CN212336508U

CN212336508U - Light heat-insulating concrete precast slab

Info

Publication number: CN212336508U
Application number: CN202020843299.8U
Authority: CN
Inventors: 岳彦杰; 孙世枭
Original assignee: Hebei Tong Tong Thermal Insulation Material Co ltd
Current assignee: Hebei Tong Tong Thermal Insulation Material Co ltd
Priority date: 2020-05-19
Filing date: 2020-05-19
Publication date: 2021-01-12
Anticipated expiration: 2030-05-19

Abstract

The utility model relates to a technical field especially relates to a light heat preservation concrete precast slab, and the precast slab main part of disclosing includes the foam concrete layer that is close to indoor portion, is close to outdoor portion's outer concrete layer and is located foam concrete and the outer triangular skeleton between the concrete, the inside on foam concrete layer and outer concrete layer is provided with first reinforcing bar net and second reinforcing bar net respectively, the both ends of triangular skeleton are located foam concrete layer and outer concrete layer respectively, and the both ends of triangular skeleton are connected with first reinforcing bar net and second reinforcing bar net respectively.

Description

Light heat-insulating concrete precast slab

Technical Field

The utility model relates to an outer wall building material's technical field especially relates to a light heat preservation concrete prefabricated plate.

Background

As is well known in the building industry, precast concrete slabs, which are produced and formed by precast plants and are directly transported to construction sites for installation, are generally manufactured by the following steps: the method comprises the steps of stringing a plurality of steel bars on two riveting columns in parallel, straightening and twisting the steel bars through machinery to generate prestress, pouring the marked concrete selected according to the requirements of users on the steel bars, cutting the steel bars into a plurality of blocks according to the specifications required by the users after the maintenance period of the steel bars reaches the test anti-seismic and compressive strength, and transporting the steel bars to a construction site for installation and splicing. The concrete precast slab has the advantages that: the prefabricated concrete slab is transported to a construction position, the joint is sealed after splicing is completed in 2-3 days, compared with a cast-in-place concrete structure which needs a maintenance period of 18-35 days, the construction method has the advantages that the working hours can be greatly reduced, hollow structures of various types can be manufactured, and the effects of heat preservation, mass reduction and cost reduction are achieved. Concrete precast slabs are often used for inner walls, non-load bearing walls, floor slabs and other structures in building buildings to reduce the total weight of the building and save the total cost of the building. Concrete slabs, however, also have some significant disadvantages: because gaps exist among the precast concrete plates, if the construction treatment is improper, the floor slab is easy to crack and leak water when the building is settled; the strength is insufficient, and the defects such as cracks and the like are easily generated when the stress is applied.

In recent years, a foam concrete has appeared, which is a concrete product with considerable strength and containing a large amount of fine closed air holes and formed by introducing air or gases such as nitrogen, carbon dioxide, oxygen and the like into a concrete slurry through a chemical or physical mode according to application requirements and reasonably curing and forming, and the conventional application of the foam concrete is as follows: the foam concrete is directly filled to the position needing to be filled by a pump, generally the middle of an interlayer of a floor slab and a wallboard, or is directly manufactured into a foam concrete brick by a mould and then is used for building. But the defects of low strength, cracking, water absorption and the like still exist in the application, and the performance of the composite material is required to be further improved.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a light, heat preservation, sound insulation, antidetonation, high strength can regard as the light heat preservation concrete prefabricated plate that the building outer wall directly used.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: a lightweight thermal insulation concrete precast slab comprises a precast slab main body, wherein the precast slab main body comprises a foam concrete layer close to an indoor part, an outer concrete layer close to an outdoor part and a triangular skeleton positioned between the foam concrete and the outer concrete, a first reinforcing mesh and a second reinforcing mesh are respectively arranged inside the foam concrete layer and the outer concrete layer, two ends of the triangular skeleton are respectively positioned in the foam concrete layer and the outer concrete layer, and two ends of the triangular skeleton are respectively connected with the first reinforcing mesh and the second reinforcing mesh.

Preferably, the triangular framework comprises three transverse bars and a plurality of triangular reinforcing steel bars positioned between the three transverse bars.

Preferably, the transverse bar is made of deformed steel bars with the diameter of 10mm, and the triangular reinforcing bars are formed by bending 6mm reinforcing bars.

Preferably, a circle of sealing groove is arranged on the outer splicing surface of the precast slab main body.

Preferably, the width of the sealing groove is 30mm, and the depth of the sealing groove is 12 mm.

Preferably, the outer side of the precast slab main body is provided with a splicing convex edge and a splicing concave edge which are matched with each other, and the thickness of the splicing convex edge and the splicing concave edge is 40 mm.

(III) advantageous effects

Compared with the prior art, the utility model provides a light heat preservation concrete prefabricated plate possesses following beneficial effect:

1. the lightweight heat-insulating concrete precast slab adopts a composite structure of the outer concrete layer and the foam concrete layer, the foam concrete layer ensures the lightweight, heat-insulating, sound-insulating and earthquake-resistant performances of the precast slab, and the outer concrete layer and the middle triangular framework ensure the overall strength of the precast slab;

2. the lightweight heat-insulating concrete precast slab can effectively prevent the condition of water absorption by being close to an outdoor external concrete layer, reduces the overall weight by being close to an indoor foam concrete layer compared with the existing integral concrete structure, and has the heat-insulating, sound-insulating and anti-seismic properties of the foam concrete;

drawings

FIG. 1 is a schematic perspective view of the main body of the prefabricated panel of the present invention;

FIG. 2 is a schematic structural diagram of the main body section of the prefabricated plate of the present invention;

