JPH07259212A - Hybrid fire-proof coated structure body and its fire-proof coating work method - Google Patents

Abstract

PURPOSE:To provide a sufficient fire-proof performance and reliability, make the thickness of a fire-proof coating (hereafter referred to as fire-proof layer) thinner, and facilitate its work method. CONSTITUTION:When a hybrid fire-proof coated structural body is formed, a non-foaming fire-proof coating material such as light weight mortar is applied on the surface of an H-shape steel material 1 by a specified thickness to form a non-foaming fire-proof coating material layer 3. After that, a foaming fire- proof paint of acrylic resin system is applied one the surface of the cured light- weight mortar by a specified thickness to form a foaming fire-proof paint layer 5. Also curved or linear chamfering is given to the corners 11 of the non- foaming fire-proof coating material layer 3 corresponding to the corner 9 of the steel material 1, and the foaming fire-proof paint layer 5 is formed on the surface of the corners 11 at an approximately uniform thickness. Then an intermediate coat paint layer is provided between the non-foaming fire-proof coating material layer 3 and the foaming fire-proof paint layer 5.

Description

Detailed Description of the Invention

[0001]

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

[0002]

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

In order to maintain the fire resistance performance of such a steel frame structure and the like at a constant level, the Building Standard Law establishes certain standards. In other words, according to the Building Standard Law, in order to prevent collapse of a building at the time of fire, it is necessary for each structure of pillars, beams, walls, floors, and roofs depending on the scale, number of floors, usage, and regional characteristics. Fire resistance is fixed.

Concretely, there are the following rules as the designation of the conventional fireproof structure. General designation; Reinforced concrete structure, steel frame reinforced concrete structure, iron net mortar coated steel frame structure, iron net pearlite mortar coated steel frame structure, etc. Fire resistant structures described in Ministry of Construction Notification No. 1675 Nos. 1 to 5.

General specification: sprayed rockwool coated steel frame structure, fiber mixed calcium silicate coated steel frame structure, asbestos / rockwool board coated steel frame structure, hollow pressed concrete panel floorboard structure, concrete deck plate synthetic slab structure, sprayed rockwool coated Fire resistant structure with general specifications such as zinc-iron plate roof structure.

Individual designation; wet sprayed rockwool coated steel frame structure, vermiculite plaster coated steel frame fire resistant structure, aluminum hydroxide / cement type spray material coated steel frame fire resistant structure, concrete filled steel pipe fire resistant structure, asbestos cement extrusion molded plate coated steel frame fire resistant structure , ALC plate coated steel frame fireproof structure,
Wet gypsum-based spray-coated steel frame fire-resistant structure, asbestos-cement extruded board partition wall fire-resistant structure, double-sided inorganic fiber reinforced gypsum board laminated light-weight steel frame base partition wall fire-resistant structure, double-sided cement mortar containing foamed polyethylene board filled outer wall fire-resistant with three-dimensional wire mesh Structure, perforated iron mesh mortar board outer wall fireproof structure, double-sided welded wire mesh cement mortar expanded polystyrene board filled outer wall fireproof structure, ALC floorboard fireproof structure, wet sprayed flint stone coated deck plate concrete floor fireproof structure, wet sprayed rockwool coated concrete deck Plate floor fireproof structure, zinc iron plate perlite sprayed folded plate roof fireproof structure, cellulosic fiber sprayed zinc iron plate folded plate roof fireproof structure, wet gypsum-based spray material metal folded plate roof fireproof structure, etc.

Designation Law Article 38 designation; rock wool thin coating FR steel fire resistant structure, aluminum hydroxide / cement-based spray material coating FR steel fire resistant structure, foam fire resistant paint coated steel frame fire resistant structure, etc. Further, in order to define how much the fire resistant structure exhibits fire resistant performance in an actual fire, the Ministry of Construction Notification No. 2999 specifies a fire resistant test.

Among them, the test method is to heat a test body of a predetermined standard under heating conditions such as a predetermined heating time and a heating temperature. Then, in this test, the ones in which the fire resistance structure of the test body did not have a problem such as cracking or falling off (or within the allowable range), are classified by the test time, and the fire resistance is 1 hour and 2 hours. It is expressed as fireproof for 3 hours.

[0009]

However, each of the above-mentioned fireproof structures has advantages and disadvantages, and further improvement has been desired. For example, when the structural steel frame is coated with dry rock wool, which is a non-foaming fire resistant coating material, one hour according to the fire resistance test specified in Ministry of Construction Notification No. 2999,
To obtain fireproof performance for 2 hours and 3 hours, 30mm thickness,
A dry rock wool coating having a thickness of 45 mm and a thickness of 60 mm is required, and there is a problem that the coating must be made considerably thick in order to obtain sufficient fire resistance.

This is not limited to dry rock wool,
This was generally the case when using non-foaming fire resistant coatings such as lightweight mortar. In other words, although this type of fireproof coating material has excellent and stable fireproof performance,
The refractory coating had to be applied fairly thick to obtain the desired fire resistance. Therefore, there is a problem that the work of applying the fire-resistant coating material is troublesome, the space used in the building is narrowed to apply the fire-resistant coating material, and the fire-resistant coating material is peeled off due to its own weight because of the thick coating. In particular, when applying a fire-resistant coating material with conventional coating equipment, there is a limit to the thickness that can be applied at one time, so if the required fire resistance performance is large, repeat the coating operation many times. There was a problem that it had to do.

