A crack-resistant reinforced autoclaved aerated concrete wall panel
By introducing a three-layer mesh fiber cement reinforcement and an arc-shaped fiber cement reinforcement design into the autoclaved aerated concrete wall panel, the problem of easy cracking of the wall panel was solved, the strength and compressive strength were improved, the service life was extended and the impermeability was enhanced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN PROVINCIAL ARCHITECTURAL DESIGN & RES INST
- Filing Date
- 2025-08-15
- Publication Date
- 2026-07-03
AI Technical Summary
Existing autoclaved aerated concrete wall panels have low overall strength, poor compressive strength, are prone to cracking, and have a limited service life.
The wall panel is constructed using an autoclaved aerated concrete layer made from a mixture of fiber and concrete. It contains three layers of mesh fiber cement reinforcement and arc-shaped fiber cement reinforcement. The symmetrically distributed arc-shaped design disperses stress, enhances the overall rigidity and compressive strength of the wall panel, and prevents crack propagation.
It improves the overall strength and compressive strength of the wall panel, reduces the occurrence of cracks, extends service life, and enhances impermeability and impact toughness.
Smart Images
Figure CN224452020U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of autoclaved aerated concrete wall panels, specifically to a crack-resistant and reinforced autoclaved aerated fiber concrete wall panel. Background Technology
[0002] Autoclaved aerated concrete (AAC) wall panels offer advantages such as lightweight, excellent fire resistance and sound insulation, environmental friendliness, economy, and convenient construction. Made primarily from silica sand, cement, and lime, AAC wall panels are porous concrete products cured under high temperature, high pressure, and steam. They possess excellent sound insulation and absorption properties, as well as good thermal insulation performance. With a lightweight ratio of 0.5, which is only 1 / 4 that of ordinary concrete, they significantly reduce the self-weight of the walls and lower the cost of building foundations. Products include exterior wall panels, interior wall panels, floor slabs, and roof panels.
[0003] The existing autoclaved aerated concrete wall panels have low overall strength and poor compressive strength, which makes them prone to cracking and affects the service life of the wall. Utility Model Content
[0004] The purpose of this invention is to provide a crack-resistant and reinforced autoclaved aerated concrete wall panel that can improve the overall strength and compressive strength of the wall panel, reduce the risk of cracking, and extend the service life of the wall panel.
[0005] To solve the above-mentioned technical problems, the present invention adopts the following solution:
[0006] A crack-resistant reinforced autoclaved aerated concrete wall panel includes an autoclaved aerated concrete layer composed of fiber and concrete. The autoclaved aerated concrete layer contains three layers of mesh fiber cement bars distributed from top to bottom. A first concave arc-shaped fiber cement bar is provided between the upper and middle mesh fiber cement bars, and a second concave arc-shaped fiber cement bar is provided between the middle and lower mesh fiber cement bars. The first and second arc-shaped fiber cement bars are symmetrically distributed about the middle mesh fiber cement bar.
[0007] Optionally, the upper end of the first arc-shaped fiber cement bar is integrally formed with the upper layer of mesh fiber cement bar, and the lower end is integrally formed with the middle layer of mesh fiber cement bar; the upper end of the second arc-shaped fiber cement bar is integrally formed with the middle layer of mesh fiber cement bar, and the lower end is integrally formed with the lower layer of mesh fiber cement bar.
[0008] Optionally, multiple of the first and second arc-shaped fiber cement bars are distributed in an array.
[0009] Optionally, a plurality of first tensile bars are distributed on the outer side wall of the first arc-shaped fiber cement bar, located on both sides of the arc apex. The ends of the first tensile bars away from the first arc-shaped fiber cement bar are provided with first tensile heads, and the cross-sectional area of the first tensile heads is larger than the cross-sectional area of the first tensile bars.
[0010] Optionally, the plurality of first tensile reinforcements are vertically distributed on the outer wall of the first arc-shaped fiber cement reinforcement, and the length of the first tensile reinforcements gradually increases from the top of the arc to both sides.
[0011] Optionally, a plurality of second tensile bars are distributed on the outer wall of the second arc-shaped fiber cement bar, located on both sides of the arc apex. The ends of the second tensile bars away from the second arc-shaped fiber cement bar are provided with second tensile heads, and the cross-sectional area of the second tensile heads is larger than the cross-sectional area of the second tensile bars.
