Concrete composite sandwich insulation board with high mechanical property and high insulation effect
By adding large-diameter thin-walled round steel pipes and embedding insulation materials in composite sandwich insulation panels, the thermal bridging problem of composite sandwich panels in improving bending and compressive strength is solved, achieving a balance between high mechanical performance and thermal insulation performance in high-rise buildings.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2026-03-24
AI Technical Summary
While existing composite sandwich insulation panels improve bending and compressive strength, they are prone to thermal bridging, which affects thermal insulation performance. It is difficult to achieve a balance between high mechanical performance and thermal insulation performance in high-rise buildings.
Large-diameter thin-walled round steel pipes are added between the steel mesh of the composite sandwich insulation board, and cross-shaped openings for vertical and longitudinal bars are opened at both ends for embedding and supporting. Combined with the embedded insulation material, a tensile stiffness body is formed, which enhances the bending and compressive resistance and reduces heat conduction.
It improves the bending and compressive strength of composite sandwich panels, reduces heat conduction, ensures that the thermal insulation effect is not affected, and achieves a balance and unity between high comprehensive mechanical properties and thermal insulation performance, meeting the usage requirements of high-rise buildings.
Smart Images
Figure CN224032002U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of precast concrete components, specifically a concrete composite sandwich insulation board that combines high mechanical performance and high thermal insulation effect. Background Technology
[0002] In recent years, high-rise buildings have gradually become one of the mainstream building types in cities. The exterior wall panels of high-rise buildings not only require high strength, rigidity, and durability similar to cement components, but also excellent thermal insulation performance. Therefore, composite sandwich insulation panels have become the preferred prefabricated component for this type of exterior wall panel. The general traditional structure of composite sandwich insulation panels is (see...) Figure 1 and Figure 2 ): A layered composite sandwich panel consisting of a lightweight core layer 2 (commonly made of lightweight boards such as foamed polystyrene board, foamed polyurethane board, foamed glass board, foamed ceramic board, rock wool board, glass fiber wool board, etc.) and fiber cement surface layers 1 (such as fiber cement panels or fiber calcium silicate boards) symmetrically arranged on the left and right sides of the lightweight core layer. In the fiber cement surface layers 1 on both the left and right sides, there are steel mesh 3 formed by the intersection and connection of vertical bars 3-1 and longitudinal bars 3-2 (the diameter range of vertical bars 3-1 and longitudinal bars 3-2 is generally 4-6mm). Horizontal tie bars 4 (the diameter range of horizontal tie bars 4 is generally 3-5mm) are lapped between all corresponding cross intersections of the two steel mesh 3. From the perspective of the general traditional structure of composite sandwich insulation panels: the steel mesh 3 on both sides is connected by lapped horizontal tie bars 4 to form a tensile stiffness body with good tensile performance; however, since the horizontal tie bars 4 are steel bars with a diameter range of 3-5mm, they can provide good tensile performance, but their bending and compressive strength is too poor. If the diameter and cross-section of the horizontal tie bars 4 are directly increased, that is, if thicker steel bars are used as horizontal tie bars 4, this can significantly improve and enhance the bending and compressive strength of the composite sandwich panel, and improve the overall mechanical properties of the composite sandwich insulation panel. However, at the same time, the thicker steel bars will form large thermal bridges, which will greatly reduce the thermal insulation performance of the composite sandwich insulation panel. Therefore, it is necessary to improve the existing traditional composite sandwich insulation board structure and design a composite sandwich insulation board that can significantly improve and enhance bending and compressive performance and improve comprehensive mechanical properties without affecting the insulation effect. This will achieve a balance and unity between high mechanical performance and thermal insulation performance, so as to meet the requirements of high-rise building exterior wall panels for high physical and mechanical properties, lightweight insulation and fire resistance. Summary of the Invention
[0003] The purpose of this invention is to address the shortcomings of the existing technology by providing a concrete composite sandwich insulation board that combines high mechanical performance with excellent thermal insulation. This invention significantly improves the bending and compressive strength of the composite sandwich panel, enhancing its overall mechanical properties. It also minimizes costs while meeting these performance requirements. More importantly, it greatly reduces heat conduction across the composite sandwich panel, ensuring its insulation effect is not significantly compromised. This achieves a balance between high overall mechanical performance and excellent thermal insulation, meeting the requirements of high-rise building exterior wall panels for high overall mechanical performance, lightweight insulation, and fire resistance.