FIG. 3 is a schematic view of the three-dimensional structure of the triangular frame of the present invention;

in the drawings, the reference numbers: 1. a precast slab main body; 2. a foamed concrete layer; 3. an outer concrete layer; 4. a triangular framework; 5. a first reinforcing mesh; 6. a second reinforcing mesh; 7. transverse ribs; 8. triangular reinforcing steel bars; 9. a sealing groove; 10. splicing the convex edges; 11. and splicing the concave edges.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the lightweight thermal insulation concrete precast slab of the present invention includes a precast slab main body 1, the precast slab main body 1 includes a foam concrete layer 2 near an indoor portion, an outer concrete layer 3 near an outdoor portion, and a triangular frame 4 located between the foam concrete and the outer concrete, a first reinforcing mesh 5 and a second reinforcing mesh 6 are respectively disposed inside the foam concrete layer 2 and the outer concrete layer 3, both ends of the triangular frame 4 are respectively located in the foam concrete layer 2 and the outer concrete layer 3, and both ends of the triangular frame 4 are respectively connected to the first reinforcing mesh 5 and the second reinforcing mesh 6, the triangular frame 4 includes three transverse bars 7 and a plurality of triangular reinforcing bars 8 located between the three transverse bars 7, the transverse bars 7 are threaded bars with a diameter of 10mm, the triangular reinforcing bars 8 are bent by 6mm reinforcing bars, a circle of sealing groove 9 is arranged on the outer splicing surface of the prefabricated plate main body 1, the width of the sealing groove 9 is 30mm, the depth of the sealing groove 9 is 12mm, sealant is filled in the sealing groove 9, the sealing performance and the overall firmness are guaranteed, a splicing convex edge 10 and a splicing concave edge 11 which are matched with each other are arranged on the outer side of the prefabricated plate main body 1, and the thickness of the splicing convex edge 10 and the splicing concave edge 11 is 40 mm; the splicing installation between the precast slab main bodies 1 is facilitated through the splicing convex edge 10 and the splicing concave edge 11.

The lightweight heat-insulating concrete precast slab adopts a composite structure of the outer concrete layer 3 and the foam concrete layer 2, the foam concrete layer 2 ensures the lightweight, heat-insulating, sound-insulating and earthquake-resistant performances, and the outer concrete layer 3 and the middle triangular framework 4 ensure the overall strength; the outer concrete layer 3 close to the outdoor can effectively prevent the condition of water absorption, and the foam concrete layer 2 close to the indoor reduces the overall weight compared with the existing overall concrete structure, and has the heat preservation, sound insulation and anti-seismic performance of the foam concrete.

A method for manufacturing a lightweight heat-insulating concrete precast slab comprises the following steps:

A. welding and forming the triangular framework 4 in advance;

B. arranging a second reinforcing mesh 6 of the outer concrete layer 3 on the plane mould table, and applying certain tension and prestress to the reinforcing steel bars of the second reinforcing mesh 6;

C. welding the manufactured triangular fixing frame in the step A and the second reinforcing mesh 6 arranged in the step B together;

D. pouring concrete slurry into the mould table until the surface of the slurry is higher than one third of the height of the triangular framework 4, and trowelling the surface of the slurry, wherein the thickness of the outer concrete layer 3 is 110 mm;

E. after curing for 2-3 days, welding a first reinforcing mesh 5 of the foam concrete layer 2 above the triangular framework 4, and applying certain tension and prestress to the first reinforcing mesh 5;

F. then pouring foam concrete slurry, and then trowelling the foam concrete slurry, wherein the thickness of the foam concrete layer 2 is 125 mm;

G. and (5) after 15 days of maintenance, removing the mold to obtain a finished product.

The manufacturing method of the light heat-preservation concrete precast slab has simple production process, and the prepared precast slab has light weight, heat preservation, sound insulation and high strength, and is suitable for batch production.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The lightweight heat-preservation concrete precast slab is characterized by comprising a precast slab main body (1), wherein the precast slab main body (1) comprises a foamed concrete layer (2) close to an indoor part, an outer concrete layer (3) close to an outdoor part and a triangular framework (4) positioned between the foamed concrete and the outer concrete, the foamed concrete layer (2) and the outer concrete layer (3) are internally provided with a first reinforcing mesh (5) and a second reinforcing mesh (6) respectively, two ends of the triangular framework (4) are positioned in the foamed concrete layer (2) and the outer concrete layer (3) respectively, and two ends of the triangular framework (4) are connected with the first reinforcing mesh (5) and the second reinforcing mesh (6) respectively.

2. A lightweight insulating concrete precast slab according to claim 1, characterized in that said triangular frame (4) comprises three transverse bars (7) and a plurality of triangular reinforcing bars (8) between the three transverse bars (7).

3. The precast slab of lightweight thermal insulation concrete according to claim 2, wherein the transverse bar (7) is made of deformed steel bar with the diameter of 10mm, and the triangular reinforcing bar (8) is formed by bending a reinforcing bar with the diameter of 6 mm.

4. A lightweight thermal insulation concrete precast slab according to claim 1, characterized in that a ring of sealing grooves (9) is arranged at the outer splicing surface of the precast slab main body (1).

5. A lightweight insulating concrete slab according to claim 4, characterized in that the width of said sealing groove (9) is 30mm and the depth of said sealing groove (9) is 12 mm.

6. A lightweight thermal insulation concrete precast slab according to claim 1, characterized in that the outer side of the precast slab main body (1) is provided with a splicing convex edge (10) and a splicing concave edge (11) which are matched with each other, and the thickness of the splicing convex edge (10) and the splicing concave edge (11) is 40 mm.