JPS63161241A - Heat insulating board also used mold frame and concrete casting mold frame panel structure using said board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a heat insulating board that also serves as a formwork and a concrete pouring formwork panel structure using the board. In this process, a heat insulating board is installed to double as a formwork, and as the concrete hardens after concrete pouring, the heat insulating board is bonded to form a heat insulating board that doubles as a formwork (hereinafter simply referred to as The present invention relates to a concrete pouring form panel structure (hereinafter sometimes simply referred to as a panel structure) that uses the heat insulating board as at least one formwork of a concrete pouring form.

(Conventional technology) In the past, insulating concrete walls has been widely and commonly performed to save energy in buildings. J
-) In (SRC) construction, synthetic resin foam is widely used as a heat insulating board in such heat insulation construction because of its heat insulating properties and hygroscopic properties.

In construction in this case, from the viewpoint of cost or shortening the construction period, double-sided paper-coated insulation boards or synthetic resin foam boards are fixed by nailing them to the inside of the concrete pouring formwork that forms the concrete wall. The common method is to pour concrete, then bond an insulating board or foam board to the concrete as it hardens, and then remove the formwork.

This is because the heat insulating board or foam board to be bonded to the concrete is weak in strength and cannot withstand the lateral pressure during concrete pouring, resulting in the complexity of having to install a concrete formwork separately. In addition, there is a risk that the board or form board may become deformed due to moisture absorption from the poured concrete or temperature changes, and if the nailing between the concrete and the formwork is insufficient, gaps may occur between the formwork. However, the glue gets wrapped around the surface of the board, etc., and as a result, the contact area between the board or form board and the formwork is filled with concrete, causing heat bridges, cold bridges, etc., and problems with the insulation performance of the building. was there.

On the other hand, as a solution to these problems, an insulating board has been proposed in which a hard surface material that can withstand the lateral pressure during concrete pouring is attached to the surface of the insulating board.

This type of insulation board is quite effective in shortening the construction period because the board itself constitutes the formwork of the concrete pouring formwork, and the hard surface material attached to the surface of the insulation board also serves as the interior base. It was also a highly efficient construction.

(Problem to be solved by the invention) However, in this insulation board, the insulation board is not a strong member like, for example, a soft foam, but in order to be used as a formwork, it is necessary to withstand the lateral pressure during concrete pouring. A high-strength hard plate had to be attached to the surface, and since it was to be used outdoors, a high-quality material with excellent dimensional stability was required to withstand changes in the natural environment such as rain or direct sunlight. It is.

Therefore, insulating boards with excellent strength and excellent dimensional stability would be expensive, making it impossible to select an arbitrary interior base board that matches the usage characteristics of the building, and making it difficult to use at specific construction sites. It was only possible to use this method, and it was unsuitable for general insulation frame construction. Furthermore, since the hard plate attached to the surface of the heat insulating board acts as the interior base after concrete is poured, consideration must be given to the surface smoothness during formwork assembly and the prevention of bulges due to concrete pouring.
As a result, there was a problem in that a special construction system was required, which conversely led to an increase in costs.

In addition, missing parts of the insulation board, such as separator through holes,
It required a great deal of effort to dispose of damaged parts that occur during construction, and it was not necessarily an efficient construction method, and it had various problems.

Therefore, the present inventors conducted studies to solve the above-mentioned problems and propose an insulating board that would be an effective formwork for concrete pouring.As a result, the inventors found that the bending rigidity was 7.5
csl (1m width), local compressive elastic modulus is 40Y
The inventors have discovered that a heat insulating board having a ratio of 4/α or more can be used as a very good concrete pouring formwork and can also be used as a simple heat insulating structure, and have completed the present invention.

(Means for Solving the Problems) A first aspect of the present invention provides a soft face material having at least a three-layer structure consisting of a reinforcing layer, a moisture-proof layer, and an adhesive layer in order from the heat-insulating layer on at least one side of the heat-insulating layer; Or, if the adhesive layer has excellent strength and dimensional stability, in a heat insulating board to which a soft facing material having at least one layer of adhesive layer that also serves as a reinforcing layer is attached, the bending rigidity of the board is 75× 10'
14cd (1m width), local compressive elastic modulus is 40
The present invention relates to a formwork-cum-insulating board characterized by having Kp/cs+ or more.

