Building outer wall capable of preventing plastering cracking
By reinforcing the large window openings of the ALC panels with embedded steel square tube structures and combining them with waterproof rubber pads, the problem of plaster cracking caused by the difference in thermal expansion coefficients between the steel structure and the ALC panels was solved, thereby improving the waterproof performance and structural stability of the building's exterior walls.
Patent Information
- Application Number
- CN202520486145.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-19
AI Technical Summary
The steel structure and ALC panels have different coefficients of thermal expansion when the external temperature changes, resulting in large differences in temperature deformation. This causes cracks in the plaster layer of the exterior wall, affecting the building's appearance and waterproofing performance. Furthermore, traditional reinforcement methods expose the steel structure to the external environment, further exacerbating the risk of cracking.
Thick ALC panels are used to reinforce large window openings. A steel square tube structure is embedded in the interior and covered with ALC outer strip panels. Waterproof rubber pads are used to prevent the steel structure from being exposed, forming an embedded reinforcement structure that prevents the steel structure from being corroded by moisture.
It effectively supports the weight of large windows, prevents plaster layer cracking, improves building waterproofing performance, protects steel structure from external environmental influences, and extends service life.
Smart Images

Figure CN223937401U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building construction technology, specifically to a building exterior wall that prevents plaster cracking. Background Technology
[0002] Autoclaved aerated concrete (AAC) panels are made primarily from cement, lime, and silica sand, with varying amounts of corrosion-resistant steel mesh added according to structural requirements. They are then produced through high-temperature, high-pressure, and steam curing processes. AAC panels have a porous crystalline structure, low density, and excellent fire resistance, sound insulation, heat insulation, and thermal insulation properties. With rising labor costs, AAC panels are gradually replacing traditional aerated concrete blocks.
[0003] While ALC (Alternating Current Carbide) panels are widely used in interior walls, their application in exterior walls is still relatively immature. When ALC panels are used on exterior walls, especially for reinforcing large window openings, steel structures are typically employed. However, due to the different coefficients of thermal expansion of the steel structure and ALC panels, temperature deformation varies significantly with external temperature changes. This difference can cause cracking in the exterior plaster layer, affecting the building's appearance and waterproofing. Furthermore, in traditional exterior wall reinforcement methods, the steel structure is directly exposed to the wall surface, making it susceptible to environmental influences and further exacerbating the risk of temperature deformation and plaster layer cracking. To address these issues, this invention provides a building exterior wall design that prevents plaster cracking. Utility Model Content
[0004] To address the shortcomings of existing technologies, this invention provides a building exterior wall design that prevents plaster cracking. It solves the problem of significant temperature deformation differences between steel structures and ALC panels due to their different coefficients of thermal expansion. This difference can cause cracking in the exterior wall plaster layer, affecting the building's appearance and waterproofing performance. Furthermore, in traditional exterior wall reinforcement methods, the steel structure is directly exposed to the exterior wall surface, making it susceptible to environmental influences and further exacerbating the risk of temperature deformation and plaster layer cracking.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a building exterior wall designed to prevent plaster cracking, comprising a thick ALC panel. A window opening is provided at the center of the thick ALC panel. The window opening is fitted with a steel square tube structure, an ALC outer strip, and a waterproof rubber pad. The steel square tube structure is fixedly installed on the wall of the window opening, with the interior side facing the wall to support and reinforce the window opening. The ALC outer strip is fixedly connected to the outer end of the steel square tube structure, with the exterior side facing the wall to prevent the steel square tube structure from being exposed to the outdoor environment. The waterproof rubber pad is positioned between the steel square tube structure and the ALC outer strip to prevent the steel square tube structure from being damaged by moisture.
[0006] Preferably, structural beams are fixedly installed at both the top and bottom of the thick ALC plate, and the thick ALC plate is arranged vertically.
[0007] Preferably, the bottom of the steel square tube structure is provided with a bottom support plate, which is used to support the steel square tube structure, and the bottom support plate is also made of ALC material.
