Fabricated building outer wall waterproof structure
By using multi-layer waterproof structures and mesh-reinforced waterproof structures in prefabricated buildings, the problem of leakage in joints is solved, the waterproof performance and energy-saving effects are improved, and construction costs are reduced.
Patent Information
- Application Number
- CN202422307891.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-09-23
AI Technical Summary
Leakage in joints is a common problem in prefabricated buildings and there is a lack of systematic solutions. Existing technical standards are not unified, which leads to increased construction costs.
The concrete structural floor is combined with ALC autoclaved lightweight concrete slabs, and materials such as interface agent, waterproof mortar, waterproof paste, bonding mortar, insulation board and finishing layer are used, combined with anti-cracking reinforced glass fiber mesh cloth and locally reinforced glass fiber mesh cloth to form a multi-layer waterproof structure, which is connected by plastic anchor bolts and metal expansion bolts.
It improves the waterproof performance of the exterior wall, enhances the crack resistance and energy saving effect, reduces the use of mechanical anchoring, is suitable for a variety of buildings, and reduces construction costs.
Smart Images
Figure CN223329999U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building exterior wall waterproofing, in particular to an assembled building exterior wall waterproofing structure. Background Art
[0002] Prefabricated buildings face numerous exterior wall waterproofing challenges, with joint leakage being one of the most common. Prefabricated buildings are constructed from prefabricated components, and the joints between components easily become channels for leakage. Exterior wall leakage is a common problem due to poor construction precision, material deformation, and aging and cracking of sealing materials.
[0003] Currently, the technical standards for waterproofing in prefabricated buildings still follow those of traditional cast-in-place concrete construction, and proprietary technical standards are incomplete. Technical standards vary across regions and companies, leading to a lack of unified specifications and guidance during the construction process. Furthermore, while prefabricated building waterproofing designs include some technical measures and materials specifically for exterior wall waterproofing, they lack a systematic solution. Current technologies often focus on specific issues, such as the sealing of joints and the waterproof performance of materials, without considering the overall exterior wall waterproofing problem. Addressing exterior wall waterproofing requires the adoption of new materials and technologies, which often increases construction costs. For some projects, cost pressures may hinder the application and promotion of exterior wall waterproofing technology. Utility Model Content
[0004] The present invention aims to solve the above problems and provides a prefabricated building exterior wall waterproof structure, which adopts the following technical solutions:
[0005] A prefabricated building exterior wall waterproof structure, wherein a concrete structure floor slab is anchored between ALC autoclaved lightweight concrete slabs, and the concrete structure floor slab is fixed to the I-beam of the steel structure building body, an interface agent, waterproof mortar, waterproof paste, bonding mortar, thermal insulation board, plastering mortar and finishing layer are sequentially arranged on the outside of the ALC autoclaved lightweight concrete slab, an alkali-resistant glass fiber mesh cloth is compounded in the waterproof mortar, and a glass fiber mesh cloth is compounded in the plastering mortar, an L-angle steel is arranged at the inner corner where one side of the ALC autoclaved lightweight concrete slab inner wall panel meets the concrete structure floor slab, and the two side surfaces of the L-angle steel are respectively connected to the ALC autoclaved lightweight concrete slab and the concrete structure floor slab by hook bolts and metal expansion bolts, the outside of the concrete structure floor slab is fixedly connected to an extruded board by plastic anchor bolts, the extruded board is flush with the outer surface of the ALC autoclaved lightweight concrete slab, the thermal insulation board on the outside of the concrete structure floor slab is replaced with a rock wool strip, and the upper and lower ends of the rock wool strip cover the contact positions of the upper and lower sides of the concrete structure floor slab with the ALC autoclaved lightweight concrete slab.
[0006] On the basis of the above scheme, a crack-resistant reinforced glass fiber mesh is set on the outer surface of the extruded board outside the concrete structure floor. The crack-resistant reinforced glass fiber mesh is compounded in the waterproof mortar and arranged between the interface agent and the alkali-resistant glass fiber mesh. The upper and lower ends of the crack-resistant reinforced glass fiber mesh extend to the ALC autoclaved lightweight concrete slabs on the upper and lower sides of the concrete structure floor.
