A high-quality permeable paving brick

Abstract

This utility model relates to the field of paving brick technology and discloses a high-quality permeable paving brick made of natural sand, including a permeable skeleton layer, a bottom layer of high-quality natural sand permeable paving bricks at the bottom of the permeable skeleton layer, and a top layer of high-quality natural sand permeable paving bricks at the top of the permeable skeleton layer. In use, the corresponding conical drainage channels and through holes are coaxial and connected, achieving dual-effect permeability through siphoning and flushing. When water flows through the surface layer of the high-quality natural sand permeable paving bricks, the conical drainage channels increase the flow velocity and generate negative pressure suction. When the water flow is large, a high-speed jet forms in the channels to flush away sediment. The bricks are arranged in a honeycomb pattern during laying, and the corresponding arc-shaped male tenons and arc-shaped female tenons form an interlocking structure. The curved joints can automatically level the angle, and the interlocking structure increases the effective permeable joint width, thus improving permeability. The drainage channels in the interlocking area can form a dual drainage channel with the vertical infiltration holes.

Description

Technical Field

[0001] This utility model relates to the field of paving brick technology, specifically a high-quality permeable paving brick made of natural sand. Background Technology

[0002] High-quality natural sand permeable paving bricks are an innovative ecological paving material designed to solve problems such as waterlogging, heat island effect, and groundwater depletion caused by surface hardening during urbanization. Its unique structure achieves high-efficiency water permeability through the interconnected pores between aggregates and the microporous network formed by epoxy resin solidification, with a permeability coefficient of over 0.5 mm per second. It can quickly infiltrate small to medium rainfall, significantly reducing road surface water accumulation. Compared with traditional permeable bricks, the innovative advantages of high-quality natural sand bricks are primarily reflected in their material performance. Because they do not contain calcium dioxide and can prevent calcium ions from the underlying cement from overflowing, they maintain the crystal-clear natural stone texture of the surface layer for a long time. Meanwhile, the recycling of stone waste gives the bricks a variety of natural colors, reducing the pressure of construction waste disposal and avoiding the shot blasting process required for traditional engineered stone bricks, thus reducing energy consumption and pollution. In terms of ecological benefits, the bricks construct a "breathing" rainwater management system: rainwater infiltrates through the micropores of the surface layer, is purified through the permeable base layer, and replenishes groundwater, while regulating surface temperature and humidity. Actual measurements show that the evaporation of pore water can reduce the surface temperature of the paved area by 3-5°C, effectively mitigating the heat island effect. The porous structure can also absorb vehicle noise by 3-6 decibels, improving environmental comfort. In addition, the surface roughness (anti-slip coefficient BPN≥70) and rapid drainage characteristics greatly improve walking safety in rainy and snowy weather, avoiding traffic accidents caused by water accumulation and glare.

[0003] However, existing high-grade natural sand permeable paving bricks suffer from insufficient compressive strength due to their high permeability, making them prone to cracking. Furthermore, their single-aggregate structure makes it difficult to simultaneously meet the requirements of permeability, freeze-thaw resistance, and wear resistance. Therefore, those skilled in the art have developed a high-grade natural sand permeable paving brick to address the problems mentioned in the background section. Utility Model Content

[0004] The purpose of this utility model is to provide a high-quality permeable paving brick made of natural sand to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A high-grade permeable paving brick made of natural sand includes a permeable skeleton layer. The permeable skeleton layer has a bottom layer of high-grade permeable paving bricks at its bottom and a top layer of high-grade permeable paving bricks at its top. The top layer of high-grade permeable paving bricks has a conical drainage groove inside and a through hole inside. The permeable skeleton layer is hexagonal in shape, and has three arc-shaped male tenons on its outer side and three arc-shaped female tenons on its outer wall.

[0007] As a further improvement of this utility model: the through holes are arranged in an array within the permeable skeleton layer, and the outer surface of the high-grade natural sand permeable pavement brick surface layer is provided with a conical drainage groove that is coaxially connected to the through holes.

[0008] As a further improvement of this utility model: the through hole is a cylindrical channel with a diameter of 4 mm, the spacing between the holes is kept at 10 mm, and the axis is perpendicular to the bottom plane of the brick.

