Cement-based polymer and AAC combined external wall internal corner connecting structure

Abstract

The utility model discloses a cement-based polymer and AAC combined external wall internal corner connecting structure which comprises two external wall panels, each external wall panel comprises a combined wall body which fixedly connects an AAC board and a cement-based polymer into a whole, and the combined wall body forms a coating layer structure on the surface of one or more AAC boards arranged side by side through the cement-based polymer. The cement-based polymer in the external wall boards at least wraps the side face of the AAC board and one wall face to form a waterproof layer, the wall face, covered with the cement-based polymer, of the external wall boards is an outer wall face, the two external wall boards are the first external wall board and the second external wall board respectively, and a vertical through groove is formed in the side end of the first external wall board. Vertical through grooves are also formed in the outer wall face of the second outer wall board, the side end of the first outer wall board is attached to the outer wall face of the second outer wall board, an internal corner is formed between the outer wall faces, the two vertical through grooves are spliced to form an internal corner cast-in-place space, and cement-based polymers are poured in the internal corner cast-in-place space.

Description

[0001] Priority reference

[0002] This application claims priority to Chinese patent application CN2024216317449 (titled “A prefabricated cement-based polymer and AAC composite floor system”), filed on July 10, 2024. Technical Field

[0003] This utility model relates to the field of prefabricated buildings, specifically to a cement-based polymer and AAC composite exterior wall internal corner connection structure. Background Technology

[0004] AAC is an abbreviation for Autoclaved Aerated Concrete, a lightweight, porous new type of building material. AAC material is made from raw materials such as silica sand, cement, lime, and gypsum through processes including batching, mixing, pouring, pre-curing, cutting, and high-pressure autoclaving. During production, the addition of foaming agents such as aluminum powder creates numerous uniformly distributed closed micropores within the concrete, significantly reducing the material's density, improving thermal insulation performance, and maintaining high strength. AAC material boasts numerous advantages, including light weight, high strength, excellent thermal insulation, superior sound insulation, excellent seismic performance, convenient construction, and environmental sustainability. It is widely used in various building structures such as walls, floors, roofs, and fire-resistant walls. In the modern construction industry, AAC is increasingly being used and promoted as a green and energy-saving building material. AAC panels are lightweight, provide thermal insulation, fire resistance, sound insulation, are environmentally friendly, easy to construct, economical, and recyclable, making them widely used in modern construction. However, due to its porous structure, it has poor waterproof and moisture-proof performance. As a wall material, it can only be used as an interior infill wall and cannot be used as an exterior wall of a building. Furthermore, its seismic performance is poor after assembly, which greatly limits its use in load-bearing walls.

[0005] This paper proposes a novel technology that combines AAC (aluminum cementitious polymer) with cement-based polymers to form wall panels. The cement-based polymer forms a coating layer on the surface of one or more AAC panels, resulting in a composite wall that significantly improves waterproofing and structural strength compared to single AAC wall panels, while retaining many of AAC's advantages. This makes it a promising new type of prefabricated building material. However, current technologies lack practical application techniques for this composite wall, and there is no reference for the corner structure when used as an exterior wall. Therefore, there is an urgent need for a corner construction technology for this cement-based polymer and AAC composite exterior wall. Utility Model Content

[0006] The present invention aims to provide a corner connection structure for cement-based polymer and AAC composite exterior walls to achieve corner connection between cement-based polymer and AAC composite exterior walls.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a cement-based polymer and AAC combined exterior wall corner connection structure, comprising two exterior wall panels, each exterior wall panel comprising a combined wall body that fixes the AAC board and cement-based polymer together, the combined wall body forming a coating layer structure on the surface of one or more parallel AAC boards through the cement-based polymer, the cement-based polymer in the exterior wall panel covering at least one side of the AAC board and one wall surface to form a waterproof layer, the wall surface after the exterior wall panel is covered by the cement-based polymer is the exterior wall surface, the two exterior wall panels are respectively a first exterior wall panel and a second exterior wall panel, the side end of the first exterior wall panel is provided with a vertical through groove, the exterior wall surface of the second exterior wall panel is also provided with a vertical through groove, the side end of the first exterior wall panel abuts against the exterior wall surface of the second exterior wall panel, so that an inside corner is formed between the exterior wall surfaces, the two vertical through grooves are joined together to form a cast-in-place space for the inside corner, and cement-based polymer is cast in the cast-in-place space for the inside corner.

