CN204475591U - One exempts from form removal sandwich foam concrete wall - Google Patents

Abstract

A formwork-free sandwich foam concrete wall body, comprising a formwork-free formwork, a steel wire grid, a thermal insulation board, support pads, formwork tie rods, and cast-in-place foam concrete. The insulation board is located in the middle of the wall; the steel wire mesh frame is composed of two pieces of steel wire mesh and abdominal wire, wherein the steel wire mesh is located on both sides of the insulation board and keeps a certain distance from the insulation board. The steel wire sheets are connected together by abdominal wires to form a steel wire grid, and the abdominal wires pass obliquely through the insulation board; Control the distance between the non-demolition formwork and the insulation board; cast-in-place foam concrete is poured between the non-demolition formwork and the insulation board; The distance between the side non-demolition formwork controls the thickness of the wall and fixes the position of the non-demolition formwork to ensure that the non-demolition formwork does not shift when pouring concrete.

Description

A form-free sandwich foam concrete wall

technical field

The utility model relates to a novel building wall body, in particular to a formwork-free sandwich foam concrete wall body.

Background technique

At present, the external wall insulation technology is mostly used for building wall insulation. Due to the poor fire resistance and water resistance of the insulation materials, and the cracking and damage of the outer covering material of the insulation board, the external insulation of the external wall is easy to burn, easy to enter water, easy to crack and damage, Easy to fall and other problems reduce the insulation effect of the wall and reduce the service life of the insulation material. Ordinary external wall sandwich insulation technology puts the insulation material in the middle of the wall, which reduces the risk of the insulation material being ignited. However, due to the lack of reliable connection measures between the insulation material and the wall, the insulation board is easy to separate from the wall, and the wall The integrity of the wall is poor, the anti-seismic effect is not good, and it will also affect the service life of the wall. Some building energy saving and structural integration technologies can achieve building energy saving and the same life span as the structure, but the construction process is more complicated and the cost is higher. During the construction process, the cast-in-place wall needs to be disassembled and assembled repeatedly, which increases the workload on site and reduces the efficiency of construction. The name is: an invention patent for a cast-in-place lightweight thermal insulation wall without form removal and its construction method (application number: 201210576388.0). This technical solution solves the problem of repeated disassembly and assembly of the formwork, but the thermal insulation layer is still in the On the outside of the wall, although certain reinforcement measures have been taken for the insulation layer, the problems of flammability, cracking, and falling of the insulation layer have not been fundamentally resolved.

Contents of the invention

In order to ensure the integrity of the wall and improve the thermal insulation effect and service life of the wall, the utility model provides a formwork-free sandwich foam concrete wall. The construction of the wall is simple, the external formwork and the formwork tie rods of the wall are not removed after the construction is completed as a part of the wall, and the thermal insulation material is placed in the middle of the wall to protect the thermal insulation material from being damaged by external factors.

In order to solve the above technical problems, the technical solution of the utility model is:

A formwork-free sandwich foam concrete wall body, comprising a formwork-free formwork, a steel wire grid, a thermal insulation board, support pads, formwork tie rods, and cast-in-place foam concrete. The insulation board is located in the middle of the wall; the steel wire grid frame is composed of two pieces of steel wire mesh and abdominal wire, wherein the steel wire mesh is located on both sides of the insulation board and keeps a certain distance from the insulation board. The steel wire sheets are connected together by abdominal wires to form a steel wire grid, and the abdominal wires pass obliquely through the insulation board; Control the distance between the non-demolition formwork and the insulation board; cast-in-place foam concrete is poured between the non-demolition formwork and the insulation board; The distance between the side non-demolition formwork controls the thickness of the wall and fixes the position of the non-demolition formwork to ensure that the non-demolition formwork does not shift when pouring concrete.

The demolition-free formwork is made of non-combustible materials with good water resistance, good impermeability, and excellent machinability. The preferred materials are fiber-reinforced cement boards, fiber-reinforced calcium silicate boards, and the like.

