WO2018161848A1

WO2018161848A1 - Prefabricated exterior wall panel for assembly, providing structural integration and energy saving, and fabrication method thereof

Info

Publication number: WO2018161848A1
Application number: PCT/CN2018/077805
Authority: WO
Inventors: 章一萍; 唐丽娜; 周练; 隗萍; 陈刚
Original assignee: 四川省建筑设计研究院
Priority date: 2017-03-07
Filing date: 2018-03-02
Publication date: 2018-09-13
Also published as: CN106917460A

Abstract

A prefabricated exterior wall panel for assembly, providing structural integration and energy saving comprises a prefabricated exterior wall panel body (9). The prefabricated exterior wall panel body (9) comprises lightweight aggregate concrete surface layers (1), a rigid polyurethane foam core layer (2), and a steel mesh frame (3). Six mesh frame surfaces of the steel mesh frame (3) are correspondingly disposed, by means of pouring, inside six lightweight aggregate concrete surface layers (1). A cavity defined by the six lightweight aggregate concrete surface layers is filled with the rigid polyurethane foam core layer (2). A fabrication method of a prefabricated exterior wall panel for assembly, providing structural integration and energy saving comprises: preparing a steel mesh frame (3); preparing a wall panel mold; coating the inside of the mold with a separant; pouring lower layer lightweight aggregate concrete into the mold, placing the steel mesh frame (3), spraying rigid polyurethane (PU) foam evenly, and pouring upper layer lightweight aggregate concrete; and performing curing and demolding to obtain a final product of a prefabricated exterior wall panel body (9). The concrete surface of the exterior wall panel and the thermal insulation polyurethane layer firmly bond with each other, ensuring cooperation between layers of the wall panel, achieving thermal insulation and structural integration, and facilitating construction.

Description

Structure and energy-saving integrated prefabricated prefabricated exterior wall panel and preparation method thereof

Technical field

The invention relates to the field of building engineering, in particular to a structural and energy-saving integrated prefabricated prefabricated exterior wall panel and a preparation method thereof.

Background technique

China is in an important stage of accelerating industrialization and urbanization. It is a contradictory stage of environmental constraints and rapid economic and social development. The form of energy conservation and emission reduction is severe, and the traditional construction industry has problems such as high energy consumption and large disturbance to the environment. Therefore, since 2013, China has successively issued the “Green Building Action Plan” and “Several Opinions on Promoting the Development and Reform of the Construction Industry”, calling for green energy-saving buildings and prefabricated buildings as the main production methods. Take the road of industrialization of new buildings and realize the active transformation and upgrading of the construction economy.

Building wall is an important part of the building, accounting for about one-third of the total construction volume of the building. Realizing the transformation of the building wall from traditional artificial block to industrial wallboard is an important measure to realize the industrialization of the building. Among them, the external wall of the building is the outer protection structure with the most contact with the outdoor environment, and it is also the largest energy-consuming component. Its thermal insulation performance has a great influence on the energy consumption of the building, especially in the heating energy consumption. It accounts for one-third of the total energy consumption. In addition, a large number of earthquake damages indicate that the traditional building maintenance wall is seriously damaged during the earthquake, and a large number of deformations, damages, and even collapses endanger the personal safety. Therefore, the insulation and energy conservation of the building's exterior walls and structural safety are of paramount importance. In October 2015, the Ministry of Industry and Information Technology released the Action Plan for Promoting the Production and Application of Green Building Materials (Ministry of Industry and Information Technology, No. 309 [2015]) [] proposed to focus on the development of intrinsically safe and energy-saving, lightweight and high-strength wall materials. Develop external wall insulation materials with good insulation, heat insulation and fireproof performance, convenient construction and long service life, and develop and promote structural and thermal insulation and decorative exterior wall panels.

Nowadays, the traditional external wall insulation practice has the following four problems: 1. The technical regulations for external thermal insulation engineering of the external wall JGJ144 stipulates that the service life of the external thermal insulation project should not be less than 25 years, so the external thermal insulation of the external wall cannot be There is no good solution for the problems of building life, late enclosing and replacement. 2, the insulation material is flammable, such as the CCTV fire in 2009, its outer layer is only flammable polystyrene board, resulting in a fire is not acceptable, this fire caused direct economic losses of hundreds of millions. 3. The second construction of building insulation, the insulation system and the main structure are constructed separately, and the construction period is extended. 4. There are still wet operations on site, and the degree of industrialization is low.

