Cement-based polymer and AAC combined outer wall sequential connection structure

Abstract

The utility model relates to the field of fabricated buildings, and discloses a cement-based polymer and AAC combined outer wall sequential connection structure, which comprises at least two outer wall plates, each outer wall plate comprises one or more side-by-side AAC plates, and the surfaces of the AAC plates are fixedly connected into a whole through cement-based polymers. The cement-based polymer in the external wall panel at least wraps the side face and the external wall face of the AAC panel to form a waterproof layer, the cement-based polymer outwards and flatly extends on the left side and the right side of the external wall face of the external wall panel to form outer baffles, and the AAC panel outwards and flatly extends on the left side and the right side of the internal wall face of the external wall panel to form inner baffles. Every two adjacent outer wallboards are arranged at a flat angle, so that the outer baffles, the inner baffles and the side walls of the outer wallboards are enclosed to form a sequentially-connected cast-in-place space, and cement-based polymers are poured in the sequentially-connected cast-in-place space to form connecting strips connected between the two adjacent outer wallboards. When the cement-based polymer and AAC combined outer wall is used as a fabricated building outer wall, the adjacent outer wall plates can be connected in sequence.

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 smooth 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, excellent 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 structural connection between adjacent wall units when used as exterior walls. Therefore, a continuous connection 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 cement-based polymer and AAC combined exterior wall smooth connection structure, so as to realize the smooth connection between adjacent exterior wall panels when the cement-based polymer and AAC combined exterior wall is used as the exterior wall of an assembled building.

[0007] To achieve the above-mentioned object, the present invention adopts the following technical solution: a cement-based polymer and AAC combined exterior wall smooth 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 a cement-based polymer, the cement-based polymer in the exterior wall panels covers at least the side surfaces and the exterior wall surfaces of the AAC panels to form a waterproof layer, the cement-based polymer extends outward on the left and right sides of the exterior wall surface of the exterior wall panel to form an outer baffle, and the AAC panels extend outward on the left and right sides of the interior wall surface of the exterior wall panel to form an inner baffle, and the adjacent two exterior wall panels are arranged at a right angle so that the outer baffle, the inner baffle and the side walls of the exterior wall panels enclose a smooth cast-in-place space, and the cement-based polymer is cast in the smooth cast-in-place space to form a connecting strip connecting the two adjacent exterior wall panels.

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

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

[0010] Preferably, as an improvement, the length of the outer baffle and the inner baffle extending to the side wall of the exterior wall panel is 20-130 mm.

[0011] Preferably, as an improvement, the thickness of the inner baffle is 20-40 mm.

[0012] Preferably, as an improvement, the outer baffle and the inner baffle extend to the side wall of the exterior wall panel by the same length.

[0013] The cement-based polymer and AAC combined exterior wall joint structure proposed in this utility model is intended to solve the problem of the lack of effective connection methods in the prior art, and to ensure that when such composite wall panels are used in prefabricated buildings, good sealing and structural stability can be achieved. When this solution is actually applied, the main body of the exterior wall panel is composed of an AAC board in the middle and a cement-based polymer layer cast on the outside. The cement-based polymer improves the waterproof and anti-seepage performance of the exterior wall panel through prefabrication, and improves the overall structural strength of the exterior wall panel, with better earthquake resistance and crack resistance. At the same time, the internal AAC board ensures that the overall quality of the exterior wall panel is lighter than traditional and other exterior wall panels under the same conditions, and has the characteristics of thermal insulation, heat insulation, fire prevention, sound insulation, environmental protection, convenient construction, and good economy.

[0014] By combining cement-based polymers with AAC boards, a new composite wallboard is formed. The cement-based polymer not only forms a waterproof protective layer on the surface of the AAC board, but also enhances the structural strength and durability of the entire wallboard.

[0015] To effectively connect adjacent exterior wall panels, a unique, seamless joint structure was designed. Each panel's two sides extend outward to form outer and inner baffles. These baffles, along with the side panels, create a seamless, cast-in-place space. During construction, cementitious polymer can be poured into this space, forming a connecting strip connecting the two adjacent panels and ensuring the continuity and stability of the entire wall.

[0016] To ensure the effectiveness of the seamless structure and ease of construction, the dimensions of the outer and inner baffles were optimized. For example, the outer baffles are parallel and flush with the exterior wall surface of the composite exterior wall panels. The length of the outer and inner baffles extending beyond the exterior wall panels ranges from 20 to 130 mm. The thickness of the inner baffles ranges from 20 to 40 mm, and the thickness of the waterproof layer and baffles ranges from 2 to 4 mm. These dimensions ensure both structural stability and ease of construction.

[0017] The advantages of the present invention include:

[0018] Improved anti-seepage performance: By coating the AAC board with a cement-based polymer, a dense waterproof layer is formed, effectively preventing moisture from penetrating the wall. Furthermore, the connecting strips in the continuous joint structure further strengthen the seal between adjacent wall panels, preventing water seepage caused by improper joint treatment.

[0019] Enhanced Structural Strength: Cementitious polymers not only enhance the structural strength of individual AAC panels but also form strong connecting strips between adjacent panels, enhancing the overall structural strength of the entire wall. This makes the wall more stable when subjected to external loads, especially during natural disasters such as earthquakes.

