JPS6327661A - Heat insulating water proof fire retardant execution structure - Google Patents

Abstract

(57) [Abstract] 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, waterproof and non-combustible structure formed by constructing a wall or roof structure.

(Prior art) In general, when installing insulation on the roof and inside and outside walls of a building, a waterproof layer is generally applied over the insulation, especially when installing external insulation on the outside of the building, which is affected by rain, wind, and direct sunlight. The laminated construction method of insulation and waterproofing is commonly used. However, insulation materials (e.g. polystyrene, polyurethane, polyethylene, etc.) (thickness 20-50 mm) and waterproof materials (e.g. asphalt, rubber sheets, etc.) are organic and flammable, and must be protected with concrete or mortar. It won't happen. However, in buildings where weight reduction is desired, it is not desirable to use heavy concrete or mortar, and structurally speaking, concrete or mortar cannot be applied to the exterior walls of buildings.

For this reason, there are many internal insulation methods that involve pasting insulation material inside the building frame. However, this construction method tends to cause condensation between the back surface of the insulation material and the building frame when the inside and outside temperatures are significant.

This condensation causes the insulation material to float, or the insulation material absorbs the condensation, significantly impairing its insulation performance. Particularly in cold regions, there is a troublesome problem in that water that has condensed on the back side of the insulation material freezes, causing a frost column phenomenon. If the above-mentioned external insulation and waterproofing could be applied to the outside of the building, this would not happen, but this cannot be done without insulating and waterproofing combustible materials and covering them with fireproof materials.

(Problem to be solved by the invention) However, 4. However, in the above-mentioned external and internal insulation and waterproofing construction, it is necessary to protect the insulation and waterproofing materials installed on the building frame with concrete, etc., so the construction period is long, and the cost is high. Furthermore, since these construction materials are organic, they are heat resistant and produce toxic gases when burned. Furthermore, due to the difference in temperature inside and outside the building, dew condensation occurs between the insulation material and the building frame, reducing the lifespan of the insulation material and waterproofing material. Focusing on the problem, and as a result of numerous studies, we deposited a flame-retardant and waterproof construction material on top of the insulating material installed on the building frame, and created an insulated, waterproof, non-combustible structure that has waterproof and flame-retardant properties that do not cause frost pillars due to dew condensation. developed and arrived at the present invention.

The insulating waterproof/noncombustible construction structure of the present invention has a heat insulating layer (first layer) in contact with the building frame, a waterproof layer (second layer) in contact with this first layer, and waterproof property in contact with this second layer. It is characterized by being formed by depositing a flameproof waterproof layer (third layer) and a nonflammable polymer cement mortar layer (fourth layer) in contact with the third layer.

Next, the present invention will be specifically described with reference to the accompanying drawings.

In the present invention, a generally known heat insulating material such as hard urethane foam or phenol can be used to form the first heat insulating layer 1, and this heat insulating material is applied by spraying onto the surface of the frame 5. However, a heat insulating layer l having a thickness of about 10 to 5 Qmm can be provided. In this case, if it is desired to increase the compressive strength that can withstand the loading of heavy objects, suitable glass fibers can be mixed in when spraying the heat insulating material. By incorporating this glass fiber, the compressive strength can be increased and distortion caused by loading can be prevented. In addition to the above insulation materials, polyethylene, polypropylene,
When using a heat insulating board molded from a factory such as polystyrene, use an appropriate adhesive to attach the frame 5.
It can be attached to. A waterproof layer 2 is provided on the heat insulating layer 1 thus formed. This waterproof layer (second layer)
2, it is possible to use a rubber elastic resin cement waterproofing material (Japanese Patent Application No. 103814/1982) developed by the present applicant. A waterproof layer (second layer) can be formed by applying this waterproof material to a thickness of about 1 to 3 m. The performance of this waterproof layer (measured according to the JISA6021 standard) is shown in Table 1 below.

(Left below) Table 1 Rubber elastic resin cement performance test (JIS A6021 Roof waterproof coating material) Next, on top of the second waterproof layer 2, a flame retardant waterproofing agent to be described later was applied to
A flame-retardant waterproof layer 3 that passes the flame-retardant grade 1 of JIS A1322' (flame-retardant test method for thin materials for construction) is provided by applying the layer to a thickness of ~2 plates. The above-mentioned flameproofing and waterproofing agent used to form No. 39 was prepared by thoroughly mixing both A and B formulations having the components and blending ratios shown in Table 2 below using a suitable mixer. In this case, the same rubber elastic resin cement used to form the second layer was used as agent A.

Table 2 The above flameproof and waterproof layer was also tested for its physical properties. The results are shown in Table 3.

Further, the flame retardant properties of the above flame retardant waterproof layer 3 were tested and evaluated. The test was conducted using a Bunsen propane burner at 900~
Tested at 1000°C for 3 minutes (JIS-A-132
2 flame retardant test), passed the flame retardant grade.

