Built-in heat preservation cast-in-place concrete system and construction method
The built-in thermal insulation cast-in-place concrete system addresses issues of cracking and water seepage in traditional insulation panels by integrating insulation boards with concrete using steel wire mesh and precise construction methods, ensuring long-lasting and fire-resistant insulation.
Patent Information
- Application Number
- CN202411384185.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2024-12-27
AI Technical Summary
Traditional exterior wall insulation panels in building construction are prone to cracking, hollowing, falling off, and water seepage, posing safety risks and requiring frequent replacement.
A built-in thermal insulation cast-in-place concrete system integrating welded steel wire mesh and insulation boards with concrete, using special connectors to ensure integration and stability, and a construction method that includes precise pouring and curing steps to ensure durability.
The system provides a durable, fire-resistant insulation solution that integrates insulation boards into the concrete structure, preventing damage and extending the insulation's lifespan to match the building's, reducing maintenance costs and improving construction efficiency.
Smart Images
Figure CN119195369A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to an external wall thermal insulation project of a building construction project, in particular to a built-in thermal insulation cast-in-place concrete system and a construction method. Background Art
[0002] In the construction of exterior wall insulation projects in today's housing projects, most projects still use the method of pasting insulation boards on the exterior walls of buildings. Pasting insulation boards on the exterior walls can easily lead to problems such as cracking, hollowing, falling off, and water seepage in the insulation boards, and even fire accidents caused by the exterior wall insulation boards. Summary of the invention
[0003] The present invention aims to overcome the defects of the prior art and provide a cast-in-place concrete system with built-in thermal insulation and a construction method to solve the problems of traditional exterior wall insulation panels being prone to cracking, hollowing, falling off, and water seepage.
[0004] In order to solve the above-mentioned technical problems, the present invention is achieved as follows: A built-in thermal insulation cast-in-place concrete system, characterized in that it comprises a thermal insulation system for shear walls and a thermal insulation system for filling walls; The insulation system for shear walls is to connect the welded steel wire mesh to one side of the insulation board through a special connector, and the other side of the insulation board is connected to the shear wall reinforcement. Concrete is poured on both sides at the same time, thus forming a built-in insulation cast-in-place concrete system; The insulation system for the infill wall is to connect the welded steel wire mesh frame to both sides of the insulation board through special connectors, and pour concrete on both sides at the same time, thus forming a built-in insulation cast-in-place concrete system.
[0005] The described built-in insulation cast-in-place concrete system is characterized in that: the insulation system for shear wall includes: formwork support parts, anti-cracking mesh, fixed mesh, insulation board, and shear wall structure layer arranged in sequence; the fixed mesh and the insulation board are connected by a grid plate connector, and the anti-cracking mesh, fixed mesh, insulation board, and shear wall structure layer are connected by a structural connector; concrete is poured at the formwork support parts, anti-cracking mesh, fixed mesh, and shear wall structure layer.
[0006] The built-in thermal insulation cast-in-place concrete system is characterized in that the grid plate connecting piece is a U-shaped connecting piece.
[0007] The described built-in insulation cast-in-place concrete system is characterized in that: the insulation system for the filling wall includes: an anti-cracking mesh, a fixed mesh, an insulation board, a fixed mesh, and an anti-cracking mesh arranged in sequence; the above are connected by a grid plate connecting piece, and formwork support pieces are respectively arranged on both sides of the insulation board, and concrete is poured on both sides of the insulation board.
[0008] The built-in thermal insulation cast-in-place concrete system is characterized in that the thermal insulation board material includes molded polystyrene board, polyurethane board and extruded polystyrene board.