[0020] Improved thermal insulation: AAC materials inherently possess excellent thermal insulation properties, and the addition of cementitious polymers does not compromise these properties. On the contrary, due to the low thermal conductivity of cementitious polymers, they can further enhance the thermal insulation of the wall, reducing building energy consumption.

[0021] Prevent air leakage: The outer and inner baffles in the smooth structural design can effectively block the gaps between the wall panels, preventing cold air from entering the room from the outside, thereby reducing heat loss and improving the comfort of the building.

[0022] Convenient construction: This seamless structure has a simple design and is easy to construct, making it suitable for large-scale prefabricated building projects. Through standardized production processes, it can significantly improve construction efficiency and shorten the construction period.

[0023] Environmentally sustainable: AAC materials and cement-based polymers are both environmentally friendly materials, meeting the requirements of green building. In addition, the design of the smooth joint structure is conducive to resource recycling, reducing the generation of construction waste, and has good environmental benefits. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural schematic view of a single outer wall panel in the embodiment of the utility model.

[0025] Figure 2 It is a structural schematic view of the embodiment of the utility model. DETAILED DESCRIPTION

[0026] The following is further described in detail through specific embodiments:

[0027] The reference signs in the drawings of the specification include: AAC board 1, waterproof layer 2, outer baffle 3, inner baffle 4, side wall 5, smooth joint cast-in-place space 6.

[0028] The embodiment is basically as shown in the accompanying drawings: Figure 1 、 Figure 2 A cement-based polymer and AAC combined outer wall smooth joint structure, comprising two outer wall panels, the outer wall panel comprises three side-by-side AAC boards 1 which are integrally connected by a cement-based polymer on the surface, the cement-based polymer in the outer wall panel covers the side surface of the AAC board 1 and the outer wall surface to form a waterproof layer 2, the cement-based polymer outwardly extends on the left and right sides of the outer wall surface of the outer wall panel to form an outer baffle 3, the thickness of the waterproof layer 2 and the outer baffle 3 formed by the cement-based polymer is 2-4mm, and the outer baffle 3 is parallel and flush with the outer wall surface of the outer wall panel. The AAC board 1 outwardly extends on the left and right sides of the inner wall surface of the outer wall panel to form an inner baffle 4, and the thickness of the inner baffle 4 is 20-40mm. The outer baffle 3 and the inner baffle 4 extend to the side wall 5 of the outer wall panel by the same length, and the length of the outer baffle 3 and the inner baffle 4 extending to the side wall 5 of the outer wall panel is 20-130mm. The two adjacent outer wall panels are arranged at a straight angle to make the outer baffle 3, the inner baffle 4 and the side wall 5 of the outer wall panel form a smooth joint cast-in-place space 6, and the smooth joint cast-in-place space 6 is filled with a cement-based polymer to form a connecting strip connected between the two adjacent outer wall panels.

[0029] 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.

[0030] The specific implementation process is as follows: AAC panels 1 and cement-based polymers are prefabricated in a workshop to form exterior wall panels, which are then transported to the construction site as prefabricated wall panels for the building's exterior walls. During construction, the exterior panels' outer baffles 3 and sidewalls 5 are cleaned and pretreated. These surfaces may be roughened, scored, or coated with a surface agent. The panels are then hoisted to their intended locations and adjusted to form a right angle. Once positioned, the outer baffles 3 and inner baffles 4 at the side ends of the two panels abut at a right angle. The sidewalls 5, outer baffles 3, and inner baffles 4 enclose a square column-shaped, cast-in-place space 6. Then, a cement-based polymer is cast in the cast-in-place space 6. The cast-in-place cement-based polymer maintains consistency with the material of the baffle to ensure a firm connection between the two adjacent exterior wall panels. The formed cement-based polymer and AAC combined exterior wall connection structure has better overall structural stability, high structural strength, good earthquake resistance and crack resistance, better durability, better sealing, good waterproof and windproof performance, and no risk of leakage.

[0031] 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 structure, characterized by: The invention comprises at least two exterior wall panels, characterized in that: the exterior wall panels comprise one or more side-by-side AAC panels fixedly connected as one on the surface by cement-based polymers; the cement-based polymers in the exterior wall panels cover at least the side surfaces and the exterior wall surfaces of the AAC panels to form a waterproof layer; the cement-based polymers extend outward on the left and right sides of the exterior wall surfaces of the exterior wall panels to form outer baffles; the AAC panels extend outward on the left and right sides of the interior wall surfaces of the exterior wall panels to form inner baffles; the adjacent exterior wall panels are arranged at a right angle so that the outer baffles, the inner baffles and the side walls of the exterior wall panels enclose a continuous cast-in-place space; and the continuous cast-in-place space is cast with cement-based polymers to form a connecting strip connecting the two adjacent exterior wall panels.

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

3. The cement-based polymer and AAC combined exterior wall smooth connection structure according to claim 2, characterized in that: The outer 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 smooth connection structure according to claim 3, characterized in that: The length of the outer baffle and the inner baffle extending to the side wall of the outer wall panel is 20-130mm.

5. The cement-based polymer and AAC combined exterior wall smooth connection structure according to claim 4, characterized in that: The thickness of the inner baffle is 20-40mm.

6. The cement-based polymer and AAC combined exterior wall smooth connection structure according to claim 5, characterized in that: The lengths of the outer baffle and the inner baffle extending to the side wall of the outer wall panel are the same.

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