JP2910820B2 - Hybrid fire-resistant coating structure and fire-resistant coating method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hybrid fire-resistant coating structure capable of remarkably improving fire resistance performance and a fire-resistant coating method.

[0002]

2. Description of the Related Art Hitherto, as a refractory structure such as a steel structure, a structure in which a surface of a steel frame or the like is covered with a non-foamable refractory coating material such as a lightweight mortar is known. Separately, there is known a structure in which a surface of a steel frame or the like is covered with a foaming refractory paint that foams in a fire to form a heat insulating layer.

[0003] In order to maintain the fire resistance of buildings such as steel structures at a certain level, certain standards are set by the Building Standards Law. In other words, in accordance with the Building Standards Law, to prevent a building from collapsing in the event of a fire, the necessary structure for pillars, beams, walls, floors, and roofs according to the scale, number of floors, use, and regional characteristics Fire resistance is determined.

[0004] Specifically, there are the following provisions for designating a conventional refractory structure. General designation; refractory structures described in Ministry of Construction Notification No. 1675 Nos. 1 to 5 such as reinforced concrete structures, steel reinforced concrete structures, steel mesh mortar-coated steel frame structures, and steel mesh pearlite mortar-coated steel frame structures.

General specification: sprayed rock wool coated steel structure, fiber-mixed calcium silicate coated steel structure, asbestos / rock wool plate coated steel structure, hollow prestressed concrete panel floor plate structure, concrete deck plate composite slab structure, sprayed rock wool coating Fire resistant structure specified by general rules, such as a zinc-plated roof structure.

Individually specified; wet-sprayed rock wool-coated steel frame structure, vermiculite plaster-coated steel frame fire-resistant structure, aluminum hydroxide / cement-based spray material-coated steel frame fire-resistant structure, concrete-filled steel pipe fire-resistant structure, asbestos cement extruded plate-coated steel frame fire-resistant structure , ALC plate coated steel frame refractory structure,
Wet gypsum spraying material coated steel frame fireproof structure, asbestos cement extruded plate partition wall fireproof structure, double-sided inorganic fiber reinforced gypsum board laminated lightweight steel base partition wall fireproof structure, double-sided cement mortar with three-dimensional wire mesh foamed polyethylene foam filled outer wall fireproof Structure, fireproof structure of perforated iron mesh mortar board outer wall, double-sided welded wire mesh cement mortar expanded polystyrene board filled fireproof structure, ALC floor board fireproof structure, wet sprayed vermiculite coated deck plate concrete floor fireproof structure, wet sprayed rock wool coated concrete deck Plate floor fireproof structure, zinc iron sheet perlite sprayed fired roof structure, cellulosic fiber sprayed zinc iron sheet fired roof structure, wet gypsum sprayed metal metal sheet fireproof structure, etc.

[0007] Article 38 of the Building Standards Law; rock wool thin-coated FR steel refractory structure, aluminum hydroxide / cement-based spraying material-coated FR steel refractory structure, foamed refractory paint-coated steel frame refractory structure, etc. Further, in order to specify the degree of fire resistance performance of these fire-resistant structures in the event of an actual fire, a fire test and the like are specified in Notification No. 2999 of the Ministry of Construction.

[0008] In this test method, a test specimen of a predetermined standard is heated under a heating condition such as a predetermined heating time and a predetermined heating temperature. In this test, those having no problems such as cracks or dropouts in the refractory structure of the test piece (or within the allowable range) are classified according to the test time, and are refractory for one hour and two hours. , 3 hours fire resistance, etc.

[0009]

However, the above-mentioned refractory structures have advantages and disadvantages, and further improvement has been desired. For example, when a structural steel frame is coated with dry rock wool, which is a non-foaming fire-resistant coating material, it is necessary to use a fire resistance test specified in Ministry of Construction Notification No. 2999 for one hour,
To get fire resistance for 2 hours and 3 hours,
There is a problem that a 45 mm thick and 60 mm thick dry rock wool coating is required, and the coating must be considerably thick in order to obtain sufficient fire resistance.

[0010] This is not limited to dry rock wool,
For example, this was generally the case when using non-foaming refractory coatings such as lightweight mortar. In other words, this type of refractory coating has excellent and stable fire performance,
In order to obtain the required fire resistance performance, the fire-resistant coating material had to be applied quite thickly. For this reason, there has been a problem that the work of applying the fire-resistant coating material is troublesome, the use space of the building is reduced due to the thick coating, and the coating is easily peeled off by its own weight instead of the thick coating. In particular, when applying a fire-resistant coating material using conventional coating equipment, there is a limit to the thickness that can be applied in a single application. Had to be done.

On the other hand, when using a foaming refractory paint, it is not necessary to apply it so thickly. Therefore, there is an advantage that the application device can be applied even if it is a little small. There is a limit to the thickness, and there is a concern about the necessity of repeated blowing and the stability and certainty of the fire resistance performance as compared with the non-foaming fire-resistant covering material. In other words, there is some anxiety about whether foaming can be surely made in the event of an actual fire and a stable heat insulating layer having a predetermined thickness can be formed. In addition, a coating layer made of a foaming refractory paint has its own surface strength under a normal environment, but once foamed in a fire environment, the strength is greatly reduced. There is a concern that the heat insulating layer is easily peeled off and dropped off when the members come into contact or due to wind pressure or the like.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has sufficient fire resistance and reliability, and has a thinner fire-resistant coating (hereinafter referred to as a fire-resistant layer) than before. It is an object of the present invention to provide a hybrid fire-resistant coating structure and a fire-resistant coating method capable of simplifying the method.

[0013]

Means for Solving the Problems According to a first aspect of the present invention, there is provided a basic structure using iron partially or entirely, and a method of forming the basic structure by coating on the surface side of the basic structure. a non-foaming fireproofing material layer which is a non-expandable fireproofing material layer foamable refractory coating layer formed by coating on the surface side of the, with obtaining Bei a, the non-foaming fireproofing material,
This is a composite lightweight mortar mixed with aggregate and contains organic
The gist of the present invention is a hybrid fire-resistant coating structure comprising foam powder or granules .

According to a second aspect of the present invention, there is provided a hybrid fire-resistant covering structure according to the first aspect, wherein the basic structure is a steel column or beam. Claim 3
The gist of the invention is that the basic structure is a wall or a floor partially containing iron.

[0015]

[0016] Incidentally, the thickness between the non-foaming fireproofing material layer and the foamed refractory coating layer, depending on the performance division of the refractory structure by fire test method specified in Ministry of Construction Notice No. 2999, under
It may be used as the thickness of the serial Table 1.

[Table 1]

According to a fourth aspect of the present invention, the basic structure has an intermediate coating layer interposed between the non-foamable fire-resistant coating material layer and the foamable fire-resistant paint layer. The gist is the hybrid fire-resistant coating structure according to any one of 1 to 3 .

[0018] The invention of claim 5, to the external corner portion of the non-foaming fireproofing material layer covering the corners of the base structure, curved
The foamed refractory paint layer having a substantially uniform thickness is formed on the surface of the corner where the chamfer has been performed, with or without the intermediate coating layer. The gist is a hybrid fire-resistant coating structure according to any one of claims 1 to 4 . The invention according to claim 6 provides the basic structure
For the protruding corner of the non-foamable refractory coating that covers the corners of the body
And straight-chamfered, and
On the surface, with or without the intermediate coating layer, foaming
The characteristic feature is that the refractory paint layer is formed to a substantially uniform thickness.
The hybrid according to any one of claims 1 to 4,
The main point is a fireproof covering structure.