[0007] Based on the above scheme, the length of the upper and lower sides of the anti-cracking reinforced glass fiber mesh cloth overlapped on the ALC autoclaved lightweight concrete board is not less than 100mm, the thickness of the waterproof mortar is not less than 8mm, and the thickness of the waterproof slurry is not less than 1.5mm.
[0008] Preferably, a locally reinforced fiberglass mesh cloth is provided on the outside of the concrete structure floor slab, the locally reinforced fiberglass mesh cloth is compounded in the plastering mortar and arranged between the rock wool strip and the fiberglass mesh cloth, and the upper and lower ends of the locally reinforced fiberglass mesh cloth extend to the insulation boards on the upper and lower sides of the rock wool strip.
[0009] On the basis of the above solution, the length of the locally reinforced glass fiber mesh cloth is not less than 500 mm, and the locally reinforced glass fiber mesh cloth and the rock wool strip are symmetrically centered in the height direction.
[0010] Preferably, a gap is formed between the upper side of the concrete structure floor slab and the ALC autoclaved lightweight concrete slab by arranging a grouting material pad, and the gap is filled with polymer mortar.
[0011] Preferably, the outer surface of the ALC autoclaved lightweight concrete slab protrudes outward by 50 mm to 80 mm compared to the concrete structural floor slab.
[0012] Preferably, the bonding mortar is constructed using a strip bonding method, and the effective bonding area rate is not less than 80%.
[0013] Preferably, the insulation board is a graphite polystyrene board.
[0014] Preferably, the height of the rock wool strips is 300 mm.
[0015] The beneficial effects of the utility model are:
[0016] (1) Apply interface agent on the surface of ALC autoclaved lightweight concrete board to improve the bonding strength of waterproof mortar layer and avoid hollowing. At the same time, add anti-cracking reinforced alkali-resistant glass fiber mesh cloth inside the mortar layer at the connection position to effectively enhance the crack resistance of the waterproof mortar layer;
[0017] (2) The ALC autoclaved lightweight concrete slab facade protrudes from the end face of the concrete structure floor slab. Extruded panels are used to compensate for the linear thermal bridge loss at the concrete structure floor slab, and polymer mortar is filled to seal and fix it, thereby improving the energy-saving effect of the building;
[0018] (3) Anti-cracking reinforced glass fiber mesh is installed at the connection position to seal the insulation structure outside the floor slab, provide an attachment base for the overall waterproof mortar, and increase local crack resistance;
[0019] (4) Waterproof mortar and waterproof paste constitute the two waterproof layers of the ALC autoclaved lightweight concrete exterior wall of the prefabricated building, which is suitable for a wide range of and various types of building exterior wall waterproof structures;
[0020] (5) Rock wool strips are installed on the floor as an insulation layer to further improve the fire resistance of the system;
[0021] (6) Different from the traditional exterior wall insulation structure, the exterior wall insulation system involved in this technical solution is an anchor-free structure, which effectively prevents mechanical anchors from penetrating the waterproof layer, thereby improving the waterproofness of the system. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 : Schematic diagram of the structure of the utility model;
[0023] Figure 2 : The utility model Figure 1 A partial enlarged view of part A in the middle. DETAILED DESCRIPTION
[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0025] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.
[0026] In the description of the present invention, it should be understood that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.
[0027] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.
