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

Abstract

The utility model relates to the field of fabricated buildings, and discloses a cement-based polymer and AAC combined external wall external corner connecting structure which comprises at least two external wall panels, and each external wall panel comprises one or more side-by-side AAC panels which are fixedly connected into a whole through cement-based polymers on the surfaces. Cement-based polymers in the outer wall boards at least wrap the side face of the AAC board and one wall face to form a waterproof layer, the cement-based polymers form baffles at the left side end and the right side end of the AAC board, every two adjacent outer wall boards are arranged in an included angle mode so that the baffles and the side wall can define an external corner cast-in-place space, and the cement-based polymers are poured in the external corner cast-in-place space to form an external corner. According to the utility model, the cement-based polymer can be connected with the external corner of the AAC combined outer wall.

Description

[0001] Citation of priority

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

[0003] The utility model relates to the field of prefabricated buildings, in particular to a cement-based polymer and AAC combined exterior wall positive corner connection structure. Background Art

[0004] AAC, short for Autoclaved Aerated Concrete, is a new lightweight, porous building material. AAC is made from raw materials such as silica sand, cement, lime, and gypsum, through a process that includes batching, mixing, pouring, pre-curing, cutting, and autoclaving. During the production process, the addition of foaming agents such as aluminum powder creates a large number of evenly distributed, closed micropores within the concrete, significantly reducing the material's density and improving its thermal insulation properties while maintaining high strength. AAC offers numerous advantages, including light weight, high strength, excellent thermal insulation, superior sound insulation, superior seismic performance, easy construction, and environmental sustainability. It is widely used in various building structures, including walls, floor slabs, roof panels, and fireproof barriers. In the modern construction industry, AAC is gaining increasing application and popularity as a green, energy-saving building material. AAC panels are widely used in modern architecture due to their lightweight, thermal insulation, fire resistance, sound insulation, environmental friendliness, ease of construction, economical cost-effectiveness, and recyclability. However, due to its porous structural characteristics, its waterproof and moisture-proof properties are poor. When used as a wall material, it can currently only be used as indoor filling walls, but not as exterior walls of buildings. In addition, its seismic performance after assembly is poor, and its use in load-bearing walls is greatly limited.

[0005] A novel technology has been proposed that combines AAC with cement-based polymers to form wall panels. By coating the surface of one or more AAC panels with the cement-based polymer, the resulting composite wall significantly improves anti-seepage performance and structural strength compared to single AAC wall panels, while also incorporating many of the advantages of AAC. This represents a promising new type of prefabricated building material. However, the existing technology lacks practical application technology for this composite wall, and there are no references to the appropriate corner structures for exterior walls. Therefore, a corner construction technology for this cement-based polymer and AAC composite exterior wall is urgently needed. Utility Model Content

[0006] The utility model aims to provide a positive corner connection structure of a cement-based polymer and AAC combined exterior wall, so as to realize the corner connection of the cement-based polymer and AAC combined exterior wall.

[0007] To achieve the above-mentioned object, the present invention adopts the following technical solution: a cement-based polymer and AAC combined exterior wall positive corner connection structure, comprising at least two exterior wall panels, wherein the exterior wall panels include one or more side-by-side AAC panels fixedly connected as one on the surface with cement-based polymer, wherein the cement-based polymer in the exterior wall panels covers at least the side surfaces and one wall surface of the AAC panels to form a waterproof layer, wherein the cement-based polymer forms baffles at the left and right ends of the AAC panels, and the adjacent two exterior wall panels are arranged at an angle so that the baffles and the side walls enclose a positive corner cast-in-place space, and the cement-based polymer is poured in the positive corner cast-in-place space to form a positive corner.

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

[0009] Preferably, as an improvement, the baffle is parallel to and flush with the outer wall surface of the composite exterior wall panel.

[0010] Preferably, as an improvement, the width of the baffle is 50-250 mm.

[0011] Preferably, as an improvement, two adjacent exterior wall panels are arranged at right angles.

[0012] Preferably, as an improvement, the wall surface after the exterior wall panel is covered with the cement-based polymer is the exterior wall surface.

[0013] Preferably, as an improvement, the cement-based polymer is one of ultra-high performance concrete, ultra-high performance fiber-reinforced concrete, self-compacting high performance concrete or polymer fiber-reinforced cement-based composite material.

[0014] The principles and advantages of this solution are as follows: In practical application, the main exterior wall panel consists of a central AAC panel and a cast outer cementitious polymer layer. The cementitious polymer improves the waterproof and anti-seepage properties of the exterior wall panel's facade, enhancing the overall structural strength of the exterior wall panel, and providing better earthquake and crack resistance. Furthermore, the internal AAC panel ensures that the exterior wall panel is lighter than traditional and other exterior wall panels, while offering thermal insulation, fire resistance, sound insulation, environmental friendliness, ease of construction, and economical construction. A cementitious polymer baffle and waterproof layer are formed between the exterior wall panels to create the exterior corner space, which is then formed using cast-in-place cementitious polymer. This baffle is integral to the exterior wall panels, and the cementitious polymer in the exterior corner maintains consistency with the baffle and waterproof layer, ensuring a secure bond between adjacent exterior wall panels. The resulting exterior wall exterior corner structure, formed from a combination of cementitious polymer and AAC, offers improved overall structural stability, strength, earthquake and crack resistance, durability, sealing, waterproofing, and windproofing, eliminating the risk of leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model.