[0008] Preferably, the steel square tube structure includes vertical steel square tubes and horizontal steel square tubes, and two sets of each type of steel square tube are provided. The two sets of horizontal steel square tubes are fixedly connected between the two sets of vertical steel square tubes, and connecting holes are provided on both the vertical and horizontal steel square tubes.
[0009] Preferably, the ALC outer strip also includes vertical strips and horizontal strips, and two sets of vertical strips and horizontal strips are provided. The vertical strips are fixedly connected to the vertical steel square tube, and the horizontal strips are fixedly connected to the horizontal steel square tube. Both the vertical strips and the horizontal strips are provided with connecting through holes.
[0010] Preferably, the connecting hole of the steel square tube structure is threaded with a long self-tapping screw, and the ALC outer strip is fixedly connected to the steel square tube structure by the long self-tapping screw.
[0011] Preferably, an inner protective plate is installed and connected to the inner side of the steel square tube structure, and the inner protective plate is used to protect the steel square tube structure indoors.
[0012] This utility model discloses a building exterior wall that prevents plaster cracking, which has the following beneficial effects: the building exterior wall that prevents plaster cracking uses steel structure square tubes to reinforce large window openings, effectively supporting the weight of large windows; the steel structure is not exposed to the outside through ALC outer strips, solving the problem of plaster cracking caused by changes in external temperature; and waterproof rubber pads prevent outdoor moisture from penetrating the steel structure and causing damage. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0014] Figure 1 This is a schematic diagram of the overall external front structure of this utility model;
[0015] Figure 2 This is a schematic diagram of the overall exploded structure of this utility model;
[0016] Figure 3 This is a schematic diagram of the overall structure of the steel square tube of this utility model.
[0017] In the diagram: 1. Structural beam; 2. Thick ALC plate; 3. ALC outer strip; 31. Vertical strip; 32. Horizontal strip; 33. Connecting through hole; 4. Window opening; 5. Bottom support plate; 6. Steel square tube structure; 61. Vertical steel square tube; 62. Horizontal steel square tube; 63. Connecting hole; 7. Waterproof rubber gasket; 8. Long self-tapping screw; 9. Inner protective thin plate. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0019] This application provides a building exterior wall design to prevent plaster cracking. It addresses the significant temperature deformation differences between the steel structure and ALC panels due to their different coefficients of thermal expansion. This difference can cause cracking in the plaster layer, affecting the building's appearance and waterproofing. Furthermore, in traditional exterior wall reinforcement methods, the steel structure is directly exposed to the exterior wall surface, making it susceptible to environmental influences and further exacerbating the risk of temperature deformation and plaster layer cracking.
[0020] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.
[0021] This utility model discloses a building exterior wall that prevents plaster cracking.
[0022] Example 1
[0023] According to the appendix Figure 1-3 As shown,
[0024] The system includes a thick ALC panel 2, with a window opening 4 at its center. The window opening 4 is fitted with a steel square tube structure 6, an ALC outer strip 3, and a waterproof rubber pad 7. The steel square tube structure 6 is fixedly installed on the wall of the window opening 4, facing the interior, to support and reinforce the window opening 4. The ALC outer strip 3 is fixedly connected to the outer end of the steel square tube structure 6, facing the exterior, to prevent the steel square tube structure 6 from being exposed to the outdoor environment. The waterproof rubber pad 7 is placed between the steel square tube structure 6 and the ALC outer strip 3 to prevent the steel square tube structure 6 from being corroded by moisture.
[0025] Structural beams 1 are fixedly installed at both the top and bottom of the thick ALC plate 2, and the thick ALC plate 2 is arranged vertically.
[0026] The bottom of the steel square tube structure 6 is provided with a bottom support plate 5, which is used to support the steel square tube structure 6. The bottom support plate 5 is also made of ALC material.
[0027] The steel square tube structure 6 includes vertical steel square tubes 61 and horizontal steel square tubes 62. There are two sets of both vertical steel square tubes 61 and horizontal steel square tubes 62. The two sets of horizontal steel square tubes 62 are fixedly connected between the two sets of vertical steel square tubes 61. Both vertical steel square tubes 61 and horizontal steel square tubes 62 are provided with connecting holes 63.