[0009] The construction method of the built-in thermal insulation cast-in-place concrete system is characterized in that it comprises the following steps: Step 1: Materials are brought in; the construction joints at the base of the exterior wall are roughened and cleaned, and then accepted; Step 2: Complete the binding of wall column reinforcement; Step 3: Install the built-in insulation board; Step 4: Fix the built-in insulation board; Step 5: Bundle additional reinforcement; Step 6: Pre-buried water and electricity boxes and wire pipes; Step 7: Formwork support; Step 8: Fix the template; Step 9: Concrete pouring; Special requirements for concrete pouring are: ① The thickness of the protective layer of the built-in insulation wall is, and ordinary commercial concrete can be used for casting, but the particle size of the concrete should not exceed. During the construction of common commercial concrete, it is necessary to pay attention to controlling the particle size of coarse aggregate; ② The pouring points of the built-in insulation wall concrete should be at the L-shaped wall, cross-shaped, and T-shaped intersections of the shear wall to ensure the uniform flow of the concrete, and perform multi-point vibration to make it more compact; ③ When pouring concrete, pour the structural layer concrete first, and then pour the protective layer concrete, and pour in layers according to the requirements. The height of each layer does not exceed, and The interval time between each layer of concrete pouring shall not exceed the initial setting time; ④ The difference in the height of the concrete poured between the structural layer and the protective layer shall not exceed, and the height of the concrete surface of the protective layer shall not exceed that of the concrete surface of the structural layer; ⑤ When pouring concrete for cast-in-place concrete built-in insulation walls, the outer protective layer is small, and a small vibrating rod is used for vibration, and a leather hammer is used to knock on the outside of the formwork. When the local concrete is blocked, threaded steel bars can be used for tamping; ⑥ In order to avoid the situation where the window sills and other parts are not poured and vibrated compactly, air holes with a diameter of not less than are required at these locations to observe the flow of concrete; Step 10: Concrete vibration; Step 11: Formwork removal; the removal of the formwork with built-in insulation system needs to be postponed by 24 hours compared to the usual shear wall formwork. After the concrete reaches the predetermined strength, the formwork must be removed immediately; Step 12: Concrete curing: Spray water on the concrete surface or cover it with plastic film to keep it moist. The curing period should be no less than 14 days to prevent dry cracks from appearing on the surface.
[0010] The construction method of a built-in thermal insulation cast-in-place concrete system is characterized in that step three is specifically as follows: the installation of the thermal insulation board should be carried out in a manner of closing each room and connecting in sequence, and the width of the joints between the thermal insulation boards should not exceed; the installation method of the welded steel grid thermal insulation board is different according to the weight, the lighter one can be installed manually, while the heavier one needs to be vertically hoisted; after determining the position of the welded steel grid thermal insulation board, fine-tuning is required. At this time, square wood should be placed on the thermal insulation board and knocked with a hammer, and it is not allowed to directly pry the thermal insulation board or hit the steel grid with force; After the insulation board is installed, check the verticality of the built-in insulation board. After the built-in insulation board is installed, it is necessary to measure and adjust its verticality, and then build a temporary guardrail with steel pipes to ensure the stability of the insulation board.
[0011] The construction method of the built-in insulation cast-in-place concrete system is characterized in that step five specifically comprises: after the insulation board is installed in place and temporarily fixed, it is tied and fixed with the shear wall steel bars; in the building insulation system, flat mesh, angle mesh or U-shaped mesh is required to connect the cast-in-place concrete built-in insulation wall at vertical joints, exterior wall corners and windows; the connection requires overlap of not less than, and reliable measures must be taken to ensure the accurate installation position of the cast-in-place concrete built-in insulation wall and auxiliary fixings; a structural steel bar with a diameter of φ10 is added to the insulation protection layer around the door and window openings, so that the two sides of the opening can be interconnected from top to bottom.
[0012] The construction method of the built-in insulation cast-in-place concrete system is characterized in that step six is specifically as follows: before reserving and pre-embedding the wire pipes, boxes and embedded parts in the wall body, it is necessary to weld the steel mesh insulation board and connect the steel bars; during the construction process, when it is necessary to run the pipe vertically along the wall or cut the steel mesh, after the pipe laying is completed, the same specification of steel mesh or steel bars with a diameter of should be used at the cut point for overlap and fixation, and the overlap length should not be less than and tied firmly.
[0013] The construction method of the built-in insulation cast-in-place concrete system is characterized in that step eight specifically includes: vertical additional steel bars are left at the construction site of the cast-in-place concrete built-in insulation wall. The vertical additional steel bars can be φ8 steel bars, with a spacing of no more than , and the vertical steel bars extend into the upper and lower layers to no less than , and the vertical additional steel bars are used to connect and fix the upper and lower insulation boards.
[0014] The beneficial effects of the present invention are as follows: It can be seen from the above technical scheme that the present application provides a built-in thermal insulation cast-in-place concrete system and construction method, in which the thermal insulation board and the cast-in-place concrete structure are integrated into one construction, and the thermal insulation board is built into the concrete wall, which can have the same lifespan as the building, truly realizing the goal of "the building is not demolished and the insulation is not damaged".
[0015] The built-in insulation board of the present invention has a self-supporting system, which simplifies the construction process, promotes the industrialization of construction projects and the industrialization of housing, and improves the construction speed. The insulation material is built into the concrete wall to isolate the insulation board from external fire sources, improve the fire resistance limit of the insulation board, and the insulation layer has the same lifespan as the building, achieving the quality goal of "no building demolition and no insulation damage". It can have the same lifespan as the building and does not need to be repaired or replaced, saving the cost of later exterior wall insulation repair and replacement. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a schematic diagram of the process of the present invention.
