Recycled concrete slope protection brick and manufacturing method thereof

Abstract

The invention discloses a recycled concrete slope protection brick, and belongs to the technical field of slope protection bricks, the recycled concrete slope protection brick comprises a brick body, the brick body is formed by pressing and curing a recycled concrete raw material, a permeable vegetation structure is integrally formed on the brick body, the permeable vegetation structure comprises a first planting cavity and a second planting cavity, and a vegetation card is poured on one inner wall of the permeable vegetation structure; a receding groove is formed in the position, corresponding to the vegetation clamp, of the lower surface of the brick body, the lower end of the vegetation clamp extends into the receding groove, and the inner wall, opposite to the vegetation clamp, of the water-permeable vegetation structure is designed to be of a downwards-concave inclined face structure. The recycled coarse aggregate and the recycled fine aggregate which are prepared by crushing and screening construction waste are adopted as main raw materials, a large amount of construction solid waste can be consumed, natural gravel exploitation is reduced, energy consumption and environmental pollution are reduced, a large-volume water-permeable vegetation structure is integrated in the brick body, rapid infiltration of rainwater can be achieved, the elastic vegetation cards are embedded in the brick body, and the brick body can be recycled. When vegetation is planted, the vegetation can be automatically and elastically clamped, and the vegetation is prevented from being washed off by rainwater or water flow.

Description

Technical Field

[0001] This invention belongs to the field of slope protection brick technology, specifically relating to a recycled concrete slope protection brick and its manufacturing method. Background Technology

[0002] Ecological slope protection is an important technical field in road, water conservancy and municipal engineering. Using construction waste to prepare recycled concrete slope protection bricks can effectively realize the resource utilization of solid waste and has significant economic and environmental benefits.

[0003] In the prior art, CN105693151A discloses a recycled sea sand concrete slope protection brick, which uses recycled aggregate and sea sand to prepare the slope protection brick body, realizing the application of recycled aggregate to a certain extent. However, traditional recycled concrete slope protection bricks generally have the following problems: the utilization rate of recycled aggregate is low, and the density, strength and erosion resistance of the brick body are difficult to meet the requirements of long-term slope protection; the vegetation structure is simple, lacking reliable vegetation fixation and water retention structures, resulting in low vegetation survival rate; the bricks are simply overlapped, resulting in poor overall stability and easy slippage and collapse; and the functional structure and production process are poorly compatible, leading to high construction and maintenance costs.

[0004] Therefore, it is necessary to provide a recycled concrete slope protection brick with high utilization rate, stable structure, good ecological vegetation effect and convenient construction, as well as its manufacturing method, to solve the shortcomings of the existing technology. Summary of the Invention

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0006] To address the problems mentioned in the background section, the present invention adopts the following technical solution.

[0007] A recycled concrete slope protection brick includes a brick body, which is formed by pressing and curing recycled concrete raw materials. Recycled concrete raw materials, by weight, include: 15-30 parts cement; 30-60 parts of recycled coarse aggregate; 20-45 parts of recycled fine aggregate; 3-8 parts silica fume; Water-reducing agent: 0.3–1.2 parts; 8-16 parts water; The brick body is integrally formed with a permeable planting structure, which includes a first planting cavity and a second planting cavity. A planter is cast on one of the inner walls of the permeable planting structure. A clearance groove is opened on the lower surface of the brick body corresponding to the planter. The lower end of the planter extends into the clearance groove. The inner wall of the permeable planting structure opposite to the planter is designed as a downward concave sloping structure.

[0008] Preferably, the brick body is integrally formed with an interlocking structure, and the interlocking structure includes an interlocking part, a protrusion part and a tenon part. The interlocking part is a groove structure on one side of the brick body, the tenon part is a tenon structure on the other side of the brick body that is gap-fitted with the interlocking part, and the protrusion part is adapted to fit and engage with the clearance groove of the adjacent brick body to realize the longitudinal and transverse bidirectional interlocking positioning of the brick body.