Further, the second invention of the present invention relates to a concrete pouring formwork panel structure using a heat insulating board, in which two formworks installed side by side facing each other are fixed with a temporary reinforcing material, or the formwork is fixed below the concrete pouring surface. In a concrete pouring panel structure in which a formwork is fixed with temporary reinforcing material to form a concrete pouring space, at least one side of the heat insulating layer has at least a three-layer structure consisting of a reinforcing layer, a moisture barrier layer, and an adhesive layer in order from the heat insulating layer. It is made by pasting a soft facing material having at least one layer structure of a soft facing material or an adhesive layer that also serves as a reinforcing layer, and has a bending rigidity of Z5 x 10'Kpcd (1 m width) and a local compressive elastic modulus of 40. The present invention relates to a concrete pouring panel structure characterized in that a formwork-cum-insulating board having the following characteristics is used for at least one formwork or a lower formwork.

The heat insulating board that can also be used as a formwork of the present invention has a soft facing material attached to at least one surface of the heat insulating layer, and has a bending resistance of 7.5 x 10 Kgm (1 m width) or more. and its local compressive elastic modulus is 40 Q /cx
It is necessary to have the above. If the bending stiffness and local compressive elastic deformation coefficient are less than these values, the insulation board will be significantly bent due to the concrete side pressure during concrete pouring, resulting in significant local compressive deformation and, in some cases, damage and destruction of the board. , the insulation board cannot be applied as concrete pouring formwork.

The deformation of formwork panels caused by concrete lateral pressure during concrete pouring can be divided into local compressive deformation of the temporary reinforcement support and deflection due to bending stress in the middle of the panel.

In the case of general veneer formwork, the temporary reinforcing material support part has a bearing pressure strength of more than soq/cd, and the local compressive deformation of the support part can be almost ignored. It is only necessary to consider the deflection due to bending stress in the part. but,
From the standpoint of heat insulation, insulation boards are generally made mostly of synthetic resin foam or porous materials in which fibers such as rock wool and glass wool are intertwined, and their bearing strength is low, making them susceptible to bending. In addition, local compressive deformation of the support portion occurs. For strength calculations, formwork panels can be treated as intermediate between a simple beam and a beam fixed at both ends, that is, as a continuous beam. Therefore, the deflection of the panel is about 4 times that of a simple beam, and the stress is about 4 times that of a simple beam. This will result in a decrease to

For this reason, the support interval of the temporary reinforcing material should be set to 200 mr, for example.
When the spacing is short, around n, the deflection due to bending stress becomes small, and local compressive deformation becomes an important factor.

The inventor has determined that the bending stiffness of the insulation board is set to a constant value, that is, l
5 x 10' Y41cd (1m: island) or more, and in order to keep the local compressive deformation small, the local compressive elastic deformation coefficient is set to 40 to 5+/aa or more, so that the spacing of the temporary reinforcing materials (butter etc.) is kept at a constant value. It has been confirmed through various experiments that the insulation board can be used as concrete pouring formwork if the following conditions are met.

7.5 x 10'd or more bending rigidity and a local compressive elastic modulus of 40 or more This is possible by selecting and combining materials, strength, etc.

As the heat insulating layer used in the present invention, for example, hard urethane 7
Examples include ohm, styrene foam, phenol 7 ohm, innurate foam, and ebokki 7 foam.

In addition, the soft facing material used in the present invention has at least a six-layer structure consisting of a reinforcing layer, a moisture-proof layer, and an adhesive layer in order from the heat insulating layer, or has at least one layer structure of an adhesive layer that also serves as a reinforcing layer. be.