[0017] Figure 2 Schematic diagram of the insulation system for shear walls.
[0018] Figure 3 Schematic diagram of the insulation system for infill walls. DETAILED DESCRIPTION
[0019] The technical solutions of the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments in the embodiments of the present application are within the scope of protection requested by the present application. like Figure 2 , 3 As shown: a built-in thermal insulation cast-in-place concrete system, which includes a thermal insulation system for shear walls and a thermal insulation system for filling walls; The insulation system for shear walls is to connect the welded steel wire mesh to one side of the insulation board through a special connector, and the other side of the insulation board is connected to the shear wall reinforcement. Concrete is poured on both sides at the same time, thus forming a built-in insulation cast-in-place concrete system; The insulation system for the infill wall is to connect the welded steel wire mesh frame to both sides of the insulation board through special connectors, and pour concrete on both sides at the same time, thus forming a built-in insulation cast-in-place concrete system.
[0020] Furthermore, the insulation system for the shear wall includes: a formwork support 5, an anti-cracking mesh 1, a fixed mesh 2, an insulation board b, and a shear wall structure layer c arranged in sequence; the fixed mesh and the insulation board are connected by a grid board connector 3, and the anti-cracking mesh, the fixed mesh, the insulation board, and the shear wall structure layer are connected by a structural connector 4; concrete is poured on the built-in insulation board protective layer a formed by the formwork support, the anti-cracking mesh, and the fixed mesh, and the shear wall structure layer c.
[0021] The grid plate connecting piece is a U-shaped connecting piece.
[0022] The insulation system for the filling wall includes: an anti-cracking mesh 1, a fixed mesh 2, an insulation board b, a fixed mesh 2, and an anti-cracking mesh 1 arranged in sequence; the above are connected by a grid board connector 3, formwork support members 4 are respectively arranged on both sides of the insulation board, and the built-in insulation board protective layer a on both sides of the insulation board is poured with concrete.
[0023] The thermal insulation board materials include molded polystyrene boards, polyurethane boards and extruded polystyrene boards.
[0024] like Figure 1 As shown: A construction method of a built-in thermal insulation cast-in-place concrete system, which includes the following steps: Step 1: Materials are brought in; the construction joints at the base of the exterior wall are roughened and cleaned, and then accepted; Step 2: Complete the binding of wall column reinforcement; Step 3: Install the built-in insulation board; the installation of the insulation board should be carried out in a closed and sequentially connected manner, and ensure that the width of the joints between the insulation boards does not exceed. The installation method of the welded steel mesh insulation board varies according to its weight. The lighter ones can be installed manually, while the heavier ones need to be hoisted vertically. After determining the position of the welded steel mesh insulation board, fine-tuning is required. At this time, square wood should be placed on the insulation board and knocked with a hammer. It is not allowed to directly pry the insulation board or hit the steel mesh with force. Check the verticality of the built-in insulation board. After the built-in insulation board is installed, it is necessary to measure and adjust its verticality, and then build a temporary guardrail with steel pipes to ensure the stability of the insulation board.
[0025] Step 4: Fix the built-in insulation board; Step 5: Bundle additional steel bars; After the insulation board is installed in place and temporarily fixed, it should be immediately tied and fixed to the shear wall steel bars. In the building insulation system, flat mesh, angle mesh or U-shaped mesh is required to connect the cast-in-place concrete built-in insulation wall at vertical joints, exterior wall corners and windows. The connection needs to be overlapped by no less than, and reliable measures must be taken to ensure the accurate installation position of the cast-in-place concrete built-in insulation wall and auxiliary fixings. A structural steel bar with a diameter of φ10 is added to the insulation protection layer around the door and window openings, so that the upper and lower sides of the openings can penetrate each other.
[0026] Step 6: Reserve and embed water and wire boxes and wire pipes; before reserving and embedding wire pipes, boxes and embedded parts in the wall, it is necessary to weld the steel mesh insulation board and connect the steel bars. During the construction process, when it is necessary to run pipes vertically along the wall or cut the steel mesh, after the pipe is laid, the same specification of steel mesh or steel bars with a diameter should be overlapped and fixed at the cut point. The overlap length should not be less than and tied firmly.