[0004] The objective of this utility model can be achieved through the following technical measures:
[0005] This utility model discloses a concrete composite sandwich insulation board that combines high mechanical performance and high thermal insulation effect. It is a layered composite sandwich board composed of a lightweight core layer and fiber cement surface layers symmetrically arranged on the left and right sides of the lightweight core layer. (The lightweight core layer is lightweight, heat-insulating, and fireproof; fiber cement is superior to ordinary cement in terms of strength, durability, and crack resistance; the combination of the lightweight core layer and the fiber cement surface layer lays the foundation for the composite sandwich insulation board to achieve both mechanical performance and thermal insulation performance.) In the fiber cement surface layers on both sides, there are steel meshes formed by the intersection and connection of vertical and longitudinal bars. Horizontal tie bars are lapped between all corresponding cross intersections of the two steel meshes (the above is also a structural feature of conventional composite sandwich insulation boards).The steel mesh on both sides is connected by lapped horizontal reinforcing bars to form a tensile stiffness body with good tensile performance; however, since the horizontal reinforcing bars are steel bars with a diameter range of 3-5mm, although they have good tensile performance, they basically have no bending deformation resistance, that is, the bending performance of the horizontal reinforcing bars is extremely poor, and their compressive performance is also not high); the concrete composite sandwich insulation board has thin-walled round steel tubes with embedded insulation material on some of the horizontal reinforcing bars in the middle row and the two end rows along the length direction, and the thin-walled round steel tubes are simultaneously embedded and supported between the left and right steel meshes (this utility model uses... Adding large-diameter thin-walled round steel pipes can significantly improve the bending and compressive strength of composite sandwich panels, enhancing their overall mechanical properties. Simultaneously, by rationally designing and arranging the quantity and location of the thin-walled round steel pipes in key areas, this invention can minimize costs while meeting overall mechanical performance requirements. More importantly, the added thin-walled round steel pipes have low thermal bridges, significantly reducing heat conduction across the composite sandwich panel and ensuring its insulation effect is not significantly affected. Furthermore, the thin-walled round steel pipes also contain embedded insulation material, thus ensuring smooth heat transfer. To achieve a balance and unity between high comprehensive mechanical properties and thermal insulation performance, meeting the requirements of high-rise building exterior wall panels for high comprehensive mechanical properties, lightweight insulation, and fire resistance; both ends of the thin-walled round steel tube have two symmetrically opened slots along the length direction for embedding vertical reinforcement bars and two symmetrically opened slots along the length direction for embedding longitudinal reinforcement bars, and the two vertical reinforcement slots and two longitudinal reinforcement slots are arranged in a cross shape (to facilitate the quick and convenient embedding and support of the thin-walled round steel tube between the left and right steel meshes for positioning and support); the outer diameter of the thin-walled round steel tube is 4 to 10 times the diameter of the horizontal tie bar. The wall thickness of the thin-walled round steel tube is 0.3-4mm (ensuring that the thin-walled round steel tube embedded between the two steel meshes has a large diameter cross-section, which can greatly improve the bending and compressive strength of the composite sandwich panel, thereby enhancing the comprehensive mechanical properties of the composite sandwich insulation panel). The wall thickness of the thin-walled round steel tube is 0.3-4mm (ensuring that the thin-walled round steel tube is a thin-walled thermal break structure, which can greatly reduce the heat conduction on both sides of the composite sandwich insulation panel, while improving the bending and compressive strength of the composite sandwich panel, it also ensures that the insulation effect of the composite sandwich insulation panel is not greatly affected, thus successfully achieving a balance and unity between high comprehensive mechanical properties and thermal insulation performance).
[0006] In this utility model, both the vertical bar opening groove and the longitudinal bar opening groove are long grooves with one end open and the other end being a semi-circular arc (to facilitate the insertion of vertical and longitudinal bars, and to facilitate the quick and convenient insertion and support of thin-walled round steel pipes between the left and right steel meshes for positioning and support). The groove width and semi-circular arc diameter of the vertical bar opening groove are matched with the diameter of the vertical bar (to facilitate the quick insertion of vertical bars), and the groove width and semi-circular arc diameter of the longitudinal bar opening groove are matched with the diameter of the longitudinal bar (to facilitate the quick insertion of longitudinal bars).