[0012] Optionally, the plurality of second tensile reinforcements are vertically distributed on the outer wall of the second arc-shaped fiber cement reinforcement, and the length of the second tensile reinforcements gradually increases from the top of the arc to both sides.
[0013] Optionally, the top and bottom surfaces of the autoclaved aerated concrete layer are respectively provided with thermal insulation layers.
[0014] Optionally, the outer side of the thermal insulation layer is provided with a fiber cement board layer or a decorative panel layer.
[0015] Optionally, the top surface of the upper layer of mesh fiber cement reinforcement has multiple first limiting posts integrally formed, which extend upward through the thermal insulation layer into the upper fiber cement board layer; the bottom surface of the lower layer of mesh fiber cement reinforcement has multiple second limiting posts integrally formed, which extend downward through the thermal insulation layer into the lower fiber cement board layer.
[0016] The beneficial effects of this utility model are as follows: Compared with existing autoclaved aerated concrete wall panels, this utility model uses autoclaved aerated fiber concrete wall panels, which initially improves strength and compressive strength. Simultaneously, the upper and lower mesh fiber cement reinforcements inside the wall panel can withstand tensile stress at the top and bottom of the wall panel, preventing transverse cracks caused by upper and lower loads or temperature changes. The middle mesh fiber cement reinforcements, through their connection with the upper and lower meshes, disperse stress and transfer loads, while simultaneously enhancing the overall rigidity of the wall panel.
[0017] The stress buffering effect of two symmetrical arc-shaped fiber cement bars: the first arc-shaped fiber cement bar (concave) is located between the upper and middle mesh layers, and its arc design converts the tensile stress in the upper part into the axial pressure of the arc bar, reducing stress concentration. The second arc-shaped fiber cement bar (concave) is located between the middle and lower mesh layers, symmetrically distributed with the first arc bar, forming a stress transfer path, further dispersing the load and inhibiting crack propagation.
[0018] When cracks appear, the mesh fiber cement reinforcement spans both sides of the crack, preventing the crack from expanding further through friction and mechanical interlocking. The three-layer mesh + arc-shaped reinforcement structure disperses shrinkage stress throughout the wall panel, reducing the number of surface cracks. The plastic deformation of the arc-shaped reinforcement absorbs most of the temperature stress, preventing cracks from penetrating the wall panel. The addition of fibers improves the wall panel's impact resistance and reduces the connectivity of pores within the wall panel, thus improving its impermeability. Attached Figure Description
[0019] Figure 1 This is a structural diagram of the present invention;
[0020] Figure 2 This is a schematic diagram of a fiber-reinforced concrete mesh.
[0021] Reference numerals in the attached drawings: 1-Autoclaved aerated concrete layer, 2-Insulation layer, 3-Fiber cement board layer, 4-Grid fiber cement reinforcement, 5-First arc-shaped fiber cement reinforcement, 6-Second arc-shaped fiber cement reinforcement, 7-First limiting post, 8-Second limiting post, 9-First tensile reinforcement, 10-First tensile head, 11-Second tensile reinforcement, 12-Second tensile head. Detailed Implementation
[0022] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.
[0023] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0025] Example
[0026] A crack-resistant reinforced autoclaved aerated concrete wall panel includes an autoclaved aerated concrete layer 1, which is formed by mixing fibers and concrete. The autoclaved aerated concrete layer 1 has three layers of mesh fiber cement bars 4 distributed from top to bottom. A first concave arc-shaped fiber cement bar 5 is provided between the upper mesh fiber cement bar 4 and the middle mesh fiber cement bar 4. A second concave arc-shaped fiber cement bar 6 is provided between the middle mesh fiber cement bar 4 and the lower mesh fiber cement bar 4. The first arc-shaped fiber cement bar 5 and the second arc-shaped fiber cement bar 6 are symmetrically distributed about the middle mesh fiber cement bar 4.
[0027] In this embodiment, as Figure 1 and Figure 2 As shown, autoclaved aerated concrete wall panels are used, which initially improve strength and compressive strength. The addition of fibers (basalt fiber, alkali-resistant glass fiber, etc.) improves the impact toughness of the wall panels, and the fiber incorporation reduces the internal pore connectivity of the wall panels, thus improving impermeability.
