Recycled aggregate concrete precast component
Patent Information
- Application Number
- CN202520662834.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-10-23
- Estimated Expiration
- 2035-04-09
AI Technical Summary
[0002]在现有的混凝土预制构件技术中，虽然已有多种类型的预制构件被广泛应用于建筑、道路、桥梁等工程领域，但这些预制构件在材料利用、性能表现以及环境影响等方面仍存在诸多不足
1、本申请中，通过加强层来增强了预制构件的整体承载能力和稳定性，通过中间功能层的气凝胶颗粒和轻质骨料提供了良好的隔热保温性能，有助于减轻整个预制构件的重量，通过表面耐磨层的多层结构提高了构件的耐磨性和防腐蚀性，显著提高预制构件的力学性能、隔热保温性能和耐磨耐腐蚀性，符合可持续发展的理念，减少资源浪费和环境污染，满足多样化的使用需求，具有良好的应用前景。
Smart Images
Figure CN224885007U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of precast concrete technology, and in particular to precast concrete components made from recyclable recycled aggregate. Background Technology
[0002] Although various types of precast concrete components have been widely used in construction, road and bridge engineering, these precast components still have many shortcomings in terms of material utilization, performance and environmental impact.
[0003] First, traditional precast concrete components often use a large amount of virgin materials, such as natural aggregates and new cement. This not only consumes a lot of natural resources, but also generates a lot of waste during production and use, which imposes a serious burden on the environment. Second, traditional precast concrete components have a single function and cannot meet diverse usage needs, resulting in a relatively limited application prospect. Utility Model Content
[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a recyclable precast concrete component using recycled aggregate.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: A recyclable precast concrete component using recycled aggregate includes a first recycled aggregate layer and a second recycled aggregate layer, with a reinforcing layer between the first and second recycled aggregate layers. A cavity is provided in the middle of the first recycled aggregate layer, and the cavity is filled with an intermediate functional layer. A wear-resistant surface layer is provided on the surfaces of the first and second recycled aggregate layers. Grouting holes are provided at the four corners of the first recycled aggregate layer. A connecting column is integrally formed on the side of the second recycled aggregate layer closest to the first recycled aggregate layer during casting, and the connecting column completely fills the grouting holes.
[0006] Preferably, the grouting hole is frustum-shaped, and the diameter of the grouting hole gradually increases from the direction closer to the second recycled aggregate layer to the direction farther away from the second recycled aggregate layer. The shape of the connecting column matches the grouting hole.
[0007] Preferably, both the first recycled aggregate layer and the second recycled aggregate layer are cast from a mixture of recycled coarse aggregate, recycled fine aggregate, cement, fly ash, and nano-silica.
[0008] Preferably, the reinforcing layer comprises recycled polypropylene mesh material and is provided in two layers. The recycled polypropylene woven mesh is formed by cross-weaving in the warp and weft directions, and the mesh apertures of the two layers of recycled polypropylene mesh are 10×10mm and 30×30mm, respectively.
[0009] Preferably, the warp and weft of one layer of the recycled polypropylene mesh are arranged at 45° to the diagonal of the first recycled aggregate layer, and the warp and weft of the other layer of the recycled polypropylene mesh are arranged parallel to the diagonal of the first recycled aggregate layer.
[0010] Preferably, the intermediate functional layer is formed by mixing and casting aerogel particles, lightweight aggregates and low-alkali cementitious materials, wherein the lightweight aggregates are either expanded perlite or foamed glass particles.
[0011] Preferably, the surface wear-resistant layer includes a bottom layer disposed on the surface of the first recycled aggregate layer and the second recycled aggregate layer, a base coating layer disposed on one side of the bottom layer, an intermediate coating layer disposed on one side of the base coating layer, and a top coating layer disposed on one side of the intermediate coating layer.
[0012] Preferably, the bottom layer is epoxy quartz mortar, the base layer is epoxy penetrating primer, the intermediate layer is silicon carbide-containing epoxy mortar, and the top layer is fluorocarbon topcoat.
[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this application, the overall load-bearing capacity and stability of the precast component are enhanced by the reinforcing layer, and the aerogel particles and lightweight aggregates in the intermediate functional layer provide good thermal insulation performance, which helps to reduce the weight of the entire precast component. The multi-layer structure of the surface wear-resistant layer improves the wear resistance and corrosion resistance of the component, significantly improving the mechanical properties, thermal insulation performance and wear and corrosion resistance of the precast component. This is in line with the concept of sustainable development, reduces resource waste and environmental pollution, meets diverse usage needs, and has good application prospects.