[0007] The lightweight core layer described in this utility model is any one of foamed polystyrene board, foamed polyurethane board, foamed glass board, foamed ceramic board, rock wool board, and glass fiber board (these materials used in the lightweight core layer all have the characteristics of being lightweight, heat-insulating, and fireproof, thus giving the composite sandwich insulation board of this utility model the advantages of being lightweight, heat-insulating, and fireproof); the insulation material is the same material as the lightweight core layer.
[0008] The fiber cement surface layer described in this utility model is any one of glass fiber cement surface layer, organic fiber cement surface layer, and steel fiber cement surface layer (fiber cement is superior to ordinary cement in terms of strength, durability and crack resistance, and can better guarantee the mechanical properties of composite sandwich insulation board).
[0009] The design principle of this utility model is as follows:
[0010] This invention involves strategically adding large-diameter, thin-walled circular steel pipes with embedded insulation material to key sections along the length of a composite sandwich insulation panel, specifically in the middle and end rows. These pipes are embedded between the left and right reinforcing meshes to strengthen the transverse reinforcement. By adding these large-diameter, thin-walled circular steel pipes, this invention significantly improves the bending and compressive strength of the composite sandwich panel, enhancing its overall mechanical properties. Furthermore, the rational design and arrangement of the number and placement of these thin-walled circular steel pipes minimizes costs while maintaining overall mechanical performance. More importantly, the added thin-walled circular steel pipes minimize thermal bridges, significantly reducing heat conduction across the composite sandwich insulation panel and ensuring minimal impact on its insulation effect. The embedded insulation material within these thin-walled circular steel pipes further achieves a balance between high overall mechanical performance and thermal insulation, meeting the requirements of high-rise building exterior wall panels for high overall mechanical performance, lightweight insulation, and fire resistance. In addition, two vertical bar opening slots for embedding vertical bars and two longitudinal bar opening slots for embedding longitudinal bars are symmetrically opened at both ends of the thin-walled round steel pipe along the length direction, which makes it convenient for the thin-walled round steel pipe to be quickly and easily embedded and supported between the left and right steel meshes. Therefore, this utility model also has the advantages of convenient bar making and easy production.
[0011] The beneficial technical effects of this utility model are as follows:
[0012] This invention can significantly improve the bending and compressive strength of composite sandwich panels, enhance their overall mechanical properties, and minimize costs while meeting overall mechanical performance requirements. More importantly, it can greatly reduce heat conduction on both sides of the composite sandwich panel, ensuring that the insulation effect is not significantly affected. This successfully achieves a balance and unity between high overall mechanical performance and thermal insulation performance, meeting the requirements of high-rise building exterior wall panels for high overall mechanical performance, lightweight insulation, and fire resistance. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of a traditional composite sandwich insulation board.
[0014] Figure 2 yes Figure 1 The left view.
[0015] Figure 3 This is the front view of the representative structure of this utility model.
[0016] Figure 4 yes Figure 3 The left view.
[0017] Figure 5 yes Figure 3 A magnified view of a portion of point A in the middle.
[0018] Figure 6 This is the front view of a thin-walled round steel pipe.
[0019] Figure 7 yes Figure 6 Top view.
[0020] Figure 8 yes Figure 6 The left view.
[0021] The part numbers in the diagram are as follows: 1. Fiber cement surface layer, 2. Lightweight core layer, 3. Steel mesh, 3-1. Vertical bar, 3-2. Longitudinal bar, 4. Horizontal tie bar, 5. Thin-walled round steel pipe, 5-1. Vertical bar opening groove, 5-2. Longitudinal bar opening groove, 6. Thermal insulation material. Detailed Implementation
[0022] The present invention will be further described below with reference to the accompanying drawings and two embodiments:
[0023] like Figures 3-8As shown, this utility model discloses a concrete composite sandwich insulation board that combines high mechanical performance and high thermal insulation effect. It is a layered composite sandwich board composed of a lightweight core layer 2 and fiber cement surface layers 1 symmetrically arranged on the left and right sides of the lightweight core layer. (The lightweight core layer 2 is lightweight, heat-insulating, and fireproof; fiber cement is superior to ordinary cement in terms of strength, durability, and crack resistance; the combination of the lightweight core layer 2 and the fiber cement surface layer 1 lays the foundation for the composite sandwich insulation board to take into account both mechanical performance and thermal insulation performance.) In the fiber cement surface layers 1 on both the left and right sides, there are steel mesh sheets 3 formed by the cross-section and connection of vertical