Therefore, the present invention proposes a structural and energy-saving integrated prefabricated prefabricated exterior wall panel and a production method thereof, aiming at green energy conservation, aiming at solving the technical defects of the traditional building wall insulation system, and closely conforming to the development requirements of the building industrialization. It achieves the same life span of insulation and construction, integrates heat preservation, enclosing and structure, and industrial production and construction of wall and heat preservation at the same time, which is conducive to the promotion of building energy-saving industrialization.

Summary of the invention

The object of the present invention is to overcome the deficiencies of the prior art, and to provide a structural and energy-saving integrated prefabricated prefabricated exterior wall panel and a preparation method thereof, so as to solve the problem of the external wall external thermal insulation falling off, the external wall thermal insulation and the different life of the building in the prior art, Secondary construction of external wall insulation, flammability of external wall insulation, etc.

The invention is achieved by the following technical solutions:

A structural and energy-saving integrated prefabricated exterior wall panel, comprising a prefabricated exterior wall panel body, the prefabricated exterior wall panel body comprising a lightweight aggregate concrete surface layer, a rigid foamed polyurethane sandwich layer and a steel wire mesh frame, The outer layer of the prefabricated outer wall panel body is a lightweight aggregate concrete surface layer, and the grid surface of the steel mesh grid is correspondingly placed in the lightweight aggregate concrete surface layer, and the lightweight aggregate concrete surface layer is enclosed The cavity is filled with a rigid foamed polyurethane sandwich layer.

Further, the lightweight aggregate concrete surface layer is made of ceramsite concrete pouring. Ceramsite concrete has the same strength as ordinary concrete, but its weight is lower and its thermal insulation performance is better.

Further, the wire mesh frame is composed of an upper steel wire mesh, a lower steel wire mesh and a unidirectionally arranged oblique wire truss, and the oblique wire truss is connected between the upper steel mesh and the lower steel mesh.

Further, the upper steel wire mesh is vertically staggered by a vertically disposed longitudinal steel wire and a horizontally disposed transverse steel wire; the lower steel wire mesh is also vertically formed by a vertically disposed longitudinal steel wire and a uniformly disposed transverse steel wire.

Further, the longitudinal steel wires of the upper steel mesh sheet and the lower steel mesh sheet are vertically aligned, and the transverse steel wires of the upper steel mesh sheet and the lower steel mesh sheet are also vertically aligned, and one of the upper rows of the upper steel mesh is selected. The staggered point is connected to the first staggered point in the upper and lower rows of the lower layer of the steel wire mesh through the oblique wire truss, and the oblique wire truss in the same column is obliquely arranged in the same direction, and the inclined wire truss of the adjacent two columns are inclined differently. Settings.

The invention is achieved by another technical solution as follows:

A method for preparing a structural and energy-saving integrated prefabricated exterior wall panel, comprising the steps of:

Step 1) welding the upper steel wire mesh and the lower steel wire mesh with the unidirectionally arranged oblique wire truss to form a steel mesh frame (3);

Step 2) preparing a wallboard mold according to the size of the prefabricated outer wall panel body;

Step 3) applying a release agent in the mold;

Step 4) pouring the lower layer of lightweight aggregate concrete into the mold, vibrating;

Step 5) placing the wire mesh frame and positioning the grid;

Step 6) uniformly spraying the rigid foamed polyurethane PU; PU foaming, hard forming into a rigid foamed polyurethane sandwich layer;

Step 7) Pouring the upper layer of lightweight aggregate concrete, vibrating and smoothing;

Step 8) After a period of maintenance, demolding forms a finished product of the prefabricated exterior wall panel body.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

1. The concrete layer and the PU insulation layer are firmly combined by the rough surface of the lightweight aggregate concrete surface layer, the oblique insertion wire and the adhesion of the polyurethane itself, so as to ensure that the layers of the wall panel are working together to achieve the integration of insulation and structure. Chemical

