A precast precast eco-friendly concrete slab with FRP grating and its preparation method

Abstract

This invention discloses a precast, pre-planted ecological concrete slab with FRP (fiberglass reinforced plastic) grating and its preparation method. The slab includes an ecological concrete block, with a crushed stone concrete surface layer block on top. The crushed stone concrete surface layer block has several upper grooves within the concrete surface layer. An FRP grating is installed inside the ecological concrete block. By precasting the ecological concrete blocks in a factory, on-site work is significantly reduced, requiring less on-site technical expertise. Factory precasting technology and quality control are excellent, allowing for strict control over parameters such as the shape, size, and thickness of the test blocks. Seeds are pre-planted into the soil within the pores of the test specimen. After the specimen is hoisted and placed on-site, sufficient moisture is provided to the soil to allow the seeds to germinate and grow, eliminating the need for manual sowing. The factory's mechanical operation ensures that various substrates required for plant growth are evenly filled into the pores.

Description

Technical Field

[0001] This invention relates to the technical field of road paving and slope protection, specifically to a precast pre-installed ecological concrete slab with FRP grid and its preparation method. Background Technology

[0002] With the widespread adoption of concrete globally, it has become the world's most widely used and consumed building material, applied extensively in various construction fields such as building engineering, road engineering, bridge engineering, and water conservancy projects. Driven by environmental protection concerns, vegetated concrete has emerged and is rapidly developing globally. Its porous structure, formed by the absence of fine aggregates, provides excellent permeability and air permeability, facilitating the infiltration, retention, purification, and drainage of surface water. This aligns with the concept of "sponge cities," enabling cities to "resiliently" respond to environmental changes and natural disasters, while simultaneously achieving a greening effect, demonstrating promising prospects in urban ecological construction. However, the preparation and molding processes of vegetated concrete differ from ordinary concrete. The single-size coarse aggregates must be fully coated by the slurry, and sedimentation must be avoided during molding to prevent bottom sedimentation from clogging the pores. Numerous requirements indicate that the preparation of vegetated concrete demands high-level on-site construction techniques. However, on-site construction is complex and conditions are limited, making it uncertain whether the vegetated concrete can be prepared properly to achieve the desired effect. The vegetated concrete system mainly consists of a porous concrete layer, planting substrate, topsoil, and grass seeds. After the concrete layer is poured and cured to the specified age, the planting substrate is filled into the pores, covered with topsoil, and then grass seeds are sown. If on-site construction is used, the planting substrate filling process requires a large amount of manual labor, and the quality of pore filling cannot be guaranteed, posing a certain risk to the subsequent growth of the grass seeds. Ordinary concrete combines concrete and steel reinforcement, with the advantages of both complementing each other. The addition of steel reinforcement mainly compensates for the low tensile strength of concrete. However, in coastal areas, seawater erosion makes the steel reinforcement inside the concrete prone to corrosion, seriously affecting the durability of the concrete. As a porous structure, vegetated concrete offers limited protection for its internal materials, therefore, it is impossible to embed steel reinforcement within it to achieve the purpose of increasing concrete strength. If the steel mesh is replaced with FRP grating, this material has corrosion resistance, which improves the strength of the specimen while reducing the impact of seawater erosion on its durability. Using prefabrication and pre-installation technology, specimens are mass-produced in the factory, resulting in high mechanized construction efficiency, good quality control, and significantly reduced on-site work, saving labor costs. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a precast, pre-installed eco-friendly concrete slab with FRP (fiberglass reinforced plastic) grid and its preparation method, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a precast precast ecological concrete slab with an FRP grid, comprising an ecological concrete block, a crushed stone concrete surface layer block on top of the ecological concrete block, a plurality of upper grooves of the concrete surface layer inside the crushed stone concrete surface layer block, an FRP grid inside the ecological concrete block, a plurality of ecological concrete lifting rings connected to the top of the FRP grid, and a plurality of surface layer lifting rings inside the crushed stone concrete surface layer block.

[0005] As a preferred embodiment of the present invention, the ecological concrete block is made by ecological concrete mold; the crushed stone concrete surface layer block is made by concrete surface layer mold.

[0006] As a preferred embodiment of the present invention, the concrete surface mold is provided with a plurality of cylindrical bodies with built-in grooves and an inner cylinder of the surface mold.

