JP2567021B2 - Construction method of the outer insulation wall of the structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for constructing an outer heat insulating wall for insulating a structure such as a building from the outside.

(Prior Art) Conventionally, there are a dry construction method and a wet construction method as a construction method of an outer heat insulating wall for insulating the outside of a structure such as a concrete structure. Among them, in the wet method, as shown in FIG. 4, the adhesive mortar 2 is lumped and dispersed on the surface of the concrete skeleton 1 of the construction, and the heat insulation made of resin foam such as expanded polystyrene and urethane foam is placed on this. The material 3 is pressed and adhered. An adjustment layer 4 for the purpose of adhesion is applied to the surface of the heat insulating material 3, and a cement mortar 5 which is a finishing layer is applied on the adjustment layer 4 for finishing.

However, in this method, the adhesive force of the adjustment layer 4 is reduced due to the stress caused by the shrinkage of the cement mortar 5 and the difference in the thermal expansion coefficient between the heat insulating material 3 and the cement mortar 5, and the cement mortar 5 as the finishing layer is cracked. Enter
It peels off, resulting in a decrease in heat insulation efficiency.

Therefore, as an improved construction method to solve this problem,
The method shown in the fifth illustration was considered. This method is the same as the above method until the adjustment layer 4 is applied, but after that, before applying the cement mortar 5, the anchor bolts 6 having a mesh 7 such as glass mesh are heat-insulated at various points on the surface. It penetrates through the material 3 and is driven into the concrete skeleton 1. After this, the cement mortar 5 is formed by raising the mesh 7.
Is applied to completely embed the mesh 7 inside the cement mortar 5 to form a finished surface.

Although this method is less likely to cause peeling of the surface layer as compared with the above-mentioned wet method, further improvement is desired in terms of heat insulation efficiency.

That is, according to the fireproof performance test related to the outer insulation wall construction method under the provisions of the Ministry of Construction, Sumitomo No. 510 in 1985, the conventional method
It has fire resistance only for about 40 minutes.

(Problems to be achieved by the invention) The heat insulation wall obtained by the improved construction method described above has a heat insulation performance that sufficiently passes the heating time of 30 minutes in the fire protection performance test according to No. 510 of 1985. Yes, but heating time 60
Minutes are not sufficient for the ability to hold up.

It is an object of the present invention to provide a method for constructing an outer heat insulating wall having heat insulating performance that passes the above-mentioned new fireproof performance test.

(Means for Achieving the Object) In order to achieve the above-mentioned object, after the heat insulating material 3 made of a resin foam is adhered to the outer wall of the concrete skeleton 1 of the structure with the adhesive mortar 2, the heat insulating material 3 is attached to the outside of the heat insulating material 3. A resin cement mortar 10 is applied, a lightweight mortar 11 containing a refractory inorganic lightweight body particle is applied to the outside of the resin cement mortar 10, and a decorative material 12 is applied to the outside of the resin cement mortar 10 on the outside of the lightweight mortar 11. Is to be applied.

The lightweight mortar 11 has a composition of 35% by weight of cement, 5 to 20% by weight of refractory inorganic lightweight particles, and 60 to 40% by weight of sand, and has a specific gravity of 0.8 when hardened by adding water thereto.
~ 1.2 is something.

(Function) The outer heat insulating wall constructed by the method of the present invention can sufficiently withstand heating for 60 minutes, which is a new fireproof performance test, by using a lightweight mortar using a fireproof material.

As the refractory inorganic lightweight particles, perlite, vermiculite, pumice, etc. having a specific gravity of 0.02 to 0.25 and a particle size of 1 to 15 mm can be used.

If necessary, a thickener such as methyl cellulose or polyvinyl alcohol may be added in an amount of 0.05 to 2% by weight, and a reinforcing material such as glass fiber or nylon fiber may be added in an amount of 2 to 15% by weight.