The steel wire frame is made of stainless steel, the diameter of the steel wire mesh is greater than 3mm, the mesh size of the steel mesh is 50mm×50mm, the steel mesh covers both sides of the insulation board, and the distance between the insulation board and the insulation board is not less than 20mm.

The arrangement shape of the pads is staggered and square, the section size of the support pads is 50mm×50mm, the distance between the support pads is 150-200mm, and the materials used are concrete pads, mortar pads, plastic pads .

The cast-in-place foam concrete is prepared by ordinary Portland cement, foaming agent, fly ash and lightweight aggregate, etc., and its thermal conductivity is not greater than 0.12W/(m·K), and it has good workability. Pumpable for pouring.

The thermal insulation board should be a thermal insulation board with a thermal conductivity of less than 0.06W/(m·K), and has a certain pressure resistance, is not easy to deform, and has a combustion rating of not lower than B2.

As an improvement, on the outside of the non-demolition formwork, the formwork tie rods pass through the place where the non-demolition formwork is, and there is also a grout-stop gasket, which can prevent the poured foam concrete slurry from seeping through the tie rods, and its material is preferably Non-combustible insulation.

Working principle of the present utility model and beneficial effect are:

The formwork-free sandwich foam concrete wall composed of formwork-free formwork, support pads, steel wire grids, insulation boards, and formwork tie rods is easy to construct, which can reduce the removal process of formwork and formwork tie-rods and improve construction efficiency. The wall has light weight , long life, good integrity, excellent thermal insulation performance, good shock resistance, fire prevention and impermeability, good sound insulation performance and so on.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Figure 2 is a schematic diagram of the staggered distribution of support pads on the wire grid;

Figure 3 is a schematic diagram of the square distribution of the support pads on the steel wire grid;

In the figure: 1. Insulation board, 2. Formwork tie rod, 3. Support pad, 4. Free formwork, 5. Steel wire grid frame, 5-1. Steel wire mesh, 5-2. Abdominal wire, 6. Cast-in-place Foam concrete, 7, grout stop gasket.

Detailed ways

A formwork-free sandwich foam concrete wall body, comprising a formwork-free formwork 4, a steel wire grid frame 5, a thermal insulation board 1, support pads 3, formwork tie rods 2, and cast-in-place foam concrete 6. The insulation board 1 is located in the middle of the wall; the steel wire frame 5 is composed of two steel wire mesh sheets 5-1 and abdominal wires 5-2, wherein the steel wire mesh sheets 5-1 are located on both sides of the insulation board 1, and Keep a certain distance from the insulation board 1, and the steel wire sheets 5-1 on both sides of the insulation board 1 are connected together by the abdominal wire 5-2 to form a steel wire grid 5, and the abdominal wire 5-2 obliquely passes through the insulation board; no need to dismantle the formwork 4 is located at the outermost side of the wall, and a support pad 3 is provided between the non-dismantling formwork 4 and the insulation board 1, and the support pad 3 can control the distance between the non-disassembly formwork 4 and the insulation board 1; the disassembly-free formwork 4 and the insulation board 1 is poured with cast-in-situ foam concrete 6; the formwork tie rod 2 passes through the non-demolition formwork 4 and the insulation board 1, and by adjusting the length of the formwork tie rod 2, the distance between the two sides of the non-demolition formwork 4 can be adjusted to control the thickness of the wall. And fix the free formwork 4 position, guarantee that the free formwork 4 does not produce displacement when pouring concrete. On the outside of the non-demolition template 4, the template tie rod 2 passes through the part 4 of the non-demolition template, and a grout stop gasket 7 is also provided. The grout stop gasket 7 can prevent the poured foam concrete slurry from seeping through the template tie rod 4, Its material is preferably a non-combustible heat insulating material.