[0009] Preferably, the vegetation card is an elastic metal structure. When the slope protection vegetation or turf is inserted into the planting cavity, the vegetation card is squeezed to produce elastic deformation. Its lower section is embedded in the relief groove to form relief. After being reset, the vegetation card squeezes and fixes the slope protection vegetation inside the planting cavity.

[0010] Preferably, permeable holes are provided on both sides of the brick body, extending through the thickness direction. The permeable holes are connected to the first planting cavity and the second planting cavity, and the permeable holes are oblique holes with rough surfaces on the hole walls.

[0011] Preferably, the combined volume of the first implantation cavity and the second implantation cavity accounts for 45% to 50% of the total volume of the brick.

[0012] Preferably, the recycled coarse aggregate is obtained from the crushing and screening of construction waste, with a particle size of 5-20 mm, and the recycled fine aggregate has a particle size of 0.15-5 mm, with a total replacement rate of ≥60% for the recycled coarse and fine aggregates.

[0013] According to the above scheme, this application also provides a method for manufacturing recycled concrete slope protection bricks, which includes the following steps: S1. Construction waste processing to produce recycled coarse and fine aggregates, which are then dried for later use; S2. Weigh the raw materials according to their weight and mix them thoroughly. S3. Add metered water and mix wet to obtain concrete mixture; S4. Pre-fix the vegetation card 107 into the mold, inject the mixture, and vibrate and press to form it. S5. After demolding, standard curing is performed to obtain recycled concrete slope protection bricks.

[0014] Preferably, the dry mixing time in S2 is 60-120s, the wet mixing time in S3 is 90-180s, and the slump of the resulting concrete mixture is controlled at 30-70mm.

[0015] Preferably, the mold in S4 has cavities that match the fitting part, the protrusion, the tenon part, the first implantation cavity, the second implantation cavity, and the relief groove. The process parameters for vibration and pressurization are: molding pressure 15-30MPa, vibration frequency 50-60Hz, and holding time 10-30s.

[0016] Preferably, the standard curing regime in S5 is as follows: the green body is left to stand at room temperature for 24 hours before being demolded, and then cured by water spraying at room temperature for ≥7 days, or by steam curing for 4 to 8 hours.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention uses recycled coarse aggregate and recycled fine aggregate prepared by crushing and screening construction waste as the main raw materials, which can consume a large amount of construction solid waste, reduce the mining of natural sand and gravel, reduce energy consumption and environmental pollution, and has significant environmental and social benefits. At the same time, by optimizing the mix ratio and rationally adding silica fume and high-efficiency water-reducing agent, the interface transition zone of recycled concrete is effectively improved, and the density, compressive strength and erosion resistance of bricks are enhanced. Combined with high-pressure vibration molding process, the overall structure of the slope protection bricks is uniform and durable, and can adapt to complex and harsh environments such as river channels and road slopes for a long time. It has a long service life and low maintenance cost, and truly realizes the organic unity of solid waste resource utilization and high-performance structural materials.

[0018] (2) The present invention integrates a large-volume permeable vegetation structure inside the brick body. The total volume of the first planting cavity and the second planting cavity accounts for 45% to 50%. With the help of the inclined through-type permeable holes, rainwater can be quickly infiltrated, reasonably stored and slowly released, which significantly reduces the erosion of the slope runoff and improves the soil and water conservation capacity. The inner wall of the planting cavity adopts a downward concave inclined structure, which is conducive to soil storage, water retention and water conduction, providing good conditions for the growth of vegetation roots. The elastic vegetation clips are pre-embedded inside the brick body, which can automatically and elastically clamp when the vegetation is planted to prevent the vegetation from being washed away by rainwater or water flow, greatly improving the survival rate of vegetation. It can quickly realize multiple functions of slope greening, soil stabilization and slope protection, ecological restoration and landscape beautification, with significant ecological benefits.

