Concrete structure special for terrace crack resistance

Abstract

The utility model discloses a special concrete structure for terrace crack resistance, which comprises a concrete base layer, a concrete strengthening layer is arranged on the upper surface of the concrete base layer, polypropylene fibers are arranged in the concrete strengthening layer, the polypropylene fibers are uniformly distributed, and the polypropylene fibers are arranged in the concrete strengthening layer. A cement-based interface agent coating is arranged on the upper surface of the concrete strengthening layer, a concrete surface layer is arranged on the upper surface of the cement-based interface agent coating, steel fibers are arranged in the concrete surface layer and are uniformly distributed, and a carborundum wear-resistant coating is arranged on the upper surface of the concrete surface layer. By arranging the bottom bars, the surface bars, the polypropylene fibers, the steel fibers and the like, the tensile property and the crack resistance of the concrete structure are improved, and cracks are effectively reduced; by arranging the water pipes, the expansion joints and the expansion reinforcing belts, the anti-cracking effect is further enhanced, the service life of the terrace is prolonged, and the structural stability and practicability are improved.

Description

Technical Field

[0001] This utility model relates to the field of concrete structure technology, and in particular to a special concrete structure for crack-resistant flooring. Background Technology

[0002] In the fields of industrial and civil buildings, the performance of the floor is of paramount importance as the basic structure that bears ground loads and allows personnel and equipment to pass through and operate.

[0003] However, traditional concrete floors are prone to problems such as cracks, sanding, and damage due to the influence of material properties, construction technology, and environmental factors (such as temperature changes and repeated loads). The occurrence of cracks not only damages the appearance of the floor, but also allows moisture and oil to penetrate, accelerates the corrosion of the steel bars inside the concrete, deteriorates the structure, reduces the load-bearing capacity and service life of the floor, and increases the later maintenance costs. Therefore, we propose a special concrete structure for crack-resistant floors. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a special concrete structure for crack-resistant flooring.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A special concrete structure for crack-resistant flooring includes a concrete base layer, a concrete reinforcing layer on the upper surface of the concrete base layer, polypropylene fibers uniformly distributed inside the concrete reinforcing layer, a cement-based interface agent coating on the upper surface of the concrete reinforcing layer, a concrete surface layer on the upper surface of the cement-based interface agent coating, steel fibers uniformly distributed inside the concrete surface layer, and a corundum wear-resistant coating on the upper surface of the concrete surface layer.

[0007] Preferably, the concrete base layer is provided with bottom reinforcement bars, and the concrete surface layer is provided with top reinforcement bars.

[0008] Preferably, an expansion joint is provided inside the concrete surface layer, and an expansion reinforcement strip is provided inside the expansion joint.

[0009] Preferably, a water pipe is provided inside the concrete reinforcement layer, the water pipe is distributed in a meandering manner, and positioning ribs are provided on the side of the water pipe.

[0010] Preferably, one end of the water pipe is connected to a water inlet connector, and the other end of the water pipe is connected to a water outlet connector.

[0011] Preferably, the side of the concrete reinforcement layer is provided with a seal, and the water inlet connector and the water outlet connector are located inside the seal.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. In this utility model, by setting bottom reinforcement, top reinforcement, polypropylene fiber, steel fiber, etc., the tensile and crack resistance of concrete structures are improved from different structural levels and material properties, effectively reducing the occurrence of cracks.

[0014] 2. In this utility model, by setting water pipes, expansion joints, and expansion reinforcement strips, the temperature can be adjusted, stress can be released, and shrinkage can be compensated, thereby further enhancing the crack resistance, extending the service life of the floor, and improving the structural stability and practicality. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of a special concrete structure for crack-resistant flooring proposed in this utility model;

[0016] Figure 2 This is a structural cross-sectional view of a special concrete structure for crack-resistant flooring proposed in this utility model;

[0017] Figure 3 This is a schematic diagram of a water pipe structure for a special concrete structure for crack-resistant flooring proposed in this utility model.

