JPH0471802A - Thermal insulating plate serving as framework - 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 can be used as a formwork and can be effectively used for the interior and exterior of buildings. This relates to a heat insulating board that can also be used as a formwork.

[Problems to be solved by conventional techniques and inventions] Conventionally,
As a heat insulating board that can be used as a formwork for the interior and exterior of buildings, wooden plywood and foamed resin boards are assembled on site, or reinforcement disclosed in Japanese Patent Application Laid-Open No. 61/294048, etc. layer.

Heat insulating boards made of synthetic resin foam having a moisture-proof layer and a surface layer are known.

However, the former method of assembling wooden plywood and foamed resin boards on site requires complicated work during construction. Further, the latter heat insulating board cannot be manufactured at a low cost because three layers of surface material are laminated on the surface of one synthetic resin foam.

The present invention was made in order to solve the above-mentioned problems of wholesalers, and is an inexpensive formwork-use heat insulating material that is easy to work on-site, can withstand pressure during concrete pouring, has excellent flame retardancy, and has excellent flame retardancy. The purpose is to provide a board.

[Means to solve the problem]

In order to achieve the above object, the present invention has a nonflammable sheet material laminated on one or both sides of a foamed polystyrene plate via an inorganic silicate binder or impregnated with an inorganic silicate binder.

Here, as the above-mentioned inorganic silicate binder, one formed of an inorganic silicate foamed polymer has strength, weight reduction,
Preferable from the viewpoint of heat resistance, heat insulation, etc. In this case, this inorganic silicate foam polymer.

It can be obtained by foaming and curing an inorganic self-hardening composition containing a silicate or metasilicate as a main component and a surfactant.

In addition, the above-mentioned nonflammable sheet materials include polyester,
Nonwoven fabrics of polyethylene, polypropylene, vinylon, and glass fibers are preferably used.

[Effect]

The heat insulating board that can also be used as a formwork of the present invention has a foamed polystyrene board as a substrate, and a noncombustible sheet material is laminated thereon via an inorganic silicate binder or in a state impregnated with an inorganic silicate binder, thereby achieving high strength. In addition to being lightweight, it has excellent heat insulation properties, and since the foamed polystyrene board is protected by an inorganic silicate binder and a noncombustible sheet material, it has a high noncombustibility effect, and has good performance as the interior and exterior of buildings. It has the following. Moreover.

When used as a formwork, the inorganic silicate binder does not require complicated assembly on site, and has high strength and can sufficiently withstand pressure during concrete pouring.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings.

〔Example〕

FIG. 1 shows an embodiment of the heat insulating board that also serves as a formwork according to the present invention. 3 are laminated.

FIG. 2 shows another embodiment of the present invention, in which nonflammable sheet material layers 3, 3 impregnated with inorganic foams 2, 2 are laminated on both sides of a foamed polystyrene plate 1, respectively. This is a heat insulating board that doubles as formwork.

Here, the foamed polystyrene plate has a density of 0.02 to 0.0
6 g/am' is suitably used, and its thickness is usually 10 to 100 mm.

Moreover, as mentioned above, the inorganic silicate binder has a density of 0.3 to It is preferable to form Ig/Cm'.

To explain the above inorganic self-hardening composition in more detail, its composition is as follows (in addition, % indicates weight %)
.

Silicates 15-66%, more preferably 30-60% Kaolin 0-28%, more preferably 5-20% Water-soluble magnesium salts 2-20%, more preferably 0.2-0.8% Silifluoride Salt 2-2o%, more preferably 5-15% Metasilicate 3-58%, more preferably 3-30% Surfactant 0.1-28%, more preferably 0.1-2% O-15
%, more preferably 5 to 13% In this case, the silicate is sodium silicate, the water-soluble magnesium salt is magnesium chloride, the silicofluoride salt is sodium silicofluoride, the metasilicate is sodium metasilicate, surface active As the agent, anionic surfactants such as sodium lauryl sulfate are preferably used. Note that, if necessary, an inorganic or organic filler may be added to the above composition.

Furthermore, non-woven fabrics such as polyester, polypropylene, vinylon, and glass fiber are preferably used as the non-flammable sheet material, and non-woven fabrics having a basis weight of 20 to 500 g/am2 are particularly suitable.

The thickness of the inorganic silicate binder is 200 to 2000 g/cm as the coating amount of the inorganic self-hardening composition, whether it is impregnated into the nonflammable sheet material or not.
It is preferable that

Moreover, it is suitable that the thickness of the noncombustible sheet material is 0.1 to 5 mm.

To obtain the heat insulating board shown in Figure 1 above, the inorganic self-hardening composition is applied onto a foamed polystyrene board, a nonflammable sheet material is placed on top of the inorganic self-hardening composition, and the inorganic self-hardening composition is foamed and hardened. At this time, a noncombustible sheet material is adhered to an inorganic foam obtained by foaming and curing an inorganic self-hardening composition. In addition, when obtaining the heat insulating board shown in Fig. 2, a noncombustible sheet material is placed on a foamed polystyrene board, and an inorganic self-hardening composition is applied thereto to impregnate the noncombustible sheet material. The composition is foamed and cured.

The heat insulating board thus obtained is used as a heat insulating board for formwork for the interior and exterior of buildings, etc. In this case, concrete is poured using a layer of noncombustible sheet material as the surface of the formwork. be. Note that a known method can be adopted as a method for pouring concrete using this heat insulating board as a formwork.

The structure of the heat insulating board of the present invention is not limited to that shown in FIGS. As shown in the figure, the entire or part of the noncombustible sheet material may be impregnated with an inorganic silicate binder, and other configurations may be modified within the scope of the present invention.

Next, an experimental example will be shown.

[Experiment example]

An inorganic silicate binder (density 0.9 g/am3) having the following composition was applied to both sides of a 25 mm thick expanded polystyrene plate.
Each was coated to a thickness of 1.0 mm, and glass paper of 30 g/m2 was attached thereon to produce a heat insulating board that also served as a formwork.

Can Silicon Salt Binder composition Sodium silicate 45% Kaolin
10 Magnesium chloride 0.5 Sodium silicate 15 Sodium metasilicate 20 Surfactant 1.5 total
'100.0% This heat insulating board that also serves as formwork has a bending strength of 10 kg/cm2 and can withstand the pressure of concrete pouring, and will not be damaged even if it is directly exposed to the flame of a torch lamp. There was no.

The bending strength of the foamed polystyrene plate with a thickness of 25 mm used in this example is 3.7 kg/cm2, and therefore, by forming glass paper layers on both sides of the plate through an inorganic binder, the bending strength is significantly increased. It is recognized that this has been done.

〔Effect of the invention〕

As explained above, the formwork-cum-insulating board of the present invention is suitably used for the interior and exterior of buildings, has excellent heat insulation, fire resistance, and strength, and is easy to work with when used as formwork. It can withstand concrete pouring pressure sufficiently, has excellent performance as a formwork, and can be manufactured at low cost.

[Brief explanation of the drawing]

1 to 3 are cross-sectional views showing embodiments of the present invention, respectively. 1... Polystyrene foam plate, 2... Inorganic foam,
3...Nonflammable sheet material Figure 1 Figure 3

Claims (1)

[Scope of Claims] 1. A heat insulating board that also serves as a formwork, characterized in that a noncombustible sheet material is laminated on one or both sides of a foamed polystyrene board via an inorganic silicate binder. 2. A heat insulating board that can also be used as a formwork, characterized in that a noncombustible sheet material impregnated with an inorganic silicate binder is laminated on one or both sides of a foamed polystyrene board.