[0028] The upper and lower layers of fiber-reinforced cement mesh 4 inside the wall panel can withstand the tensile stress at the top and bottom of the wall panel, preventing transverse cracks caused by upper and lower loads or temperature changes. The middle layer of fiber-reinforced cement mesh 4, through its connection with the upper and lower mesh layers, disperses stress and transfers loads, while enhancing the overall rigidity of the wall panel.
[0029] The stress buffering effect of two symmetrical arc-shaped fiber cement bars: the first arc-shaped fiber cement bar 5 (recessed downwards) is located between the upper and middle mesh layers. Through its arc design, it transforms the tensile stress in the upper part into the axial pressure of the arc-shaped bar, reducing stress concentration. The second arc-shaped fiber cement bar 6 (recessed upwards) is located between the middle and lower mesh layers, symmetrically distributed with the first arc-shaped fiber cement bar 5, forming a stress transfer path, further dispersing the load and inhibiting crack propagation.
[0030] When cracks appear, the mesh fiber cement reinforcement 4 spans both sides of the crack, preventing the crack from expanding further through friction and mechanical interlocking. The three-layer mesh + arc-shaped reinforcement structure disperses the shrinkage stress to the entire wall panel, reducing the number of surface cracks. The plastic deformation of the arc-shaped reinforcement absorbs most of the temperature stress, preventing cracks from penetrating the wall panel.
[0031] Fiber cement reinforcement (a mixture of steel fiber or basalt fiber and cement) is similar in material to autoclaved aerated concrete layer 1, which can improve the connection strength between the two.
[0032] Furthermore, the upper end of the first arc-shaped fiber cement bar 5 is integrally formed with the upper layer of mesh fiber cement bar 4, and the lower end is integrally formed with the middle layer of mesh fiber cement bar 4; the upper end of the second arc-shaped fiber cement bar 6 is integrally formed with the middle layer of mesh fiber cement bar 4, and the lower end is integrally formed with the lower layer of mesh fiber cement bar 4.
[0033] Specifically, if the curved reinforcement and the mesh reinforcement are connected by welding or binding, stress concentration is likely to occur at the joints, causing cracks to initiate at the joints. When the curved reinforcement and the mesh reinforcement are formed through a single casting or spraying process, the material is continuous without breaks, resulting in more uniform stress transfer. Under stress, the curved section of the integrally formed curved reinforcement can form a plastic hinge, absorbing energy through bending deformation and reducing crack propagation. After the upper, middle, and lower mesh reinforcements are connected by the curved reinforcement, a three-dimensional spatial truss structure is formed, effectively limiting the lateral deformation of the core concrete and preventing spalling or cracking. The surface of the curved reinforcement can be designed with a rough surface (such as roughening or indentation) to increase the mechanical interlocking force between the fiber and the cementitious base, preventing the fiber from slipping or being pulled out in the curved section.
[0034] Furthermore, multiple of the first arc-shaped fiber cement bars 5 and the second arc-shaped fiber cement bars 6 are arrayed. Specifically, the multiple arc-shaped bars are arranged at regular intervals to form a dense support structure similar to a honeycomb. Under load, stress is transmitted synchronously through multiple arc-shaped bars, thereby avoiding localized damage. When the wall panel is bent, the arc-shaped segments of the bars undergo symmetrical deformation, forming a "self-balancing" system and reducing overall deflection.
[0035] Furthermore, a plurality of first tensile ribs 9 are distributed on the outer side wall of the first arc-shaped fiber cement bar 5, located on both sides of the arc top. The ends of the first tensile ribs 9 away from the first arc-shaped fiber cement bar 5 are provided with first tensile heads 10, and the cross-sectional area of the first tensile heads 10 is larger than the cross-sectional area of the first tensile ribs 9.
[0036] Furthermore, the plurality of first tensile reinforcements 9 are vertically distributed on the outer wall of the first arc-shaped fiber cement reinforcement 5, and the length of the first tensile reinforcements 9 gradually increases from the top of the arc to both sides.