[0027] Step 7: Formwork support; report to the supervisor for hidden acceptance of the project. Only after the acceptance is qualified can the wall column mold be closed. Follow the normal process to close the wall column mold and tie the top plate reinforcement.
[0028] Step 8: Fix the formwork; the construction site of the cast-in-place concrete built-in insulation wall needs to be equipped with additional vertical reinforcement according to the node details. The additional vertical reinforcement can be φ8 steel bars with a spacing of no more than , and the vertical reinforcement extends to the upper and lower layers not less than . The additional vertical reinforcement is used to connect and fix the upper and lower insulation boards.
[0029] Step 9: Concrete pouring; Special requirements for concrete pouring are: ① The thickness of the protective layer of the built-in insulation wall is, and ordinary commercial concrete can be used for casting, but the particle size of the concrete should not exceed. During the construction of common commercial concrete, it is necessary to pay attention to controlling the particle size of coarse aggregate; ② The pouring points of the built-in insulation wall concrete should be at the L-shaped wall, cross-shaped, and T-shaped intersections of the shear wall to ensure the uniform flow of the concrete, and perform multi-point vibration to make it more compact; ③ When pouring concrete, pour the structural layer concrete first, and then pour the protective layer concrete, and pour in layers according to the requirements. The height of each layer does not exceed, and The interval time between each layer of concrete pouring shall not exceed the initial setting time; ④ The difference in the height of the concrete poured between the structural layer and the protective layer shall not exceed, and the height of the concrete surface of the protective layer shall not exceed that of the concrete surface of the structural layer; ⑤ When pouring concrete for cast-in-place concrete built-in insulation walls, the outer protective layer is small, and a small vibrating rod is used for vibration, and a leather hammer is used to knock on the outside of the formwork. When the local concrete is blocked, threaded steel bars can be used for tamping; ⑥ In order to avoid the situation where the window sills and other parts are not poured and vibrated compactly, air holes with a diameter of not less than are required at these locations to observe the flow of concrete; Step 10: Concrete vibration; Step 11: Formwork removal; the removal of the formwork with built-in insulation system needs to be postponed by 24 hours compared to the usual shear wall formwork. After the concrete reaches the predetermined strength, the formwork must be removed immediately; Step 12: Concrete curing: Spray water on the concrete surface or cover it with plastic film to keep it moist. The curing period should be no less than 14 days to prevent dry cracks from appearing on the surface.
[0030] The above are only embodiments provided for the present application and are not intended to limit the present application. Although the present application is described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A cast-in-place concrete system with built-in thermal insulation, characterized in that: It includes a thermal insulation system for shear walls and a thermal insulation system for infill walls; The insulation system for shear walls is to connect the welded steel wire mesh to one side of the insulation board through a special connector, and the other side of the insulation board is connected to the shear wall reinforcement. Concrete is poured on both sides at the same time, thus forming a built-in insulation cast-in-place concrete system; The insulation system for the infill wall is to connect the welded steel wire mesh frame to both sides of the insulation board through special connectors, and pour concrete on both sides at the same time, thus forming a built-in insulation cast-in-place concrete system.
2. A cast-in-place concrete system with built-in thermal insulation according to claim 1, characterized in that: The thermal insulation system for shear wall comprises: formwork support, anti-cracking mesh, fixed mesh, insulation board, and shear wall structure layer arranged in sequence; the fixed mesh and insulation board are connected by a grid plate connector, the anti-cracking mesh, fixed mesh, insulation board, and shear wall structure layer are connected by a structural connector, and concrete is poured at the formwork support, anti-cracking mesh, fixed mesh, and shear wall structure layer.
3. A cast-in-place concrete system with built-in thermal insulation according to claim 2, characterized in that: The grid plate connecting piece is a U-shaped connecting piece.
4. The built-in thermal insulation cast-in-place concrete system according to claim 1, characterized in that: The insulation system for the filling wall includes: an anti-cracking mesh, a fixed mesh, an insulation board, a fixed mesh, and an anti-cracking mesh arranged in sequence; the above are connected by a grid board connector, formwork support members are respectively arranged on both sides of the insulation board, and concrete is poured on both sides of the insulation board.
5. The built-in thermal insulation cast-in-place concrete system according to claim 1, characterized in that: The thermal insulation board materials include molded polystyrene boards, polyurethane boards and extruded polystyrene boards.