[0009] As a further improvement of this utility model, the conical drainage channel is an inverted truncated cone structure with an upper diameter of 2 mm, a lower diameter of 4 mm, and a channel depth ranging from 4 mm to 6 mm.

[0010] As a further improvement of this utility model: the high-grade natural sand permeable pavement brick surface layer is composed of modified natural sand aggregate, and the surface of the aggregate is coated with a silane coupling agent treatment layer.

[0011] As a further improvement of this utility model: the bottom layer of the high-grade natural sand permeable paving brick contains recycled aggregate from construction waste, and basalt short-cut fibers accounting for 0.5% of the concrete mass are added to the bottom layer of the high-grade natural sand permeable paving brick.

[0012] As a further improvement of this utility model, the mixture of the high-quality permeable pavement brick surface layer contains a nano-hydrophobic agent.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The top layer is a high-grade permeable paving brick surface layer, composed mainly of modified natural sand as the aggregate, combined with an inorganic nano-hydrophobic agent. The natural sand undergoes special modification treatment: first, it is soaked in a 3% hydrochloric acid solution for two hours to remove surface impurities; then, it is sprayed with a silane coupling agent; and finally, it is dried at 80 degrees Celsius. This modification enhances the adhesion between the natural sand and cement. The nano-hydrophobic agent is preferably silica particles modified with a silane coupling agent, which can form a micro-hydrophobic film in situ during cement hydration, achieving efficient drainage and anti-fouling functions. This high-grade permeable paving brick surface... The first layer is equipped with conical drainage channels to guide water flow and accelerate its descent, reducing sediment retention. The middle layer is a permeable framework layer, using graded natural sand with a particle size of 2 mm to 5 mm as the main aggregate, maintaining an aggregate ratio of 70% to 75%, mixed with cement. The permeable framework layer has through holes, each with a diameter of 3 mm to 5 mm. The corresponding conical drainage channels and through holes are coaxial and connected, with all hole axes perpendicular to the bottom surface of the brick, ensuring the shortest water flow path under gravity. The bottom layer is a high-grade natural sand permeable paving brick base. Using recycled construction waste aggregate with a particle size of 5 mm to 8 mm as the main raw material, the aggregate content reaches 60%, with the remainder being cement and admixtures. Basalt fiber, accounting for 0.5% of the concrete mass, is specially added, with a fiber length controlled between 6 mm and 12 mm, effectively improving freeze-thaw resistance. Before use, the recycled aggregate undergoes strengthening treatment: first, magnetic separation removes metallic impurities, then a wheel mill is used to shape and improve particle geometry. Through a combination of through-holes and conical drainage channels, dual-effect permeability of siphon and scouring is achieved. When water flows through the high-grade permeable paving brick surface layer, the conical... The drainage channel increases the flow velocity, generating negative pressure suction. When the water flow is large, a high-speed jet forms in the channel to wash away the sediment. The brick body has a regular hexagonal structure, and its sidewalls are formed by three arc-shaped male tenons and three arc-shaped female tenons alternating to form a petal-like outline. When the bricks are laid, they are arranged in a honeycomb pattern. The corresponding arc-shaped male tenons and arc-shaped female tenons form an interlocking structure. The curved joints can automatically level the angle. The interlocking surfaces of the arc-shaped male tenons and arc-shaped female tenons result in high shear strength. The interlocking structure increases the effective permeable joint width and improves the permeability efficiency. The drainage channel in the interlocking area can form a dual drainage channel with the vertical hole infiltration. Attached Figure Description

[0015] Figure 1 A three-dimensional image of a high-quality permeable paving brick made of natural sand;

[0016] Figure 2 A schematic diagram of the bottom structure of a high-quality permeable paving brick made of natural sand;

[0017] Figure 3 This is a cross-sectional structural diagram of a high-quality permeable paving brick made of natural sand.

[0018] Figure 4 This is a schematic diagram of the surface layer of a high-grade permeable sand paving brick.

[0019] Figure 5 This is a schematic diagram of the permeable skeleton layer in a high-quality natural sand permeable paving brick.