[0007] As a preferred embodiment of the present invention, a steel mesh is provided between the cylinders inside the surface mold.

[0008] As a preferred embodiment of the present invention, the length of the eco-friendly concrete lifting ring is not greater than the overall design thickness of the slab.

[0009] A method for manufacturing a precast precast eco-friendly concrete slab with an FRP (fiberglass reinforced plastic) grid, comprising the following steps:

[0010] S1: Select the mix proportion of the vegetation concrete and mix it according to the designed preparation method;

[0011] First, pour the aggregate into the mixer, add 1 / 3 of the water and mix for 1 minute to moisten the surface of the aggregate. Then, mix the cement, fly ash, and reinforcing agent. Take 1 / 2 of the mixture and pour it into the mixer and mix for 1 minute to ensure the mixture evenly coats the surface of the aggregate. Pour the remaining mixture into the mixer and mix for 1 minute. Add the water-reducing agent to the water and mix thoroughly. Finally, pour the mixture into the mixer and mix for 2 minutes. Observe the state of the mixture in the mixer. When the cementitious paste evenly coats the surface of the coarse aggregate and has a metallic luster, it indicates that a good quality concrete mix has been formed, and the mixing is complete.

[0012] S2: Place an eco-concrete ring at a designated position at the bottom of the customized eco-concrete mold, and lay an FRP grid on top of the eco-concrete ring. The FRP grid has holes at the corresponding positions of the eco-concrete rings to facilitate the eco-concrete rings passing through the FRP grid.

[0013] S3: After the FRP grid is laid, place the prepared mixture into the ecological concrete mold and pour it until it is flush with the top of the mold. During the pouring process, when pouring to 1 / 3 of the set slab thickness, use a tamping rod to tamp it in a clockwise direction to make the aggregate evenly distributed and produce good and effective bonding. After tamping, continue to pour the next layer. After the ecological concrete block is poured, it is cured at room temperature.

[0014] S4: Pour the prepared crushed stone concrete mix into the customized concrete surface mold. Weld several inner cylinders to the upper part of the bottom plate of the concrete surface mold to facilitate the formation of through holes during concrete pouring. Stop pouring when the mix reaches a height of 25-30mm from the top. Place the tied steel mesh into the concrete surface mold and place the surface lifting rings used for hoisting the crushed stone concrete surface blocks into the corresponding inner grooves of the cylinders. Fill the remaining concrete mix into the concrete surface mold. After filling, use a vibrating table to compact the crushed stone concrete surface blocks to make them uniform and dense. After the crushed stone concrete surface blocks are poured, cover them with a wooden board of equal area to the concrete blocks. Use bolts to fasten the wooden board to the concrete surface mold. Use machinery to flip the concrete surface mold. After flipping, let it stand for 30-45 minutes. Use a hook to remove the flipped concrete surface mold from the top of the crushed stone concrete surface blocks. Let the crushed stone concrete surface blocks stand for curing.

[0015] S5: After the ecological concrete blocks have been cured at room temperature for 3 days, cement mortar is applied around the perimeter of the ecological concrete blocks. The crushed stone concrete surface layer blocks are then lifted onto the ecological concrete blocks using surface layer lifting rings. After positioning and calibration, they are lowered and assembled. The weight of the crushed stone concrete surface layer blocks integrates them with the underlying ecological concrete blocks, and they are cured at room temperature for 24 hours. After curing, the entire ecological concrete block is lifted onto the vibrating table using ecological concrete lifting rings. A pre-mixed, fluidized nutrient matrix is ​​then placed onto the surface concrete surface layer. Inside the groove, the matrix slurry flows down along the pores of the porous concrete block and fills the pores. When the slurry can no longer sink, it is vibrated for 5 seconds using a vibrating table to assist in filling the pores and improve the pore filling rate of the ecological concrete block. After the matrix is ​​filled, the component is left to stand for 12 hours. After the internal matrix stops flowing, the entire component is lifted by the ecological concrete lifting ring, and the lower ecological concrete mold is removed, thus completing the production. 3-5 days before leaving the factory, the planting matrix containing grass seeds is placed in the groove above the concrete surface layer. When the filling height is slightly lower than or level with the top of the surface layer, the filling is stopped.