The invention according to claim 7 is characterized in that a non-foamable refractory coating material is provided.
The composite lightweight containing organic foam powder or granules in the component
Using aggregate mixing mortar, the surface side of the base structure using iron part or whole, after covering by applying the non-foaming fireproofing material, to not over or passing through the intermediate coating layer The gist of the present invention is a hybrid fire-resistant coating method, characterized in that the surface of the non-foamable fire-resistant coating material is covered by applying a foaming fire-resistant paint.

Next, with respect to each configuration of the present invention described above,
explain in detail. (1) As the basic structure, H-shaped steel, grooved steel, I
Commonly used steel frames and steel pipes, such as shaped steel, equilateral angle steel, unequal angle iron, square steel pipe, round steel pipe, etc., are also included, as well as lightweight steel frames and other materials such as wire mesh, metal lath, gypsum Base materials such as lath board, ruth cut plywood, gypsum board, calcium silicate board, fiber cement cement calcium silicate board, hard wood chip cement board, pulp mixed asbestos cement board, slag gypsum cement board, glass fiber mixed slag gypsum board, asbestos cement Extruded board, ceramic siding board and PC board such as fiber-mixed cement perlite board, A
Combination with a base material using an LC plate and the like can be given.

(2) As the iron material used for the basic structure, a structural steel material can be usually used, but it is more preferable to use FR steel. This FR steel is a steel material having a higher heat resistance than a conventional structural steel material, and has a yield strength at 600 ° C. that is ２ or more of a yield strength at room temperature. Can be reduced.

(3) The term fireproof such as a fireproof coating material or a fireproof paint means, in the case of the present application, fireproof of a fireproof structure usually used, or quasifireproof in a quasifireproof structure. (4) As a non-foaming fireproof coating material , compound lightweight aggregate is mixed
Use mortar and add organic foam powder or granules
Contains. For example Ru can accept the material及<br/> beauty combinations thereof, including those below ~. Cement mortar perlite mortar, vermiculite mortar dry sprayed rock wool, semi-dry sprayed rock wool wet sprayed rock wool, vermiculite plaster sprayed material, aluminum hydroxide sprayed material, wet site foaming agent mixed mortar, wet site foamed mortar cellulose Fiber spray material

(5) Foamable refractory paint is one that foams to form a heat insulating layer having a heat insulating effect when subjected to high heat as in a fire. (6) As the foamable refractory paint, for example, a paint containing the following binder, foaming agent, carbonized layer-forming agent, and the like can be adopted, but is not limited thereto as long as it exhibits the same function. Absent.

A) Binder (1) Alkyd resin Pure alkyd resin; alkyd resin modified with alkyd resin such as ultrashort oil, short oil, medium oil, long oil, ultralong oil; rosin modified, phenol modified, epoxy modified, styrenated , Acrylated, urethane modified,
Alkyd resins such as silicone-modified and amino-resin-modified Oil-free alkyd resins; oil-free, high-molecular-weight oil-free, ultra-short oil, non-drying oil-modified short oil, dry-oil-modified medium oil, dry-oil-modified long oil, dry-oil-modified ultra-long Oil, rosin-modified, phenol-modified, epoxy-modified, styrenated, acrylated, urethane-modified, silicone-modified, amino-resin-modified alkyd resins-Crosslinker; amino resins, nitrocellulose, metal salt dryers, alkyd resins such as urethane Curing agent (2) Amino resin Melamine resin; Butylated melamine resin, methylated melamine resin, benzoguanamine resin Urea resin; Butylated urea melamine resin Crosslinking agent; Acid or heating (3) Vinyl resin Vinyl chloride resin; Vinyl chloride Resin, copolymer with vinyl chloride resin, vinylidene chloride resin vinyl acetate resin; Copolymer with vinyl acid resin and vinyl acetate resin Polyvinyl alcohol Polyvinyl butyral (4) Acrylic resin Thermoplastic acrylic resin Thermosetting acrylic resin Crosslinking agent for modified acrylic resin; amino resin, epoxy resin, polyisocyanate, melamine, polycarboxylic Acid compound, metal dryer (5) Epoxy resin glycidyl ether type; bisphenol A type, bisphenol F type, phenol novolak type, epoxy resin + novolak resin, brominated bisphenol A type, 2, 6
Xylenol type, orthocresol novolak type, bisphenol A novolak type, trifunctional glycidyl ester type; dimer acid, polycarboxylic acid ester type glycidylamine type; aromatic amine type cycloaliphatic self-emulsifying hydrophilic epoxy resin one-pack Modified epoxy resin Epoxy resin curing agent: polymercaptan, aliphatic polyamine, aromatic polyamine, polyamide, tertiary amine, getylaminopropylamine, imidazole,
Tertiary amine salt, alicyclic amine, metal dryer (6) Polyurethane resin One-pack type polyurethane resin; oil-modified polyurethane resin,
Lacquer type polyurethane resin Two-pack type polyurethane resin; Polyol-curable polyurethane resin (type of polyol; acrylic polyol, polyester polyol, isocyanate prepolymer) curing agent; various isocyanates, polyisocyanates (7) Crosslinking of unsaturated polyester resin and metal dryer (8) Phenolic resin Resol type, novolak type curing agent; acid, alkali (9) NAD resin (acrylic non-aqueous emulsion) Acrylic resin dispersion using alkyd resin as dispersion stabilizer Alkylated melamine resin as dispersion stabilizer Acrylic resin dispersion (10) Synthetic resin emulsion Vinyl acetate system; Vinyl acetate resin emulsion, Vinyl acetate copolymer resin emulsion, Ethylene vinyl acetate copolymer resin emulsion, Biacrylate vinyl acetate copolymer resin emulsion Viveova copolymer resin emulsion, Beova acrylic copolymer resin emulsion; where "veova" is a trade name of Shell Chemical Company, meaning vinyl versatate. Acrylics; various acrylate copolymer resin emulsions, self-crosslinking acrylic resin emulsions Styrene acrylics: styrene acrylate copolymer resin emulsions Epoxy resin emulsions Urethane resin emulsions Silicone resin emulsions, modified silicone resin emulsions (11) Water-soluble resins Water-soluble alkyd resin water-soluble acryl-modified alkyd resin water-soluble oil-free alkyd resin water-soluble acrylic resin water-soluble epoxy ester resin water-soluble melamine resin (12) chlorinated polyolefin resin chlorinated polyethylene chlorinated polypropylene (13) silicone resin straight silicone Resin-modified silicone resin; alkyd-modified, epoxy-modified,
Polyester-modified, acrylic-modified, urethane-modified silicone resin (14) Other binders: xylene resin, ketone resin, re-emulsifying resin, ethylene-based copolymer binder specified in JP-A-2-49074, JP-A-4-1992 No. 175152, a one-component modified epoxy resin specified in JP-A-5-86310, alkali metal silicates (various water glasses), colloidal silica, hydraulic cement, calcined gypsum, etc.
4) Use alone and / or in combination of two or more.