[0020] In the diagram: 1. Permeable skeleton layer; 2. High-quality natural sand permeable paving brick bottom layer; 3. High-quality natural sand permeable paving brick top layer; 4. Conical drainage groove; 5. Through hole; 6. Arc-shaped male tenon; 7. Arc-shaped female tenon. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5In this embodiment of the utility model, a high-grade permeable paving brick made of natural sand includes a permeable skeleton layer 1. The permeable skeleton layer 1 has a bottom layer 2 of high-grade permeable paving brick at its bottom and a top layer 3 of high-grade permeable paving brick at its top. The top layer 3 has a conical drainage groove 4 inside and a through hole 5 inside. The permeable skeleton layer 1 is hexagonal. Three arc-shaped male tenons 6 are provided on the outer side of the permeable skeleton layer 1, and three arc-shaped female tenons 7 are provided on the outer wall of the permeable skeleton layer 1. The conical drainage groove 4 guides the water flow, accelerating its descent and reducing sediment retention. The through hole 5 is a cylindrical channel with a diameter of 4 mm. The spacing is maintained at 10 mm, and the axis is perpendicular to the bottom plane of the brick. The middle layer is a permeable skeleton layer 1, which uses graded natural sand with a particle size of 2 mm to 5 mm as the main aggregate, maintaining the aggregate ratio at 70% to 75%. It is mixed with cement. Through holes 5 are formed in the permeable skeleton layer 1, each with a diameter of 3 mm to 5 mm. The corresponding conical drainage channels 4 and the through holes 5 are coaxial and connected. All channel axes are perpendicular to the bottom surface of the brick, ensuring the shortest water flow path under gravity. The middle layer is a permeable skeleton layer 1, which uses graded natural sand with a particle size of 2 mm to 5 mm as the main aggregate, maintaining the aggregate ratio at 70% to 75%. It is mixed with cement. Through holes 5 are formed in the permeable skeleton layer 1, each with a diameter of 3 mm to 5 mm. The diameter of the drainage channel is 3 mm to 5 mm. The corresponding conical drainage channel 4 and the through hole 5 are coaxial and connected. The axis of all the channels is perpendicular to the bottom surface of the brick body, which can ensure the shortest water flow path under gravity. The bottom layer is the high-grade natural sand permeable paving brick bottom layer 2. This layer uses recycled construction waste aggregate with a particle size of 5 mm to 8 mm as the main raw material, with an aggregate content of 60%. The rest is cement and admixtures. Basalt fiber, accounting for 0.5% of the concrete mass, is specially added. The fiber length is controlled between 6 mm and 12 mm to effectively improve the freeze-thaw resistance. The recycled aggregate needs to be strengthened before use. The conical drainage channel 4 is an inverted truncated cone structure with an upper diameter of 2 mm, a lower diameter of 4 mm, and a channel depth ranging from 4 mm to 6 mm. High-grade natural sand permeable paving brick surface layer 3 is composed of modified natural sand aggregate, with the surface of the aggregate coated with a silane coupling agent treatment layer. The bottom layer 2 of the high-grade natural sand permeable paving brick contains recycled aggregate from construction waste. Basalt short-cut fibers accounting for 0.5% of the concrete mass are added to the bottom layer 2 of the high-grade natural sand permeable paving brick. The mixture of the surface layer 3 of the high-grade natural sand permeable paving brick contains nano hydrophobic agents. The recycled aggregate needs to be strengthened before use: first, it is magnetically separated to remove metal impurities, and then it is shaped by a wheel grinder to improve the geometric characteristics of the particles. Through the combination structure of the through hole 5 and the conical drainage channel 4, the dual-effect permeability of siphon and flushing is achieved. When water flows through the surface layer 3 of the high-grade natural sand permeable paving brick, the conical drainage channel 4 increases the flow velocity and generates negative pressure suction. When the water flow is large, a high-speed jet is formed in the channel to flush the sediment.