[0016] The beneficial effects of this invention are as follows: Installing FRP (fiberglass reinforced plastic) grids inside (or at the bottom) the ecological concrete increases the contact area between aggregates, enabling effective connection of coarse aggregates, significantly improving the overall performance and load-bearing capacity of the product, reducing construction breakage rates, and expanding the product's application prospects. The FRP grids exhibit excellent corrosion resistance and durability, significantly extending the product's service life and making them suitable for use in coastal areas and environments with corrosive media. Factory production using prefabrication and pre-installation technologies ensures good technical and quality control conditions, significantly reducing on-site work and lowering on-site technical requirements, aligning with the themes of prefabrication and modern manufacturing development. The placement of ordinary concrete blocks on top preserves the good permeability of the ecological concrete, providing space for green vegetation growth, while also improving the product's load-bearing capacity and expanding the application range of ecological concrete. This product can be widely used in various projects, paved in slope protection, pedestrian walkways in residential areas and parks, parking lots, etc., to achieve soil stabilization (preventing slope erosion), permeability, greening, dust absorption, and noise reduction.

[0017] By prefabricating ecological concrete blocks in the factory, the amount of on-site work is significantly reduced. On-site technical requirements are low, and the factory's prefabrication technology and quality control conditions are excellent, allowing for strict control over parameters such as the shape, size, and thickness of the test blocks. Seeds are pre-planted into the soil within the pores of the test specimen. After the specimen is hoisted and placed on-site, providing sufficient moisture to the soil is sufficient for seed germination and growth. No manual sowing is required; the factory's mechanized operation ensures that various substrates necessary for plant growth are evenly filled into the pores. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the front cross-sectional structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the mold for manufacturing the surface layer of the present invention;

[0020] Figure 3 This is a schematic diagram of the grid laying method of the present invention;

[0021] Figure 4 This is a schematic diagram of the overall appearance of the present invention;

[0022] Figure 5 This is a schematic diagram of the overall appearance of the slope protection product of the present invention.

[0023] In the diagram: 1. Ecological concrete block; 2. Ecological concrete lifting ring; 3. FRP grid; 4. Concrete surface mold; 5. Inner cylinder of surface mold; 6. Steel mesh; 7. Surface lifting ring; 8. Cylinder with built-in groove; 9. Crushed stone concrete surface block; 10. Upper groove of concrete surface. Detailed Implementation

[0024] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0025] Example: Combining Figure 1-5 A precast precast eco-concrete slab with FRP grating includes an eco-concrete block 1, a crushed stone concrete surface layer block 9 on top of the eco-concrete block 1, a plurality of upper grooves 10 of the crushed stone concrete surface layer block 9 inside the crushed stone concrete surface layer block 9, an FRP grating 3 inside the eco-concrete block 1, a plurality of eco-concrete lifting rings 2 connected to the top of the FRP grating 3, and a plurality of surface layer lifting rings 7 inside the crushed stone concrete surface layer block 9; the eco-concrete block 1 is made by an eco-concrete mold; the crushed stone concrete surface layer block 9 is made by a concrete surface layer mold 4; the concrete surface layer mold 4 has a plurality of cylinders 8 with built-in grooves and inner cylinders 5; steel mesh 6 is provided between the inner cylinders 5; the length of the eco-concrete lifting rings 2 is not greater than the overall design thickness of the slab.

[0026] A method for manufacturing a precast precast eco-friendly concrete slab with an FRP (fiberglass reinforced plastic) grid, comprising the following steps:

[0027] S1: Select the mix proportion of the vegetation concrete and mix it according to the designed preparation method;

[0028] First, pour the aggregate into the mixer, add 1 / 3 of the water and mix for 1 minute to moisten the surface of the aggregate. Then, mix the cement, fly ash, and reinforcing agent. Take 1 / 2 of the mixture and pour it into the mixer and mix for 1 minute to ensure the mixture evenly coats the surface of the aggregate. Pour the remaining mixture into the mixer and mix for 1 minute. Add the water-reducing agent to the water and mix thoroughly. Finally, pour the mixture into the mixer and mix for 2 minutes. Observe the state of the mixture in the mixer. When the cementitious paste evenly coats the surface of the coarse aggregate and has a metallic luster, it indicates that a good quality concrete mix has been formed, and the mixing is complete.

[0029] S2: Place the eco-concrete hanging ring 2 at the designated position at the bottom of the customized eco-concrete mold, and lay the FRP grid 3 on the top of the eco-concrete hanging ring 2. The FRP grid 3 has holes at the corresponding positions of the eco-concrete hanging ring 2 to facilitate the eco-concrete hanging ring 2 to pass through the FRP grid 3.