B) Blowing agent (1) Chlorinated paraffin (2) Nitrogen-containing compound blowing agent; melamine, dicyandiamide, azodicarboximide, urea, melamine precondensate,
Urea condensate, isocyanuric acid condensate, melamine resin powder, dicyandiamide phosphoric acid condensate, dicyandiamide resin, formaldehyde derivative, sorbite, mannitol, glycerin, trimethylolpropane, paraformaldehyde, hexamethylenetetramine, methylolated urea, methylolated Dicyandiamide, methylolated thiourea, (3) melamine phosphate, guanidine phosphate, guanylurea, guanidine carbonate, guanidine silicate, tylose, dioxane (4) Organic foaming agents; azo foaming agents, nitroso foaming agents, azodicarbonamide , Azobisisobutyronitrile,
N. N'-dinitrosopentamethylene, benzosulfohydrazide (5) Thermally expandable microcapsules; Micropearl F-3
0, Micropearl F-50, Micropearl F-80 (Matsumoto Yushi Co., Ltd.) (6) Expanded graphite; graphite acid sulfate, Na graphite, K graphite, halogenated graphite, aluminum chloride graphite, ferric chloride graphite ( 7) Water glass type; granular water glass, alkali metal silicate,
Alkali metal metasilicate, hydrated water glass, hydrous alkali silicate powder (8) Foaming inorganic powder; perlite powder, anorthite powder, shirasu powder, hillite powder, aluminum phosphate, aluminum hydroxide, zeolite, diatomaceous earth , Synthetic thermal foaming inorganics (9)
Bicarbonate; potassium bicarbonate, sodium bicarbonate c) Carbonized layer forming agent (1) Polyhydric alcohol; pentaerythritol, tetraethanolmethane, dipentaerythritol, tripentaerythritol, ethylene glycol, trimethylolpropane, mannitol (2 ) Polysaccharides; Starch, cellulose, sucrose (3) Casein, paraformaldehyde d) Dehydration catalyst and blowing agent (1) Phosphorus or phosphorus compound; Phosphorus pentoxide, phosphorous acid, orthophosphoric acid, polyphosphoric acid, ammonium phosphate , Trisodium phosphate, tricresyl phosphate, melamine phosphate, phosphorus oxychloride, phosphorus pentachloride (2) Water-resistant phosphorus compound; microencapsulated ammonium polyphosphate, microencapsulated melamine phosphate (3) phosphate compound; polyphosphorus Acid amide, ammonium polyphosphate , Potassium polyphosphate, melamine phosphate e) Special additives (1) Foaming stabilizer; carbide, nitride, charcoal / nitride such as titanium, zirconium, chromium, boron, etc. (2) Foaming stabilizer; flat talc , Flat mica (3) Foaming stabilizer; ultrafine powder of silicone resin f) Fiber (1) Artificial inorganic fiber rock wool, glass fiber, silica alumina fiber, ceramic fiber (2) Artificial organic fiber; carbon fiber, aramid fiber g) Inorganic filler (1) extender pigment: aluminum hydroxide, silica, talc,
Barium sulfate, clay, calcium carbonate, titanium oxide,
Mica, clay, shirasu, cold water stone, silica sand, silica powder, divalent or higher metal oxide, divalent or higher hydroxide (2) coloring pigments; titanium oxide, red iron oxide, orca (3) lightweight aggregate; perlite, Calcined vermiculite, shirasu balloon, glass balloon, ceramic balloon, etc. h) Others (1) paint additives; solvents, plasticizers, film-forming aids, thickeners (CMC, HEC, PVA, etc.), activators (anions) ,
Nonionic, cationic, amphoteric type), dispersant, defoamer (2) flame retardant; halogen compound, organic halogen compound, antimony compound, organic phosphorus compound, ammonium sulfamate, guanyl urea phosphate The composite mortar mixed with the lightweight aggregate has the following composition, for example.

The hydraulic cement comprises a hydraulic cement and a natural or artificial lightweight aggregate, and the natural or artificial lightweight aggregate comprises at least one of shirasu balloon, perlite, calcined vermiculite, and glass balloon, 0.05 to 5.0% by weight of the organic foam powder (or particles).
Examples of the organic foam include styrene foam, urethane foam, polyethylene foam, polypropylene foam, and the like. Further, the mortar contains aluminum hydroxide, calcium carbonate, or a re-emulsified powder resin, and the cured product of the mortar composition has an absolute dry specific gravity of 0.1.
１1.8.

(8) The provisions of the Ministry of Construction Notification No. 2999 for the one-hour refractory structure and the two-hour refractory structure shown in Table 1 above include:
There are columns, beams, walls, and floors, and the three-hour fireproof structure includes columns and beams. Of the thicknesses of the layers in Table 1, those in the range of Table 2 below are more preferable because they have the required fire resistance and are advantageous in terms of workability and total cost.

[0028]

[Table 2]

[0029] (9) above Kinaka through specific intermediate coating layer is mainly because of the suction preventing unevenness at the time of applying a foamable refractory coating to non-foaming fireproofing material layer, expandable fire as a top coat To prevent the transfer of alkali from the non-foamable fire-resistant coating material layer when the paint binder is alkyd-based resin that is weak to alkali, or to adhere the foamable fire-resistant paint to the non-foamable fire-resistant coating material layer Used for improvement. The intermediate paint layer is formed by removing the binders described in the detailed description of the foamable fire-resistant paint, which are weak to alkali exemplified by ultrashort oil, short oil, medium oil, and long oil alkyd resin. Singly or in combination of two or more of them as binders, only binders or fillers, aggregates, lightweight aggregates, extender pigments, coloring pigments, organic fibers, inorganic fibers, thickeners, dispersants, Any of those to which a wetting agent, a solvent, water and the like are added can be used. The amount of the intermediate coating can be appropriately selected and used within a range of about 50 g to 3 kg / m ² . In Tables 1 and 2, the thickness of the intermediate coating layer is considered to be included in the thickness of the non-foamable refractory coating material layer.

(10) Further, in the above-mentioned inventions of claims 1 to 7 , a rust preventive paint or an alkali sealing paint or the like is provided between a steel frame pillar, beam or the like as a base and the non-foamable refractory coating material layer. If necessary, an intermediate adhesion-improving paint or the like can be used within the range conventionally used as a base treatment. In this case, in Tables 1 and 2, the thickness of the undercoat paint layer is considered to be included in the thickness of the non-foamable refractory coating material layer.

[0031]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention has been studied to determine how to reduce the thickness of a fire-resistant layer and to simplify the construction method while securing excellent fire-resistance performance and its reliability in an iron-based fire-resistant coating structure. The result was obtained.

That is, for example, when a non-foaming refractory coating material such as lightweight mortar is used, it has sufficient fire resistance and reliability but must be applied thickly.
When the foaming refractory paint is used, it may be applied thinly, but there is a problem in its reliability and the like, which has advantages and disadvantages. However, in the present invention, these disadvantages are overcome and sufficient fire resistance performance and reliability are obtained. And the thickness of the coating film can be made thinner than before, and the construction method has been significantly simplified.