[0018] In the diagram: 1 Concrete base layer, 2 Concrete reinforcement layer, 3 Polypropylene fiber, 4 Cement-based interface agent coating, 5 Concrete surface layer, 6 Steel fiber, 7 Emery wear-resistant coating, 8 Bottom reinforcement, 9 Top reinforcement, 10 Expansion joint, 11 Expansion reinforcement strip, 12 Water pipe, 13 Positioning reinforcement, 14 Water inlet connector, 15 Water outlet connector, 16 Sealing. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figure 1-3A special concrete structure for crack-resistant flooring includes a concrete base layer 1, which can be cast using concrete with a strength grade of not less than C25 to provide stable support for the upper structure. The concrete base layer 1 has internal reinforcement bars 8, which enhance the base layer's resistance to uneven settlement and load deformation, and suppress cracks caused by stress concentration in the foundation. A concrete reinforcing layer 2 is provided on the upper surface of the concrete base layer 1. The reinforcing layer 2 contains uniformly distributed polypropylene fibers 3, which can be made of C30-C35 concrete. The fibers bridging the surface of the reinforcing layer 2 effectively prevent cracking. The function of the reinforced concrete layer 2 is to prevent the generation and propagation of micro-cracks within the concrete, thereby improving its crack resistance and toughness. Water pipes 12 are installed inside the reinforced concrete layer 2 in a meandering pattern. Positioning ribs 13 are provided on the sides of the water pipes 12. The water pipes 12 can be made of corrosion-resistant, thermally conductive PVC or PE pipes, and their positions are fixed by the positioning ribs 13 to facilitate the later introduction of circulating water, regulating the concrete temperature and preventing cracking caused by excessive temperature stress. A cement-based interface agent coating 4 is applied to the upper surface of the reinforced concrete layer 2. The cement-based interface agent coating 4 can be a high-adhesion cement-based interface agent, enhancing the bond between the reinforced concrete layer 2 and the concrete surface layer 5. The bonding strength forms a continuous and synergistic structural layer, preventing the surface layer and reinforcement layer from delaminating and peeling due to bonding failure, which could lead to cracks. A concrete surface layer 5 is placed on the upper surface of the cement-based interface agent coating 4. The concrete surface layer 5 can be cast using C35-C40 concrete. Steel fibers 6 are evenly distributed inside the concrete surface layer 5. The steel fibers 6 can be copper-plated microfiber steel fibers. Through the dispersing tensile strength of the steel fibers, the crack resistance and impact resistance of the surface layer are significantly enhanced, inhibiting the initiation and development of cracks under load. Top reinforcement 9 is placed inside the concrete surface layer 5. The top reinforcement 9 and bottom reinforcement 8 form a two-way steel mesh constraint, improving the overall surface finish. To improve the tensile strength of the concrete surface layer 5, an expansion joint 10 is provided inside the concrete surface layer 5. An expansion reinforcement strip 11 is provided inside the expansion joint 10. The expansion reinforcement strip 11 can be made of shrinkage-compensating concrete with controllable expansion rate. It provides compensation stress when the concrete shrinks, releases the internal stress generated by temperature and drying shrinkage deformation, and further improves the crack resistance. The upper surface of the concrete surface layer 5 is provided with a diamond abrasion wear-resistant coating 7. The diamond abrasion wear-resistant coating 7 can be made of wear-resistant material composed of diamond aggregate, special cement and admixtures. It can significantly improve the wear resistance and impact resistance of the floor surface, while enhancing the surface density, reducing the risk of oil and water penetration, and protecting the underlying concrete structure.

[0021] Reference Figure 3One end of the water pipe 12 is connected to an inlet connector 14, and the other end is connected to an outlet connector 15. When the ambient temperature is high, cold water is introduced through the inlet connector 14, allowing the cold water to circulate within the water pipe 12 and carry away the heat from the concrete. In cold seasons, warm water can be introduced through the inlet connector 14, allowing the warm water to circulate within the water pipe 12 and raising the temperature of the concrete, thus preventing cracks from forming due to temperature changes. A sealing opening 16 is provided on the side of the concrete reinforcement layer 2. The inlet connector 14 and the outlet connector 15 are located inside the sealing opening 16. A removable sealing cap (rubber plug / metal cover) can be installed at the sealing opening 16. The sealing cap fits tightly with the groove to prevent debris from entering the water pipe.

[0022] Working principle: When pouring concrete base layer 1, clean up debris and loose soil in the construction area, compact the base, and ensure that the bearing capacity of the foundation meets the design. Place the bottom reinforcement 8 on the compacted base to form a mesh, and fix it by binding or welding to ensure that the reinforcement mesh is flat and firm, and the distance between it and the base meets the protection requirements. Use concrete with a strength grade of not less than C25 for pouring, and use a plate vibrator to vibrate and compact it, control the flatness and elevation of the base layer, and cure it to more than 70% of the design strength.

[0023] When pouring the concrete reinforcement layer 2 on the concrete base layer 1, first add polypropylene fiber 3 to the C30-C35 concrete and mix it with a forced mixer to ensure that the fiber is evenly dispersed and without lumps. Then, mark the lines on the base layer surface to determine the meandering distribution path of the water pipe 12. Then, fix the water pipe 12 with positioning ribs 13 to ensure that the water pipe 12 has a consistent elevation and uniform spacing. Lead the water inlet connector 14 and water outlet connector 15 out of the reinforcement layer side and align them with the sealing position 16. Finally, pour the mixed reinforcement layer concrete on the base layer and vibrate it with an immersion vibrator to avoid touching or pressing the water pipe. After vibration, use a plate vibrator for secondary vibration to level it, so that the concrete is tightly bonded to the base layer and water pipe, and then cure it.