[0037] Furthermore, multiple second tensile ribs 11 are distributed on the outer wall of the second arc-shaped fiber cement bar 6, located on both sides of the arc top. The ends of the second tensile ribs 11 away from the second arc-shaped fiber cement bar 6 are provided with second tensile heads 12, and the cross-sectional area of the second tensile heads 12 is larger than the cross-sectional area of the second tensile ribs 11.
[0038] Furthermore, the plurality of second tensile reinforcements 11 are vertically distributed on the outer wall of the second arc-shaped fiber cement reinforcement 6, and the length of the second tensile reinforcements 11 gradually increases from the top of the arc to both sides.
[0039] Specifically, the bottom surface of the first arc-shaped fiber cement bar 5 is distributed with multiple first tensile bars 9 of varying lengths. The ends of the first tensile bars 9 away from the first arc-shaped fiber cement bar 5 are provided with first tensile heads 10. The bottom surface of the second arc-shaped fiber cement bar 6 is distributed with multiple second tensile bars of varying lengths. The ends of the second tensile bars 11 away from the second arc-shaped fiber cement bar 6 are provided with second tensile heads 12. The first tensile bars 9 and the first tensile heads 10, as well as the second tensile bars 11 and the second tensile heads 12, can enhance the mechanical interlocking ability with the autoclaved aerated concrete layer 1, thereby improving the load-bearing capacity and crack resistance.
[0040] Furthermore, the top and bottom surfaces of the autoclaved aerated concrete layer 1 are respectively provided with thermal insulation layers 2.
[0041] Furthermore, the outer side of the thermal insulation layer 2 is provided with a fiber cement board layer 3 or a decorative panel layer.
[0042] Specifically, the thermal insulation layer 2 is set on the top and bottom surfaces of the autoclaved aerated concrete layer 1, forming a "symmetrical" thermal resistance distribution. This design balances the temperature gradient on both sides of the wall panel, avoiding the thermal bridging effect caused by unilateral insulation. The thermal insulation layer 2 can be made of polystyrene board (EPS / XPS), rock wool board, etc. Fiber cement board, as the outer layer, can resist mechanical impact (such as handling collisions), ultraviolet aging, and chemical corrosion (such as acid rain erosion), effectively protecting the inner insulation layer from damage. Fiber cement board is a Class A non-combustible material (GB 8624-2012), maintaining structural integrity at 1000℃, preventing the spread of fire to the insulation layer. Simultaneously, its water absorption rate is ≤10% (after 24 hours of immersion), preventing the thermal conductivity of the insulation layer from increasing due to water absorption. The outer side of the thermal insulation layer 2 can also be a decorative panel layer, thus integrating load-bearing, insulation, and decoration into the wall panel.
[0043] Furthermore, the top surface of the upper layer of mesh fiber cement reinforcement 4 is integrally formed with multiple first limiting posts 7, which extend upward through the thermal insulation layer 2 into the upper fiber cement board layer 3. The bottom surface of the lower layer of mesh fiber cement reinforcement 4 is integrally formed with multiple second limiting posts 8, which extend downward through the thermal insulation layer 2 into the lower fiber cement board layer 3.
[0044] Specifically, blind holes matching the size and position of the first limiting post 7 are pre-drilled on the bottom surface of the upper fiber cement board layer 3, and blind holes matching the size and position of the second limiting post 8 are pre-drilled on the top surface of the lower fiber cement board layer 3. Through holes matching the size and position of the first limiting post 7 and the second limiting post 8 are also pre-drilled on the thermal insulation layer 2. During installation, the thermal insulation layer 2 is first directly bonded to the upper and lower surfaces of the autoclaved aerated concrete layer 1, with the limiting posts passing through the through holes. Then, the fiber cement board... Layer 3 is bonded to the outside of the thermal insulation layer 2. The first limiting post 7 and the second limiting post 8 are respectively inserted into the blind holes of the upper and lower corresponding fiber cement board layers 3. The blind holes, through holes and the surface of the limiting posts are coated with adhesive. The limiting posts can restrict the relative slippage and misalignment between the fiber cement board layer 3 and the thermal insulation layer 2, and also restrict the relative slippage and misalignment between the thermal insulation layer 2 and the autoclaved aerated concrete layer 1. At the same time, they also serve to position the fiber cement board layer 3 and the thermal insulation layer 2 during installation.