In the heat insulation board of the present invention, the reinforcing layer bears the tensile and compressive stresses generated on the front and back surfaces of the board due to concrete lateral pressure during concrete pouring, and also disperses the local compressive stress of the temporary reinforcement support over the area of the contact area to prevent local deformation. Furthermore, it is designed to ensure dimensional stability against natural environmental changes such as rain and direct sunlight during the process from assembling the formwork to pouring concrete. This reinforcing layer is therefore based on water-resistant liners, water-resistant kraft, aluminum foil, iron foil, polyester non-woven fabrics and films, asbestos paper, charcoal paper (calcium carbonate and pulp, glass mixed paper), glass non-woven fabrics and aluminum hydroxide. It is preferable to use at least one type of nonwoven fabric selected from the group consisting of nonwoven fabrics.

A moisture barrier layer prevents the influence of moisture due to changes in the natural environment on the reinforcing layer and insulation layer, in other words, it ensures dimensional stability, prevents moisture from moving into the insulation layer, and improves its insulation performance. It is for guarantee purposes. Therefore, this moisture-proof layer is preferably composed of at least one material selected from the group consisting of polyethylene and polypropylene.

The adhesive layer is for firmly adhering to concrete as it hardens after concrete is poured. Therefore, this adhesive layer can be made of polyester nonwoven fabric, asbestos paper,
At least one selected from the group consisting of charcoal paper, glass nonwoven fabric, and aluminum hydroxide-based nonwoven fabric
Preferably, it consists of seeds.

A soft facing material made from a combination of these may have at least a three-layer structure consisting of a reinforcing layer, a moisture-proofing layer, and an adhesive layer in order from the heat-insulating layer. It is also possible to have a laminated structure of four or more layers.

In addition, if the adhesive layer itself can ensure high bending rigidity and local compressive strength, and has excellent water resistance and dimensional stability without deteriorating due to changes in the natural environment, the adhesive layer can be used as a reinforcing material, and may be a single adhesive layer or a structure in which a moisture-proof layer and a heat-insulating layer are laminated together. That is, the soft facing material of the present invention is
It may have a structure of at least one adhesive layer that also serves as a reinforcing layer. This adhesive layer that also serves as a reinforcing layer is preferably composed of at least one material selected from the group consisting of polyester nonwoven fabric, asbestos paper, charcoal paper, glass nonwoven fabric, and nonwoven fabric based on aluminum hydroxide. .

In addition, if the heat insulating layer has excellent adhesion to concrete, is difficult to absorb moisture, has excellent water resistance, and has excellent dimensional stability, the contact surface of the temporary reinforcing material on the opposite side to the concrete adhesion surface. A soft surface material may be provided only on the surface. In short, even when the insulating board for formwork and formwork of the present invention has a two-layer structure of a heat insulating layer and a soft surface material, the bending rigidity and local compressive elastic modulus are 7.5 Kg x 10'Y.
It is sufficient that the material has a value of 4cd or more and 4o or more, and a combination of a heat insulating material and a soft surface material may be used in accordance with these physical property values.

The insulation board of the present invention constructed as described above can be used as a formwork only below the concrete pouring surface for slabs, and as a formwork for beams, columns, and walls in place of conventional panel formwork. The insulation board of the present invention can be used as it is as a formwork for at least one of two formworks installed in parallel.
It is fixed with supports, etc., and a concrete pouring space is formed.

In the conventional method of temporarily fixing the insulation material to the inside of the panel with nails, it is not possible to check the butt between the formwork joint and the insulation material, which tends to leave a large gap between the formwork and the insulation material. This caused heat bridges, cold bridges, etc., and insulation defects to occur all over the place, resulting in nothing more than a crappy insulation construction. On the other hand, the conch IJ-
In the cast-in formwork panel structure, the surface material of the insulation board used is a lightweight, long, and wide soft surface material, so there are fewer insulation joints and board joints can be completely controlled. This enables ideal insulation construction.

(Example) The present invention will be explained in detail below with reference to Examples.

FIG. 1 is a sectional view of an embodiment of the heat insulating board of the present invention.

That is, in the heat insulating board 1 of this embodiment, a hard urethane foam with a density of 60% and a thickness of 15 mm is used as the heat insulating layer 2, and soft facing materials 6.6 are attached to both the front and back surfaces of the heat increasing layer 2. Ru. The soft facing material 6 includes, in order from the heat insulating layer 2, a moisture-proof layer 4 made of polyethylene, a reinforcing layer 5 made of a waterproof liner. It is a laminate with a four-layer structure consisting of a moisture-proof layer 4 of polyethylene and an adhesive layer 6 of charcoal paper, and the tensile strength at 1 inch elongation is 7Q/1.
It has a performance of 5c*width.