[0014] 2. In this application, grouting holes are provided at the four corners of the first recycled aggregate layer, and the second recycled aggregate layer is integrally formed with connecting columns that completely fill the grouting holes during pouring, which enhances the tight bond between the two, further enhances the stability and strength of the connection, and can form an effective support structure when under stress, dispersing and transferring loads and reducing stress concentration. Attached Figure Description
[0015] Figure 1 This is a three-dimensional structural diagram of the recyclable recycled aggregate concrete precast component proposed in this utility model. Figure 2 This is a cross-sectional schematic diagram of the recyclable recycled aggregate concrete precast component proposed in this utility model. Figure 3 This is an exploded structural diagram of the recyclable recycled aggregate concrete precast component proposed in this utility model. Figure 4This is a schematic diagram of the surface wear-resistant layer structure of the recyclable recycled aggregate concrete precast component proposed in this utility model.
[0016] Legend: 100, First recycled aggregate layer; 101, Grouting hole; 102, Receiving cavity; 200, Second recycled aggregate layer; 201, Connecting column; 300, Reinforcing layer; 400, Intermediate functional layer; 500, Surface wear-resistant layer; 501, Bottom layer; 502, Primer coating; 503, Intermediate coating; 504, Top coating. Detailed Implementation
[0017] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0018] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.
[0019] like Figure 1-4 As shown, this utility model provides a recyclable precast concrete component using recycled aggregate, including a first recycled aggregate layer 100 and a second recycled aggregate layer 200. A reinforcing layer 300 is provided between the first recycled aggregate layer 100 and the second recycled aggregate layer 200. A receiving cavity 102 is provided in the middle of the first recycled aggregate layer 100, and an intermediate functional layer 400 is filled in the receiving cavity 102. A surface wear-resistant layer 500 is provided on the surface of the first recycled aggregate layer 100 and the second recycled aggregate layer 200. Grouting holes 101 are provided at the four corners of the first recycled aggregate layer 100. A connecting column 201 is integrally formed on the side of the second recycled aggregate layer 200 near the first recycled aggregate layer 100 during casting, and the connecting column 201 completely fills the grouting holes 101.
[0020] In this embodiment, the grouting hole 101 is frustum-shaped, and the diameter of the grouting hole 101 gradually increases from the direction close to the second recycled aggregate layer 200 to the direction away from the second recycled aggregate layer 200. The shape of the connecting column 201 matches the grouting hole 101. Specifically, the grouting hole 101 adopts a frustum-shaped design, which enables the connecting column 201 to form a mechanical locking effect during filling, ensuring a tight bond between the two and further enhancing the stability and connection strength between the first recycled aggregate layer 100 and the second recycled aggregate layer 200. The grouting hole 101 and connecting column 201 set at the four corners can form an effective support structure under stress, dispersing and transferring loads and reducing stress concentration.
[0021] In this embodiment, both the first recycled aggregate layer 100 and the second recycled aggregate layer 200 are cast from a mixture of recycled coarse aggregate, recycled fine aggregate, cement, fly ash and nano-silica. Specifically, recycled coarse aggregate accounts for 60% with a particle size of 5-20mm, providing good skeletal support and enhancing the strength and stability of concrete. Recycled fine aggregate accounts for 20% with a particle size of less than 5mm, filling the voids between coarse aggregates and improving the density and durability of concrete. Ordinary Portland cement accounts for 15% of the cement, providing the necessary cementitious material for concrete and ensuring its setting and hardening performance. Fly ash accounts for 5%, serving as an admixture to improve the workability of concrete, increase fluidity, and reduce bleeding and segregation. Fly ash also replaces part of the cement, reducing carbon emissions. Nano-silica accounts for 3%, and its nano-sized particles can fill the micropores in concrete, improving its density and strength. At the same time, nano-silica can also react chemically with cement hydration products to form a denser microstructure, further improving the durability and impermeability of concrete.
