A laminated high-resistance concrete inspection walkway plate

Abstract

The utility model discloses a kind of laminated high-resistance concrete inspection walkway plates, belong to building material and electric power engineering facility technical field.The walkway plate is prefabricated plate-like component, is composed of wear surface layer and high-resistance concrete bottom layer through concave-convex interlocking structure, and the unique laminated interlocking structure of the utility model realizes the optimal combination of surface wear resistance and overall high insulation, and the drainage gap design can effectively prevent damp, and the insulation flange provided by the bottom layer wide out forms safety redundancy.The walkway plate is particularly suitable for the substation inspection passage with special requirements for insulation performance, with the advantages of stable structure, durable insulation performance, safe and reliable, etc.

Description

Technical Field

[0001] This utility model belongs to the technical field of building materials and power engineering facilities, and specifically relates to a layered high-resistivity concrete patrol walkway slab. Background Technology

[0002] In the daily operation and maintenance of substations, inspection passages are the areas with the most frequent personnel activity. The paving stones on these passages not only need to withstand the physical wear and tear caused by long-term foot traffic and equipment handling, but also need to provide reliable electrical insulation for the safety of maintenance personnel. This unique application scenario places performance requirements on paving stones that are far higher than those for ordinary municipal or building materials. However, existing paving stone products have significant limitations in their design, making it difficult for them to fully meet the high standards required in the substation environment.

[0003] Firstly, at the structural design level, most walkway slabs adopt traditional configurations of homogeneous single units or simple planar layers. On the one hand, dense and hard materials to ensure surface wear resistance often lack excellent and stable high resistivity. On the other hand, functional materials that improve volume resistivity have lower surface hardness and wear resistance. This inherent contradiction between mechanical and electrical properties often cannot be balanced. Therefore, even in multi-layer composite components, the layers are mostly bonded by adhesives in a planar, non-mechanical manner. Under the effects of thermal expansion and contraction caused by alternating day and night temperature differences and long-term alternating loads, this bonding method is prone to fatigue stress at the bonding interface, leading to interlayer delamination, slippage, or even complete separation. Simultaneously, the structural design of existing walkway slabs generally lacks proactive consideration for the natural environment, especially rainwater intrusion. Their edges are often flat straight seams or simple decorative chamfers, making it easy for rainwater falling on the slab surface to seep down the sidewalls, or this is often not addressed, allowing rainwater to penetrate the core area through the capillary channels inside the slab, directly causing the insulation performance of the walkway slab to fluctuate significantly with ambient humidity. Furthermore, a particularly prominent common flaw lies in the fact that existing designs rely on the initial cross-sectional dimensions of the components for performance and safety. Once the surface layer thins due to wear over time, its effective load-bearing cross-section decreases, structural stiffness declines, and the overall safety reserve of the component is weakened. However, most walkway slabs do not inherently possess any mechanism to maintain overall performance or provide additional protection after normal wear and tear of the surface material, leaving the product's reliability and safety at risk after a certain period of use.

[0004] As we all know, the cement industry is a major sector of energy and resource consumption and greenhouse gas emissions. Its production process often releases a large amount of carbon dioxide, which contradicts the current macro requirements for promoting green buildings. How to achieve low-carbon production processes while pursuing performance is a common problem that urgently needs to be solved in this field. Summary of the Invention

[0005] In view of the common problems existing in the existing walkway slabs, this utility model provides a layered high-resistance concrete inspection walkway slab, aiming to obtain a multifunctional walkway slab product that combines high insulation properties, excellent wear resistance, structural integrity, active moisture protection and environmental friendliness.

[0006] To achieve this objective, the following solution is provided: It includes an upper wear-resistant surface layer and a lower concrete substrate; the wear-resistant surface layer and the concrete substrate are connected by a concave-convex interlocking structure; the wear-resistant surface layer has downwardly extending protrusions on both sides, which are embedded downward into the concrete substrate; the width of the concrete substrate is greater than that of the wear-resistant surface layer, and the horizontally extended portions on both sides form insulating flanges, the upper surface of which extends upward to form an edging; a drainage gap is formed between the sidewall of the wear-resistant surface layer and the edging of the concrete substrate, and its bottom is formed by the insulating flange.