Apply the utility model to the building wall, prefabricate the steel wire grid frame 5 on the heat preservation board 1, after determining the position of the heat preservation board 1, arrange the support blocks 3 evenly on both sides of the heat preservation board 1 in a square or staggered shape, and the heat preservation board 1 The support pads 3 on both sides are arranged in a staggered manner, and the non-demolition formwork 4 is installed on both sides of the insulation board 1 respectively. The support pads 3 are used to control the distance between the non-demolition formwork 4 and the insulation board 1. 4 Drill holes on the insulation board 1 so that the template tie rod 2 passes through. The outer side of the formwork tie rod is covered with heat insulation material, and the length is adjustable. Install grout-stop gaskets 7 on both sides of the formwork tie rod 2 to prevent the concrete slurry from falling from the surface during concrete pouring. Grout leaks at the perforation of the formwork, fasten the non-demolition formwork 4, the insulation board 1 and the support pad 3 together with the formwork tie rod 2, and pour foam concrete in the space between the two sides of the insulation board 1 and the non-demolition formwork 4. After the concrete reaches the specified age, the formwork 4 and the formwork tie rod 2 are not dismantled. Before the construction of the wall surface, the two ends of the formwork tie rod 2 are insulated to prevent heat transfer. The utility model is easy to construct, can reduce the dismantling process of formwork and formwork tie rods, and improve construction efficiency. The wall has the advantages of light weight, long life, good integrity, excellent thermal insulation performance, good shock resistance, fire prevention and impermeability, and good sound insulation performance. .

Claims (7)

1. A formwork-free sandwich foam concrete wall, including formwork-free formwork (4), steel wire grid (5), insulation board (1), support pads (3), formwork tie rods (2), cast-in-place Foam concrete (6), characterized in that: the insulation board (1) is located in the middle of the wall; the steel wire grid (5) consists of two pieces of steel wire mesh (5-1) and abdominal wire (5-2 ), wherein the steel wire mesh sheets (5-1) are located on both sides of the insulation board (1) and keep a certain distance from the insulation board (1), and the steel wire sheets (5-1) on both sides of the insulation board (1) pass through the abdominal wire (5-2) are connected together to form a steel wire grid (5), and the abdominal wire (5-2) obliquely passes through the insulation board (1); 4) There is a support pad (3) between the insulation board (1); the cast-in-place foam concrete (6) is poured between the non-demolition formwork (4) and the insulation board (1); the formwork tie rod (2) Through the non-demolition formwork (4) and the insulation board (1), the distance between the two sides of the non-demolition formwork can be adjusted by adjusting the length of the formwork tie rod (2). 2. The formwork-free sandwich foam concrete wall according to claim 1, characterized in that: the material of the formwork (4) without demolition is fiber-reinforced cement board or fiber-reinforced calcium silicate board. 3. The formwork-free sandwich foam concrete wall according to claim 1, characterized in that: the steel wire grid (5) is made of stainless steel, and the wire diameter of the steel wire mesh (5-1) is greater than 3mm. The mesh size of the steel mesh (5-1) is 50mm×50mm, the steel mesh (5-1) covers both sides of the insulation board (1), and the distance between the insulation board (1) and the insulation board (1) is not less than 20mm. 4. The formwork-free sandwich foam concrete wall according to claim 1, characterized in that: the arrangement shape of the support pads (3) is staggered and square, and the support pads (3) The size of the cross section is 50mm×50mm, the distance between the support pads (3) is 150-200mm, and the materials used are concrete pads, mortar pads, and plastic pads. 5. The formwork-free sandwich foam concrete wall according to claim 1, characterized in that: the cast-in-place foam concrete (6) is made of ordinary Portland cement, foaming agent, fly ash and Made of lightweight aggregate, the thermal conductivity is not more than 0.12W/(m·K). 6. The formwork-free sandwich foam concrete wall according to claim 1, characterized in that: the thermal insulation board (1) is a thermal insulation board with a thermal conductivity of less than 0.06W/(m·K), and the combustion Grade not lower than B2. 7. The formwork-free sandwich foam concrete wall according to claim 1, characterized in that: on the outside of the formwork (4), the formwork pull rod (2) passes through the formwork (4), and A grout stopper (7) is provided.