Cast-in-place slab strip template
The combination of composite slabs and anti-adhesive layers solves the problem of difficult demolding of cast-in-place slabs, enabling easy demolding and efficient turnover, thus improving construction quality and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2026-04-07
AI Technical Summary
Cast-in-place slab strips are difficult to demold during construction, and are prone to common quality defects such as roughening, corner chipping and peeling. Repair costs are high, which affects construction progress and structural safety.
The structure adopts a combination of composite slabs, bottom support plates, and anti-adhesive layers. The anti-adhesive layer is set on the contact surface between the bottom support plate and the concrete to form a non-adhesive isolation layer, reducing mechanical interlocking and concrete penetration. Combined with elastic buffering characteristics, it achieves easy demolding and efficient turnover.
It effectively avoids surface defects in cast-in-place slabs, reduces repair costs, improves construction efficiency, enables the recycling of formwork, and ensures a smooth and dense concrete surface.
Smart Images
Figure CN224092969U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to building construction technical field especially relates to a cast-in-place slab belt template. BACKGROUND
[0002] In building structure, in order to improve the stress performance and overall rigidity of floor, a reinforcing belt area reserved between beam or wall and cast in situ is called cast-in-place slab belt, and it is usually a part of floor, which is formed by once pouring concrete in situ.
[0003] However, in the construction process of cast-in-place slab belt, due to the physical and chemical adhesion between existing formwork and concrete in the hardening process, especially in the small structure of slab belt, the formwork space is closed, and the concrete is easy to expand and compact after being vibrated, which leads to the increase of adhesion force; And the joint part is easy to leak or miss the table, and after hardening, it forms a card point, or the concrete wraps the protruding part of the formwork, forming an inverted hook, which makes demolding difficult. After the initial setting of concrete, the volume is slightly reduced, and the formwork restricts its free shrinkage, forming a micro-locking; plus the interface adsorption force, leading to difficult demolding, easy to pull the hair and drop the corner. Therefore, the cast-in-place slab belt generally has the quality defects of flash rib, crack leakage, honeycomb and the like, and the forming appearance quality is difficult to guarantee. If repaired, not only the rework cost increases by 30%-40%, but also the construction period is prolonged, and secondary repair may cause structural damage hazards. UTILITY MODEL CONTENTS
[0004] The utility model aims at providing a cast-in-place slab belt template, which makes it easy to demold after the hardening of concrete, effectively avoids the surface defects of cast-in-place slab belt such as surface pulling, corner dropping and peeling, makes the surface of cast-in-place slab belt flat and compact, saves repair cost, and can be recycled, realizing efficient turnover.
[0005] To achieve this purpose, the utility model adopts the following technical solutions:
[0006] A cast-in-place slab belt template, comprising:
[0007] The superimposed plates are arranged at intervals, and a gap for pouring the cast-in-place slab belt is reserved between adjacent superimposed plates.
[0008] The bottom support plate is arranged at the bottom of the cast-in-place slab belt area, and the two ends thereof are detachably connected with the bottom surfaces of adjacent superimposed plates.
[0009] The anti-adhesion layer is arranged on the bottom support plate and located on the side of the bottom support plate in contact with the cast-in-place slab belt, and the anti-adhesion layer has elasticity.
[0010] Further, the anti-adhesion layer is detachably arranged on the bottom support plate.
[0011] Further, the side of the anti-sticking layer away from the cast-in-place slab strip is detachably connected to the bottom support plate.
[0012] Further, the bottom support plate has a groove on the side in contact with the cast-in-place slab strip, and the anti-sticking layer is placed in the groove.
[0013] Further, the anti-sticking layer has a size greater than the width of the cast-in-place slab strip reserved between adjacent laminated boards and matches the surface size of the bottom support plate.
[0014] Further, the anti-sticking layer has a thickness of 3-6 mm.
[0015] Further, the contact surface of the anti-sticking layer and the cast-in-place slab strip is a smooth plane.
[0016] Further, the anti-sticking layer comprises a silica gel plate.
[0017] Further, the cast-in-place slab strip template further comprises a plurality of bolts, and the plurality of bolts are respectively arranged at both ends of the bottom support plate.
[0018] Further, the cast-in-place slab strip template further comprises a plurality of spring clamps, and the plurality of spring clamps are respectively arranged at the bottom of adjacent laminated boards.