2. Industrial production and construction of wall and heat preservation at the same time, simplifying the construction process;

3. When the wallboard is in use, the sandwich insulation layer is located in a closed space and is in a static state, protected from external environment such as ultraviolet radiation and fire, thereby achieving the same life span of the insulation layer and the wall;

4. In the case of meeting the requirements for heat preservation and energy saving of Class A public buildings, the thickness of the wallboard of the present invention is reduced by 29.1% compared with the traditional steel mesh frame polystyrene board; in the case of meeting the requirements for heat preservation and energy saving of Class B public buildings and residential buildings, The wall panel of the invention is reduced by 41.2% compared with the traditional steel mesh frame polystyrene board, and the thickness of the wall is greatly reduced, which provides users with more space for use.

DRAWINGS

The drawings are intended to provide a further understanding of the embodiments of the present invention, and are not intended to limit the embodiments of the invention. In the drawing:

1 is a schematic structural view of a prefabricated exterior wall panel of a structural and energy-saving integrated assembly according to the present invention;

Figure 2 is a schematic cross-sectional view of the A-A of Figure 1 of the present invention;

Figure 3 is a schematic cross-sectional view of the B-B of Figure 1 of the present invention;

Figure 4 is a schematic structural view of a wire mesh frame of the present invention;

Figure 5 is a schematic view showing the manufacturing process of the present invention;

Marked and corresponding part names in the drawing:

1-light aggregate concrete surface layer, 2-hard foamed polyurethane sandwich layer, 3-steel grid, 4-upper steel mesh, 5-lower steel mesh, 6-slanted wire truss, 7-longitudinal Wire, 8-cross wire, 9-prefabricated siding body, 10--interlaced point, 11-first staggered point.

detailed description

The present invention will be further described in detail below with reference to the embodiments and the accompanying drawings. As a limitation of the invention.

Example 1

As shown in FIG. 1-4, the present invention relates to a structural and energy-saving integrated prefabricated exterior wall panel, comprising a prefabricated exterior wall panel body 9. The prefabricated exterior wall panel body 9 comprises a lightweight aggregate concrete surface layer 1, and a hard hair. The polyurethane sandwich core layer 2 and the steel mesh frame 3, the six outer layers of the prefabricated outer wall panel body 9 are all light aggregate concrete surface layers 1, and the steel mesh frame 3 is a square frame, and the steel mesh sheets and the one-way arrangement are arranged. The oblique wire welding of a row of diagonally inserted wire trusses is formed in the same direction to form a steel wire mesh frame 3, and the six mesh surfaces of the steel wire mesh frame 3 are correspondingly poured into the six light aggregate concrete surface layers 1 through The wire mesh frame 3 can connect the six lightweight aggregate concrete surface layers 1 into a solid integral structure, and provides the integration of the overall structure of the prefabricated outer wall panels, and the six surrounding chambers of the lightweight aggregate concrete surface layer 1 The body is filled with a rigid foamed polyurethane sandwich layer 2. The lightweight aggregate concrete surface layer 1 is made of ceramsite concrete. Ceramsite concrete has the same strength as ordinary concrete, but its weight is lower and its thermal insulation performance is better.

As shown in FIG. 5, a method for manufacturing a structural and energy-saving integrated prefabricated exterior wall panel: welding the steel mesh sheet and the unidirectionally arranged oblique wire to form a steel mesh frame 3; preparing the wall plate mold according to the wall plate size Applying a release agent to the mold, pouring the lower layer of ceramsite concrete, vibrating; placing the wire mesh frame, positioning the grid; uniformly spraying the B1 grade rigid foamed polyurethane PU; PU foaming, hard forming; pouring the upper layer of ceramsite concrete , vibrating, smoothing; through a period of maintenance, demoulding to form a finished product. The ceramsite concrete has the same strength as ordinary concrete, but the weight is lower, and the heat preservation performance is better. The PU has better insulation performance than the traditional polystyrene board; therefore, the wall panel provided by the invention has more insulation effect than the traditional steel mesh frame polystyrene board. it is good. The production process also greatly simplifies the production process of the traditional steel wire mesh polystyrene board. At the same time, it can solve the problems existing in the traditional external wall insulation practice, such as the outer wall insulation layer falling off, the wall and the insulation layer have different life spans, and the insulation material is flammable.