[0023] The working principle of this utility model is as follows: The top layer is a high-grade permeable paving brick surface layer 3, which is composed of modified natural sand as the main aggregate, combined with an inorganic nano-hydrophobic agent. The natural sand needs to undergo special modification treatment: first, it is soaked in a 3% hydrochloric acid solution for two hours to remove surface impurities, then it is sprayed with a silane coupling agent, and finally dried at 80 degrees Celsius. The modified natural sand has improved adhesion to cement. The nano-hydrophobic agent is preferably silica particles modified with a silane coupling agent, which can form a micro-hydrophobic film in situ during cement hydration, achieving efficient drainage and anti-fouling functions. The high-grade natural sand is permeable. The pavement brick surface layer 3 is equipped with conical drainage channels 4, which guide the water flow to accelerate its descent and reduce sediment retention. The middle layer is a permeable skeleton layer 1, which uses graded natural sand with a particle size of 2 mm to 5 mm as the main aggregate, maintaining an aggregate ratio of 70% to 75%, and is mixed with cement. The permeable skeleton layer 1 has through holes 5, each with a diameter of 3 mm to 5 mm. The corresponding conical drainage channels 4 and through holes 5 are coaxial and connected, and the axis of all channels is perpendicular to the bottom surface of the brick body, which can ensure the shortest water flow path under gravity. The bottom layer is a high-grade natural sand permeable pavement brick. The bottom layer 2 primarily uses recycled construction waste aggregate with a particle size of 5 to 8 mm as its main raw material, accounting for 60% of the total aggregate content. The remainder consists of cement and admixtures, with basalt fiber accounting for 0.5% of the concrete mass. The fiber length is controlled between 6 and 12 mm to effectively improve freeze-thaw resistance. Before use, the recycled aggregate undergoes a strengthening treatment: first, it is magnetically separated to remove metallic impurities, and then shaped using a wheel grinder to improve the particle geometry. Through the combined structure of through holes 5 and conical drainage channels 4, dual-effect permeability of siphon and scouring is achieved. When water flows through the high-grade permeable paving brick surface layer 3, the conical drainage channel... The shaped drainage channel 4 increases the flow velocity and generates negative pressure suction. When the water flow is large, a high-speed jet is formed in the channel to wash away the sediment. The brick body has a regular hexagonal structure, and its side wall is formed by three arc-shaped male tenons 6 and three arc-shaped female tenons 7 alternately to form a petal-shaped outline. When the brick body is laid, it is arranged in a honeycomb pattern. The corresponding arc-shaped male tenons 6 and arc-shaped female tenons 7 form an interlocking structure. The curved joint can automatically level the angle. The interlocking surface of the arc-shaped male tenons 6 and arc-shaped female tenons 7 makes the shear strength high. The interlocking structure increases the effective permeable joint width and improves the permeability efficiency. The drainage channel in the interlocking area can form a double drainage channel with the infiltration of the vertical hole 5.

[0024] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A high-quality permeable paving brick, comprising a permeable skeleton layer (1), characterized in that, The bottom of the permeable skeleton layer (1) is provided with a high-quality permeable paving brick bottom layer (2), the top of the permeable skeleton layer (1) is provided with a high-quality permeable paving brick top layer (3), the interior of the high-quality permeable paving brick top layer (3) is provided with a conical drainage groove (4), the interior of the permeable skeleton layer (1) is provided with a through hole (5), the permeable skeleton layer (1) is a regular hexagon, the outer side of the permeable skeleton layer (1) is provided with three arc-shaped male tenons (6), and the outer wall of the permeable skeleton layer (1) is provided with three arc-shaped female tenons (7).

2. The high-quality permeable paving brick according to claim 1, characterized in that, The through holes (5) are arranged in an array within the permeable skeleton layer (1), and the outer surface of the high-grade sand permeable pavement brick surface layer (3) is provided with a conical drainage groove (4) that is coaxially connected with the through holes (5).

3. The high-quality permeable paving brick according to claim 1, characterized in that, The through hole (5) is a cylindrical channel with a diameter of 4 mm, the spacing between the holes is kept at 10 mm, and the axis is perpendicular to the bottom plane of the brick.

4. The high-quality permeable paving brick according to claim 1, characterized in that, The conical drainage channel (4) has an inverted truncated cone structure with an upper diameter of 2 mm, a lower diameter of 4 mm, and a channel depth ranging from 4 mm to 6 mm.

5. The high-quality permeable paving brick according to claim 1, characterized in that, The high-quality natural sand permeable pavement brick surface layer (3) is composed of modified natural sand aggregate, and the surface of the aggregate is coated with a silane coupling agent treatment layer.

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