6. The construction method of a cast-in-place concrete system with built-in thermal insulation according to claim 1, characterized in that It includes the following steps: Step 1: Materials are brought in; the construction joints at the base of the exterior wall are roughened and cleaned, and then accepted; Step 2: Complete the wall column reinforcement binding; Step 3: Install the built-in insulation board; Step 4: Fix the built-in insulation board; Step 5: Bundle additional reinforcement; Step 6: Pre-buried water and electricity boxes and wire pipes; Step 7: Formwork support; Step 8: Fix the template; Step 9: Concrete pouring; Special requirements for concrete pouring are: ① The thickness of the protective layer of the built-in insulation wall is, and ordinary commercial concrete can be used for casting, but the particle size of the concrete should not exceed. During the construction of common commercial concrete, it is necessary to pay attention to controlling the particle size of coarse aggregate; ② The pouring points of the built-in insulation wall concrete should be at the L-shaped wall, cross-shaped, and T-shaped intersections of the shear wall to ensure the uniform flow of the concrete, and perform multi-point vibration to make it more compact; ③ When pouring concrete, pour the structural layer concrete first, and then pour the protective layer concrete, and pour in layers according to the requirements. The height of each layer does not exceed, and The interval time between each layer of concrete pouring shall not exceed the initial setting time; ④ The difference in the height of the concrete poured between the structural layer and the protective layer shall not exceed, and the height of the concrete surface of the protective layer shall not exceed that of the concrete surface of the structural layer; ⑤ When pouring concrete for cast-in-place concrete built-in insulation walls, the outer protective layer is small, and a small vibrating rod is used for vibration, and a leather hammer is used to knock on the outside of the formwork. When the local concrete is blocked, threaded steel bars can be used for tamping; ⑥ In order to avoid the situation where the window sills and other parts are not poured and vibrated compactly, air holes with a diameter of not less than are required at these locations to observe the flow of concrete; Step 10: Concrete vibration; Step 11: Formwork removal; the removal of the formwork with built-in insulation system needs to be postponed by 24 hours compared to the usual shear wall formwork. After the concrete reaches the predetermined strength, the formwork must be removed immediately; Step 12: Concrete curing: Spray water on the concrete surface or cover it with plastic film to keep it moist. The curing period should be no less than 14 days to prevent dry cracks from appearing on the surface.
7. The construction method of a cast-in-place concrete system with built-in thermal insulation according to claim 6, characterized in that Step three is as follows: the installation of the insulation board should be carried out in a closed and sequentially connected manner, and the width of the joints between the insulation boards should not exceed; the installation method of the welded steel mesh insulation board varies according to its weight. The lighter ones can be installed manually, while the heavier ones need to be hoisted vertically; after determining the position of the welded steel mesh insulation board, fine-tuning is required. At this time, square wood should be placed on the insulation board and knocked with a hammer, and it is not allowed to pry the insulation board directly or hit the steel mesh with force; After the insulation board is installed, check the verticality of the built-in insulation board. After the built-in insulation board is installed, it is necessary to measure and adjust its verticality, and then build a temporary guardrail with steel pipes to ensure the stability of the insulation board.
8. The construction method of a cast-in-place concrete system with built-in thermal insulation according to claim 6, characterized in that Step five is as follows: after the insulation board is installed in place and temporarily fixed, it is tied and fixed to the shear wall steel bars; in the building insulation system, flat mesh, angle mesh or U-shaped mesh is required to connect the cast-in-place concrete built-in insulation wall at vertical joints, exterior wall corners and windows; the connection needs to be overlapped by no less than, and reliable measures must be taken to ensure the accurate installation position of the cast-in-place concrete built-in insulation wall and auxiliary fixings; a structural steel bar with a diameter of φ10 is added to the insulation protection layer around the door and window openings, so that the two sides of the opening can be connected to each other from top to bottom.
9. The construction method of a cast-in-place concrete system with built-in thermal insulation according to claim 6, characterized in that Step six is as follows: before reserving and embedding the wire pipes, boxes and embedded parts in the wall, it is necessary to weld the steel mesh insulation board and connect the steel bars; during the construction process, when it is necessary to run the pipe vertically along the wall or cut the steel mesh, after the pipe is laid, use the same specification of steel mesh or steel bars with a diameter of overlap and fix them at the cut point. The overlap length should not be less than and they should be tied firmly.
10. The construction method of a cast-in-place concrete system with built-in thermal insulation according to claim 6, characterized in that Step eight is as follows: additional vertical reinforcement is reserved at the construction site of the cast-in-place concrete built-in insulation wall. φ8 reinforcement can be used. The spacing between the vertical reinforcements is not greater than , and the vertical reinforcements extend to the upper and lower layers for not less than . The additional vertical reinforcements are used to connect and fix the upper and lower insulation boards.