[0019] (3) The brick body of this invention adopts a longitudinal and transverse two-way interlocking structure formed by the combination of interlocking parts, protrusions and tenons. Adjacent bricks can achieve precise interlocking and two-way positioning, which effectively improves the integrity, anti-slip ability and anti-overturning ability of the slope protection system, and avoids problems such as loosening, misalignment and collapse of the slope under soil pressure, water flow impact and long-term load. The brick body is integrally pressed and formed, with high structural strength and good dimensional accuracy. No complex auxiliary components are required during laying. The construction is simple, the positioning is quick and efficient. It is suitable for large-scale mechanized laying and engineering promotion and application, which greatly reduces the construction difficulty and engineering cost, and improves the overall safety and stability of the slope protection project. Attached Figure Description

[0020] Figure 1 This is a structural diagram of the recycled concrete slope protection bricks used in this invention.

[0021] Figure 2 This is a cross-sectional view of the recycled concrete slope protection bricks in this invention. Figure 1 .

[0022] Figure 3 This is a cross-sectional view of the recycled concrete slope protection bricks in this invention. Figure 2 .

[0023] Figure 4 This is a plan view of the recycled concrete slope protection bricks used in this invention.

[0024] Figure 5 This is a schematic diagram of the laying of recycled concrete slope protection bricks in this invention.

[0025] Figure 6 This is a plan view showing the effect of laying recycled concrete slope protection bricks according to the present invention.

[0026] The correspondence between the labels and component names in the attached figures is as follows: 100. Brick body; 101. First planting cavity; 102. Second planting cavity; 103. Fitting part; 104. Protrusion part; 105. Mortise and tenon part; 106. Relief groove; 107. Vegetation card. Detailed Implementation

[0027] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments. The present invention provides the following embodiments.

[0030] Example 1 This embodiment provides a recycled concrete slope protection brick, which is mainly used in river slopes, roadbed slopes, municipal garden landscape slopes, and soil and water conservation projects. It can realize the resource utilization of construction waste while completing multiple functions such as slope protection, soil and water conservation, ecological vegetation and landscape beautification. It solves the technical problems of traditional slope protection bricks such as insufficient strength, low utilization rate of recycled aggregates, poor vegetation fixation effect, weak overall stability and high construction difficulty.

[0031] See Figure 1 This is a structural diagram of a recycled concrete slope protection brick according to this embodiment. The recycled concrete slope protection brick includes a brick body 100. The brick body 100 is made of recycled concrete raw materials, which is pressed under high pressure and cured. The overall structure is uniform and dense, with stable mechanical properties. It can adapt to the working conditions of slope being subjected to long-term water flow erosion, soil lateral pressure and natural environmental erosion. The brick body 100 adopts an integral molding process, without weak parts such as splicing and bonding. The overall structure has high strength and good durability, which can effectively extend the service life of the slope protection structure and reduce the later maintenance cost.

[0032] The recycled concrete raw materials in this embodiment, by weight, include: 15-30 parts cement; 30-60 parts recycled coarse aggregate; 20-45 parts recycled fine aggregate; 3-8 parts silica fume; 0.3-1.2 parts water-reducing agent; and 8-16 parts water. The above raw material ratio has been optimized through extensive testing, significantly improving the density, strength, impermeability, and freeze-thaw resistance of concrete while ensuring high utilization of recycled aggregate. Cement, as a cementing material, provides the basic strength and bonding performance for the entire brickwork. The cement content is controlled within a reasonable range to ensure strength. To meet demand while avoiding increased costs and the risk of shrinkage cracking due to excessive cementitious materials, recycled coarse and fine aggregates are processed from demolition waste through crushing, screening, washing, and drying. This process effectively utilizes large quantities of construction solid waste, reduces the mining of natural sand and gravel, and offers significant environmental and economic benefits. The particle size of recycled coarse aggregate is controlled between 5 and 20 mm, and that of recycled fine aggregate between 0.15 and 5 mm, with a continuous and reasonable gradation. This effectively increases the bulk density of the brick, reduces internal voids, and improves the mechanical properties and durability of the brick. The total replacement rate of recycled coarse and fine aggregates is no less than 60%, far exceeding the aggregate replacement rate of conventional recycled concrete components, truly achieving efficient resource utilization of construction waste.