That is, according to the first aspect of the present invention, a non-foamable refractory coating material layer formed by coating is provided on the surface side of the basic structure, and formed on the surface side of the non-foamable refractory coating material layer by coating. Because it has a foamable fire-resistant paint layer,
After ensuring sufficient fire resistance performance, the thickness of the fire resistant layer composed of both layers can be reduced. This is because, as is clear from the experimental examples described later, a synergistic effect of (1 + 1) or more obtained by simply combining the non-foamable refractory coating material layer and the foamable refractory paint layer, Has a fire resistance performance that is higher than expected compared to its thickness. In addition, in the present invention,
The non-foamable fire-resistant coating material is a composite lightweight aggregate mixed mortar.
With a composition containing organic foam powder or granules in its components
Therefore, reduce the water / cement ratio during construction.
It can be sprayed up to about 40mm thick at a time
In addition to the above advantages, the rise in strength of lightweight mortar
It also has the property of being fast, as in the present invention, as a second layer
Most suitable for structures with foamable refractory paint
It is.

According to the second aspect of the present invention, since the basic structure is a column or a beam made of a steel frame, the fire resistance performance against the steel frame is improved even though the fire-resistant layer can be made thin. According to the third aspect of the present invention, since the basic structure is a wall or a floor partially having iron, the fire resistance of the wall or the floor is improved even though the fire-resistant layer can be made thin.

That is, the fire-resistant structure of the wall by the spraying method, the ironing method or the like has conventionally been a combination of a lightweight steel frame such as a runner or a stud + a lath net (or a fire-resistant board) + a non-foaming fire-resistant covering material. Furthermore, regarding the fire-resistant structure of the floor by spraying method, iron coating method, etc.,
Although the non-foamable refractory coating material is sprayed on the concrete + deck plate combination or the like, according to the present invention, these walls or floors are also referred to as the non-foamable refractory coating material layer and the foamable refractory paint layer. By adopting the configuration, the fire resistance performance is improved.

According to the provisions of the Ministry of Construction Notification No. 2999, the maximum temperature of a fire-resistant structure of a wall or floor is 500 ° C. in the case of a steel structure. In the following, no harmful peeling or cracking deformation occurs at an average temperature of 400 ° C. or less, but in the present invention, the standard is easily satisfied.

For example, as an example of fire resistance for 2 hours on a wall by spraying wet rock wool, individually designated fire resistance W2100
In the case of "Tom Wet ATM-120", a coating thickness of 25 mm is required for spraying wet rock wool, but according to the present invention, a lightweight mortar of 10 to 15 mm + a foamable refractory paint of 4.0 to 1.0 mm may be used. For example, as an example of fire resistance for 2 hours on the floor by wet rock wool spraying, in the case of individually designated "fire resistant F2083 Tomwet SF-120", a wet rock wool spraying of 15 mm is required, but according to the present invention, Lightweight mortar 5-10
mm + foamable refractory paint 3.0 to 1.0 mm. When the non-foamable refractory coating material is made thinner, the foamable refractory coating material is applied thicker. Conversely, when the non-foamable refractory coating material is made thicker, the foaming refractory paint material is applied thinner. The film thickness can be made smaller than that of the non-foamable refractory coating material alone.

[0038]

[0039]

According to the fourth aspect of the present invention, by providing an intermediate coating layer, it is possible to prevent suction unevenness when applying the foaming fire-resistant paint mainly to the non-foamable fire-resistant coating material layer, and to provide a top coat. When an alkyd-based resin or the like is used as a binder of the foamable fire-resistant paint, the transfer of alkali can be prevented, and the adhesion of the foamable fire-resistant paint to the non-foamable fireproof coating material layer can be improved.

According to the fifth or sixth aspect of the present invention, the corner of the non-foamable refractory coating material is chamfered in a curved or straight line, and the surface of the chamfered corner is formed. On the other hand, the foamable refractory paint layer is formed to a substantially uniform thickness with or without the intermediate paint layer. It covers the protruding corner of the fire-resistant coating material layer, so that the fire resistance is not uneven and the reliability of the fire resistance in a fire is improved. In other words, if the corner is finished at a right angle, for example, in the event of a fire, the foaming source of the foamable refractory paint at the corner will be insufficient and thin,
Although it is easy to be broken or split, the present invention can prevent such an abnormality because the foaming source is not insufficient.

According to the invention of claim 7 , after the surface side of the basic structure is coated with a non-foamable fire-resistant coating material, the non-foamable fire-resistant coating material is interposed with or without an intermediate coating layer. Since the surface side of the coating material is coated with the foaming refractory paint, the refractory layer composed of both layers can be formed very easily.
For example, it is possible to form a fire-resistant layer having sufficient fire resistance by simply applying a thin non-foamable refractory coating material by a single application with a coating device and then drying and then applying a thin foamable refractory paint. In addition, the foaming refractory paint also has a role as a decorative layer base layer or as a decorative layer itself. In addition, in the present invention, the non-foamable refractory
The covering material is a composite lightweight aggregate mixed mortar,
Since the composition contains organic foam powder or granules,
Water-cement ratio can be reduced in
The advantage of being able to spray thickly up to about mm thick
In addition, the characteristic that the strength of lightweight mortar rises quickly
In addition, as in the present invention, the foamable refractory paint is used as the second layer.
Is most suitable for the method of combining.

[0043]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the structure and operation of the present invention described above, preferred embodiments of the present invention will be described below. FIG. 1 is a perspective view showing a fire-resistant covering structure of an embodiment, and FIG. 2 is a sectional view thereof.

As shown in FIGS. 1 and 2, when forming the fire-resistant coating structure of the present embodiment, first, a steel material (steel frame) 1 of H-section steel (used for a normal steel structure) is formed. On the surface, for example, a lightweight mortar of a non-foaming refractory coating material is applied, for example, as shown in Table 1 above, 10 mm for 1 hour fire resistance, 20 mm for 2 hours fire resistance, 25 mm for 3 hours fire resistance, The non-foamable refractory coating material layer 3 is formed. Then, after being dried in an air-dry state, an acrylic resin-based foaming refractory paint is applied to the surface of the cured lightweight mortar, for example, 1.5 to 2.5 mm for 1 hour fire resistance and 2 hours for fire resistance. 2.0-4.0mm, 3.0-5.0m for 3 hours fire resistance
m to form a foamable refractory paint layer 5. Thus, the fire-resistant layer 7 in which the non-foamable fire-resistant coating material layer and the foamable fire-resistant paint layer are combined is formed on the surface of the steel material.

The refractory layer 7 has a structure in which a foaming refractory paint is applied to the surface of the non-foaming refractory coating material, despite the fact that the refractory layer 7 is thinner than the case where the refractory coating material is formed alone. In the event of a fire, the foamable refractory paint layer 5 on the outermost surface foams to form a heat insulating layer having a sufficient thickness, thereby exhibiting fire resistance. In addition, since the non-foamable refractory coating material layer 3 that is not easily deteriorated even by high heat is formed on the surface of the steel material 1 densely and firmly, the non-foamable refractory coating material layer 3 also has sufficient fire resistance. It has a remarkable feature that it exhibits performance and the functions of the two layers 3 and 5 are combined, and in any case, the fireproof effect can be obtained reliably and sufficiently.