[0019] The utility model discloses the beneficial effect:
[0020] This utility model provides a cast-in-place slab strip formwork, including a composite slab, a bottom support plate, and an anti-adhesion layer. The anti-adhesion layer is provided on the side of the bottom support plate that contacts the cast-in-place slab strip. This anti-adhesion layer forms a non-adhesive isolation layer between the bottom support plate and the concrete, acting as an interface barrier during concrete pouring. It effectively blocks the mechanical interlocking between the concrete and the bottom support plate, preventing concrete from seeping into the micropores of the bottom support plate and generating adhesive forces. Simultaneously, it reduces the tensile force on the bottom support plate during concrete hardening. This makes it less likely for the concrete to stick to the bottom support plate, facilitating demolding after the concrete hardens. It effectively avoids defects such as roughening, chipping, and peeling of the cast-in-place slab strip caused by deformation of the bottom support plate or concrete expansion. The elastic anti-adhesion layer acts as a flexible buffer. Since concrete undergoes a slight volume shrinkage process from initial to final setting, the elastic anti-adhesion layer absorbs the minor deformation of the formwork and buffers the micro-stress caused by the shrinkage of the concrete itself during pouring, resulting in a smooth and dense concrete surface. Meanwhile, since the bottom support plate is detachably connected to the adjacent composite plate, the bottom support plate can be repeatedly recycled, achieving efficient turnover. Attached Figure Description
[0021] Fig. 1 This is a cross-sectional view of the cast-in-place slab with template in this utility model;
[0022] Fig. 2 This is a top view of the cast-in-place slab with template in this utility model.
[0023] In the picture:
[0024] 100. Cast-in-place slab strip;
[0025] 1. Composite board; 2. Bottom support plate; 3. Anti-stick layer. Detailed Implementation
[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0029] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0030] Please refer to Figs. 1-2 As shown, this utility model provides a cast-in-place slab strip template, including a composite plate 1, a bottom support plate 2, and an anti-adhesion layer 3. The composite plates 1 are spaced apart, and a gap is reserved between adjacent composite plates 1 for casting the cast-in-place slab strip 100. The bottom support plate 2 is located at the bottom of the area of the cast-in-place slab strip 100, and its two ends are detachably connected to the bottom surface of the adjacent composite plates 1. The anti-adhesion layer 3 is located on the bottom support plate 2 and is located on the side of the bottom support plate 2 that contacts the cast-in-place slab strip 100. The anti-adhesion layer 3 is elastic.
[0031] The cast-in-place slab strip formwork has an anti-adhesion layer 3 on the side of the bottom support plate 2 that contacts the cast-in-place slab strip 100. The anti-adhesion layer 3 forms a non-adhesive isolation layer between the bottom support plate 2 and the concrete, which acts as an interface isolation during concrete pouring. It can effectively block the mechanical interlocking between the concrete and the bottom support plate 2, and prevent the concrete from seeping into the micropores of the bottom support plate 2 and generating adhesive force. At the same time, it reduces the tensile force on the bottom support plate 2 during the concrete hardening process. As a result, the concrete is less likely to stick to the bottom support plate 2, and it is easier to demold after the concrete hardens. This effectively avoids surface defects such as roughening, corner chipping, and peeling of the cast-in-place slab strip 100 caused by deformation of the bottom support plate 2 or expansion of the concrete, saving secondary repair costs. The anti-stick layer 3 is elastic and acts as a flexible buffer. Since concrete undergoes a slight volume shrinkage process from initial to final setting, the elastic anti-stick layer 3 can absorb minor deformations of the formwork and buffer the micro-stress caused by the shrinkage of the concrete itself during pouring. This results in a smooth and dense concrete surface, preventing concrete adhesion and absorbing the minor deformations generated during pouring. Furthermore, because the bottom support plate is detachably connected to the adjacent composite slab 1, the bottom support plate can be repeatedly recycled, achieving efficient turnover.
[0032] It is understandable that the width of the 100mm strip of the cast-in-place slab should not be less than 370mm, and the actual width can be set according to the actual construction conditions.
[0033] Optionally, the anti-adhesive layer 3 may be, but is not limited to, a silicone sheet or a rubber sheet, etc., without specific limitations.
[0034] Optionally, the bottom support plate 2 may be made of aluminum formwork, but is not limited to aluminum formwork, etc., and no specific limitation is made here.
[0035] In actual construction, the anti-adhesion layer 3 is prone to wear or adhesion of impurities due to the bonding effect of concrete or construction friction, such as... Fig. 1 As shown, for ease of maintenance and replacement, the anti-adhesive layer 3 is detachably mounted on the bottom support plate 2. When the anti-adhesive layer 3 is damaged, only the anti-adhesive layer 3 itself needs to be replaced, without replacing the entire bottom support plate 2, effectively reducing replacement costs and increasing the reusability of structural components. Furthermore, to adapt to the needs of different concrete properties or construction environments, the anti-adhesive layer 3 can also be replaced with different materials (such as silicone, polyurethane, Teflon, etc.) depending on the specific working conditions, thereby enhancing the versatility and adaptability of the bottom support plate 2.
[0036] Optionally, the side of the anti-adhesive layer 3 facing away from the cast-in-place slab strip 100 can be detachably and adhesively connected to the bottom support plate 2; the specific detachable adhesive method includes, but is not limited to, Velcro, removable double-sided tape or re-adhesive pressure-sensitive adhesive film, etc., which are not specifically limited here.
[0037] In other embodiments, the anti-adhesive layer 3 can also be fixed to the bottom support plate 2 by a mechanically detachable connection; the mechanical connection method can be, but is not limited to, bolt connection, etc., and is not limited here.