In summary, the wall panel prepared by the above structure has the following advantages: a structure and an energy-saving integrated prefabricated exterior wall panel have the following advantages:

1. The concrete layer and the PU insulation layer are firmly combined by the rough surface of the lightweight aggregate concrete surface layer, the oblique insertion wire and the adhesion of the polyurethane itself, so as to ensure that the layers of the wall panel are working together to achieve the integration of insulation and structure. Chemical.

2. The industrial production and construction of the wall and heat preservation at the same time simplifies the construction process.

3. In the use stage of the wallboard, the sandwich insulation layer is located in the closed space and is in a static state, and is protected from the external environment such as ultraviolet radiation and fire, thereby achieving the same life span of the insulation layer and the wall.

Example 2

As shown in FIG. 4, a structural and energy-saving integrated prefabricated prefabricated exterior wall panel, on the basis of the first embodiment, the steel mesh frame 3 is composed of an upper steel mesh sheet 4, a lower steel mesh sheet 5 and a unidirectionally arranged oblique wall. The wire truss 6 is formed, and the oblique wire truss 6 is connected between the upper steel wire mesh 4 and the lower steel wire mesh 5. The upper steel wire mesh 4 is vertically staggered by a longitudinally disposed longitudinal steel wire 7 and a uniformly disposed transverse steel wire. The lower steel wire mesh 5 is also vertically interlaced by a longitudinally disposed longitudinal steel wire 7 and a uniformly disposed transverse steel wire 8. .

The upper steel wire mesh 4 and the longitudinal steel wire 7 of the lower steel wire mesh 5 are vertically aligned, and the transverse steel wires 8 of the upper steel wire mesh 4 and the lower steel mesh 5 are also vertically aligned, and the upper steel mesh 4 is in the same column. Selecting a certain interlacing point 10 and the lower layer of the steel mesh sheet 5 in a row correspondingly obliquely to the first staggering point 11 is connected by the oblique wire truss 6, the first staggering point is: the lower layer of the steel mesh 5 is corresponding to the upper and lower columns An interlaced point adjacent to the corresponding staggered point of a certain staggered point, the oblique skein truss 6 in the same column is obliquely disposed the same, and the oblique truss 6 of the adjacent two columns are diagonally arranged differently.

By adopting the structure of the above-mentioned steel wire mesh frame 3, the upper steel wire mesh 4 and the lower steel wire mesh 5 are connected by the oblique wire truss 6 , and in the structure of the steel mesh frame 3 of the same thickness, the oblique wire truss 6 can be used, which can be increased. The insertion length of the obliquely inserted wire truss 6 in the rigid foamed polyurethane sandwich layer 2 is advantageous for improving the strength of the rigid foamed polyurethane sandwich layer 2 and improving the service life of the wallboard, and the obliquely inserted wire truss 6 in the same column. The diagonally the same arrangement facilitates the production of the wire mesh frame 3; the adjacent two rows of oblique wire trusses 6 are arranged obliquely differently, so that the oblique wire trusses 6 are alternately arranged, which can increase the connection strength of the wire mesh frame 3, and effectively avoid prefabrication. The wall panel bursts, or the outer layer of lightweight aggregate concrete surface 1 falls off.

Example 3

As shown in FIG. 5, a method for preparing a structural and energy-saving integrated prefabricated exterior wall panel comprises the steps of:

Step 1) welding the upper steel mesh sheet 4 and the lower steel mesh sheet 5 and the unidirectionally arranged oblique wire truss 6 to form a steel mesh frame 3;

Step 2) preparing a wallboard mold according to the size of the prefabricated outer wall panel body 9;

Step 3) applying a release agent in the mold;

Step 5) placing the wire mesh frame 3, positioning the grid;

Step 6) uniformly spraying the rigid foamed polyurethane PU; PU foaming, hard forming into a rigid foamed polyurethane sandwich layer 2;

Step 8) After a period of maintenance, demoulding forms a finished product of the prefabricated exterior wall panel body 9.