[0030] S3: After the FRP grid 3 is laid, place the prepared mixture into the ecological concrete mold and pour it until it is flush with the top of the mold. During the pouring process, when pouring to 1 / 3 of the set slab thickness, use a tamping rod to tamp it in a clockwise direction to make the aggregate evenly distributed and produce good and effective bonding. After tamping, continue pouring the next layer. After the ecological concrete block 1 is poured, it is cured at room temperature.

[0031] S4: Pour the prepared crushed stone concrete mix into the customized concrete surface mold 4. Several inner cylinders 5 are welded to the upper part of the bottom plate of the concrete surface mold 4 to facilitate the formation of through holes during concrete pouring. Stop pouring when the mix reaches a height of 25-30mm from the top. Place the tied steel mesh 6 into the concrete surface mold 4, and place the surface lifting rings 7 used for hoisting the crushed stone concrete surface blocks 9 into the corresponding inner grooves of the cylinders 8. Fill the remaining concrete mix into the concrete surface mold 4. After the material is poured, a vibrating table is used to compact it, so that the crushed stone concrete surface block 9 is prepared evenly and densely. After the crushed stone concrete surface block 9 is poured, a wooden board with the same area as the concrete block is covered on top of it. The wooden board is fastened to the concrete surface mold 4 with bolts. The concrete surface mold 4 is turned over with the help of machinery. After turning over, it is left to stand for 30-45 minutes. The time is adjusted according to the temperature. The turned concrete surface mold 4 is removed from the top of the crushed stone concrete surface block 9 with a hook. The crushed stone concrete surface block 9 is left to stand for curing.

[0032] S5: After the ecological concrete block 1 has been cured at room temperature for 3 days, cement mortar is applied around the ecological concrete block 1. The crushed stone concrete surface layer block 9 is then lifted to the top of the ecological concrete block 1 using the surface layer lifting ring 7. After the position is calibrated, it is lowered and assembled. Using the self-weight of the crushed stone concrete surface layer block 9, it is integrated with the lower ecological concrete block 1 and cured at room temperature for 24 hours. After curing, the ecological concrete block 1 is lifted as a whole to the top of the vibrating table using the ecological concrete lifting ring 2. The pre-mixed, fluid nutrient matrix is ​​then placed into the surface layer of the concrete. In the upper groove 10, the matrix slurry flows down along the pores of the porous concrete block 1 and fills the pores. When the slurry can no longer sink, it is vibrated for 5 seconds using a vibrating table to assist in filling the pores with matrix and improve the pore filling rate of the ecological concrete block 1. After the matrix is ​​filled, the component is left to stand for 12 hours. After the internal matrix stops flowing, it is lifted as a whole by the ecological concrete lifting ring 2 and the lower ecological concrete mold is removed, thus completing the production. 3-5 days before leaving the factory, the planting matrix containing grass seeds is placed in the upper groove 10 of the concrete surface layer. When the filling height is slightly lower than or level with the top of the surface layer, the filling is stopped.

[0033] Working Principle: This invention relates to a precast, pre-planted eco-concrete slab with FRP (fiberglass reinforced plastic) grating and its manufacturing method. A suitable mix proportion for the eco-concrete test blocks is selected, and eco-concrete slabs are precast in a factory. The length and width of the eco-concrete slabs are chosen to be 1m-1.5m, and the thickness is selected to be 80mm-200mm. A custom mold is designed according to actual conditions. An FRP grating of appropriate size is laid at the bottom of the mold, and then eco-concrete is poured to form the slab (if required, after pouring the eco-concrete mixture to a specified height, a second FRP grating or reinforcing fabric can be laid before subsequent filling). A concrete surface slab with the same area as the eco-concrete slab is manufactured. Grooves are cut into the top of the surface slab to provide planting areas as needed. After the two components have cured for a certain period, they are spliced ​​together. A pre-prepared planting substrate suitable for grass seed growth is then filled into the pores. 3-5 days before shipment, the planting substrate mixed with grass seed is placed in the grooves of the surface slab.