[0024] After the concrete reinforcement layer 2 has been cured, clean the surface dust and debris, rinse it with a high-pressure water gun, and keep the base layer dry and clean. According to the product instructions, mix the cement-based interface agent with water to a suitable consistency, and apply it evenly to the surface of the reinforcement layer with a roller brush or sprayer, ensuring that there are no missed areas or drips. Allow it to cure naturally until the interface agent has initially set and a bonding transition layer is formed.

[0025] When pouring the concrete surface layer 5, place the reinforcing bars 9 on the cement-based interface agent coating 4 to form a reinforcing mesh, corresponding to the bottom reinforcing bars 8. Sprinkle the steel fibers 6 evenly into the C35-C40 concrete to be poured, stir again to ensure the fibers are dispersed, pour the mixed surface concrete onto the cement-based interface agent coating 4, and vibrate with an immersion vibrator, focusing on vibrating the reinforcing mesh and areas where steel fibers are concentrated to avoid fiber clumping. After vibration, level with an aluminum alloy scraper, and then use a plate vibrator to compact it to make the surface smooth.

[0026] Before the surface concrete initially sets, use a cutting machine or a template to create expansion joints 10. Fill the joints with expansion reinforcement strip 11 (shrinkage-compensating concrete), vibrate and compact it until it is flush with the surface layer, ensuring good adhesion between the expansion strip and the concrete. During the initial setting stage (when a slight indentation is left when pressed with a finger), apply abrasive-resistant material to the surface concrete in two stages. The first stage is done with a mechanical trowel (equipped with a disc) to ensure the material is fully bonded to the concrete. The second stage is done again until the surface is smooth and glossy, forming a thick abrasive-resistant coating. After the abrasive-resistant coating 7 is completed, cover it with a curing film or spray water to keep the surface moist and prevent early water loss and cracking.

[0027] A removable sealing cap (rubber plug / metal cover) can be installed at the seal 16. The sealing cap fits tightly with the groove to prevent debris from entering the water pipe. At the same time, the water pipe 12 is equipped with a water circulation device. When the ambient temperature is high, cold water is introduced through the water inlet connector 14, allowing the cold water to circulate in the water pipe 12 and remove the heat from the concrete. In the cold season, warm water can be introduced through the water inlet connector 14, allowing the warm water to circulate in the water pipe 12 and raise the temperature of the concrete, thereby preventing cracks in the concrete due to temperature changes.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A special concrete structure for crack-resistant flooring, comprising a concrete base layer (1), characterized in that, The upper surface of the concrete base layer (1) is provided with a concrete reinforcing layer (2), the interior of the concrete reinforcing layer (2) is provided with polypropylene fibers (3), the polypropylene fibers (3) are evenly distributed, the upper surface of the concrete reinforcing layer (2) is provided with a cement-based interface agent coating (4), the upper surface of the cement-based interface agent coating (4) is provided with a concrete surface layer (5), the interior of the concrete surface layer (5) is provided with steel fibers (6), the steel fibers (6) are evenly distributed, and the upper surface of the concrete surface layer (5) is provided with a diamond abrasion resistant coating (7).

2. The special concrete structure for crack-resistant flooring according to claim 1, characterized in that, The concrete base layer (1) is provided with bottom reinforcement (8), and the concrete surface layer (5) is provided with top reinforcement (9).

3. The special concrete structure for crack-resistant flooring according to claim 1, characterized in that, The concrete surface layer (5) has an expansion joint (10) inside, and an expansion reinforcement strip (11) is provided inside the expansion joint (10).

4. The special concrete structure for crack-resistant flooring according to claim 1, characterized in that, Water pipes (12) are installed inside the concrete reinforcement layer (2). The water pipes (12) are distributed in a meandering manner, and positioning ribs (13) are provided on the side of the water pipes (12).

5. A special concrete structure for crack-resistant flooring according to claim 4, characterized in that, One end of the water pipe (12) is connected to a water inlet connector (14), and the other end of the water pipe (12) is connected to a water outlet connector (15).

6. A special concrete structure for crack-resistant flooring according to claim 5, characterized in that, The side of the reinforced concrete layer (2) is provided with a seal (16), and the water inlet connector (14) and the water outlet connector (15) are located inside the seal (16).

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