As mentioned above, when the temperature of the flame-retardant waterproof layer of the present invention, which has passed the first grade flame retardant test, reaches 300°C or higher, the aluminum hydroxide, which is a component of compound B, causes dehydration and dilutes the ignition temperature, reducing the temperature of the lower waterproof layer. (Second layer) 2 and insulation layer (First layer) 1 to prevent abnormalities, and chlorinated paraffin and antimony trioxide, which are flame retardants, react at high temperatures and generate nonflammable gas. , the flame-retardant waterproof layer itself), the underlying waterproof layer and heat insulation layer. In addition, to impart fire resistance to this waterproof layer, for example, sludge light granules (calcined from sewage treatment in Tokyo), which are produced by high-heat firing of sludge generated during sewage treatment, may be mixed in. can. The waterproof layer thus formed adheres well to the fourth layer of non-combustible polymer cement mortar, making it possible to achieve an excellent laminated structure.

Next, a non-combustible polymer/cement mortar material is applied to the ± of the fireproof and waterproof layer (third layer) 3 deposited on the second layer as described above to a thickness of 2 to 20 mm (standard thickness of 3 to 5 rrrn). to provide a non-combustible polymer cement mortar layer 4. The above-mentioned nonflammable polymer cement mortar material was prepared by thoroughly mixing each component in the proportions shown in Table 4 below using a suitable mixer.

(Leaving space below) Table 4 Adding some synthetic resin emulsion for cement admixture to the above non-combustible polymer/cement/mortar material within the non-combustible material standards, for example, at a rate of about 2 to 5% as resin solid content, This is necessary in order to enhance the adhesion with the base flameproof waterproof layer 3 and provide waterproof properties. However, if the amount of this emulsion added exceeds the above-mentioned amount, the resin will not meet the non-flammability standards, but the resin will evaporate and molten glass will be generated in the non-flammable polymer cement mortar layer, making it undesirable. In addition, aluminum hydroxide, a component, dehydrates and decomposes at 350 to 450°C and serves to lower the back surface temperature. In addition, when the temperature becomes even higher, this aluminum hydroxide reacts with the calcium content of cement and becomes non-flammable and strong aluminum oxide/calcium oxide, which is the main component of cine mortar. Boric acid is 140-16
It turns into pyroboric acid at 0°C, becomes glassy, and turns into boric anhydride at high temperatures, increasing the flame resistance of the nonflammable cement/mortar layer 4. For this purpose, non-combustible cement
The mortar layer becomes an excellent noncombustible mortar that prevents cracking, melting, and penetration. This non-combustible mortar is heated to 900 to 100 with a Bunsen propane burner.
No abnormality occurred even when exposed to direct flame at 0°C for 30 minutes (passed the non-combustible base material test in Notification No. 1828 of the Ministry of Construction in 1972). On top of the heat insulating layer (first layer) L, a rubber elastic waterproof layer (second layer) 2, a flameproof waterproof layer (third layer) 3 and a non-combustible polymer/cement layer.
If the mortar layer (fourth layer) 4 is constructed with a heat insulating, waterproof and non-combustible structure using normal means with the thickness shown in Table 5, and the surface of this structure is heated to approximately 900 to 1000°C, the second, third and The backside temperatures of the four layers were measured and the state of each layer was observed. Table 5 shows the observation evaluation results.

Table 5 As is clear from Table 5 above, even when the outermost nonflammable polymer cement mortar layer (fourth layer) 4 is exposed to a high temperature flame (for example, 900 to 1000°C), it does not catch fire.
Moreover, even if the temperature on the back side of this layer rises to 350°C or higher, the lower flame-retardant waterproof layer (third layer) 3 immediately exerts its flame-retardant effect, and the underlying waterproof layer (second layer) 2 It can also be seen that the ignition temperature of the heat insulating layer (first layer) l can be suppressed and the heat insulating layer (first layer) l can be protected from combustion.

In the above, a laminated structure consisting of four layers has been described, but by using the above flameproof waterproof layer and/or noncombustible waterproof layer on the roof or wall without providing the above heat insulating layer, it is possible to It is possible to make the waterproof layer, which is mostly organic, completely nonflammable. Also, to increase the bending and tensile strength of the non-combustible structure of the present invention, reticulated metal mesh, glass or carbon fibers can be combined with or incorporated into the waterproofing or cement mortar layer.

(Effects of the Invention) As described above, the present invention provides a waterproof layer, a flameproof waterproof layer, and a nonflammable polymer/cement layer on the heat insulating layer provided in contact with the building frame.
By constructing a waterproof and non-combustible structure by laminating mortar layers, it is possible to obtain a heat-insulating structure with excellent waterproof and non-combustibility, and also to make the waterproof layer completely non-combustible.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional view of the insulating, waterproof and non-combustible construction structure of the present invention applied to a wall frame. 1...Insulating layer 2...Waterproof layer 3...Flameproof waterproof layer 4...Nonflammable polymer・Cement/Mortar layer 5・・・・・・・・・・・・・・・・・・・Structure patent applicant Kenji Nishiwaki, representative of Tosho Nishiwaki Co., Ltd.

Claims (1)

[Claims] A heat insulating layer (first layer) is provided in contact with the substrate, a waterproof layer (second layer) is provided in contact with this first layer, and a flameproof waterproof layer (third layer) having waterproof properties is provided in contact with this second layer. and a nonflammable polymer cement mortar layer (fourth layer) in contact with this third layer.
An insulating, waterproof and non-combustible construction structure characterized by being formed by depositing.