[0028] like Figure 1 and Figure 2 The figure shows a prefabricated building exterior wall waterproofing structure. Concrete floor slabs 11 are anchored between ALC autoclaved lightweight concrete slabs 51, which are fixed to I-beams 12 of the steel structure. The exterior of the ALC autoclaved lightweight concrete slabs 51 is sequentially coated with an interface agent 52, waterproof mortar 53, waterproof paste 54, bonding mortar 55, insulation board 561, finishing mortar 57, and a finishing layer 58. The waterproof mortar 53 is compounded with an alkali-resistant fiberglass mesh 531, and the finishing mortar 57 is compounded with a fiberglass mesh 571. The interface agent 52 prevents bulging. The bonding mortar 55 is applied using a strip bonding method with an effective bonding area ratio of at least 80%. By increasing the effective bonding area instead of mechanical anchoring, the waterproofing performance of the structure is significantly improved. Preferably, the insulation board 561 is a graphite polystyrene board. The waterproof mortar 53 is at least 8 mm thick, and the waterproof paste 54 is at least 1.5 mm thick.
[0029] An L-angle steel 22 is provided at the inner corner where one side of the inner wall panel of the ALC autoclaved lightweight concrete slab 51 meets the concrete structural floor slab 11. The two side surfaces of the L-angle steel 22 are mechanically fixed to the ALC autoclaved lightweight concrete slab 51 and the concrete structural floor slab 11 by hook head bolts 21 and metal expansion bolts 23 respectively.
[0030] The outer side of the concrete structural floor 11 is fixedly connected to an extruded board 41 via plastic anchor bolts 42. The extruded board 41 is flush with the outer surface of the ALC autoclaved lightweight concrete board 51. A gap is formed between the upper side of the concrete structural floor 11 and the ALC autoclaved lightweight concrete board 51 by providing a grouting material pad 31, and the gap is filled with polymer mortar 32. The extruded board 41 is used to compensate for the linear thermal bridge loss at the concrete structural floor 11, and is filled with polymer mortar 32 for sealing and fixing, thereby improving the energy-saving effect of the building. Preferably, the outer surface of the ALC autoclaved lightweight concrete board 51 protrudes outward from the concrete structural floor 11 by 50mm-80mm.
[0031] The insulation board 561 on the exterior of the concrete floor 11 is replaced with rock wool strips 562. The upper and lower ends of the rock wool strips 562 cover the contact areas between the upper and lower sides of the concrete floor 11 and the ALC autoclaved lightweight concrete slab 51, thereby improving the fire resistance of the system. Preferably, the rock wool strips 562 are 300 mm high.
[0032] A crack-resistant reinforced glass fiber mesh 532 is applied to the outer surface of the extruded board 41 outside the concrete structural floor 11. This anti-crack reinforced glass fiber mesh 532 is composited within the waterproof mortar 53 and positioned between the interface agent 52 and the alkali-resistant glass fiber mesh 531. The upper and lower ends of this anti-crack reinforced glass fiber mesh 532 extend over the ALC autoclaved lightweight concrete slabs 51 on the upper and lower sides of the concrete structural floor 11 to enhance the exterior wall structure's crack resistance. Preferably, the upper and lower overlap lengths of this anti-crack reinforced glass fiber mesh 532 over the ALC autoclaved lightweight concrete slabs 51 are both no less than 100 mm.
[0033] A locally reinforced fiberglass mesh 572 is installed on the exterior of the concrete floor slab 11. This locally reinforced fiberglass mesh 572 is composited within the finishing mortar 57 and positioned between the rock wool strips 562 and the fiberglass mesh 571. The upper and lower ends of this locally reinforced fiberglass mesh 572 extend onto the insulation board 561 above and below the rock wool strips 562 to enhance structural strength at the connection points. Preferably, the locally reinforced fiberglass mesh 572 is no less than 500 mm long and is symmetrically centered with the rock wool strips 562 in the height direction.
[0034] The present invention is described above by way of examples, but the present invention is not limited to the above specific embodiments. Any changes or modifications based on the present invention fall within the scope of protection claimed by the present invention.