The ceramsite concrete has the same strength as ordinary concrete, but the weight is lower, and the heat preservation performance is better. The PU has better insulation performance than the traditional polystyrene board; therefore, the wall panel provided by the invention has more insulation effect than the traditional steel mesh frame polystyrene board. it is good. The production process also greatly simplifies the production process of the traditional steel wire mesh polystyrene board. At the same time, it can solve the problems existing in the traditional external wall insulation practice, such as the outer wall insulation layer falling off, the wall and the insulation layer have different life spans, and the insulation material is flammable.

In summary, the wallboard prepared by the above method has the following advantages:

The specific embodiments of the present invention have been described in detail with reference to the preferred embodiments of the present invention. All modifications, equivalent substitutions, improvements, etc., made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

A structural and energy-saving integrated prefabricated exterior wall panel, comprising a prefabricated exterior wall panel body (9), characterized in that the prefabricated exterior wall panel body (9) comprises a lightweight aggregate concrete surface layer (1), hard a foamed polyurethane sandwich layer (2) and a steel mesh frame (3), the outer layer of the prefabricated outer wall panel body (9) is a lightweight aggregate concrete surface layer (1), the steel mesh frame (3) The grid faces are correspondingly placed in the six lightweight aggregate concrete surface layers (1), and the cavity surrounded by the lightweight aggregate concrete surface layer (1) is filled with a rigid foamed polyurethane sandwich layer (2) ).
The structural and energy-saving integrated prefabricated exterior wall panel according to claim 1, wherein the lightweight aggregate concrete surface layer (1) is made of ceramsite concrete pouring.
The structural and energy-saving integrated prefabricated exterior wall panel according to claim 1, wherein the steel mesh frame (3) comprises an upper steel mesh (4), a lower steel mesh (5) and The unidirectionally arranged oblique wire truss (6) is connected between the upper wire mesh (4) and the lower steel wire mesh (5).
A structural and energy-saving integrated prefabricated exterior wall panel according to claim 3, wherein said upper steel wire mesh (4) is provided by a longitudinally disposed longitudinal steel wire (7) and a uniform lateral direction. The steel wires (8) are vertically staggered; the lower steel wire mesh (5) is also vertically staggered by a longitudinally disposed longitudinal steel wire (7) and a uniformly disposed transverse steel wire (8).
The structural and energy-saving integrated prefabricated exterior wall panel according to claim 4, wherein the upper steel wire mesh (4) and the longitudinal steel wire (7) of the lower steel mesh (5) are vertically aligned The transverse steel wire (8) of the upper steel wire mesh (4) and the lower steel wire mesh (5) is also arranged vertically above and below, and an intersecting point (10) is selected in the same column on the upper steel mesh (4). The lower layer of steel mesh (5) is connected to the first staggered point (11) in the upper and lower rows by the obliquely inserted wire truss (6), and the diagonally inserted wire trusses (6) in the same column are arranged obliquely in the same direction, adjacent to the two The diagonal splicing trusses (6) of the columns are arranged diagonally differently.
The invention relates to a method for preparing a structure and energy-saving integrated prefabricated exterior wall panel, which comprises the steps of:

Preparing a steel mesh frame: welding an upper steel mesh sheet (4) and a lower steel mesh sheet (5) with a unidirectionally arranged oblique wire truss (6) to form a steel mesh frame (3);

Preparing a wallboard mold: preparing a wallboard mold according to the size of the prefabricated exterior wall panel body (9);

Prepare for casting to prepare wallboard: apply a release agent to the mold;

Preparation of wallboard: pouring the lower layer of lightweight aggregate concrete into the mold, vibrating; placing the steel mesh frame (3), positioning the grid; uniformly spraying the rigid foamed polyurethane PU; PU foaming, hard forming into hard foaming Polyurethane sandwich layer (2); pouring the upper layer of lightweight aggregate concrete, vibrating, smoothing;

Maintenance: After a period of maintenance, demoulding forms the finished product of the prefabricated exterior wall panel (9).