[0033] Furthermore, silica fume, as an active mineral admixture, can significantly improve the interfacial transition zone structure of recycled concrete, fill the pores on the surface of recycled aggregate, and improve the density, compressive strength, and erosion resistance of the bricks. At the same time, it enhances the durability of concrete, reduces water absorption, and reduces erosion damage caused by external moisture and harmful substances penetrating into the brick interior. The water-reducing agent uses a high-efficiency polycarboxylate-based water-reducing agent with low dosage and high water reduction rate. It can ensure good workability of the concrete mixture under low water-cement ratio conditions, making it easy to vibrate and pressurize for molding, further improving the density and strength of the bricks. The amount of water is strictly controlled at 8-16 parts, which, together with the water-reducing agent, achieves low water-cement ratio molding, ensuring high brick strength, small drying shrinkage deformation, and dimensional stability.

[0034] See Figure 1 In this embodiment, the brick body 100 is integrally formed with a permeable vegetation structure, which includes a first planting cavity 101 and a second planting cavity 102. The first planting cavity 101 and the second planting cavity 102 are rationally distributed within the brick body 100, ensuring both the structural strength of the brick body and providing ample space for vegetation growth. The combined volume of the first planting cavity 101 and the second planting cavity 102 accounts for 45% to 50% of the total volume of the brick body 100. This larger vegetation space can accommodate more planting soil, improving water and fertilizer retention capacity, providing favorable conditions for root growth, and promoting rapid root establishment and growth of herbaceous plants and shrub seedlings, thus achieving rapid slope revegetation. See Figure 2 and Figure 3 In this embodiment, a vegetation clip 107 is cast and fixed on one of the inner walls of the permeable vegetation structure. The vegetation clip 107 is pre-embedded in the mold during the brick forming process and is cast as a whole with the brick 100, with a firm and reliable connection. It will not fall off or loosen during use. A relief groove 106 is opened on the lower surface of the brick 100 corresponding to the position of the vegetation clip 107. The lower end of the vegetation clip 107 extends into the relief groove 106. The relief groove 106 provides elastic deformation space for the vegetation clip 107, ensuring that the vegetation clip 107 can play a normal clamping and fixing role. Furthermore, the inner wall of the permeable vegetation structure opposite to the vegetation clip 107 adopts a concave slope structure. When the slope protection brick is laid on the slope, the slope can form an inward angle of less than 90° with the slope, forming a top-to-bottom tapering structure. During rainfall or slope runoff, the slope can effectively block and retain the planting soil and silt in the planting cavity, reduce the scouring force of water flow, reduce the risk of soil erosion, and at the same time, it can accumulate water and silt inside the planting cavity, improve the ability to retain soil, water and fertilizer, provide a stable growth environment for the vegetation roots, and further improve the survival rate of vegetation and the ecological protection effect of the slope.

[0035] Continue reading Figure 3In this embodiment, the vegetation clip 107 is made of an elastic metal structure, which has good elastic deformation and recovery capabilities, as well as excellent corrosion resistance. It can adapt to complex environments such as damp slopes and acidic / alkaline conditions, and will not rust or break after long-term use. When the slope protection vegetation is inserted into the first planting cavity 101 and the second planting cavity 102, since the slope protection vegetation is planted in a cultivation dish, the roots and planting soil form a soil mound. The soil mound will squeeze the vegetation clip 107, causing the vegetation clip 107 to undergo elastic deformation. Its lower section bends and embeds itself into the relief groove 106 to achieve the relief function, which facilitates the smooth implantation of the vegetation into the planting cavity. After the vegetation is implanted, the vegetation clip 107 resets under its own elasticity and squeezes and fixes the slope protection vegetation inside the planting cavity from the side, firmly restricting the vegetation inside the planting cavity. This prevents the vegetation from being pulled out or washed away by rain, water flow, and wind, greatly improving the reliability of vegetation fixation and survival rate.