Claims
1. A prefabricated building exterior wall waterproof structure, characterized in that: The concrete structure floor slab (11) is anchored between the ALC autoclaved lightweight concrete slabs (51), and the concrete structure floor slab (11) is fixed on the I-steel (12) of the steel structure building body. The outer side of the ALC autoclaved lightweight concrete slab (51) is sequentially provided with an interface agent (52), a waterproof mortar (53), a waterproof slurry (54), a bonding mortar (55), an insulation board (561), a finishing mortar (57) and a finishing layer (58). The waterproof mortar (53) is compounded with an alkali-resistant glass fiber mesh cloth (531), and the finishing mortar (57) is compounded with a glass fiber mesh cloth (571). One side of the inner wall panel of the ALC autoclaved lightweight concrete slab (51) is connected to the concrete structure floor slab (11). An L-shaped angle steel (22) is provided at the inner corner of the concrete structure floor (11). The two side surfaces of the L-shaped angle steel (22) are connected to the ALC autoclaved lightweight concrete slab (51) and the concrete structure floor (11) respectively through hook bolts (21) and metal expansion bolts (23). The outer side of the concrete structure floor (11) is fixedly connected to the extruded board (41) through plastic anchor bolts (42). The extruded board (41) is flush with the outer surface of the ALC autoclaved lightweight concrete slab (51). The insulation board (561) outside the concrete structure floor (11) is replaced with a rock wool strip (562), and the upper and lower ends of the rock wool strip (562) cover the contact positions of the upper and lower sides of the concrete structure floor (11) and the ALC autoclaved lightweight concrete slab (51).
2. The assembled building exterior wall waterproof structure according to claim 1, characterized in that: An anti-cracking reinforced glass fiber mesh cloth (532) is provided on the outer surface of the extruded board (41) outside the concrete structure floor slab (11). The anti-cracking reinforced glass fiber mesh cloth (532) is compounded in the waterproof mortar (53) and provided between the interface agent (52) and the alkali-resistant glass fiber mesh cloth (531). The upper and lower ends of the anti-cracking reinforced glass fiber mesh cloth (532) extend to the ALC autoclaved lightweight concrete slabs (51) on the upper and lower sides of the concrete structure floor slab (11).
3. The assembled building exterior wall waterproof structure according to claim 2, characterized in that: The length of the upper and lower sides of the anti-cracking reinforced glass fiber mesh cloth (532) overlapped on the ALC autoclaved lightweight concrete slab (51) is not less than 100 mm, the thickness of the waterproof mortar (53) is not less than 8 mm, and the thickness of the waterproof slurry (54) is not less than 1.5 mm.
4. The assembled building exterior wall waterproof structure according to claim 1, characterized in that: A locally reinforced glass fiber mesh cloth (572) is provided on the outside of the concrete structure floor slab (11), the locally reinforced glass fiber mesh cloth (572) is compounded in the plastering mortar (57) and provided between the rock wool strip (562) and the glass fiber mesh cloth (571), and the upper and lower ends of the locally reinforced glass fiber mesh cloth (572) extend to the insulation board (561) on the upper and lower sides of the rock wool strip (562).
5. The assembled building exterior wall waterproof structure according to claim 4, characterized in that: The length of the locally reinforced glass fiber mesh cloth (572) is not less than 500 mm, and the locally reinforced glass fiber mesh cloth (572) and the rock wool strip (562) are symmetrically arranged in the center in the height direction.
6. The assembled building exterior wall waterproof structure according to claim 1, characterized in that: A gap is formed between the upper side of the concrete structure floor slab (11) and the ALC autoclaved lightweight concrete slab (51) by arranging a grouting material pad (31), and the gap is filled with polymer mortar (32).
7. The assembled building exterior wall waterproof structure according to claim 1, characterized in that: The outer surface of the ALC autoclaved lightweight concrete slab (51) protrudes outwards by 50 mm to 80 mm relative to the concrete structural floor slab (11).
8. The assembled building exterior wall waterproof structure according to claim 1, characterized in that: The bonding mortar (55) is constructed using a strip bonding method, and the effective bonding area rate is not less than 80%.
9. The assembled building exterior wall waterproof structure according to claim 1, characterized in that: The thermal insulation board (561) is a graphite polystyrene board.
10. The assembled building exterior wall waterproof structure according to claim 1, characterized in that: The height of the rock wool strip (562) is 300 mm.