[0034] Innovative prefabrication and pre-planting technology: By prefabricating ecological concrete blocks in the factory, the amount of on-site work is significantly reduced. It has low requirements for on-site technical skills, and the factory's prefabrication technology and quality control conditions allow for strict control over parameters such as the shape, size, and thickness of the test blocks. Pre-planting involves pre-burying seeds and planting substrate in the planting area of ​​the test specimen. After the specimen is hoisted and placed on-site, providing sufficient moisture to the soil is sufficient for seed germination and growth. No manual sowing is required; the factory's mechanized operation ensures that various substrates necessary for plant growth are evenly filled into the pores.

[0035] Ecological concrete with FRP grating or reinforcement technology: FRP grating (or reinforcement) is installed inside the product to increase the contact area between aggregates, so that coarse aggregates are effectively connected, improving the compressive strength, flexural strength and durability of the specimen; depending on different functional requirements, different numbers of FRP grating (or reinforcement) can be configured to improve its performance. The corrosion resistance of FRP grating can effectively cope with marine environments in coastal areas and environments with corrosive media.

[0036] Combining environmental beautification and protection, the surface of the product features grooved designs: Precast eco-concrete products can be adjusted according to the applicable area. By using the eco-concrete layer as a benign base layer, a crushed stone concrete surface layer is placed on top. This layer can be designed with grooves according to usage requirements, providing suitable space for the initial growth of grass seeds. Taking slope protection as an example, horizontal triangular (or trapezoidal) grooves can be set on the slope surface. Placing grass seeds in the grooves can effectively prevent the grass seeds from being washed away by rainwater. For parking lots and sidewalks, grooves parallel to the surface of the specimen are set to provide good growth space for the germinating grass seeds. The textured specimen blocks can effectively combine environmental beautification and protection.

[0037] Pre-planting seed formulation and cultivation / maintenance techniques: Taking cold northern regions as an example, bermudagrass and tall fescue are selected and sown using a mixed planting method. Soil, vermiculite, coarse sand, and other substrates are mixed in a certain proportion and injected into the pores. Filling is stopped when the substrate reaches the bottom of the groove. 3-5 days before shipment, the substrate containing the grass seed is filled until the filling material is slightly lower than the top surface by 2mm-5mm (or flush with the top surface of the specimen). Regular watering is necessary to ensure the grass seed remains active.

[0038] Installing FRP (fiberglass reinforced plastic) grids inside (or at the bottom) ecological concrete increases the contact area between aggregates, effectively connecting coarse aggregates, significantly improving the overall performance and load-bearing capacity of the product, reducing construction breakage rates, and expanding its application prospects. FRP grids also exhibit excellent corrosion resistance and durability, greatly extending the product's service life and making them suitable for use in coastal areas and environments with corrosive media. Factory production using prefabrication and pre-installation technologies ensures good technical and quality control, significantly reducing on-site work and lowering on-site technical requirements, aligning with the themes of prefabrication and modern manufacturing. Placing ordinary concrete blocks on top preserves the good permeability of ecological concrete, providing space for vegetation growth, while also increasing the product's load-bearing capacity and expanding its application range. This product can be widely used in various projects, paving slopes, pedestrian walkways in residential areas and parks, parking lots, etc., to achieve purposes such as soil stabilization (preventing soil erosion on slopes), permeability, greening, dust absorption, and noise reduction.