Further, since the refractory layer 7 of this embodiment is thinner than the conventional non-foamable refractory coating alone, there is an effect that the space can be effectively used. In addition, the surface of the foaming refractory paint itself is cosmetic. In addition, since paint such as paint is generally easy to apply with good surface accuracy as a decorative undercoat layer, for example, when the surface of the fireproof layer 7 is exposed in a conspicuous place, the surface of the foamable fireproof paint layer 5 is removed. By coloring it colorfully or around it,
The aesthetic appearance can be easily improved.

Further, the foamable refractory paint becomes brittle once foamed, and when another member comes into contact with the (foamed) heat-insulating layer during a fire, the heat-insulating layer may fall off. In the present embodiment, since the non-foamable refractory coating material layer 3 is densely and firmly formed on the surface of the steel material 1,
It is possible to prevent the steel material 1 from being directly exposed to fire, and in this respect, there is an advantage that the stability and reliability of fire resistance performance can be improved.

In particular, as shown in an enlarged manner in FIG. 2 (b), a (radius) is formed on the protruding corner 11 of the non-foamable refractory coating material layer 3 corresponding to the corner 9 of the steel material 1 of the H-section steel. In the case where a curved chamfer (of 2 mm or more) or a straight chamfer (of 2 mm or more in length) is applied and the foamable refractory paint layer 5 is formed with a substantially uniform thickness on the surface of the protruding corner portion 11, , In case of fire,
There is no foaming source of the foamable refractory paint layer 5 at the protruding corner portion 11, so that the foaming source is not thinned, cracked, or separated, and the fireproof performance is further improved.

For example, as shown in FIG. 3, the non-foamable refractory coating material layer 2 corresponding to the corner 23 of the square steel material 21 is formed.
By performing the same chamfering on the protruding corner 27 as described above, the foamable refractory paint layer 29 covering the surface of the protruding corner 27 breaks or breaks after foaming in the event of a fire or the like. Therefore, the effect that the fire resistance performance is improved can be obtained.

Next, an experimental example in which the effect of the present invention has been confirmed will be described. In addition, in the evaluation of the fire resistance performance described in the invention such as the conventional foaming refractory paint, the test method varies depending on the inventor. It is described,
Actually, it is not practical unless it is evaluated based on a fire resistance test specified in Ministry of Construction Notification No. 2999.
In this regard, the present inventors have conducted rigorous tests and evaluations by the same method so as to be suitable for practical use. For this reason, the coating thickness of the foaming refractory paint shown in the comparative example of the present invention is more practical than the coating thickness of the conventionally known foaming refractory paint.

<Experimental Example 1> The first layer (non-foamable refractory coating material layer) and the first layer in the present example (Examples 1 to 25) and comparative examples (Comparative Examples 1 to 10) are shown in Tables 3 to 7 below. Shows the composition of the second layer (foamable fire-resistant paint layer), the thickness of the first and second layers (coating thickness [mm]), and the performance of the fire-resistant layer obtained by conducting experiments such as fire-resistance performance. Was. In addition, the numerical value which shows the combination in a table | surface means a weight part. When preparing a test body, when using a lightweight mortar, the mixture was kneaded with water and then applied.

Further, the test items and the evaluation of the performance were as follows. <Regarding Test Items and Judgment Criteria> (1) Fireproof Coating Workability Judgment was made based on the difficulty of the work required for the fireproof coating work when coating to the required thickness for 1 hour fireproof performance.

○: When performing the necessary coating, the coating work is not restricted by displacement or dripping, and the workability is good. Δ: When applying the necessary coating, the coating work was somewhat restricted due to misalignment or dripping, and the workability was somewhat poor.

C: When performing the necessary coating, the coating work is restricted by displacement or dripping, and the workability is poor. (2) Finish feeling In the case of the “lightweight mortar + foamable refractory paint” of the present invention, the lightweight mortar is troweled and then sprayed with the foamable refractory paint, and when the “foamable fireproof paint” alone is used, the foamable refractory paint is used. In the case of the other comparative examples, the finished state after ironing or finishing by spraying with an iron was visually judged.

；: The surface is smooth and dense, the color tone is uniform and the design is excellent. Δ: Although the surface is smooth, color unevenness occurs due to white spots and the like, and the design is slightly inferior. ×: The surface is porous and unsightly, and color unevenness also occurs due to a difference in density of spraying or white spots, and the design is inferior. (3) Durability in normal environment Steel column (H300 × 300 × 10 × 15mm, length 18
(00 mm) and exposure was performed indoors to make a judgment.

；: No abnormalities such as peeling or discoloration after half a year of exposure. Δ: Changes such as chalking and efflorescence appear on the surface after half a year of exposure. X: Change of chalking or white spots on the surface by exposure for half a year, and further partial peeling. (4) Adhesion in a normal environment After a predetermined coating shown in Examples and Comparative Examples was cured in a room in an ordinary environment for one month, the adhesion in a standard state was measured for an attachment having a length of 100 mm and a width of 100 mm. Using a Kenken-type adhesion tester (LPT-
1500), and the average value was determined according to the following criteria.

○: 100 g / cm ² or more Δ: 50 to 99 g / cm ² ×; 49 g / cm ² or less (5) Retention of coating layer after heating Steel column (H300 × 300 × 10 × 15 mm, length 18)
00 mm), the Ministry of Construction Notification 2999
Judgment was made based on the retention of the refractory coating material layer after a one-hour refractory test was carried out according to the heating test method of the refractory test specified in the above item.

；: Good without any abnormalities such as peeling or cracking which are considered to be harmful in fire resistance in the test. Δ: Partial or surface peeling may occur in the test, which may be harmful to fire resistance. X: Peeling or cracking considered to be harmful in fire resistance in the test occurs. (6) Fire resistance H-section steel for column structure (H300 × 300 × 10 × 15mm,
(1800 mm in length), the specimen was subjected to a heating test for one hour in accordance with the heating curve of the fire resistance test method for building structural parts specified in the Ministry of Construction Notification No. 2999, and the average of the peak temperatures at 21 points of the steel material was measured. Determined by value.

○: The average temperature of 21 steel materials is 350 ° C. or less △: The average temperature of 21 steel materials is 351 ° C. to 450 ° C. ×: The average temperature of 21 steel materials is 451 ° C. or more

[0060]

[Table 3]

[0061]

[Table 4]

[0062]

[Table 5]

[0063]

[Table 6]

[0064]

[Table 7]

<Experimental Example 2> The following Example 1 was used.
Examples 26 to 3 performed other than Comparative Examples 1 to 10 and Comparative Examples 1 to 10
2 and the experimental results of the test items (1) to (6) described above.

