inner wall of the water passage hole.

[0010] Preferably, the anti-corrosion coating is a silane impregnation coating or a cement-based penetrating crystalline waterproof coating.

[0011] Preferably, the anti-corrosion protective layer is an epoxy coating or a zinc plating layer.

[0012] Preferably, the surface of the anti-corrosion protective layer is provided with a silane impregnation transition layer.

[0013] Preferably, the top inner wall of the water passage is provided with an inclined guide slope.

[0014] In summary, compared with the prior art, the present invention has the following beneficial technical effects: (1) This utility model can provide all-round protection and significantly improve durability. The anti-corrosion reinforcement layer on the surface of the precast component and the inner wall of the water passage hole, combined with the anti-corrosion protection layer on the surface of the steel skeleton, forms a multi-layer protection system from the outside to the inside, which can effectively resist the erosion of environmental factors such as de-icing salt and rainwater, and extend the service life of the component. The inclined guide slope on the inner wall of the top of the water passage hole can quickly guide the water flow out and reduce the erosion of the component by the accumulated water. (2) This utility model can improve the performance of use. The water passage hole adopts waist-shaped hole and is evenly arranged. While ensuring the drainage function, it enhances the overall strength of the component. The groove and / or protrusion and strip groove 7 increase the contact area of ​​the protective material, making the corrosion inhibitor penetrate more evenly and the protective effect better. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a bottom view of the present invention; Figure 3 This is a schematic diagram of the internal structure of this utility model.

[0016] Reference numerals in the attached drawings: 1-Main body of precast component; 2-Water passage hole; 3-Reinforcing steel skeleton; 4-Waist; 5-Groove; 6-Protrusion; 7-Strip groove; 8-Inclined guide slope. Detailed Implementation

[0017] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of this utility model is not limited to the following embodiments, and any modifications and / or alterations made to this utility model will fall within the protection scope of this utility model.

[0018] Example: like Figure 1 , 2 As shown, this utility model discloses a technical solution, a small precast component that can improve durability. Taking a precast concrete cover plate as an example, it includes a precast component body 1. The upper and lower surfaces of the precast component body 1 are provided with a plurality of water passage holes 2, and a steel reinforcement skeleton 3 is pre-embedded inside the precast component body 1. The steel reinforcement skeleton 3 should avoid the water passage holes 2. The surface of the precast component body 1 and the inner wall of the water passage holes 2 are all reinforced with anti-corrosion layers, and the surface of the steel reinforcement skeleton 3 is provided with an anti-corrosion protective layer.

[0019] By setting through-holes 2 in the main body 1 of the precast component, the drainage function can be effectively realized, reducing the erosion of the component by accumulated water. The internal steel reinforcement skeleton 3 enhances the overall strength of the component. The anti-corrosion reinforcement layer on the surface of the main body 1 of the precast component and the inner wall of the through-holes 2, combined with the anti-corrosion protection layer on the surface of the steel reinforcement skeleton 3, constructs a multi-layer protection system, isolating external corrosive media from the outside to the inside, significantly improving the durability of small precast components, extending their service life, and reducing later maintenance costs.

[0020] Specifically, the water passage holes 2 are vertically arranged waist-shaped holes, and the water passage holes 2 are evenly arranged along the length direction of the prefabricated component body 1. In this embodiment, there are three sets of water passage holes 2.

[0021] Specifically, the precast component body 1 has symmetrical waist-shaped openings 4 on both sides. The waist-shaped openings 4 between two adjacent precast component bodies 1 can be spliced ​​to form a water passage hole 2. This allows adjacent components to be combined to form a complete water passage hole 2 when spliced, which improves the convenience and accuracy of installation, reduces installation time and labor costs, and enhances drainage performance and overall waterproofing effect.

[0022] Specifically, the upper and lower surfaces of the precast component body 1 are uniformly provided with several grooves 5 and / or protrusions 6, which increases the surface roughness and surface area of ​​the component. During anti-corrosion treatment, the anti-corrosion reinforcement layer can make more sufficient contact with the surface of the component, improve the adhesion and penetration uniformity of the anti-corrosion material, and thus enhance the protective effect. In addition, the concave and convex structure can also increase friction and facilitate use.

[0023] Specifically, such as Figure 3 As shown, several evenly distributed strip grooves 7 are provided around the main body 1 of the precast component, which further increases the surface area of ​​the component. During the immersion anti-corrosion treatment, it can accommodate more anti-corrosion material, promote the penetration of anti-corrosion material into the component, and improve the protective performance of the anti-corrosion reinforcement layer. At the same time, when the components are spliced, the strip grooves 7 can serve as a space for filling material, enhance the connection and sealing between adjacent components, prevent moisture and corrosive media from penetrating, and improve the overall durability of the component.

[0024] Specifically, the anti-corrosion reinforcement layer is either an integrally formed anti-corrosion concrete layer with the precast component body 1 or an anti-corrosion coating applied to the surface of the precast component body 1 and the inner wall of the water passage hole 2. The anti-corrosion coating is either a silane impregnation coating or a cement-based penetrating crystalline waterproof coating. Whether the anti-corrosion reinforcement layer is an integrally formed anti-corrosion concrete layer with the precast component body 1 or a coated anti-corrosion coating, it can be tightly adhered to the surface of the component and the inner wall of the water passage hole 2. The integrally formed anti-corrosion concrete layer enhances the anti-corrosion performance from the source of component manufacturing, forming an integral whole with the component, providing long-lasting and stable protection. The coated anti-corrosion coating can be selected according to different usage environments and needs, such as a silane impregnation coating or a cement-based penetrating crystalline waterproof coating, which has strong targeting and flexibility, effectively blocking external corrosive factors and improving the durability of the component.