[0007] Furthermore, the wear-resistant surface layer contains wear-resistant aggregate.

[0008] Furthermore, the thickness of the protrusion embedded downward into the concrete substrate is 1 / 5 to 1 / 3 of the thickness of the concrete substrate.

[0009] Furthermore, the width of the insulating flanges extending horizontally from both sides of the concrete substrate beyond the wear-resistant surface layer is 90 mm.

[0010] Furthermore, the height of the edging above the wear-resistant surface layer 1 is 10~30 mm.

[0011] Furthermore, both the wear-resistant surface layer and the concrete substrate are treated with CO2 curing.

[0012] Furthermore, the wear-resistant surface layer and the concrete substrate are impregnated with a water-repellent agent layer in their surface and internal pores.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This utility model, by setting a high-strength, wear-resistant surface layer and a high-resistivity concrete base layer, allows different materials to perform their respective functions, fundamentally solving the contradiction that homogeneous materials cannot simultaneously achieve wear resistance and high insulation. It achieves the optimal combination of surface performance and overall electrical insulation performance. Simultaneously, the interlocking structure between the surface and base layers creates a powerful mechanical interlocking force, enhancing the integrity of the component, effectively preventing interlayer peeling and misalignment, and significantly extending its service life. 2. The edge-sealing and drainage gap designed in this utility model form a highly efficient active moisture-proof system, which can quickly drain surface water and block the water penetration path, ensuring the long-term stability of insulation performance from a physical structure perspective; the insulating flange formed by the part of the concrete bottom layer that extends beyond the wear-resistant surface layer provides valuable safety redundancy, ensuring sufficient insulation thickness and creepage distance even after the wear-resistant surface layer is worn, thus establishing a dual protection mechanism.

[0014] 3. This utility model transcends the level of simply superimposing existing technologies. Through systematic innovation in structural design and material processes, it constructs a comprehensive protective structure that integrates active moisture protection, mechanical interlocking, electrical isolation, and safety redundancy. The resulting walkway slab product successfully achieves a high degree of unity between high insulation stability, excellent wear resistance, superior structural integrity, long-term durability, and significant environmental friendliness, providing a safe, reliable, and environmentally friendly ideal solution for substation inspection passages. Attached Figure Description Figure 1 This is a schematic diagram of the structure of the layered high-resistivity concrete patrol walkway slab of this utility model; Figure 2 This is a schematic diagram of the structure for laying and installing the layered high-resistivity concrete patrol walkway slab of this utility model.

[0015] The markings in the attached diagram are as follows: 1. Wear-resistant surface layer; 2. Concrete base layer; 3. Raised surface; 4. Insulating flange; 5. Edge banding; 6. Drainage gap; 7. Layered high-resistance concrete patrol walkway slab; 8. Cement-stabilized crushed stone compacted layer; 9. Plain soil compacted layer. Detailed Implementation

[0016] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0017] Reference Figure 1 The present invention provides a layered high-resistance concrete patrol walkway slab, which is a prefabricated plate-shaped component, comprising an upper wear-resistant surface layer 1 and a lower concrete bottom layer 2; the wear-resistant surface layer 1 and the concrete bottom layer 2 are connected by a concave-convex interlocking structure; the two sides of the wear-resistant surface layer 1 have downwardly extending protrusions 3, which are embedded downward into the concrete bottom layer 2. The width of the concrete base layer 2 is greater than that of the wear-resistant surface layer 1. The horizontally extended portions on both sides are insulating flanges 4, with a width of 90 mm. The setting and width design of the insulating flanges 4 can increase the creepage distance and provide insulation protection. The upper surface of the insulating flanges 4 extends upward to form an edge 5. The drainage gap 6 is formed between the side wall of the wear-resistant surface layer 1 and the edge of the concrete base layer 2. Its bottom is formed by the insulating flanges 4. This structure can quickly guide water on the slab to the sides of the walkway slab and drain away, effectively reducing the penetration of water into the concrete base layer 2.