(Example) FIG. 1 is a cross-sectional view of an outer heat insulating wall constructed by the method of the present invention, (a) is a vertical cross-sectional view of a window portion, and (b) is A of (a).
It is an expanded sectional view of a part. Adhesive mortar 2 is distributed and arranged on the outer surface of a concrete skeleton 1 with a specific gravity of 2.24 and a wall thickness of 20 to 100 m.
The heat insulating material 3 of m is attached, and the exterior material 9 is attached to the outer surface of the heat insulating material 3.
To provide. In order to form the exterior material 9, first, resin cement mortar 10 is added in order to increase the adhesive strength with the next layer.
Apply to a thickness of 1 mm. Approximately 10 lightweight mortars 11 containing refractory inorganic lightweight body particles are provided on the outer surface of this resin cement mortar 10.
mm to a thickness of about 1 mm, and the outer surface of the resin cement mortar 10 is applied again to a thickness of about 1 mm.
As the acrylic coating, inorganic coating and other general exterior coatings are applied.

The light mortar 11 may be applied twice by the above-mentioned method, and a coarse alkali-resistant glass fiber cloth 13 may be applied in the middle to prevent cracks.

In this embodiment, the following materials were used as the lightweight mortar 11. Its composition is cement 35.0% by weight pearlite 15.0% by weight (particle size 1-2.5 mm specific gravity 0.16-0.25) sand 46.9% by weight methyl cellulose 0.1% by weight glass fiber 3.0% by weight (alkali resistant glass fiber chopped strands filament diameter: 13 μm convergence number : 160 pieces Length: 13mm) Specific gravity is 1.01.

As the heat insulating material 3, a polystyrene foam plate with a specific gravity of 0.018 is used.
A 00 mm thick plate was used.

Next, the fireproof performance test of the two heat insulating walls A and B constructed in the above example will be described.

The test method is based on the fireproof performance test method related to the external insulation method specified in Ministry of Construction, Sumisho No. 510, 1985.

The test pieces and the heating test results are as shown in Tables 1 and 2.

The test results are shown in the graph of FIG. 3 showing changes in the average temperature of each part.

The heating test was completed 60 minutes after the start of heating, and the situation after that is as follows.

1) Specimen symbol A Heating side [immediately after the end of heating] ・ Around the lower part of the exterior material and around the opening with a heat insulating material
Afterflame with a length of 30 cm [De-furnace of test specimen: 30 minutes after heating] -Afterflame at the bottom of the exterior material up to 84 minutes after completion of heating-Partial drop of the surface layer at 4 locations on the exterior material and 5 The surface layer floats up at the location. ・ The heat insulating material is completely burned down. The back side does not change. 2) Specimen symbol B heating side [immediately after heating] ・ Same as in the case of A above. ] Afterflame at the bottom of the exterior material for up to 95 minutes after heating is completed.-Partial surface layer drop off at several locations of the exterior material and surface surface lift up at 5 to 6 locations.-Insulation material is completely burned. None (curing of the invention) As can be seen from the above test results, there is no particular change on the back side after 60 minutes of heating from the outside, so
There is no problem even in the new fire protection performance test for 60 minutes, and it can be used as a practically sufficient fire wall.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a construction example of the present invention, (a) is a heat insulating view of a window portion, (b) is an enlarged cross-sectional view of an A portion of (a), and FIG. 2 is a fire performance test of an outer heat insulating method. FIG. 4 is a cross-sectional view of the test body of FIG.
FIG. 5 is a sectional view of an example of construction by the conventional wet construction method, and FIG. 5 is a sectional view of an example of construction by the conventional dry construction method. 1: Concrete frame, 2: Adhesive mortar, 3: Insulation, 10:
Resin cement mortar, 11: Lightweight mortar, 12: Decorative material.

Claims (2)

(57) [Claims] 1. A heat-insulating material made of a resin foam is adhered to an outer wall of a concrete skeleton of a structure with an adhesive mortar, and a resin cement mortar is applied to the outer side of the heat insulating material, and a fire-resistant inorganic material is applied to the outer side of the resin cement mortar. Construction of the outer insulation wall of the structure, characterized in that a lightweight mortar containing lightweight body particles is applied, the resin cement mortar is applied again on the outside of the lightweight mortar, and a decorative material is applied on the outside of the resin cement mortar. Method. 2. The lightweight mortar has a composition of 35% by weight of cement, 5 to 20% by weight of refractory inorganic lightweight particles, and 60 to 40% by weight of sand, and has a specific gravity of 0.8 to 1.2. The method for constructing the outer heat insulation wall of the described structure.