[0028] By installing an ALC outer strip 3 on the outside of the steel square tube structure 6, the steel square tube structure 6 is not exposed to the exterior wall, and the exterior wall plaster will not crack due to changes in the external temperature. Furthermore, the waterproof performance of the steel square tube structure 6 is improved by installing a waterproof rubber pad 7 between the steel square tube structure 6 and the ALC outer strip 3.
[0029] Example 2
[0030] Based on Example 1, according to Appendix Figure 1-3 As shown,
[0031] The outer strip 3 of the ALC also includes vertical strip 31 and horizontal strip 32. Both vertical strip 31 and horizontal strip 32 are provided in two sets. The vertical strip 31 is fixedly connected to the vertical steel square tube 61, and the horizontal strip 32 is fixedly connected to the horizontal steel square tube 62. Both the vertical strip 31 and the horizontal strip 32 are provided with connecting through holes 33.
[0032] The connecting hole 63 of the steel square tube structure 6 is internally threaded with a long self-tapping screw 8, and the ALC outer strip 3 is fixedly connected to the steel square tube structure 6 by the long self-tapping screw 8.
[0033] An inner protective plate 9 is installed and connected to the inside of the steel square tube structure 6. The inner protective plate 9 is used to protect the steel square tube structure 6 indoors.
[0034] By installing an inner protective thin plate 9 in the direction of contact between the steel square tube structure 6 and the interior, the steel square tube structure 6 will not be damaged during room decoration and daily life.
[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A building exterior wall for preventing plaster cracking, comprising thick ALC panels (2), characterized in that, A window opening (4) is provided at the center of the thick ALC plate (2), and the following are installed on the window opening (4): A steel square tube structure (6) is fixedly installed on the wall of the window opening (4). The steel square tube structure (6) is installed on the indoor side to support and reinforce the window opening (4). ALC outer strip (3), the ALC outer strip (3) is fixedly connected to the outer end of the steel square tube structure (6), the ALC outer strip (3) is installed on the outdoor side, so that the steel square tube structure (6) is not exposed to the outdoor environment; A waterproof rubber pad (7) is placed between the steel square tube structure (6) and the ALC outer strip (3) to prevent the steel square tube structure (6) from being corroded by moisture.
2. A building exterior wall for preventing plaster cracking according to claim 1, characterized in that: The thick ALC plate (2) is fixedly installed with structural beams (1) at both the top and bottom, and the thick ALC plate (2) is arranged vertically.
3. A building exterior wall for preventing plaster cracking according to claim 1, characterized in that: The bottom of the steel square tube structure (6) is provided with a bottom support plate (5), which is used to support the steel square tube structure (6). The bottom support plate (5) is also made of ALC material.
4. A building exterior wall for preventing plaster cracking according to claim 1, characterized in that: The steel square tube structure (6) includes a vertical steel square tube (61) and a horizontal steel square tube (62). Both the vertical steel square tube (61) and the horizontal steel square tube (62) are provided in two sets. The two sets of horizontal steel square tubes (62) are fixedly connected between the two sets of vertical steel square tubes (61). Both the vertical steel square tube (61) and the horizontal steel square tube (62) are provided with connecting holes (63).
5. A building exterior wall for preventing plaster cracking according to claim 4, characterized in that: The ALC outer strip (3) also includes a vertical strip (31) and a horizontal strip (32). There are two sets of both the vertical strip (31) and the horizontal strip (32). The vertical strip (31) is fixedly connected to the vertical steel square tube (61), and the horizontal strip (32) is fixedly connected to the horizontal steel square tube (62). Both the vertical strip (31) and the horizontal strip (32) are provided with connecting through holes (33).
6. A building exterior wall for preventing plaster cracking according to claim 5, characterized in that: The connecting hole (63) of the steel square tube structure (6) is threaded with a long self-tapping screw (8), and the ALC outer strip (3) is fixedly connected to the steel square tube structure (6) by the long self-tapping screw (8).
7. A building exterior wall for preventing plaster cracking according to claim 1, characterized in that: An inner protective plate (9) is installed and connected to the inner side of the steel square tube structure (6), and the inner protective plate (9) is used to protect the steel square tube structure (6) indoors.