[0018] As a preferred embodiment, the wear-resistant surface layer 1 contains wear-resistant aggregate, which can be selected as quartz sand to improve the hardness and wear resistance of the surface layer; the upper surface of the wear-resistant surface layer 1 can be made into a symmetrical slope structure on both sides to facilitate the drainage of water into the drainage gap 6.

[0019] As a preferred embodiment, the thickness of the protrusion 3 embedded downward into the concrete base layer 2 is 1 / 5 to 1 / 3 of the thickness of the concrete base layer 2. This thickness allows the wear-resistant surface layer to be effectively fixed by the mortise and tenon structure without slippage.

[0020] As a preferred embodiment, the edge is 10-30 mm higher than the wear-resistant surface layer 1, which can effectively block and guide water flow, while clearly defining the physical perception boundary to avoid the risk of feet accidentally slipping off the walkway slab.

[0021] In a preferred embodiment, both the wear-resistant surface layer 1 and the concrete substrate 2 undergo CO2 curing treatment. A water-repellent agent layer is impregnated on the surface and in the internal pores of both the wear-resistant surface layer 1 and the concrete substrate 2. The CO2 curing process generates dense calcium carbonate through a carbon fixation reaction, effectively blocking the concrete pores and significantly increasing its volume resistivity. This dense structure simultaneously enhances the water resistance of the matrix and, in conjunction with the water-repellent agent treatment, constructs a dual moisture barrier, achieving high insulation, durability, and environmental friendliness of the walkway slab from the material's origin. Furthermore, testing shows that the volume resistivity of the concrete substrate is not less than 1×10⁻⁶. 4 Ω·m When laying and installing this new type of layered high-resistivity concrete patrol walkway slab on site, it can be referred to... Figure 2 The construction method shown is as follows, from top to bottom: 7. Layered high-resistivity concrete patrol walkway slab, 8. Cement-stabilized crushed stone compacted layer, and 9. Plain soil compacted layer; wherein, the compaction degree of the cement-stabilized crushed stone layer shall not be less than 0.94, and the compaction coefficient of the plain soil compacted layer shall not be less than 0.94.

[0022] Those skilled in the art can make adaptive adjustments to the overall thickness of the walkway slabs and the material of the wear-resistant aggregates based on the site geological conditions.

[0023] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A layered high-resistivity concrete patrol walkway slab, characterized in that, It includes an upper wear-resistant surface layer (1) and a lower concrete substrate (2); the wear-resistant surface layer (1) and the concrete substrate (2) are connected by a concave-convex interlocking structure; the wear-resistant surface layer (1) has downwardly extending protrusions (3) on both sides, and the protrusions (3) are embedded downward into the concrete substrate (2); the width of the concrete substrate (2) is greater than that of the wear-resistant surface layer (1), and the horizontally extended portions on both sides form insulating flanges (4), and the upper surface of the insulating flanges (4) extends upward to form a edging (5); a drainage gap (6) is formed between the sidewall of the wear-resistant surface layer (1) and the edging (5) of the concrete substrate (2), and its bottom is formed by the insulating flange (4).

2. The layered high-resistivity concrete patrol walkway slab according to claim 1, characterized in that, The wear-resistant surface layer (1) contains wear-resistant aggregate.

3. The layered high-resistivity concrete patrol walkway slab according to claim 1, characterized in that, The thickness of the protrusion (3) embedded downward into the concrete substrate (2) is 1 / 5 to 1 / 3 of the thickness of the concrete substrate (2).

4. The laminated high-resistivity concrete patrol walkway slab according to claim 1, characterized in that, The width of the insulating flange (4) of the wear-resistant surface layer (1) on both sides of the concrete base layer (2) is 90 mm.

5. A layered high-resistivity concrete patrol walkway slab according to claim 1, characterized in that, The height of the edge (5) above the wear-resistant surface layer (1) is 10~30 mm.

6. The laminated high-resistivity concrete patrol walkway slab according to claim 1, characterized in that, Both the wear-resistant surface layer (1) and the concrete base layer (2) are treated with CO2 curing.

7. A layered high-resistivity concrete patrol walkway slab according to claim 1, characterized in that, The wear-resistant surface layer (1) and the concrete base layer (2) are impregnated with a water-repellent agent layer in their surface and internal pores.

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