[0016] Figure 2 It is a schematic structural diagram of the exterior wall panel in an embodiment of the present utility model. DETAILED DESCRIPTION

[0017] The following is further described in detail through specific implementation methods:

[0018] The reference numerals in the drawings of the specification include: exterior wall panel 1, baffle 2, cast-in-place space at the positive corner 3, waterproof layer 4, and AAC board 5.

[0019] The embodiment is basically as shown in the attached Figure 1 As shown: A cement-based polymer and AAC combined exterior wall positive corner connection structure, comprising two exterior wall panels 1 arranged at right angles, the exterior wall panel 1 is a cement-based polymer and AAC combined wall panel, such as Figure 2 As shown, the exterior wall panel 1 comprises three side-by-side AAC panels 5, fixed together on their surfaces with a cement-based polymer. The cement-based polymer in the exterior wall panel 1 coats the sides of the AAC panels 5 and one wall surface, forming a waterproof layer 4. The surface of the exterior wall panel 1 covered with the cement-based polymer is the exterior wall surface. The cement-based polymer forms baffles 2 at the left and right ends of the AAC panels 5. The baffles 2 are parallel and flush with the exterior wall surface of the composite exterior wall panel 1. The thickness of the waterproof layer 4 and baffles 2 formed by the cement-based polymer is 2-4 mm, and the width of the baffles 2 is 50-250 mm. A cast-in-place space 3 for a positive corner is formed between two adjacent exterior wall panels 1, enclosed by the baffles 2 and the side walls. Cement-based polymer is poured into this cast-in-place space 3 to form the positive corner.

[0020] The cement-based polymer is 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.

[0021] The specific implementation process is as follows: AAC panels 5 and cement-based polymers are prefabricated in a workshop to form exterior wall panels 1. These panels are then transported to the construction site as prefabricated wall panels for the building's exterior walls. During construction, when constructing exterior wall corners, the baffles 2 and sidewalls of the corresponding exterior wall panels 1 are cleaned and pretreated. The surfaces can be roughened, scored, or coated with a surface agent. The exterior wall panels 1 are then hoisted to the desired location and adjusted so that the two panels 1 are arranged at right angles. Once positioned, the baffles 2 at the side ends of the two exterior wall panels 1 abut at right angles, enclosing the sidewalls of the two exterior wall panels 1 and the baffles 2 to form a square column-shaped, cast-in-place corner space 3. Then, a cement-based polymer is cast in the cast-in-place space 3 of the positive corner. The cast-in-place cement-based polymer maintains consistency with the material of the baffle 2 to ensure that the positive corners between the two adjacent exterior wall panels 1 are firmly bonded. The formed cement-based polymer and AAC combined exterior wall positive corner structure has better overall structural stability, high structural strength, good seismic and crack resistance, better durability, better sealing, good waterproof and windproof performance, and no risk of leakage.

[0022] The above description is merely an embodiment of the present invention, and the commonly known specific technical solutions and / or features of the solution are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be considered as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed in this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A cement-based polymer and AAC combined exterior wall positive corner connection structure, comprising at least two exterior wall panels, characterized by: The exterior wall panels include one or more side-by-side AAC panels fixedly connected together on the surface by cement-based polymer. The cement-based polymer in the exterior wall panels covers at least the side surfaces and one wall surface of the AAC panels to form a waterproof layer. The cement-based polymer forms baffles at the left and right ends of the AAC panels. Two adjacent exterior wall panels are arranged at an angle so that the baffles and side walls enclose a positive corner cast-in-place space. The positive corner is formed by pouring cement-based polymer in the positive corner cast-in-place space.

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

3. The exterior wall positive corner connection structure of a cement-based polymer and AAC combination according to claim 2, characterized in that: The baffle is parallel and flush with the outer wall surface of the composite exterior wall panel.

4. The cement-based polymer and AAC combined exterior wall positive corner connection structure according to claim 3, characterized in that: The width of the baffle is 50-250mm.

5. The exterior wall positive corner connection structure of a cement-based polymer and AAC combination according to claim 4, characterized in that: Two adjacent exterior wall panels are arranged at right angles.

6. The exterior wall positive corner connection structure of a cement-based polymer and AAC combination according to claim 5, characterized in that: The wall surface after the exterior wall panels are covered with cement-based polymer is the exterior wall surface.

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