[0039] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A method for manufacturing a precast precast eco-concrete slab with an FRP grid, comprising eco-concrete blocks (1), characterized in that: The top of the ecological concrete block (1) is provided with a crushed stone concrete surface block (9), and the interior of the crushed stone concrete surface block (9) is provided with several upper grooves (10) of the concrete surface. The interior of the ecological concrete block (1) is provided with an FRP grid (3), and the top of the FRP grid (3) is connected with several ecological concrete hanging rings (2). The interior of the crushed stone concrete surface block (9) is provided with several surface hanging rings (7). The specific steps are as follows: S1: Select the mix proportion of the vegetation concrete and mix it according to the designed preparation method; First, pour the aggregate into the mixer, add 1 / 3 of the water and mix for 1 minute to moisten the surface of the aggregate. Then, mix the cement, fly ash, and reinforcing agent. Take 1 / 2 of the mixture and pour it into the mixer and mix for 1 minute to ensure the mixture evenly coats the surface of the aggregate. Pour the remaining mixture into the mixer and mix for 1 minute. Add the water-reducing agent to the water and mix thoroughly. Finally, pour the mixture into the mixer and mix for 2 minutes. Observe the state of the mixture in the mixer. When the cementitious paste evenly coats the surface of the coarse aggregate and has a metallic luster, it indicates that a good quality concrete mix has been formed, and the mixing is complete. S2: Place an ecological concrete hanging ring (2) at a designated position at the bottom of the customized ecological concrete mold, and lay an FRP grid (3) on the top of the ecological concrete hanging ring (2). The FRP grid (3) has holes at the corresponding positions of the ecological concrete hanging ring (2) so that the ecological concrete hanging ring (2) can pass through the FRP grid (3). S3: After the FRP grid (3) is laid, place the prepared mixture in the ecological concrete mold and pour it to be flush with the top of the mold; during the pouring process, when pouring to 1 / 3 of the set plate thickness, use a tamping rod to tamp in a clockwise direction to make the aggregate evenly distributed and produce good and effective bonding. After tamping, continue to pour the next layer; after the ecological concrete block (1) is poured, it is cured at room temperature. S4: Pour the prepared crushed stone concrete mix into the customized concrete surface mold (4). Weld several inner cylinders (5) to the upper part of the bottom plate of the concrete surface mold (4) to facilitate the formation of through holes during concrete pouring. Stop pouring when the mix reaches a height of 25-30mm from the top. Place the tied steel mesh (6) into the concrete surface mold (4) and place the surface lifting ring (7) used for hoisting the crushed stone concrete surface block (9) into the corresponding inner groove cylinder (8). Fill the remaining concrete mix into the concrete surface. After filling the mold (4), a vibrating table is used to vibrate the crushed stone concrete surface block (9) so that it is uniform and dense. After the crushed stone concrete surface block (9) is poured, a wooden board with the same area as the concrete block is covered on top of it. The wooden board is fastened to the concrete surface mold (4) with bolts. The concrete surface mold (4) is turned over with the help of machinery. After turning over, it is left to stand for 30-45 minutes. The turned concrete surface mold (4) is removed from the top of the crushed stone concrete surface block (9) with a hook. The crushed stone concrete surface block (9) is left to stand for curing. S5: After the ecological concrete block (1) is cured at room temperature for 3 days, cement mortar is applied around the ecological concrete block (1). The crushed stone concrete surface block (9) is lifted to the top of the ecological concrete block (1) using the surface lifting ring (7). After the position is calibrated, it is lowered and assembled. With the help of the self-weight of the crushed stone concrete surface block (9), the crushed stone concrete surface block (9) is integrated with the lower ecological concrete block (1) and cured at room temperature for 24 hours. After curing, the ecological concrete block (1) is lifted as a whole to the top of the vibrating table using the ecological concrete lifting ring (2). The pre-mixed, fluid nutrient matrix is ​​placed into the surface. In the upper groove (10) of the concrete surface layer, the matrix slurry flows down along the pores of the porous concrete block 1 and fills the pores. When the slurry can no longer sink, it is vibrated for 5 seconds using a vibrating table to assist in filling the pores and improve the pore filling rate of the ecological concrete block (1). After the matrix filling is completed, the component is left to stand for 12 hours. After the internal matrix stops flowing, it is lifted as a whole by the ecological concrete lifting ring (2) and the lower ecological concrete mold is removed to complete the production. 3-5 days before leaving the factory, the planting matrix containing grass seeds is placed in the upper groove (10) of the concrete surface layer. When the filling height is slightly lower than or level with the top of the surface layer, the filling is stopped.

2. The method for manufacturing precast precast eco-friendly concrete slabs with FRP grids according to claim 1, characterized in that: The ecological concrete block (1) is made by ecological concrete mold; the crushed stone concrete surface block (9) is made by concrete surface mold (4).

3. The method for manufacturing precast precast eco-friendly concrete slabs with FRP grids according to claim 2, characterized in that: The concrete surface mold (4) is provided with several cylinders (8) with built-in grooves and inner cylinders (5) of the surface mold.

4. The method for manufacturing precast precast eco-friendly concrete slabs with FRP grids according to claim 3, characterized in that: The inner cylinders (5) of the surface mold are provided with steel mesh (6).

5. The method for manufacturing precast precast eco-friendly concrete slabs with FRP grids according to claim 1, characterized in that: The length of the ecological concrete lifting ring (2) is not greater than the overall design thickness of the plate.

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