[0045] 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 way. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments based on the technical essence of the present utility model and within the spirit and principles of the present utility model shall still fall within the protection scope of the present utility model.
Claims
1. A crack-resistant reinforced autoclaved aerated concrete wall panel, characterized in that, The material includes an autoclaved aerated concrete layer (1) made of fiber and concrete. The autoclaved aerated concrete layer (1) has three layers of mesh fiber cement bars (4) distributed from top to bottom. A first concave arc-shaped fiber cement bar (5) is provided between the upper mesh fiber cement bar (4) and the middle mesh fiber cement bar (4). A second concave arc-shaped fiber cement bar (6) is provided between the middle mesh fiber cement bar (4) and the lower mesh fiber cement bar (4). The first arc-shaped fiber cement bar (5) and the second arc-shaped fiber cement bar (6) are symmetrically distributed about the middle mesh fiber cement bar (4).
2. A crack resistant reinforced autoclaved aerated concrete wall panel according to claim 1, characterized in that, The upper end of the first arc-shaped fiber cement bar (5) is integrally formed with the upper layer of mesh fiber cement bar (4), and the lower end is integrally formed with the middle layer of mesh fiber cement bar (4); the upper end of the second arc-shaped fiber cement bar (6) is integrally formed with the middle layer of mesh fiber cement bar (4), and the lower end is integrally formed with the lower layer of mesh fiber cement bar (4).
3. A crack resistant reinforced autoclaved aerated concrete wall panel according to claim 2, characterized in that, Multiple of the first arc-shaped fiber cement bar (5) and the second arc-shaped fiber cement bar (6) are distributed in an array.
4. The reinforced autoclaved aerated concrete wall panel according to claim 3, wherein Multiple first tensile bars (9) are distributed on the outer side wall of the first arc-shaped fiber cement bar (5) located on both sides of the arc top. The ends of the first tensile bars (9) away from the first arc-shaped fiber cement bar (5) are provided with first tensile heads (10). The cross-sectional area of the first tensile heads (10) is larger than the cross-sectional area of the first tensile bars (9).
5. The crack-resistant reinforced autoclaved aerated concrete wall panel according to claim 4, characterized in that, The plurality of first tensile reinforcements (9) are vertically distributed on the outer wall of the first arc-shaped fiber cement reinforcement (5), and the length of the first tensile reinforcements (9) gradually increases from the top of the arc to both sides.
6. The reinforced anti-cracking autoclaved aerated concrete wall panel according to claim 3, wherein Multiple second tensile bars (11) are distributed on the outer wall of the second arc-shaped fiber cement bar (6) on both sides of the arc top. The ends of the second tensile bars (11) away from the second arc-shaped fiber cement bar (6) are provided with second tensile heads (12). The cross-sectional area of the second tensile heads (12) is larger than the cross-sectional area of the second tensile bars (11).
7. A crack resistant reinforced autoclaved aerated concrete wall panel according to claim 6, characterized in that The plurality of second tensile reinforcements (11) are vertically distributed on the outer wall of the second arc-shaped fiber cement reinforcement (6), and the length of the second tensile reinforcements (11) gradually increases from the top of the arc to both sides.
8. The reinforced anti-cracking autoclaved aerated concrete wall panel according to claim 1, wherein, The top and bottom surfaces of the autoclaved aerated concrete layer (1) are respectively provided with thermal insulation layers (2).
9. The crack-resistant reinforced autoclaved aerated concrete wall panel according to claim 8, characterized in that, The thermal insulation layer (2) is provided with a fiber cement board layer (3) or a decorative panel layer on the outside.
10. The reinforced anti-cracking autoclaved aerated concrete wall panel according to claim 1, wherein The top surface of the upper layer of mesh fiber cement reinforcement (4) is integrally formed with multiple first limiting posts (7), which extend upward through the thermal insulation layer (2) to the upper fiber cement board layer (3). The bottom surface of the lower layer of mesh fiber cement reinforcement (4) is integrally formed with multiple second limiting posts (8), which extend downward through the thermal insulation layer (2) to the lower fiber cement board layer (3).