In Experimental Example 2, a combination of a lightweight mortar and a foaming refractory paint was used, and their thickness was changed. The evaluation is shown in Table 8 below. (Example 26) Structure: In Example 1, the lightweight mortar as the first layer was 15 mm, and the thickness of the foamable refractory paint as the second layer was 1.2 m.
In the case of combination with m. (Example 27) Structure: In Example 6, the lightweight mortar as the first layer was 15 mm, and the thickness of the foamable refractory paint as the second layer was 1.2 m.
In the case of combination with m. (Example 28) Structure: In Example 11, the lightweight mortar as the first layer was 15 mm, and the thickness of the foamable refractory paint of the second layer was 0.8.
In combination with mm. (Example 29) Structure: In Example 16, the lightweight mortar as the first layer was 15 mm, and the thickness of the foamable refractory paint of the second layer was 1.2.
In combination with mm. (Example 30) Configuration: In Example 2, the lightweight mortar as the first layer was 5 mm, and the thickness of the foamable refractory paint as the second layer was 2.5 mm.
In combination with (Example 31) Structure: In Example 7, the weight of the lightweight mortar as the first layer was 5 mm, and the thickness of the foamable refractory paint of the second layer was 3.0 mm.
In combination with (Example 32) Structure: In Example 12, the lightweight mortar as the first layer was 5 mm, and the thickness of the foamable refractory paint of the second layer was 2.5 m.
In the case of combination with m.

[0067]

[Table 8]

<Experimental Example 3> Further, Examples 33 to
36, the configurations of Comparative Examples 11 to 14 and the experimental results thereof were described. In Experimental Example 3, a combination of a lightweight mortar and a foaming refractory paint was used, and the corners protruding were curved or straight. Here, Comparative Examples 11 to 14
Is a comparative example with respect to a case where the protruded corner is chamfered in a curved shape or a straight shape, and the composition and the thickness of the layer are in the range of the above-described example. The results of the evaluation are shown in Table 9 below.
In addition to the test items (1) to (6), the following test item (7) was added. (7) State of Outer Corner after Heating (Evaluation of Examples 33 to 36 and Comparative Examples 11 to 14) In the above test item (5), in the test of coating layer retention after heating, in particular, about the outer corner. It was observed and evaluated according to the following criteria.

；: Outer corners are almost uniformly foamed like the flat portions, and there is no abnormality in skin separation and peeling. Δ: Some skin separation occurs at the protruding corner. ×: Abnormality of skin separation or peeling occurs at the protruding corner. (Example 33) Structure: In Example 1, the lightweight mortar as the first layer was set to 10 mm, and the protruding corner portion was curved to 2 mm, and then the thickness of the foamable refractory paint of the second layer was set to 2.0 mm. When finished with. (Example 34) Structure: In Example 6, the lightweight mortar as the first layer was set to 10 mm, and the protruding corner portion was curved to 2 mm, and then the thickness of the foamable refractory paint of the second layer was set to 2.0 mm. When finished with. (Example 35) Configuration: In Example 6, the light-weight mortar as the first layer was set to 10 mm, and the corners were straight-chamfered to 2 mm, and then the thickness of the foamable refractory paint of the second layer was adjusted to 2 mm. When finished with 0.0 mm. (Example 36) Structure: In Example 11, after the light-weight mortar as the first layer was 10 mm, the corners were straight-chamfered to 2 mm, and the thickness of the foamable refractory paint of the second layer was 1 mm. When finished with .5mm. (Comparative Example 11) Configuration: In Example 1, the light-weight mortar as the first layer was 10 mm, and the protruding corner portion was made a right angle. Then, the thickness of the foamable refractory paint of the second layer was finished at 2.0 mm. In addition to the evaluation of the corner in the case. (Comparative Example 12) Structure: In Example 11, the light-weight mortar as the first layer was set to 10 mm, and the protruding corner portion was set to a right angle. Then, the thickness of the foamable refractory paint of the second layer was finished to 1.5 mm. In addition to the evaluation of the corner in the case. (Comparative Example 13) Configuration: In Comparative Example 2, the thickness of the foamable refractory paint was set to 5.
Evaluation of the protruding corner when finished with 0 mm. (Comparative Example 14) Configuration: In Comparative Example 6, the thickness of the foamable refractory paint was set to 5.
Evaluation of the protruding corner when finished with 0 mm.

[0070]

[Table 9]

<Experimental Example 4> Further, Examples 37 to
38, the configurations of Comparative Examples 15 and 16 and the experimental results thereof were described. The evaluation is shown in Table 10 below. Test Example 4 is a combination of a lightweight mortar and a foaming refractory paint.
Of the items (6), the items (1) to (4) are performed in the same manner as in Experimental Example 1, and the refractory tests of the items (5) and (6) are performed for 2 hours based on the same method. Then, regarding the item (5), the retention of the coating layer after the test was evaluated, and (6)
The term is obtained by evaluating the average temperature of the peak value of the steel material temperature. The evaluation criteria are the same as in Experimental Example 1. (Example 37) Structure: In Example 1, the lightweight mortar as the first layer was 20 mm, and the thickness of the foamable refractory paint of the second layer was 3.
When finished with 0mm. (Example 38) Configuration: In the case of Example 11, the lightweight mortar as the first layer was 20 mm, and the thickness of the foamable refractory paint of the second layer was 2.5 mm. (Comparative Example 15) Structure: In Comparative Example 2, the thickness of the foamable refractory paint was 7.
When finished with 0mm. (Comparative Example 16) Structure: In Comparative Example 6, the thickness of the foamable refractory paint was 7.
When finished with 0mm.

[0072]

[Table 10]

<Experimental Example 5> Further, Examples 39 to
40, Comparative Examples 17 to 18 and the experimental results thereof were described. The evaluation is shown in Table 11 below. Test Example 5 is a combination of a lightweight mortar and a foaming refractory paint.
Of the items (6), items (1) to (4) are performed in the same manner as in Experimental Example 1, and those obtained by the fire resistance tests of items (5) and (6) are subjected to a 3-hour heating test based on the same method. Then, regarding the item (5), the retention of the coating layer after the test was evaluated, and (6)
The term is obtained by evaluating the average temperature of the peak value of the steel material temperature. The evaluation criteria are the same as in Experimental Example 1. (Example 39) Structure: In Example 1, the lightweight mortar as the first layer was 25 mm, and the thickness of the foamable refractory paint of the second layer was 4.
When finished with 5mm. (Example 40) Configuration: In the case of Example 11, the lightweight mortar as the first layer was 20 mm, and the thickness of the foamable refractory paint of the second layer was 4.5 mm. (Comparative Example 17) Structure: In Comparative Example 2, the thickness of the foamable refractory paint was 1
When finished with 0.0mm. (Comparative Example 18) Configuration: In Comparative Example 6, the thickness of the foamable refractory paint was 1
When finished with 0.0mm.

[0074]

[Table 11]

<Experimental Example 6> In addition, Examples 41 to
42, the configurations of Comparative Examples 19 to 20 and the experimental results thereof were described. The evaluation is shown in Table 12 below. This experimental example 6 describes the invention of claim 6. The test items, methods and evaluations are the same as those of the experimental examples 1 (1) to (6), and the following test (8). Item added.

(8) Intermediate Adhesion in Normal Environment After the steel plate coated in a predetermined manner was cured in a room in a normal environment for one month, a cut was made in the measurement portion as shown in FIG. Then, the intermediate adhesiveness in the standard state was measured at three locations using a Kenken-type adhesive strength tester (LPT-1500) manufactured by Yamamoto Hoikiki Co., Ltd. using an attachment of 70 × 70 mm, and the average value was measured. Indicated. (Example 41) The light weight mortar of Example 1 was replaced with 9.5.
mm, and then air-dried. Intermediate coating 1 of the following composition was applied by 0.5 mm intervening. After drying, the foamable refractory coating of Example 1 was further applied and cured by 2.0 mm. Was subjected to the same test as in the above-described experimental example to evaluate its performance.

Intermediate paint 1 (% by weight) Binder A; Almatex Z115 30.0 water, manufactured by Mitsui Toatsu Chemicals, Inc. 17.3 Solvent: butyl carbitol acetate 2.0 titanium dioxide; Ishihara Sangyo Co., Ltd. -820 10.0 Calcium carbonate; Sohlon 100 40.0 dispersant manufactured by Bihoku Powder Chemical Industry Co., Ltd .; Nopco Santo K 0.2 wetting agent manufactured by San Nopco Co., Ltd .; Nopco Wet 50 0.2 manufactured by San Nopco Co., Ltd .; 8034L 0.1 thickener; Metroose SM 1500 0.2 manufactured by Shin-Etsu Chemical Co., Ltd. (Example 42)
After painting 0 mm, it was air-dried, intermediate coating 2 having the following composition was applied 1.0 mm intervening, and after drying, the foamable refractory paint of Example 17 was further painted 2.0 mm and cured. Was subjected to the same test as in the above-described experimental example to evaluate its performance.

Intermediate paint 2 (% by weight) Binder A; Almatex Z115 20.0 manufactured by Mitsui Toatsu Chemicals Binder B; Asano White Cement 40.0 Shirasu balloon manufactured by Nippon Cement Co., Ltd. Sanki manufactured by Sanki Kogyo Light B03 10.0 Carbon fiber; Dialead fiber length 3 mm, manufactured by Mitsubishi Kasei Co., Ltd. 1.0 Water; 28.3 Dispersant; Sannopco's Nopco Santo K 0.2 Wetting agent; Sannopco's Nopco Wet 50 0.2 Foaming agent: Nopco 8034L 0.1 manufactured by San Nopco Co., Ltd. Thickener: Metrolose SM 1500 0.2 manufactured by Shin-Etsu Chemical Co., Ltd. (Comparative Example 19) For the combination of Example 1, only the test item (8) was added, The interface between the foaming refractory coating material layer and the foaming refractory paint layer was evaluated. (Comparative Example 20) With respect to the combination of Example 17, only the test item (8) was added, and the interface between the non-foamable fireproof coating material layer and the foamable fireproof paint layer was evaluated.

[0079]

[Table 12]

Here, the materials used in the above experiment will be described in detail. <Raw materials> Portland cement; Nippon Cement Co., Ltd. ordinary Portland cement re-emulsifiable resin; Hoechst Gosei Co., Ltd. Movinyl DM-200 perlite; Mitsui Mining & Smelting Co., Ltd. Mitsui Perlite C; Dolomite plaster; JIS A 6903 Compatible product for overcoating Calcium carbonate; Soflon 1000 methylcellulose manufactured by Bihoku Kagaku Kogyo; Metrolose SM1500 manufactured by Shin-Etsu Chemical Co., Ltd. Alkali-resistant glass fiber; Nitto Boseki CSV13P
B800 Styrofoam particles; average particle size: 1.2 mm; bulk specific gravity: 0.067 Shirasu balloon; Sankilite B03 aluminum hydroxide manufactured by Sanki Kogyo; Heidilite H-10 bentonite manufactured by Showa Denko; Kunigel VS carbon fiber manufactured by Kunimine Kogyo Dialead K661 manufactured by Mitsubishi Kasei Co., Ltd. fiber length 10 mm silica sand; silica sand No. 6 resin binder 1: binding component by acrylic resin emulsion; resin solid component by Movinyl 747 manufactured by Hoechst Gosei Co., Ltd. resin binder 2: binding component by polyol mixture and isocyanate Castor oil from Ito Oil 72
A mixture of 19 parts by weight of Adeka Resin 6060 manufactured by Asahi Denka Co., 8 parts by weight of 3,3'-dichloro4,4'-diaminophenylmethane and 1 part by weight of 4,4'-methylenedianiline was added to Mitsui. Isocyanate CR manufactured by Toatsu Chemical
Using 200, the ratio of the polyol mixture to the isocyanate was selected such that the ratio of the total number of moles of isocyanate groups to the total number of moles of hydroxyl groups and amino groups of the polyol mixture was 1, resin solid component resin binder 3; Epoxy resin and its hardener-binding component; 100 parts by weight of Easion EA1 manufactured by Kanebo Wen S.C.
Resin solid component by binder used in a ratio of 0 parts by weight Resin binder 4: Binding component by vinyl chloride / vinyl acetate copolymer resin emulsion; Resin solid component by Mobile 190E manufactured by Hoechst Gosei Co., Ltd. Resin binder 5: By salt rubber resin Binding component;
Resin solid component by binder using Asahi Denka Co., Ltd. ADEKA chlorinated rubber resin CR-5 at 60 parts by weight and chlorine para 70 at a ratio of 40 parts by weight as a plasticizer Melamine resin powder; Melt powder from Mitsui Toatsu Chemicals Graphite: Expanded graphite SMF phosphorus compound manufactured by Chuetsu Graphite Industries, Ltd. EX manufactured by Hoechst Japan
OLIT462 (microencapsulated ammonium polyphosphate) Flat mica fine powder; Szolite mica 200S manufactured by Kuraray Granular water glass; Na ₂ O: SiO ₂ = 1: 3.
Granular water glass having a composition of 9 (molar ratio) (particle diameter 0.8 mm)
Glass fiber; glass fiber length 3 mm, manufactured by Nitto Boseki Co., Ltd. Silicon carbide fine powder; silicon carbide fine powder, manufactured by Tokai Carbon Co., Ltd. Titanium white; Ishihara Sangyo Co., Ltd.
-820 Shirasu powder: 200 mesh product of Shirasu powder manufactured by Ichi Kasei Co., Ltd. Pearl powder: 200 mesh product of pearlite crushed by Mitsui Kinzoku Kogyo Co., Ltd. It has excellent performance in finish feeling, durability in a normal environment, adhesion in a normal environment, coating layer retention after heating, and fire resistance. In particular, those in which the corners are chamfered in a curved or straight line are excellent in the state of the corners after heating, and are more preferable. On the other hand, the comparative example is not preferable in all respects, and is not always preferable. In addition, since the said comparative examples 11-12 are comparative examples with respect to the thing which chamfered the curved corner or the straight line at the protruded corner part, the overall fire resistance performance is excellent. Also,
It is clear that those having the intermediate coating layer have excellent adhesiveness.

Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and various embodiments can be adopted without departing from the gist of the present invention.

As described in detail above, according to the first aspect of the present invention, the non-foamable refractory coating material layer formed by coating is provided on the surface side of the basic structure. Since the foamable refractory paint layer formed by application is provided on the front surface side, the thickness of the refractory layer comprising both layers can be reduced while ensuring sufficient fireproof performance. This exerts a synergistic effect more than simply combining the non-foamable refractory coating material layer and the foamable refractory paint layer. In addition, it is economically advantageous because it has both surface cosmetic properties. Moreover, the original
According to Ming, non-foamable refractory coatings are
Lutar, which contains organic foam powder or granules in its components.
Since it is a composition that contains
The ratio can be reduced and sprayed to a thickness of about 40mm at a time.
In addition to the advantage that it can be
In addition to the quick rise characteristics, as in the present invention,
For structures that combine foamable fire-resistant paint as two layers,
Are also suitable.

According to the second aspect of the present invention, since the non-foamable fire-resistant coating material layer and the foamable fire-resistant paint layer are provided on the surface of the steel structure of the column or the beam, the fire-resistant layer comprising both layers can be made thin. Regardless, the fire resistance performance against steel frames is improved. According to the third aspect of the present invention, since the non-foamable refractory coating material layer and the foamable refractory paint layer are provided on the surface of the basic structure including iron on a part of the wall or floor, the refractory layer composed of both layers can be thinned. Nevertheless, the fire resistance performance on the wall or floor is improved.

[0084]

[0085]

According to the fourth aspect of the present invention, it is possible to prevent suction unevenness when applying the foaming refractory paint to the non-foaming refractory coating material layer, and to make the binder of the foaming refractory paint to be an overcoat alkaline. This has the effect of preventing the migration of alkali when a weak alkyd-based resin or the like is used, and improving the adhesiveness of the foamable fire-resistant paint to the non-foamable fire-resistant coating material layer.

According to the fifth or sixth aspect of the present invention, the protruding corner of the non-foamable refractory coating material is chamfered in a curved or straight line, with or without the intermediate coating layer. Since the foamable refractory paint layer is formed to a substantially uniform thickness on the surface of the protruding corner, in the event of a fire, the foaming source of the foamable refractory paint on the protruding corner becomes insufficient and becomes thin or cracked. No fire or skin splitting, it can reliably demonstrate fire resistance.

According to the invention of claim 7 , after the surface side of the basic structure is coated with a non-foamable refractory coating material, the non-foamable refractory coating material is applied with or without an intermediate coating layer. Since the surface side of the material is coated with the foaming refractory paint, the refractory layer composed of both layers can be easily formed by an extremely simple operation. Further, a new cosmetic coating can be omitted. Only
According to the present invention, the non-foamable refractory coating material is a composite lightweight bone.
Mortar mixed with organic foam powder
Or, because it is a composition containing grains, the water
The cement ratio can be reduced, and the thickness can be reduced to about 40 mm at a time.
In addition to the advantage that it can be sprayed well, lightweight mortar
In addition to the characteristic that the rise of strength is fast,
, A method combining a foamable refractory paint as the second layer
Is the most suitable.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a fireproof covering structure according to an embodiment of the present invention.

FIGS. 2A and 2B show a fire-resistant coated structure of an H-section steel, in which FIG. 2A is a cross-sectional view and FIG.

FIG. 3 is a cross-sectional view showing a refractory coating structure of square steel.

FIG. 4 is an explanatory diagram showing a method for measuring adhesiveness.

[Explanation of symbols]

1,21 ... Steel material 3,25 ... Non-foamable fireproof coating material layer 5,29 ... Foamable fireproof paint layer 7 ... Fireproof layer 9,23 ... Corner portion 11,27 ... Outer corner portion

──────────────────────────────────────────────────続 き Continuing from the front page (73) Patent holder 592067395 Nippon Kasei Co., Ltd. 6-5-1, Nishishinjuku, Shinjuku-ku, Tokyo (73) Patent holder 394003667 Nippon Plaster Co., Ltd. Miyashita-cho, Kuzuu-cho, Anso-gun, Tochigi Prefecture Banpachi (73) Patent holder 390025612 Fujikawa Building Materials Co., Ltd. 13 Torihama-cho, Kanazawa-ku, Yokohama-shi, Kanagawa (73) Patent holder 000174932 Mitsui Kinzoku Paint Chemical Co., Ltd. 2-1-1 Nihonbashi Muromachi, Chuo-ku, Tokyo (72) Inventor Yoshihiro Takao 2-4-2 Daisaku, Sakura City, Chiba Prefecture Inside the Onoda Development Laboratory Co., Ltd. (72) Inventor Terugo Inoue 1-9-13 Kita-Motani, Ota-ku, Tokyo Tsunewa Chemical Industry Co., Ltd. Within the Technology Research Institute (72) Inventor Tokuhisa Tokimoto 2-457 Matsumotocho, Kakamigahara-shi, Gifu Prefecture Kikusui Chemical Industry Co., Ltd. (72) Inventor Takemi Yada Ichiban-cho, Yokkaichi-shi, Mie Pref., Suzuka Fine Co., Ltd.Technical headquarters (72) Inventor Takashi Moriwaki 25-11, Oji-machi, Namerikawa-cho, Hiki-gun, Saitama Prefecture Nihon Kasei Co., Ltd. 72) Inventor Kuniyuki Okuyama 7-8 Miyashita-cho, Kuzuu-cho, Anso-gun, Tochigi Japan Within Plaster Co., Ltd. (72) Inventor Susumu Harada 13 Torihama-cho, Kanazawa-ku, Yokohama-shi, Kanagawa Prefecture (72) Inventor Kozo Tabata 3-7-1 Nishiura Nishiura, Funabashi-shi, Chiba Mitsui Kinzoku-Paint Chemicals Co., Ltd. (56) References JP-A-1-260139 (JP, A) 19558 (JP, Y2) (58) Field surveyed (Int. Cl. ⁶ , DB name) E04B 1/94

Claims (7)

(57) [Claims] 1. A basic structure using iron partially or entirely, a non-foamable fire-resistant coating material layer formed by coating on the surface side of the basic structure, and a surface of the non-foamable fire-resistant coating material layer obtain Bei and a foamable fire-resistant coating layer formed by coating on the side
In addition, the non-foamable fire-resistant coating material
Containing organic foam powder or granules in its components.
And a hybrid fire-resistant coating structure. A hybrid fire-resistant coating structure. 2. The hybrid fire-resistant covering structure according to claim 1, wherein said basic structure is a steel column or beam. 3. The hybrid fire-resistant covering structure according to claim 1, wherein the basic structure is a wall or a floor partially containing iron. Wherein said base structure is, any non-foaming fireproofing material layer and foamable to not above claim 1, characterized in that it has a middle intermediary to intermediate coating layer of refractory coating layer 3 The hybrid fire-resistant coating structure according to any one of the above. 5. A chamfered curve is formed on a protruding corner of a non-foamable refractory coating material layer covering a corner of the basic structure,
On the surface of the external corner portion subjected to chamfering, and not through or passing through the intermediate coating layer, to free the claim 1, characterized in that the formation of the foamed refractory coating layer substantially uniform in thickness 4 A hybrid fire-resistant coating structure according to any one of the above. 6. A non-foaming resistant covering the corners of the basic structure.
For the protruding corner of the fire cladding material layer, bevel it in a straight line,
On the surface of the corner that has been chamfered, apply the intermediate coating layer
With or without interposition, the foamable refractory paint layer has a nearly uniform thickness.
5. The method according to claim 1, wherein
The hybrid fire-resistant coating structure according to any one of the above. 7. A non-foamable refractory coating material, wherein
Mortar with composite lightweight aggregate containing foam or powder
The use, the surface side of the base structure using iron part or whole, on
Serial after covering by applying a non-effervescent fireproofing material that, by not through or passing through the intermediate coating layer, the surface side of the non-expandable fireproofing material, covered by coating a foamable refractory coating A hybrid fire-resistant coating method characterized by the following.