[0038] In some embodiments, a groove is provided on the side of the bottom support plate 2 that contacts the cast-in-place slab strip 100. The groove is used to accommodate the anti-adhesive layer 3. By providing a groove on the bottom support plate 2, not only is a clear and stable installation position provided for the anti-adhesive layer 3, but the installation efficiency and positioning accuracy of the anti-adhesive layer 3 can also be effectively improved, preventing it from shifting or falling off during construction.
[0039] like Fig. 2 As shown, the planar dimension of the anti-adhesion layer 3 is larger than the width of the cast-in-place slab strip 100 reserved between adjacent composite slabs 1, and matches the surface dimension of the bottom support plate 2; wherein, the size of the anti-adhesion layer 3 is larger than the width of the cast-in-place slab strip 100 area, which can form a covering at the edge of the cast-in-place slab strip 100, effectively preventing concrete from seeping into the gap between the bottom support plate 2 and the composite slab 1 during the pouring process.
[0040] To maintain the good elasticity and cushioning properties of the anti-adhesive layer 3, the thickness of the anti-adhesive layer 3 is 3 mm to 6 mm. A thickness within this range provides appropriate flexibility and cushioning, absorbing minor deformations caused by concrete vibration or shrinkage, and preventing the support plate from deforming or being damaged due to stress concentration. Preferably, the thickness of the anti-adhesive layer 3 is 4 mm.
[0041] To enhance the anti-sticking effect, the contact surface between the anti-sticking layer 3 and the cast-in-place slab strip 100 is a smooth plane. The smooth surface of the anti-sticking layer 3 can effectively reduce the coefficient of friction and mechanical interlocking force between the concrete and the anti-sticking layer 3, prevent the concrete from sticking to the anti-sticking layer 3 during the hardening process, and improve the ease of demolding.
[0042] To facilitate the disassembly of the bottom support plate, the cast-in-place slab with formwork also includes multiple bolts. These bolts are located at both ends of the bottom support plate 2. One end of each bolt can pass through the bottom support plate 2 and be screwed to the bottom surface of the composite slab 1, while the other end of the bolt can abut against the bottom support plate 2. This bolted connection allows for the rapid installation and disassembly of the bottom support plate 2. When the anti-adhesive layer 3 is replaced or the formwork is adjusted, the overall structure can be maintained without damaging it, thus improving construction flexibility.
[0043] In other embodiments, the cast-in-place slab with formwork also includes multiple spring clips, which are respectively located at the bottom of adjacent composite slabs 1. The spring clips can clamp or release the bottom support plate 2. The spring clips can be clamped and released quickly by pressing, without the need for tools such as screwdrivers and wrenches, which greatly reduces installation and disassembly time and is suitable for the needs of rapid on-site construction.
[0044] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A cast-in-place slab with a formwork, characterized in that, include: Composite slabs (1), the composite slabs (1) are spaced apart, and a gap is reserved between adjacent composite slabs (1) for casting in-situ slab strips (100); Bottom support plate (2), the bottom support plate (2) is disposed at the bottom of the area of the cast-in-place slab strip (100), and its two ends are detachably connected to the bottom surface of the adjacent composite slab (1); An anti-stick layer (3) is disposed on the bottom support plate (2) and located on the side of the bottom support plate (2) that contacts the cast-in-place slab strip (100). The anti-stick layer (3) is elastic.
2. The cast-in-place slab with formwork according to claim 1, characterized in that, The anti-stick layer (3) is detachably disposed on the bottom support plate (2).
3. The cast-in-place slab with formwork according to claim 2, characterized in that, The side of the anti-adhesive layer (3) facing away from the cast-in-place slab strip (100) is detachably bonded to the bottom support plate (2).
4. The cast-in-place slab with formwork according to claim 3, characterized in that, The bottom support plate (2) has a groove on the side that contacts the cast-in-place slab strip (100), and the groove is used to accommodate the anti-stick layer (3).
5. The cast-in-place slab with formwork according to claim 2, characterized in that, The planar dimension of the anti-adhesive layer (3) is larger than the width of the cast-in-place strip (100) reserved between the adjacent composite plates (1), and matches the surface dimension of the bottom support plate (2).
6. The cast-in-place slab with formwork according to claim 5, characterized in that, The thickness of the anti-stick layer (3) is 3 mm to 6 mm.
7. The cast-in-place slab with formwork according to claim 5, characterized in that, The contact surface between the anti-stick layer (3) and the cast-in-place slab strip (100) is a smooth plane.
8. The cast-in-place slab with formwork according to any one of claims 1-7, characterized in that, The anti-stick layer (3) includes a silicone sheet.
9. The cast-in-place slab with formwork according to any one of claims 1-7, characterized in that, The cast-in-place slab with template also includes multiple bolts, which are respectively located at both ends of the bottom support plate (2). One end of the bolt can pass through the bottom support plate (2) and be screwed to the bottom surface of the composite plate (1), and the other end of the bolt can abut against the bottom support plate (2).
10. The cast-in-place slab with formwork according to any one of claims 1-7, characterized in that, The cast-in-place slab with template also includes multiple spring clips, which are respectively located at the bottom of adjacent composite slabs (1). The spring clips can clamp or release the bottom support plate (2).