bars 3-1 and longitudinal bars 3-2. Horizontal tie bars 4 are lapped between all corresponding cross intersections of the two steel mesh sheets 3 (the above is also a structural feature of conventional composite sandwich insulation boards).The steel mesh 3 on both sides are connected by lapped horizontal reinforcing bars 4 to form a tensile stiffness body with good tensile performance; however, since the horizontal reinforcing bars 4 are steel bars with a diameter range of 3 to 5 mm, they can play a good tensile role, but the horizontal reinforcing bars 4 basically do not have the ability to resist bending deformation, that is, the bending performance of the horizontal reinforcing bars 4 is extremely poor, and the compressive performance is also not high); the concrete composite sandwich insulation board has thin-walled round steel pipes 5 with embedded insulation material (6) on some of the horizontal reinforcing bars 4 in the middle row and the two end rows along the length direction. The thin-walled round steel pipes 5 are also embedded and supported between the left and right steel mesh 3 (this utility model is generally By adding large-diameter thin-walled circular steel pipes 5, the bending and compressive strength of the composite sandwich panel can be greatly improved, thus enhancing its overall mechanical properties. Simultaneously, by rationally designing and arranging the number and position of the thin-walled circular steel pipes 5 in key areas, this invention can minimize costs while meeting overall mechanical performance requirements. More importantly, the added thin-walled circular steel pipes 5 have small thermal bridges, significantly reducing heat conduction on both sides of the composite sandwich panel. Furthermore, the thin-walled circular steel pipes also contain embedded insulation material, ensuring that the insulation effect of the composite sandwich panel is not significantly affected, thus achieving high overall performance. The design balances and unifies mechanical properties with thermal insulation performance, meeting the requirements of high-rise building exterior wall panels for high comprehensive mechanical properties, lightweight insulation, and fire resistance. Both ends of the thin-walled circular steel pipe 5 have two symmetrically spaced vertical bar openings 5-1 for embedding vertical bars 3-1 and two symmetrically spaced longitudinal bar openings 5-2 for embedding longitudinal bars 3-2, arranged in a cross shape (facilitating quick and easy embedding and support of the thin-walled circular steel pipe 5 between the left and right steel meshes 3). The outer diameter of the thin-walled circular steel pipe 5 is the diameter of the horizontal tie bar 4. The diameter is 4 to 10 times (ensuring that the thin-walled round steel pipe 5 embedded between the two steel meshes 3 on the left and right sides has a large diameter cross-section, which can greatly improve the bending and compressive properties of the composite sandwich panel, thereby enhancing the comprehensive mechanical properties of the composite sandwich insulation panel). The wall thickness of the thin-walled round steel pipe 5 ranges from 0.3 to 4 mm (ensuring that the thin-walled round steel pipe 5 is a thin-walled broken bridge structure, which can greatly reduce the heat conduction on both sides of the composite sandwich insulation panel, while improving the bending and compressive properties of the composite sandwich panel, it also ensures that the insulation effect of the composite sandwich insulation panel is not greatly affected, thus successfully achieving a balance and unity between high comprehensive mechanical properties and thermal insulation performance).
[0024] In this utility model, the vertical bar opening groove 5-1 and the longitudinal bar opening groove 5-2 are both long grooves with one end open and the other end being a semi-circular arc (to facilitate the insertion of vertical bars 3-1 and longitudinal bars 3-2, and to facilitate the quick and convenient insertion and support of the thin-walled round steel pipe 5 between the left and right steel meshes 3 for positioning and support). The groove width and semi-circular arc diameter of the vertical bar opening groove 5-1 are matched with the diameter of the vertical bar 3-1 (to facilitate the quick insertion of the vertical bar 3-1). The groove width and semi-circular arc diameter of the longitudinal bar opening groove 5-2 are matched with the diameter of the longitudinal bar 3-2 (to facilitate the quick insertion of the longitudinal bar 3-2).
[0025] The lightweight core layer 2 described in this utility model is any one of foamed polystyrene board, foamed polyurethane board, foamed glass board, foamed ceramic board, rock wool board, and glass fiber board (these materials used in the lightweight core layer 2 all have the characteristics of being lightweight, heat-insulating, and fireproof, thus giving the composite sandwich insulation board of this utility model the advantages of being lightweight, heat-insulating, and fireproof); the insulation material 6 is made of the same material as the lightweight core layer 2.
[0026] The fiber cement surface layer 1 described in this utility model is any one of glass fiber cement surface layer, organic fiber cement surface layer, and steel fiber cement surface layer (fiber cement is superior to ordinary cement in terms of strength, durability and crack resistance, and can better guarantee the mechanical properties of composite sandwich insulation board).
[0027] The specific manufacturing process of this utility model is as follows:
[0028] First, the material for the lightweight core layer 2 needs to be selected based on the application and functional requirements of the component—for example, it can be any one of foamed polystyrene board, foamed polyurethane board, foamed glass board, foamed ceramic board, rock wool board, or glass fiber board. The corresponding size of the lightweight core layer 2 should be ordered according to the panel shape and specifications of the component to be prefabricated. Then, similarly, the material for the fiber cement surface layer 1 should be selected as needed—for example, it can be any one of glass fiber cement, organic fiber cement, or steel fiber cement. Next, the corresponding steel mesh 3 is fabricated. Subsequently, thin-walled round steel pipes 5 are inserted along the thickness direction of the lightweight core layer 2 in the key sections of the central and end columns along the length direction. Then, the horizontal tie bars 4 located in the key sections pass directly through the thin-walled round steel pipes 5, and the insulation material 6 is embedded in the thin-walled round steel pipes 5. The horizontal tie bars 4 in other sections are inserted along the thickness direction of the lightweight core layer 2. At the same time, the two ends of the horizontal tie bars 4 are lapped and fixed to all the corresponding cross intersections in the steel mesh 3 formed by the vertical bars 3-1 and the longitudinal bars 3-2 in the fiber cement surface layers 1 on the left and right sides. Then, the lightweight core layer 2 and the overall steel mesh frame are placed in the center of the cuboid forming mold cavity. Next, fiber-reinforced concrete slurry is poured into the cavities on both sides of the lightweight core layer 2 in the molding cavity. After solidification and initial curing, the fiber cement surface layer 1 is formed. Finally, after curing to a certain strength, the resulting high-performance composite sandwich insulation board component can be removed from the molding cavity.
Claims
1. A concrete composite sandwich panel that combines high mechanical performance and high thermal insulation effect is a layered composite sandwich panel consisting of a lightweight core layer (2) and fiber cement surface layers (1) symmetrically arranged on the left and right sides of the lightweight core layer. A steel mesh (3) formed by the intersecting and connecting of vertical bars (3-1) and longitudinal bars (3-2) is placed in the fiber cement surface layers (1) on both sides. Horizontal tie bars (4) are lapped between all corresponding cross intersections of the two steel meshes (3). The panel is characterized by: The concrete composite sandwich insulation board has thin-walled round steel pipes (5) with embedded insulation material (6) on the middle row and some of the end rows of the horizontal tie bars (4) along the length direction. The thin-walled round steel pipes (5) are also embedded and supported between the left and right steel meshes (3). The two ends of the thin-walled round steel pipes (5) are symmetrically opened along the length direction for two vertical bar opening slots (5-1) for embedding vertical bars (3-1) and two longitudinal bar opening slots (5-2) for embedding longitudinal bars (3-2). The two vertical bar opening slots (5-1) and the two longitudinal bar opening slots (5-2) are arranged in a cross shape. The outer diameter of the thin-walled round steel pipes (5) is 4 to 10 times the diameter of the horizontal tie bars (4), and the wall thickness of the thin-walled round steel pipes (5) ranges from 0.3 to 4 mm.
2. The concrete composite sandwich insulation board with both high mechanical properties and high thermal insulation effect according to claim 1, characterized in that: The vertical rib opening groove (5-1) and the longitudinal rib opening groove (5-2) are both long grooves with one end open and the other end being a semi-circular arc. The groove width and semi-circular arc diameter of the vertical rib opening groove (5-1) are matched with the diameter of the vertical rib (3-1), and the groove width and semi-circular arc diameter of the longitudinal rib opening groove (5-2) are matched with the diameter of the longitudinal rib (3-2).
3. The concrete composite sandwich insulation board according to claim 1, which combines high mechanical properties and high thermal insulation effect, is characterized in that: The lightweight core layer (2) is any one of foamed polystyrene board, foamed polyurethane board, foamed glass board, foamed ceramic board, rock wool board, and glass fiber board; the thermal insulation material (6) is made of the same material as the lightweight core layer (2).
4. The concrete composite sandwich insulation board according to claim 1, which combines high mechanical properties and high thermal insulation effect, is characterized in that: The fiber cement surface layer (1) is any one of glass fiber cement surface layer, organic fiber cement surface layer, and steel fiber cement surface layer.