[0022] In this embodiment, the reinforcing layer (300) includes recycled polypropylene mesh material and is provided in two layers. The recycled polypropylene woven mesh is formed by cross weaving in the warp and weft directions. The mesh apertures of the two layers of recycled polypropylene mesh are 10×10mm and 30×30mm, respectively. Specifically, the use of recycled polypropylene mesh material aligns with the concepts of environmental protection and sustainable development, helping to reduce resource waste and environmental pollution. Recycled polypropylene mesh material has high strength and stiffness, good weather resistance and corrosion resistance, and can resist erosion and damage in the natural environment. As a reinforcing layer 300, it can significantly improve the overall load-bearing capacity of precast components. The setting of two mesh layers further enhances the strength and stability of the components, enabling them to withstand greater loads.
[0023] In this embodiment, the warp and weft of one layer of recycled polypropylene mesh are set at 45° to the diagonal of the first recycled aggregate layer 100, and the warp and weft of the other layer of recycled polypropylene mesh are set parallel to the diagonal of the first recycled aggregate layer 100. Specifically, the recycled polypropylene grid with its warp and weft lines set at 45° to the diagonal of the first recycled aggregate layer 100 can effectively disperse and transfer loads, reducing stress concentration. The recycled polypropylene grid with its warp and weft lines set parallel to the diagonal of the first recycled aggregate layer 100 provides additional support and constraint, enhancing the stress performance of the component in a specific direction.
[0024] In this embodiment, the intermediate functional layer 400 is cast from a mixture of aerogel particles, lightweight aggregates and low-alkali cementitious materials. The lightweight aggregate is either expanded perlite or foamed glass particles. Specifically, aerogel particles account for 30% of the composition, with a thermal conductivity of less than 0.02 W / (m·K), giving the interlayer extremely low thermal conductivity. This effectively reduces heat transfer, improves the insulation performance of the component, and lowers building energy consumption. Lightweight aggregates account for 40%, making the interlayer lighter overall and helping to reduce the weight of the entire precast component. Low-alkali cementitious materials account for 30%, providing good adhesion and strength. This ensures that the interlayer is lightweight without sacrificing strength, preventing cracking caused by alkali reactions during concrete hardening, thereby improving the durability of the component. At the same time, both aerogel particles and lightweight aggregates are not easily affected by chemical erosion and the natural environment, maintaining long-term stable performance.
[0025] In this embodiment, the surface wear-resistant layer 500 includes a bottom layer 501 disposed on the surface of the first recycled aggregate layer 100 and the second recycled aggregate layer 200. A base coating layer 502 is disposed on one side of the bottom layer 501, a middle coating layer 503 is disposed on one side of the base coating layer 502, and a top coating layer 504 is disposed on one side of the middle coating layer 503. The bottom layer 501 is epoxy quartz mortar, the base coating layer 502 is epoxy penetrating primer, the middle coating layer 503 is silicon carbide-containing epoxy mortar, and the top coating layer 504 is fluorocarbon topcoat. Specifically, the base coat 501 is epoxy quartz mortar, applied in two cross-coats using a high-pressure airless sprayer with a 15-minute interval. It is then cured with 60°C hot air circulation for 2 hours, forming a surface with a Mohs hardness of 7.2, approximately 80% higher than ordinary concrete. This allows it to withstand long-term pressure from forklifts and heavy machinery. The base coat 502 is an epoxy penetrating primer with 70% solids content, applied at a rate of 0.2 kg / m². It effectively penetrates the concrete surface, forming a dense anti-corrosion layer that prevents moisture and corrosive substances from entering the concrete. The intermediate coating 503 is a silicon carbide-containing epoxy mortar with a thickness of 2mm. The silicon carbide particles have extremely high hardness, which makes the intermediate coating 503 perform well in terms of friction and wear, further enhancing the wear resistance of the component. The top coating 504 is a fluorocarbon topcoat with a dry film thickness of 80μm. It has excellent waterproof performance and weather resistance, and can protect concrete from water-related damage and natural environmental erosion for a long time. It can maintain the natural texture and feel of the concrete surface, while providing a rich selection of colors and glosses to meet different aesthetic needs.