[0036] See Figure 1 , Figure 5 and Figure 6 In this embodiment, the brick body 100 is integrally formed with an interlocking structure, which includes an interlocking part 103, a protrusion 104, and a tenon part 105. The interlocking part 103 is a groove structure on one side of the brick body 100, and the tenon part 105 is a tenon structure on the other side of the brick body 100 that fits with the interlocking part 103 with a gap. Adjacent brick bodies 100 are interlocked with each other through the interlocking part 103 and the tenon part 105 to achieve lateral interlocking positioning and restrict lateral displacement between brick bodies. The protrusion 104 is provided on the surface of the brick body 100 and is adapted to the shape of the relief groove 106 at the bottom of the adjacent brick body 100 and interlocks with each other to achieve longitudinal interlocking positioning. Through the cooperation of the interlocking part 103, the protrusion part 104 and the tenon part 105, the bricks 100 can be mutually locked in both longitudinal and transverse directions, so that multiple slope protection bricks can be spliced ​​together to form a stable overall structural system. This improves the slope protection structure's resistance to sliding, overturning and overall stability, and avoids problems such as brick misalignment, collapse and loosening under soil deformation and water erosion, ensuring the long-term safety and stability of the slope. Furthermore, permeable holes are opened on both sides of the brick 100 along the thickness direction. The permeable holes are connected to the first planting cavity 101 and the second planting cavity 102, which can realize the rapid infiltration of rainwater and slope water, reduce the erosion of the soil by slope runoff and improve the soil and water conservation effect. The permeable holes adopt an inclined hole design, which can extend the water infiltration path, improve water storage capacity, and at the same time prevent silt from quickly clogging the permeable holes, ensuring long-term water permeability. The hole walls of the permeable holes have rough surfaces, which can increase the adhesion between water and the hole walls and improve water retention performance.

[0037] In summary, the recycled concrete slope protection bricks of this embodiment integrate multiple functions such as high solid waste utilization rate, high strength, high durability, permeable vegetation, automatic vegetation clamping, and longitudinal and transverse interlocking. The structural design is scientific and reasonable, and the ecological, economic and social benefits are outstanding. It can be widely used in various slope ecological protection projects.

[0038] Example 2 This embodiment provides a method for manufacturing recycled concrete slope protection bricks, specifically for manufacturing recycled concrete slope protection bricks with the above-mentioned structure. This manufacturing method has stable process, strong controllability, and high production efficiency, and can ensure product dimensional accuracy, structural integrity, and performance uniformity, making it suitable for industrialized and large-scale production.

[0039] The first step is to process construction waste, which involves classifying and removing solid waste materials such as concrete blocks, bricks, and gravel generated during the demolition process. Impurities such as steel bars, wood blocks, plastics, and glass are removed to prevent them from affecting the performance of recycled aggregates and the quality of bricks. After the impurities are removed, multi-stage crushing is carried out using specialized crushing equipment, and then the recycled coarse aggregate and recycled fine aggregate are screened out separately by screening equipment to ensure continuous aggregate gradation and uniform particle size. The recycled coarse aggregate and recycled fine aggregate were dried separately to control the moisture content of the aggregate within the set range, so as to avoid the fluctuation of moisture content affecting the concrete mix proportion and workability of the mixture. After drying, they were sealed and stored for later use to prevent moisture and secondary pollution. Weigh out the raw materials such as cement, recycled coarse aggregate, recycled fine aggregate, silica fume, and water-reducing agent according to their weight proportions, and put them into a forced mixer for dry mixing. The dry mixing time should be controlled between 60 and 120 seconds. The dry mixing process can ensure that the solid raw materials are fully and evenly mixed, avoiding the phenomenon of local material concentration and uneven distribution, and laying a good foundation for subsequent wet mixing. If the dry mixing time is too short, the mixing will be insufficient, affecting the uniformity of brick performance. If the dry mixing time is too long, the production efficiency will be reduced and the energy consumption will be increased. Therefore, the dry mixing time should be controlled within a reasonable range to ensure a balance between mixing effect and production efficiency. After dry mixing, add the measured water to the mixer and continue wet mixing. The wet mixing time is controlled between 90 and 180 seconds to ensure that the solid raw materials and water are fully in contact and evenly dispersed, forming a concrete mixture with moderate fluidity and uniform stability. During the wet mixing process, strictly control the mixing speed and mixing time to ensure that the cementitious materials are fully hydrated and the aggregate surface is completely coated with the paste, thereby improving the workability and molding performance of the mixture. The slump of the resulting concrete mixture is controlled between 30 and 70 mm. This slump range is suitable for the vibration pressure molding process, which can ensure that the mixture can smoothly fill the mold cavity under pressure, expel internal air, make the brick structure dense, and avoid defects such as holes, looseness, and chipped edges. The pre-prepared vegetation card 107 is precisely pre-fixed inside the mold according to the designed position, ensuring that the vegetation card 107 does not shift or tilt during the pouring and vibration pressurization process, thus ensuring the structural accuracy of the product. The mold is made of high-strength steel, and its interior has cavities that match the structural shapes of the brick body 100, such as the fitting part 103, protrusion 104, tenon part 105, first planting cavity 101, second planting cavity 102, and relief groove 106. The cavity dimensions are precise and the surface is smooth, ensuring the integrity of the brick structure, accurate dimensions, and excellent appearance quality. The prepared concrete mixture is evenly poured into the mold, and the amount of material added is controlled to ensure that the thickness and density of the brick are uniform. After feeding, a vibration and pressure molding process is carried out. The vibration and pressure molding process parameters are: molding pressure 15-30 MPa, vibration frequency 50-60 Hz, and holding time 10-30 s. Vibration effectively removes air from the mixture, further compacting and filling the cavity. Pressure compresses the concrete particles, significantly reducing the internal porosity of the brick, improving strength and density. The holding time ensures sufficient pressure transmission, allowing even complex structural parts to be molded densely, avoiding rebound and internal defects. By precisely controlling the vibration frequency, molding pressure, and holding time, the performance and quality of each slope protection brick can be guaranteed to be stable and consistent. After molding, a standard curing process is performed. First, the mold containing the green body is placed at room temperature and left to stand for 24 hours to allow the green body to initially harden and reach demolding strength, preventing damage or deformation during demolding. After standing, the demolding operation is carried out gently and smoothly to protect the appearance and structural integrity of the green body. The demolded green body is then cured using a standard curing system. One method is room temperature water spraying curing, with a curing time of no less than 7 days. During the water spraying process, the surface of the green body is kept moist for a long time to provide sufficient moisture for the hydration of the cementitious material, so that the brick strength continues to increase and the performance is steadily improved. The other method is steam curing, with the steam curing time controlled at 4 to 8 hours. By reasonably controlling the temperature and humidity, the hydration reaction rate is accelerated, the curing cycle is shortened, and the production efficiency is improved, making it suitable for mass production. After curing, finished recycled concrete slope protection bricks are obtained. These bricks undergo appearance, dimensional, and performance inspections, and only those that pass are released for use. This production method, through comprehensive optimization of construction waste treatment, raw material proportioning, mixing process, vibration and pressurization parameters, and curing regime, achieves stable production of high-performance slope protection bricks with high recycled aggregate content. The products combine structural strength, ecological function, and ease of construction, effectively solving many problems existing in current technologies and possessing broad engineering application prospects.

[0040] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted herein.

Claims

1. A recycled concrete slope protection brick, comprising a brick body (100), characterized in that, The brick (100) is formed by pressing and curing recycled concrete raw materials; The recycled concrete raw materials, by weight, comprise: 15-30 parts cement; 30-60 parts of recycled coarse aggregate; 20-45 parts of recycled fine aggregate; 3-8 parts silica fume; Water-reducing agent: 0.3–1.2 parts; 8-16 parts water; The brick body (100) is integrally formed with a permeable planting structure. The permeable planting structure includes a first planting cavity (101) and a second planting cavity (102). A plant card (107) is cast on one of the inner walls of the permeable planting structure. A relief groove (106) is opened on the lower surface of the brick body (100) corresponding to the plant card (107). The lower end of the plant card (107) extends into the relief groove (106). The inner wall of the permeable planting structure opposite to the plant card (107) is designed as a downward concave inclined surface structure.

2. The recycled concrete slope protection brick according to claim 1, characterized in that: The brick body (100) is integrally formed with an interlocking structure, and the interlocking structure includes an interlocking part (103), a protrusion (104) and a tenon part (105). The interlocking part (103) is a groove structure on one side of the brick body (100), and the tenon part (105) is a tenon structure on the other side of the brick body (100) that is gap-fitted with the interlocking part (103). The protrusion (104) is adapted to fit and engage with the clearance groove (106) of the adjacent brick body, so as to realize the longitudinal and transverse two-way interlocking positioning of the brick body (100).

3. The recycled concrete slope protection brick according to claim 1, characterized in that: The vegetation card (107) is an elastic metal structure. When the slope protection vegetation or turf is inserted into the planting cavity, the vegetation card (107) is squeezed to produce elastic deformation. Its lower section is embedded in the relief groove (106) to form relief. After being reset, the vegetation card (107) squeezes and fixes the slope protection vegetation inside the planting cavity.

4. The recycled concrete slope protection brick according to claim 1, characterized in that: The brick body (100) has water-permeable holes on both sides that extend through the thickness direction. The water-permeable holes are connected to the first planting cavity (101) and the second planting cavity (102). The water-permeable holes are oblique holes with rough surfaces on the hole walls.

5. The recycled concrete slope protection brick according to claim 1, characterized in that: The combined volume of the first implantation cavity (101) and the second implantation cavity (102) accounts for 45% to 50% of the total volume of the brick body (100).

6. The recycled concrete slope protection brick according to claim 1, characterized in that: The recycled coarse aggregate is obtained from the crushing and screening of construction waste, with a particle size of 5-20 mm, and the recycled fine aggregate has a particle size of 0.15-5 mm. The total replacement rate of recycled coarse and fine aggregate is ≥60%.

7. A method for producing recycled concrete slope protection bricks as described in any one of claims 1 to 6, characterized in that, Includes the following steps: S1. Construction waste processing to produce recycled coarse and fine aggregates, which are then dried for later use; S2. Weigh the raw materials according to their weight and mix them thoroughly. S3. Add metered water and mix wet to obtain concrete mixture; S4. The vegetation card (107) is pre-fixed in the mold, and the mixture is injected and vibrated and pressed to form the shape; S5. After demolding, standard curing is performed to obtain recycled concrete slope protection bricks.

8. The method for producing recycled concrete slope protection bricks according to claim 7, characterized in that, The dry mixing time in S2 is 60-120s, and the wet mixing time in S3 is 90-180s. The slump of the resulting concrete mixture is controlled at 30-70mm.

9. The method for producing recycled concrete slope protection bricks according to claim 7, characterized in that, The mold in S4 has cavities that match the fitting part (103), the protrusion (104), the tenon part (105), the first implantation cavity (101), the second implantation cavity (102), and the relief groove (106). The vibration pressurization process parameters are: molding pressure 15-30MPa, vibration frequency 50-60Hz, and holding time 10-30s.

10. The method for producing recycled concrete slope protection bricks according to claim 7, characterized in that, The standard curing regime in S5 is as follows: the green body is left to stand at room temperature for 24 hours before being demolded, and then cured by water spraying at room temperature for ≥7 days, or by steam curing for 4 to 8 hours.

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