This insulation board 1 was subjected to a bending test and a local compression test in the following manner, and the bending rigidity value and local compression deformation coefficient were determined, respectively.

Bending test According to JISA-1414, as shown in Figure 2,
A 2-wire concentrated bending test is performed using a coated body (insulation board) of 400'ml/interval! = 400mm, distance b between pressure rows 27, 7, 200mm and load speed 1
The test was carried out at a speed of 0 m/min, and the relationship between the load and the amount of deflection was measured using an automatic recorder.

The bending stiffness EI is given by the following formula.

δ = Maximum deflection at the center (=) p = Load (mark) Ei = Bending stiffness (immediately CD) When the bending stiffness was determined from the graph measured by the recorder, EI=! It was calculated as l x 10'Kgd.

That is, when converted to a width of 1 m, the heat insulation board of the example has a width of 7.5 x 10'Kpcsf.

Based on the actual construction method of temporary reinforcement materials, JISA9514
In accordance with the above, as shown in Fig. 3, the test specimen (insulation board) was placed on the temporary reinforcing material 8 made of round butter (diameter 4 FL 6 mg) and pressurized via the pressure plate 9 to reduce the pressure load and deformation. Measure the relationship between amounts using an automatic recorder.

The local compressive elasticity coefficient Ec is given by the following equation.

t.

p=load (immediately)! = receiving pressure length -) Δp/Δt = slope of the straight part of the load strain curve Kg/exto
= Thickness of test piece) Ec = Local compressive elastic modulus F4/1 When the local compressive elastic modulus Ec was determined from the measurement chart of the recorder, Ec = 4ob/α was obtained.

The insulation board of the above example was used as the actual concrete pouring formwork and fixed with temporary reinforcing material of round butter to form the concrete pouring form panel structure of the example, and a concrete pouring test was conducted under the following conditions. As a result, the maximum amount of deformation was found to be 4.1 degrees.

Placing conditions ■ Concrete Maximum diameter of coarse aggregate 20 degrees Slump 21α ■ Placing speed 20.7 m 1 hour ■ Concrete thickness 150 mm ■ Vertical and horizontal reinforcing bars 200 mm pitch, double reinforcement 1φ ■ Concrete pouring height 2. ．． 7m〃 Bone length
4.5m ■Maximum lateral pressure 2685Kg/measured with an earth pressure meter (Tokyo Sokki [KD-2 type)] Temporary reinforcing material support conditions ■Bata material Round Bata φ4 a 6 im nokuib■
Therefore, the insulation board of the example is a good-looking insulation board that can be used as a formwork, with excellent strength and dimensional stability, and is very effective as a formwork for a concrete pouring formwork channel structure. I found out something. Needless to say, the above board exhibits a good heat insulating effect.

(Effect of the invention) As described above, the insulation board of the present invention is made of RC,
In pouring concrete for SNC construction, it is possible to pour concrete without using any extra formwork, and it can also be used as a formwork, and since its surface is a soft surface material, it has a hollow point that can be directly laminated. It is something.

Furthermore, it can be cut and manufactured to any size to suit the building on site, and can be provided at low cost.

In addition, since it is possible to make long and wide boards, the number of joints in the insulation board can be reduced, the occurrence of sagging can be eliminated, and the insulation performance of the building can be improved, reducing the cost of formwork, disassembly, transportation, etc. will improve.