[0026] How to use and how to work this device: First, recycled coarse aggregate, recycled fine aggregate, cement, fly ash and nano silica are mixed evenly in proportion as raw materials for the first recycled aggregate layer 100 and the second recycled aggregate layer 200. The mixture is then poured to form the first recycled aggregate layer 100. A cavity 102 and a grouting hole 101 are pre-reserved on the first recycled aggregate layer 100 using a mold. Then, two layers of recycled polypropylene mesh material are laid on the first recycled aggregate layer 100. The warp and weft of one layer of mesh are set at 45° with the diagonal of the first recycled aggregate layer 100 and the mesh aperture is 10mm×10mm. The warp and weft of the other layer are laid parallel to the diagonal and the mesh aperture is 30mm×30mm. Then, aerogel particles, lightweight aggregates and low-alkali cementitious materials are mixed evenly in proportion as the raw materials for the intermediate functional layer 400 and filled into the cavity 102. Subsequently, a wear-resistant layer 500 is applied on the first recycled aggregate layer 100 and the second recycled aggregate layer 200. The base layer 501 is applied in two cross-spraying stages using a high-pressure airless sprayer, followed by roller coating of the base layer 502 and intermediate layer 503, and then the top layer 504 is applied.
[0027] In summary, the reinforcing layer 300 enhances the overall load-bearing capacity and stability of the precast component, while the aerogel particles and lightweight aggregates in the intermediate functional layer 400 provide excellent thermal insulation performance, helping to reduce the overall weight of the precast component. The multi-layered structure of the surface wear-resistant layer 500 improves the wear resistance and corrosion resistance of the component, significantly enhancing the mechanical properties, thermal insulation performance, and wear and corrosion resistance of the precast component. This aligns with the concept of sustainable development, reduces resource waste and environmental pollution, meets diverse usage needs, and has promising application prospects.
[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.
Claims
1. A recyclable precast concrete component made from recycled aggregate, characterized in that: The material includes a first recycled aggregate layer (100) and a second recycled aggregate layer (200). A reinforcing layer (300) is provided between the first recycled aggregate layer (100) and the second recycled aggregate layer (200). A receiving cavity (102) is provided in the middle of the first recycled aggregate layer (100). An intermediate functional layer (400) is filled in the receiving cavity (102). A surface wear-resistant layer (500) is provided on the surface of the first recycled aggregate layer (100) and the second recycled aggregate layer (200). Grouting holes (101) are provided at the four corners of the first recycled aggregate layer (100). A connecting column (201) is integrally formed on the side of the second recycled aggregate layer (200) close to the first recycled aggregate layer (100) during casting. The connecting column (201) completely fills the grouting holes (101).
2. The recyclable precast concrete component using recycled aggregate according to claim 1, characterized in that: The grouting hole (101) is frustum-shaped, and the diameter of the grouting hole (101) gradually increases from the direction close to the second recycled aggregate layer (200) to the direction away from the second recycled aggregate layer (200). The shape of the connecting column (201) matches the grouting hole (101).
3. The recyclable precast concrete component using recycled aggregate according to claim 1, characterized in that: The first recycled aggregate layer (100) and the second recycled aggregate layer (200) are both cast from recycled coarse aggregate, recycled fine aggregate, cement, fly ash and nano silica.
4. The recyclable precast concrete component using recycled aggregate according to claim 1, characterized in that: The reinforcing layer (300) includes recycled polypropylene mesh material and is provided in two layers. The recycled polypropylene mesh is woven in the warp and weft directions, and the mesh apertures of the two layers of recycled polypropylene mesh are 10×10mm and 30×30mm, respectively.
5. The recyclable precast concrete component using recycled aggregate according to claim 4, characterized in that: The warp and weft of one layer of the recycled polypropylene mesh are set at 45° to the diagonal of the first recycled aggregate layer (100), and the warp and weft of the other layer of the recycled polypropylene mesh are set parallel to the diagonal of the first recycled aggregate layer (100).
6. The recyclable precast concrete component using recycled aggregate according to claim 1, characterized in that: The intermediate functional layer (400) is formed by mixing and casting aerogel particles, lightweight aggregates and low-alkali cementitious materials, wherein the lightweight aggregates are either expanded perlite or foam glass particles.
7. The recyclable precast concrete component using recycled aggregate according to claim 1, characterized in that: The wear-resistant surface layer (500) includes a bottom layer (501) disposed on the surface of the first recycled aggregate layer (100) and the second recycled aggregate layer (200), a base coating layer (502) disposed on one side of the bottom layer (501), a middle coating layer (503) disposed on one side of the base coating layer (502), and a top coating layer (504) disposed on one side of the middle coating layer (503).
8. The recyclable precast concrete component using recycled aggregate according to claim 7, characterized in that: The bottom layer (501) is epoxy quartz mortar, the base layer (502) is epoxy penetrating primer, the intermediate layer (503) is silicon carbide-containing epoxy mortar, and the top layer (504) is fluorocarbon topcoat.