[0025] Specifically, the anti-corrosion protective layer is either an epoxy coating or a galvanized layer. The epoxy coating has excellent adhesion, chemical corrosion resistance, and abrasion resistance, and can adhere tightly to the surface of the steel reinforcement cage 3 to form a continuous and dense protective film, effectively isolating air, moisture, and corrosive substances from contact with the steel reinforcement and preventing it from rusting. The galvanized layer, through the electrochemical protection of the zinc layer, allows zinc to be preferentially corroded even if the zinc layer is partially damaged, thereby protecting the internal steel reinforcement. Both can provide reliable anti-corrosion protection for the steel reinforcement cage 3, ensuring the stability and durability of the small precast component structure.

[0026] Specifically, the surface of the anti-corrosion protective layer is provided with a silane impregnation transition layer. The silane impregnation transition layer can further enhance the isolation effect between the anti-corrosion protective layer and the external environment. Silane molecules can penetrate into the tiny pores on the surface of the anti-corrosion protective layer to form a hydrophobic layer, preventing the intrusion of moisture and corrosive media. At the same time, the silane impregnation transition layer can also play a buffering role, mitigating the impact of changes in the external environment on the anti-corrosion protective layer, extending the service life of the anti-corrosion protective layer, and thus improving the durability of the entire small precast component.

[0027] Specifically, the top inner wall of the water passage 2 is provided with an inclined guide slope 8, which allows the water to flow quickly downwards under the action of gravity, preventing water from accumulating on the top inner wall of the water passage 2. This reduces the soaking time and degree of erosion of the inner wall of the water passage 2 by accumulated water. Combined with the anti-corrosion reinforcement layer, it effectively protects the inner wall of the water passage 2, improves the waterproof and durability performance of the small prefabricated component, and ensures the long-term stable operation of its drainage function.

[0028] This document provides a specific solution for a small precast component that can improve durability. The main body 1 of the precast component is made of conventional concrete. The surface of the internal steel reinforcement skeleton 3 is sprayed with an epoxy coating as an anti-corrosion protective layer. A silane impregnation transition layer is then applied to the epoxy coating surface. The surface of the main body 1 and the inner wall of the water passage 2 are coated with a silane impregnation coating as an anti-corrosion reinforcement layer. The water passage 2 is designed as a vertical waist-shaped hole, evenly distributed along the length of the cover plate. Waist-shaped sections 4 are set on the left and right sides. Grooves 5 with a depth of 2mm are machined on the upper and lower surfaces. Strip grooves 7 with a width of 3mm and a depth of 2mm are opened around the perimeter. An inclined guide slope 8 with an inclination angle of 15° is set on the inner wall of the top of the water passage 2. In practical applications, multiple cover plates are spliced ​​and installed by the waist-shaped sections 4. The anti-corrosion agent fully penetrates through the grooves 5, protrusions 6, and strip grooves 7, effectively improving the durability of the cover plate and ensuring smooth drainage.

[0029] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A small prefabricated component with improved durability, characterized in that: The precast component body (1) has several water passage holes (2) through its upper and lower surfaces, and a steel reinforcement skeleton (3) is provided inside the precast component body (1); the surface of the precast component body (1) and the inner wall of the water passage holes (2) are both reinforced with anti-corrosion layers, and the surface of the steel reinforcement skeleton (3) is provided with an anti-corrosion protective layer.

2. The small prefabricated component with improved durability according to claim 1, characterized in that: The water passage hole (2) is a waist-shaped hole arranged vertically, and the water passage hole (2) is evenly arranged along the length direction of the prefabricated component body (1).

3. A small prefabricated component with improved durability according to claim 2, characterized in that: The prefabricated component body (1) has symmetrical waists (4) on its left and right sides, and the waists (4) between two adjacent prefabricated component bodies (1) can be spliced ​​to form a water passage hole (2).

4. A small prefabricated component with improved durability according to claim 1, characterized in that: The upper and lower surfaces of the prefabricated component body (1) are provided with grooves (5) and / or protrusions (6).

5. A small prefabricated component with improved durability according to claim 1, characterized in that: The prefabricated component body (1) has several evenly distributed strip grooves (7) around its perimeter.

6. A small prefabricated component with improved durability according to claim 1, characterized in that: The anti-corrosion reinforcement layer is an anti-corrosion concrete layer integrally formed with the precast component body (1) or an anti-corrosion coating applied to the surface of the precast component body (1) and the inner wall of the water passage hole (2).

7. A small prefabricated component with improved durability according to claim 6, characterized in that: The anti-corrosion coating is a silane impregnation coating or a cement-based penetrating crystalline waterproof coating.

8. A small prefabricated component with improved durability according to claim 1, characterized in that: The anti-corrosion protective layer is an epoxy coating or a zinc plating layer.

9. A small prefabricated component with improved durability according to claim 8, characterized in that: The surface of the anti-corrosion protective layer is provided with a silane impregnation transition layer.

10. A small prefabricated component with improved durability according to claim 1, characterized in that: The top inner wall of the water passage (2) is provided with an inclined guide slope (8).

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