[0008] Preferably, as an improvement, the thickness of the waterproof layer formed by the cement-based polymer is 2-4 mm.

[0009] Preferably, as an improvement, the vertical through-groove on the first outer wall panel is set against the waterproof layer, so that the waterproof layer on the outer wall surface serves as the sidewall of the vertical through-groove.

[0010] Preferably, as an improvement, the inner wall surface of the first outer wall panel is aligned with the side end of the second outer wall panel.

[0011] Preferably, as an improvement, the depth of the vertical through groove is 20-40mm.

[0012] Preferably, as an improvement, the width of the vertical through groove is 10-20mm.

[0013] The principle and advantages of this solution are as follows: In practical application, the main body of the exterior wall panel consists of a central AAC board and a cast-in-place cement-based polymer layer. The cement-based polymer improves the waterproof and seepage-resistant performance of the exterior wall panel and enhances its overall structural strength, resulting in better earthquake and crack resistance. Simultaneously, the internal AAC board ensures that the overall weight of the exterior wall panel is lighter than traditional and other exterior wall panels under the same conditions, and it also features thermal insulation, heat insulation, fire resistance, sound insulation, environmental friendliness, convenient construction, and good economic efficiency. The waterproof layer formed by the cement-based polymer creates a recessed corner between the exterior wall panels. Vertical grooves are then machined at the joints of the exterior wall panels, and the vertical grooves on two exterior wall panels are joined to form a cast-in-place space. The cast-in-place cement-based polymer then forms the connection structure for the recessed corner. The two exterior wall panels are connected using a mortise and tenon joint similar to a wooden structure, and the cast-in-place cement-based polymer fills and seals the recessed corner joint. The cement-based polymer maintains consistency with the waterproofing layer material, so that the cast-in-place cement-based polymer and the waterproofing layer of the exterior wall panel form an integral whole. This ensures a strong bond between two adjacent exterior wall panels. The resulting cement-based polymer and AAC combined exterior wall corner structure has better overall structural stability, higher structural strength, better seismic and crack resistance, better durability, better sealing, and better waterproof and windproof performance, eliminating the risk of leakage. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0015] Figure 2 This is a schematic diagram of the structure of the outer wall panel in an embodiment of this utility model. Detailed Implementation

[0016] The following detailed description illustrates the specific implementation method:

[0017] The reference numerals in the accompanying drawings include: 1. First exterior wall panel; 2. Second exterior wall panel; 3. Vertical through groove; 4. Waterproof layer; 5. AAC board.

[0018] The basic implementation examples are as follows: Figure 1The diagram illustrates a cement-based polymer and AAC composite exterior wall corner connection structure, comprising two exterior wall panels. Each exterior wall panel includes three parallel AAC panels 5 fixed together on their surfaces using a cement-based polymer. The cement-based polymer completely covers the sides of the AAC panels 5 and one wall surface within the exterior wall panel, forming a waterproof layer 4 with a thickness of 2-4 mm. The wall surface covered by the cement-based polymer is the exterior wall surface. The two exterior wall panels are designated as a first exterior wall panel 1 and a second exterior wall panel 2. A vertical through-groove 3 is formed on the side end of the first exterior wall panel 1, and this groove 3 is positioned against the waterproof layer 4, making the waterproof layer 4 the sidewall of the vertical through-groove 3. A vertical through-groove 3 is also formed on the exterior wall surface of the second exterior wall panel 2. The depth of the vertical through-groove 3 is 20-40 mm, and the width of the vertical through-groove 3 is 10-20 mm. The side end of the first outer wall panel 1 is attached to the outer wall surface of the second outer wall panel 2, and the inner wall surface of the first outer wall panel 1 is aligned with the side end of the second outer wall panel 2, so that an inward corner is formed between the outer wall surfaces. The two vertical through grooves 3 are joined together to form an inward corner cast-in-place space, and cement-based polymer is poured into the inward corner cast-in-place space.

[0019] Cement-based polymers are one of ultra-high performance concrete, ultra-high performance fiber-reinforced concrete, self-compacting high performance concrete, or polymer fiber-reinforced cement-based composite materials.