Therefore, the concrete pouring formwork panel structure of the present invention using this insulation board is suitable for formwork assembly, concrete
1. Construction can be significantly simplified and construction costs can be significantly reduced in each process of driving and subsequent dismantling, and this is of great significance in these respects.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a heat insulating board that also serves as a formwork according to an embodiment of the present invention, FIG. 2 is a view showing a bending test method, and FIG. 6 is a view showing a local compression test method. In the figure, 1...Insulation board for formwork 2...Insulation layer 6...Soft surface material 4...Moisture-proof layer 5...Reinforcement layer 6...Touching layer 7d layer Fig. 1-- Insulation board for formwork 2 Insulation layer 3 Soft facing material 4, moisture-proof layer 5 - reinforcing layer 6 - adhesive layer Figure 2 Figure 3 Concrete pouring formwork panel structure 3 using procedure amendment document Relationship of patent applicant address: 5th name (00
7) Achilles Co., Ltd. 5. Date of amendment order: “Voluntary” 7. Contents of amendment (1) “D-φ” on page 20, line 15 of the F3A specification is corrected to “D-φ13.” (2) "KD-2 type" on page 20, line 19 of the specification is corrected to "KD-2D type".

Claims (10)

[Claims] (1) A soft facing material having at least a five-layer structure consisting of a reinforcing layer, a moisture-proof layer, and an adhesive layer in order from the insulating layer, or a soft facing material having at least one layer structure of an adhesive layer that also serves as a reinforcing layer, on at least one side of the heat insulating layer. The bending rigidity of the board is 7.5×10^4kgcm^2 (1
m width) or more, and has a local compressive elastic modulus of 40 kg/cm
A formwork-cum-insulation board characterized by having the above. (2) At least the reinforcing layer is selected from the group consisting of waterproof liner, waterproof kraft, aluminum foil, iron foil, polyester nonwoven fabric and film, asbestos paper, charcoal paper, glass nonwoven fabric, and aluminum hydroxide-based nonwoven fabric. The board according to claim 1, characterized in that it is composed of one type of board. (3) The board according to claim 1, wherein the moisture-proof layer is made of at least one material selected from the group consisting of polyethylene and polypropylene. (4) A patent characterized in that the adhesive layer is composed of at least one material selected from the group consisting of polyester nonwoven fabric, asbestos paper, charcoal paper, glass nonwoven fabric, and nonwoven fabric based on aluminum hydroxide. A board according to claim 1. (5) The adhesive layer that also serves as a reinforcing layer is made of at least one material selected from the group consisting of polyester nonwoven fabric, asbestos paper, charcoal paper, glass nonwoven fabric, and nonwoven fabric based on aluminum hydroxide. A board according to claim 1, characterized in: (6) In a concrete pouring panel structure in which two formworks installed side by side facing each other are fixed with temporary reinforcing materials, or the formwork is fixed with temporary reinforcing materials only below the concrete pouring surface to form a concrete pouring space. At least one side of the heat insulating layer is pasted with a soft face material having at least a three-layer structure consisting of a reinforcing layer, a moisture-proof layer, and an adhesive layer sequentially from the heat insulating layer, or a soft face material having at least one layer structure of an adhesive layer that also serves as a reinforcing layer. The bending rigidity is 7.5×10^4kgc.
m^2 (1m width) or more, with a local compressive elastic modulus of 40
A concrete pouring formwork panel structure characterized in that a formwork-cum-insulating board having a capacity of at least 1 kg/cm is used for at least one formwork or a lower formwork. (7) At least the reinforcing layer is selected from the group consisting of waterproof liner, waterproof kraft, aluminum foil, iron foil, polyester nonwoven fabric and film, asbestos paper, charcoal paper, glass nonwoven fabric, and aluminum hydroxide-based nonwoven fabric. The panel structure according to claim 6, characterized in that it is composed of one type of panel structure. (8) The panel structure according to claim 6, wherein the moisture-proof layer is made of at least one material selected from the group consisting of polyethylene and polypropylene. (9) A patent characterized in that the adhesive layer is composed of at least one material selected from the group consisting of polyester nonwoven fabric, asbestos paper, charcoal paper, glass nonwoven fabric, and nonwoven fabric based on aluminum hydroxide. A panel structure according to claim 6. (10) The adhesive layer that also serves as a reinforcing layer is made of at least one material selected from the group consisting of polyester nonwoven fabric, asbestos paper, charcoal paper, glass nonwoven fabric, and nonwoven fabric based on aluminum hydroxide. A panel structure according to claim 6 characterized by: