Laminated slab

Abstract

The utility model discloses a laminated slab, and relates to the technical field of floor slabs. The laminated slab comprises a plurality of steel bar trusses; the upper chord steel bar is fixedly arranged between the top ends of the two web bars, and the lower chord steel bar is arranged on the wave part close to the bent part; the plurality of steel bar trusses are arranged on the bottom plate in parallel; the thickness of the bottom plate is 4-30 mm, the 28-day breaking strength of the bottom plate is not lower than 12 MPa, and the 28-day compressive strength of the bottom plate is not lower than 75 MPa; the reinforcing mesh is arranged on the bottom plate, and the transverse reinforcing steel bars penetrate through the wave part; and fiber gridding cloth. The bottom plate with high breaking strength and compressive strength is selected, so that the thickness of the bottom plate is small, the thickness of the bottom plate is not increased, when the bottom plate is used for splicing, the position of a splicing seam is convenient to process, bending moment can be transmitted, the purpose that the two-way plate is stressed when the plate seam is closely spliced is achieved, and the increase of self weight and the increase of manufacturing cost are avoided; and the house delivery quality is improved while the production, transportation and hoisting efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to floor technology field especially relates to a composite board. BACKGROUND

[0002] Traditional cast-in-place floor has the advantages of good structural integrity and good seismic performance, but it is time-consuming and labor-intensive, requires a large number of formwork, has a long construction period, and is difficult to achieve industrialized production; precast floor is easy to achieve building component industrialization, component manufacturing is not limited by season and climate, component quality can be improved, and construction speed is fast, which can save a large amount of formwork and support, but the overall performance is poor, the impermeability is poor, and the anti-seismic performance is poor.

[0003] In the related art, the steel bar truss concrete composite board can combine the advantages of cast-in-place boards and precast boards, has the advantages of fast construction speed, short construction period, light weight of precast components, good overall performance, and saving of formwork, but since the thickness of the precast board should not be less than 60mm, in the case of thin board thickness, the space below the truss is small, which is difficult to meet the demand of pre-embedded water and electricity pipelines. In order to meet the demand of pre-embedded pipelines, the thickness of the board needs to be increased, thereby increasing the self-weight of the building and increasing the cost per square meter. Secondly, the steel bar truss concrete composite board needs to be provided with a beard wire around it, which increases the construction difficulty during construction and installation, reduces the construction efficiency, and greatly increases the cost. In addition, the steel bar truss concrete composite board is prone to cracks, the floor length is short, and the production and hoisting costs are increased.

[0004] Therefore, it is necessary to improve one or more problems in the above-mentioned related technical solutions.

[0005] It should be noted that this part aims to provide background or context for the technical solutions of the utility model stated in the claims. The description herein is not admitted as prior art merely because it is included in this part. UTILITY MODEL CONTENT

[0006] The utility model aims to provide a composite board, thereby at least solving one or more problems caused by the limitations and defects of the related art to some extent.

[0007] The utility model provides a composite board, which comprises:

[0008] A plurality of steel bar trusses, each of which comprises: upper chord steel bars, two lower chord steel bars and two web steels; two web steels are at least partially in a wave shape and are arranged on both sides of the upper chord steel bars respectively, the web steel comprises a wave part at the upper end and a bending part at the lower end, the wave part and the bending part are a plurality of and are arranged alternately; the upper chord steel bars are fixedly arranged between the top ends of the two web steels, and the lower chord steel bars are arranged on the wave part close to the bending part;

[0009] The bottom plate is 4mm-30mm in thickness, 28-day flexural strength is not less than 12MPa, and 28-day compressive strength is not less than 75MPa.

[0010] The steel mesh is arranged on the bottom plate, and comprises a plurality of horizontal steels and a plurality of vertical steels arranged horizontally and vertically, the horizontal steels and the lower chord steels are fixedly connected, and the horizontal steels pass through the wave part.

[0011] The fiber mesh cloth is arranged inside the bottom plate and below the bending part.

[0012] In the utility model, the vertical steel is arranged below the horizontal steel, and the vertical steel and the lower chord steel are arranged on the same plane.

[0013] In the utility model, a plurality of connecting steels are arranged in the horizontal direction of the steel truss, and the connecting steels are used for connecting the plurality of steel trusses into one.

[0014] In the utility model, the fiber mesh cloth is arranged below the bottom plate.

[0015] In the utility model, the fiber mesh cloth is any one of glass fiber mesh cloth, basalt fiber mesh cloth and carbon fiber mesh cloth.

[0016] In the utility model, the connecting mode between the steel mesh and the steel truss is welding.

[0017] In the utility model, the width of the bottom plate is 600mm-4000mm, and the length is 1000mm-18000mm.

[0018] In the utility model, the diameter of the upper chord steel and the lower chord steel of the steel truss is 6-20mm, the diameter of the web steel is 4-7mm, the height of the steel truss is 70-270mm, and the width of the steel truss is 70-90mm.

[0019] In the utility model, the angle between the bending part and the horizontal plane is 0-45°.

[0020] In the utility model, the two ends of the lower chord steel of the steel truss do not extend to the edge of the bottom plate.

[0021] The technical scheme provided by the utility model has the following beneficial effects:

[0022] The utility model discloses a bottom plate with high bending strength and compression strength, so that the thickness of the bottom plate is small, and the thickness of the bottom plate is not increased, when splicing, not only the splicing joint position is convenient to handle, but also the bending moment can be transmitted, the purpose that bidirectional plate stress is realized when the close -packed board joint is avoided, and the increase of dead weight and the improvement of cost are avoided, the strength and the flexibility of the laminated slab are higher through the setting fiber gridding, and the cracking caused by surface tension shrinkage and external force is avoided, the laminated slab of the application improves production, transportation, hoisting efficiency, and improves house delivery quality. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate an embodiment consistent with the present disclosure and, together with the description, serve to explain the principles of the disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained according to the drawings without creative labor for those skilled in the art.

[0024] Figure 1 A perspective structural schematic view of the laminated slab in the exemplary embodiment of the utility model is shown.

[0025] Figure 2 A structural schematic view of the steel bar truss in the exemplary embodiment of the utility model is shown.

[0026] Figure 3 A top view structural schematic view of the laminated slab in the exemplary embodiment of the utility model is shown.

[0027] Figure 4 A 1-1 sectional structural schematic view of the laminated slab is shown. Figure 3

[0028] Figure 5 A structural schematic view of the fiber gridding in the exemplary embodiment of the utility model is shown.

[0029] Reference signs:

[0030] 100, steel bar truss; 101, upper chord steel bar; 102, lower chord steel bar; 103, web steel bar; 1031, wave part; 1032, bending part; 200, bottom plate; 300, steel bar net; 301, horizontal steel bar; 302, vertical steel bar; 400, fiber gridding. DETAILED DESCRIPTION

[0031] ​Example implementations are now described with reference to the drawings. Example implementations can, however, be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the inventive concept to those skilled in the art. The described features, structures, or characteristics can be combined in one or more implementations in any suitable manner.

[0032] In addition, the accompanying drawings are included to provide a further understanding of embodiments of the application, and are incorporated in and constitute a part of this specification. The drawings illustrate examples of the present application and, together with the description, serve to explain the principles of the present application. In the drawings:

[0033] In the present example implementation, a composite slab is provided, referring to Figures 1-5 The composite slab comprises a plurality of steel bar trusses 100, a bottom plate 200, a steel mesh 300 and a fiber mesh 400.

[0034] Specifically, referring to Figure 2 Each steel bar truss 100 comprises a top chord steel bar 101, two bottom chord steel bars 102 and two web steel bars 103.

[0035] The two web steel bars 103 are at least partially wavy, and are arranged on both sides of the top chord steel bar 101, respectively. The web steel bar 103 comprises a wavy part 1031 at the upper end and a bent part 1032 at the lower end. The wavy part 1031 and the bent part 1032 are alternately arranged and are obtained by bending a same steel bar.

[0036] The top chord steel bar 101 is fixedly arranged between the top ends of the two web steel bars 103, and the bottom chord steel bar 102 is arranged on the wavy part 1031 close to the bent part 1032. In addition, a reinforcing bar parallel to the bottom chord steel bar 102 can be arranged at the middle part of the wavy part 1031 of the web steel bar 103 to further improve the strength of the steel bar truss 100.

[0037] A plurality of steel bar trusses 100 are arranged in parallel on the bottom plate 200, and the bent part 1032 is arranged in the bottom plate 200 by pre-burial, post-pouring or pressing. The thickness of the bottom plate 200 is 4mm~30mm, the 28-day flexural strength of the bottom plate 200 is not less than 12MPa, and the 28-day compressive strength is not less than 75MPa.

[0038] Referring to Figure 1 and Figure 4The reinforcing mesh 300 is arranged on the bottom plate 200, the reinforcing mesh 300 comprises a plurality of horizontal reinforcing bars 301 and a plurality of longitudinal reinforcing bars 302 arranged horizontally and vertically, the horizontal reinforcing bars 301 are fixedly connected with the lower chord reinforcing bars 102, and the horizontal reinforcing bars 301 pass through the wave part 1031. The reinforcing mesh 300 is connected with the reinforcing truss 100, and the overall strength is higher.

[0039] Please refer to Figure 4 The fiber mesh 400 is arranged inside the bottom plate 200 and below the bending part 1032.

[0040] In the embodiment, the bottom plate 200 with high bending strength and compressive strength is selected, so that the thickness of the bottom plate 200 is small, the thickness of the bottom plate 200 is not increased, when splicing, not only the splicing seam position is convenient to process, but also the bending moment can be transmitted, the purpose of bidirectional plate stress in the dense plate seam is realized, and the increase of self weight and the increase of cost are avoided; the fiber mesh 400 is arranged, so that the laminated slab has higher strength and flexibility, and cracking caused by surface tension shrinkage and external force is avoided; the laminated slab of the application improves the production, transportation and hoisting efficiency, and improves the house delivery quality.

[0041] On the basis of the above embodiment, optionally, the longitudinal reinforcing bars 302 are arranged below the horizontal reinforcing bars 301, and the longitudinal reinforcing bars 302 and the lower chord reinforcing bars 102 are arranged on the same plane. When the laminated slab is made, the fiber mesh 400 can be laid first, then the high-performance composite material bottom plate 200 is poured, then the reinforcing mesh 300 and the reinforcing truss 100 are welded to form a truss net, which is laid on the bottom plate 200, and finally the laminated slab of the application is formed.

[0042] Optionally, in some embodiments, a plurality of connecting reinforcing bars (not shown in the figure) are arranged in the horizontal direction in the plurality of reinforcing trusses 100, and the connecting reinforcing bars can be welded with the lower chord reinforcing bars 102, and the connecting reinforcing bars are used to connect the plurality of reinforcing trusses 100 into one body. Usually, a plurality of reinforcing trusses 100 are arranged on one bottom plate 200, for example, 4, 5 or the like, and the plurality of reinforcing trusses 100 are welded together by the connecting reinforcing bars to form a whole, so that a plurality of reinforcing trusses 100 can be moved at one time, and the whole is installed on the bottom plate 200, the installation time is saved, and the arrangement of the plurality of reinforcing trusses 100 is facilitated, so that the bearing capacity of the bottom plate 200 is uniform.

[0043] Optionally, in some embodiments, please refer to Figure 4 and Figure 5The fiber mesh cloth 400 has a spacing of 2-5 mm from the lower surface of the bottom plate 200, for example, 3 mm, 4 mm, etc., but is not limited thereto. In the production of the laminated slab, the fiber mesh cloth 400 is laid first, and then the high-performance composite material is poured to form the bottom plate 200.

[0044] Optionally, in some embodiments, the fiber mesh cloth 400 is any one of a glass fiber mesh cloth 400, a basalt fiber mesh cloth 400 and a carbon fiber mesh cloth 400. The fiber mesh cloth 400 can be an alkali-resistant mesh cloth with a mesh center distance of (5-30) mm x (5-30) mm and a linear density of 2000 tex-5000 tex. The glass fiber mesh cloth 400 can be a customized yellow glass fiber mesh cloth, which is made of an alkali-free glass fiber mesh cloth 400 as a base material and then coated with a modified acrylic ester copolymer glue solution, and has high strength, high elastic modulus and high flexibility, which is used to enhance the flexibility of the laminated slab material as a whole to avoid cracking caused by surface tension shrinkage and external force.

[0045] The steel bar truss 100 itself, the connection mode between the steel bar mesh 300 and the steel bar truss 100 can all adopt a welding mode, instead of the conventional binding technology, to save manpower and improve the production efficiency and the structural strength.

[0046] Optionally, in the utility model, the thickness of the bottom plate 200 is 4-30 mm, for example, 10 mm, 20 mm, etc.; the width is 600-4000 mm, for example, 800 mm, 1500 mm, 2000 mm, etc.; and the length is 1000-18000 mm, for example, 2000 mm, 4000 mm, 8000 mm, 10000 mm, etc. The above size setting parameters of the bottom plate 200 can meet the strength requirements of the laminated slab for the building while reducing the thickness of the bottom plate 200.

[0047] Optionally, in the utility model, the diameter of the top chord steel bar 101 and the bottom chord steel bar 102 of the steel bar truss 100 is 6-20 mm, the diameter of the web steel bar 103 is 4-7 mm, the height of the steel bar truss 100 is 70-270 mm, for example, 100 mm, 200 mm, etc., and the width of the steel bar truss 100 is 70-90 mm.

[0048] Optionally, in the utility model, the angle between the bending part 1032 and the horizontal plane is 0-45°, for example, 10°, 20°, etc. The bending part 1032 is used to connect the steel bar truss 100 and the bottom plate 200, so that the connection strength of the two is higher, and the engineering quality can be ensured.

[0049] Optionally, the two ends of the lower chord steel bars 102 of the steel bar truss 100 do not protrude from the bottom plate 200, that is, the length of the lower chord steel bars 102 can be shorter than or equal to the length of the bottom plate 200, for example, the two ends of the lower chord steel bars 102 are flush with the edges of the bottom plate 200. The strength of the laminated slab of the application has met the building requirements, and when splicing, the bottom plate 200 is thin, easy to handle, and does not need to be reinforced around, making construction more convenient.

[0050] It should be noted that in the above embodiments, the bottom plate 200 is selected from high-performance composite materials. The high-performance composite material comprises the following components by weight percentage: cement 20% to 35%, mineral admixture 5% to 15%, sand 50% to 65%, defoaming agent 0.05% to 0.20%, polycarboxylic acid superplasticizer 0.10% to 0.25%, composite expansion agent 1.0% to 3.0%, early strength agent 0.05% to 0.20%; in addition, the total volume of fibers such as steel fibers, polypropylene fibers and polyethylene fibers is 0.20% to 0.70%.

[0051] The specific components of the high-performance composite material are as follows: the cement is 42.5 grade Portland cement;

[0052] The mineral admixture includes S95 mineral powder, secondary fly ash (loss on ignition ≤8.0%), etc., which can strengthen the hydration of the cementitious system, improve the strength, density and impermeability of the laminated slab, and improve the segregation and bleeding performance of the material;

[0053] The sand uses quartz sand or machine-made sand, with a continuous gradation in the three particle size ranges of 1.18mm, 1.18mm to 2.36mm and 2.36mm to 4.75mm, the maximum particle size of the sand is less than or equal to 4.75mm, and the bulk density is 2.5g / cm 3 ~ 3.9g / cm 3 , and the water absorption is not more than 4%;

[0054] The defoaming agent uses an organic silicon defoaming agent, which can be used to eliminate the air bubbles generated during stirring, improve the pore structure of the hardened laminated slab material, and improve the slurry performance;

[0055] The water reducing agent uses a polycarboxylic acid superplasticizer with a water reducing rate of not less than 35%, which can play a dispersing role on cement and other cementitious materials, and improve the fluidity of the mixture;

[0056] The composite expansion agent is compounded from calcium aluminate and lime system materials, providing early and late expansion functions for the laminated slab to prevent or reduce cracks caused by material shrinkage;

[0057] The early strength agent includes lithium sulfate, calcium formate, triethanolamine and other chemical admixtures, which are used singly or in combination.

[0058] In one test example, the performance test results of the bottom plate 200 of the present application are shown in Table 1.

[0059] Table 1 Bottom plate parameter test results

[0060]

[0061] In summary, the present application has the following beneficial effects:

[0062] 1. The prefabricated bottom plate 200 is made of high-performance composite material, which has high strength, high durability, high ductility and crack control ability. The thickness of the prefabricated bottom plate 200 is reduced, the prefabricated component is light in weight, and the production, transportation and installation construction are facilitated, and the construction measure cost is reduced.

[0063] 2. The bottom plate 200 is thin, which increases the space for professional pipeline under the steel bar truss 100, and facilitates on-site construction.

[0064] 3. The bottom plate 200 is thin, so the four sides can not extend the barb, and through the steel bar lapping mode, the stress state of the bidirectional plate can be formed under the condition of the dense spliced joint, and the spliced joint position has no post-poured area, the leveling cross beam can be arranged for leveling, which ensures the construction quality and simplifies the construction process.

[0065] 4. The high-performance composite material has excellent mechanical properties, which can increase the span of the prefabricated bottom plate 200 under the condition of thin plate thickness, realize large-span prefabricated bottom plate 200, reduce the spliced joint in the room, improve the engineering delivery quality, reduce the number of form removal, hoisting and installation, and facilitate construction.

[0066] 5. The high-performance composite material has excellent tensile capacity and crack control capacity, and only by changing the material of the bottom plate 200, the cracking problem of the prefabricated bottom plate 200 in the production, transportation and installation construction process can be avoided, and prestress is not needed.

[0067] 6. The prefabricated bottom plate 200 is made of high-performance composite material, which has excellent durability on one hand, and on the other hand, no prestress process is adopted, and there is no stress relaxation, so it has good durability.

[0068] 7. The bottom plate 200 is thin, and compared with the traditional scheme, the plate thickness is small, and the net height of the house is improved.

[0069] It should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" appearing in the above description can be based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0070] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0071] In the embodiments of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, can also be detachably connected or integrated; can be mechanically connected, can also be electrically connected; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0072] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature "above" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "above", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0073] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the specification.

[0074] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice in the art to which the application pertains. The specification and examples are to be regarded as illustrative only, and the true scope and spirit of the application is indicated by the appended claims.

Claims

1. A laminated board, characterized by, The application relates to a reinforced concrete slab, which comprises the following components: a plurality of steel bar trusses, each of which comprises upper chord steel bars, two lower chord steel bars and two web steels; the two web steels are arranged on the two sides of the upper chord steel bars respectively and are at least partially in a wavy shape, the web steels comprise wavy parts at the upper ends and bending parts at the lower ends, the wavy parts and the bending parts are alternately arranged and are multiple; the upper chord steel bars are fixedly arranged between the top ends of the two web steels, and the lower chord steel bars are arranged on the wavy parts close to the bending parts; a bottom plate, the plurality of steel bar trusses are arranged on the bottom plate in parallel, the bending parts are arranged in the bottom plate through pre-burial, post-pouring or pressing, the thickness of the bottom plate is 4-30 mm, the 28-day flexural strength of the bottom plate is not lower than 12 MPa, and the 28-day compressive strength is not lower than 75 MPa; a steel mesh, the steel mesh is arranged on the bottom plate, the steel mesh comprises a plurality of horizontal steels and a plurality of vertical steels arranged in horizontal and vertical directions, the horizontal steels are fixedly connected with the lower chord steel bars, and the horizontal steels pass through the wavy parts; a fiber mesh cloth, the fiber mesh cloth is arranged in the bottom plate and below the bending parts.

2. The laminated board according to claim 1, wherein The vertical steels are arranged below the horizontal steels, and the vertical steels and the lower chord steel bars are arranged on the same plane.

3. The laminated board according to claim 1, wherein A plurality of connecting steels are arranged in the steel bar trusses in the horizontal direction, and the connecting steels are used for connecting the plurality of steel bar trusses into one.

4. The laminated board according to claim 1, wherein The fiber mesh cloth has a spacing of 2-5 mm from the lower surface of the bottom plate.

5. The laminated board according to claim 1, wherein The fiber mesh cloth is any one of a glass fiber mesh cloth, a basalt fiber mesh cloth and a carbon fiber mesh cloth.

6. The laminated board according to claim 1, wherein The connecting mode between the steel mesh and the steel bar truss is welding.

7. The laminated board according to any one of claims 1 to 6, wherein The width of the bottom plate is 600-4000 mm, and the length is 1000-18000 mm.

8. The laminated board according to any one of claims 1 to 6, wherein The diameters of the upper chord steel bars and the lower chord steel bars of the steel bar truss are 6-20 mm, the diameter of the web steel is 4-7 mm, the height of the steel bar truss is 70-270 mm, and the width of the steel bar truss is 70-90 mm.

9. The laminated board according to any one of claims 1 to 6, wherein The angle between the bending part and the horizontal plane is 0-45 degrees.

10. The laminated board according to any one of claims 1 to 6, wherein The two ends of the lower chord steel bars of the steel bar truss do not protrude from the edges of the bottom plate.

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