[0020] The specific implementation process is as follows: AAC board 5 and cement-based polymer are prefabricated in the workshop to form exterior wall panels, and the vertical through grooves 3 are grooved in the workshop. Then, they are transported to the construction site as wall panel units for prefabricated buildings to construct the exterior walls. During the construction process, when building the corner of the exterior wall, the side walls and exterior wall surfaces of the corresponding exterior wall panels are cleaned. Then, the exterior wall panels are hoisted to the predetermined position, and the posture of the exterior wall panels is adjusted so that the two exterior wall panels are arranged at right angles. After positioning, the side ends of the first exterior wall panel 1 are aligned with the side ends of the second exterior wall panel 2 and abut against the exterior wall surface of the second exterior wall panel 2. The vertical through grooves 3 on the first exterior wall panel 1 and the second exterior wall panel 2 enclose a square column-shaped in-situ cast-in-place space at the corner. Then, cement-based polymer is poured in the in-situ space of the internal corner. The cement-based polymer is consistent with the material of the waterproof layer 4 to ensure that the internal corner between two adjacent exterior wall panels is firmly bonded. The cement-based polymer and the AAC combined exterior wall external corner structure have better overall structural stability, higher structural strength, better seismic and crack resistance, better durability, better sealing, better waterproof and windproof performance, and no risk of leakage.

[0021] The main body of the exterior wall panel consists of a central AAC board 5 and a cast-in-place cement-based polymer waterproof layer 4. The cement-based polymer improves the waterproof and seepage-resistant performance of the exterior wall panel and enhances its overall structural strength, resulting in better earthquake and crack resistance. Simultaneously, the internal AAC board ensures that the overall weight of the exterior wall panel is lighter than traditional and other exterior wall panels under the same conditions, and it also features thermal insulation, heat insulation, fire resistance, sound insulation, environmental friendliness, convenient construction, and good economy. The waterproof layer 4 formed by the cement-based polymer creates a recessed corner between the exterior wall panels. Vertical grooves 3 are then machined at the joints of the exterior wall panels, and the vertical grooves 3 on two exterior wall panels are joined to form a cast-in-place space. The cast-in-place cement-based polymer then forms the connection structure for the recessed corner. The two exterior wall panels are connected using a mortise and tenon joint similar to a wooden structure, and the cast-in-place cement-based polymer fills and seals the recessed corner joint. The cement-based polymer and the waterproof layer 4 are made of the same material. In this way, the cast-in-place cement-based polymer and the waterproof layer 4 of the exterior wall panel are integrated, which can ensure a firm bond between two adjacent exterior wall panels. The cement-based polymer and the AAC combined exterior wall corner structure have better overall structural stability, higher structural strength, better seismic and crack resistance, better durability, better sealing, better waterproof and windproof performance, and no risk of leakage.

[0022] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A cement-based polymer and AAC composite exterior wall corner connection structure, characterized in that: The system includes two exterior wall panels. Each exterior wall panel comprises a composite wall structure in which AAC panels and cement-based polymer are integrally bonded. The composite wall structure forms a coating layer structure on the surface of one or more parallel AAC panels through the cement-based polymer. The cement-based polymer in the exterior wall panel covers at least one side of the AAC panel and one wall surface to form a waterproof layer. The wall surface covered by the cement-based polymer is the exterior wall surface. The two exterior wall panels are a first exterior wall panel and a second exterior wall panel. A vertical through groove is opened on the side end of the first exterior wall panel, and a vertical through groove is also opened on the exterior wall surface of the second exterior wall panel. The side end of the first exterior wall panel is attached to the exterior wall surface of the second exterior wall panel, so that an inward corner is formed between the exterior wall surfaces. The two vertical through grooves are joined together to form an inward corner cast-in-place space, and cement-based polymer is poured into the inward corner cast-in-place space.

2. The cement-based polymer and AAC composite exterior wall corner connection structure according to claim 1, characterized in that: The thickness of the waterproof layer formed by cement-based polymer is 2-4 mm.

3. The external wall corner connection structure of cement-based polymer and AAC combination according to claim 2, characterized in that: The vertical grooves on the first exterior wall panel are set against the waterproof layer, so that the exterior wall waterproof layer serves as the sidewall of the vertical grooves.

4. The cement-based polymer and AAC composite exterior wall corner connection structure according to claim 3, characterized in that: The inner wall surface of the first exterior wall panel is aligned with the side end of the second exterior wall panel.

5. The cement-based polymer and AAC composite exterior wall corner connection structure according to claim 4, characterized in that: The depth of the vertical through groove is 20-40mm.

6. The cement-based polymer and AAC composite exterior wall corner connection structure according to claim 5, characterized in that: The width of the vertical through groove is 10-20mm.

Images