On the other hand, when using a foamable refractory paint, it is not necessary to apply it very thickly, so there is an advantage that it can be applied even if the application equipment is a little small, but it is easy to sag because of the viscosity and viscosity of the paint. There is a limit to the thickness, and there is concern over the necessity of spraying over and the stability and certainty of fire resistance performance as compared with the above non-foaming fire resistant coating material. That is, there is some anxiety about whether or not a stable heat insulating layer having a predetermined thickness can be reliably foamed in an actual fire. In addition, the coating layer of the foamable fireproof paint has its own surface strength under normal environment, but once foamed in a fire environment, the strength is greatly reduced. There is a concern that the heat insulating layer may easily peel off and fall off when the members come into contact with each other or due to wind pressure.

The present invention has been made to solve the above problems, and has sufficient fire resistance and reliability, and the thickness of a fire resistant coating (hereinafter referred to as a fire resistant layer) is made thinner than before. It is an object of the present invention to provide a hybrid fireproof coating structure and a fireproof coating construction method thereof which can be performed and can be simplified.

[0013]

In order to achieve this object, the invention according to claim 1 is provided with a basic structure using iron partially or wholly, and provided on the surface side of the basic structure. A hybrid fireproof coating structure comprising a non-foaming fireproof coating layer and a foamable fireproof coating layer provided on the surface side of the nonfoaming fireproof coating layer.

A second aspect of the present invention is based on the hybrid fireproof coating structure according to the first aspect, characterized in that the basic structure is a steel column or a beam. Claim 3
The invention provides a hybrid fireproof coating structure according to claim 1, wherein the basic structure is a wall or floor partially containing iron.

The invention according to claim 4 is characterized in that the non-foaming fireproof coating material is a mortar containing a composite lightweight aggregate, and contains organic foam powder or granules in its components. The summary is the hybrid fireproof coating structure according to any one of 3 above.

According to a fifth aspect of the present invention, the thickness of the non-foaming fireproof coating material layer and the foamable fireproof paint layer is the same as the Ministry of Construction Notification No. 29.
According to the performance classification of the fireproof structure according to the fireproof test method defined in No. 99, the hybrid fireproof coating structure according to any one of claims 1 to 4, wherein the thickness is as shown in Table 1 above. To do.

The invention of claim 6 is characterized in that the basic structure has an intermediate coating material layer as an intermediate between the non-foaming fireproof coating material layer and the foaming fireproof coating material layer. The hybrid fireproof coating structure according to any one of 1 to 5 is a gist.

According to a seventh aspect of the present invention, the corners of the non-foaming fireproof coating material layer covering the corners of the basic structure are chamfered in a curved or straight line, and the chamfered protrusions are formed. 7. The hybrid according to claim 1, wherein a foamable refractory paint layer is formed on a surface of a corner portion with or without the intermediate paint layer to have a substantially uniform thickness. The main point is a fireproof coating structure.

According to the invention of claim 8, after covering the surface side of the basic structure using iron partially or wholly with the non-foaming fireproof coating material, the intermediate coating material layer is interposed or not interposed. A gist of a hybrid fireproof coating method is characterized in that the surface side of the non-foaming fireproof coating material is covered with a foamable fireproof coating material.

Next, regarding each of the above-mentioned configurations of the present invention,
explain in detail. (1) Examples of the basic structure include H-section steel, groove-section steel, I
Commonly used steel frames and steel pipes such as shaped steel, equilateral angle steel, irregular angle steel, square steel pipe, round steel pipe and the like, but in addition to them, lightweight steel and other materials such as wire mesh, metal lath, gypsum Base materials such as lath board and lath cut plywood, gypsum board, calcium silicate board, fiber mixed 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 Ceramic siding board such as extrusion molded board, fiber mixed cement perlite board, PC board, A
Examples include a combination with a base material using an LC plate.

(2) As the iron material used in this basic structure, structural steel material can be usually used, but FR steel is more preferable. This FR steel has higher heat resistance characteristics than the conventional structural steel materials, and has a yield strength at 600 ° C of 2/3 or more of the yield strength at room temperature. Can be reduced.

(3) In the present application, the term "fireproof" such as a fireproof coating material and a fireproof paint means the fireproofness of a fireproof structure that is normally used and the meaning of quasifireproof in a quasifireproof structure. (4) Examples of the non-foaming fireproof coating material include:
However, it is not limited to this as long as the same function is exhibited. Cement mortar Perlite mortar, Vermiculite mortar Dry spray rockwool, Semi-dry spray rockwool Wet spray rockwool, Flint plaster spray material, Aluminum hydroxide-based spray material, Mortar mixed with wet foaming agent, Wet foaming mortar Cellulose Fiber-based spraying material Calcium silicate board, asbestos slate board, gypsum board,
Corrected as ceramic siding board, metal siding board, cement extrusion board, ALC board, PC board.

(5) The foamable refractory paint is a paint which forms a heat insulating layer having a heat insulating effect when it is exposed to high heat such as a fire. (6) As the foamable fireproof paint, for example, one containing the following binder, foaming agent, carbonized layer forming agent, etc. can be adopted, but it is not limited to this as long as it exhibits similar functions. Absent.

A) Binder (1) Alkyd resin Pure alkyd resin; Alkyd resin such as ultra-short oil, short oil, medium oil, long oil, ultra-long oil, etc. Modified alkyd resin; Rosin modified, phenol modified, epoxy modified, styrenated , Acrylated, urethane modified,
Alkyd resin such as silicone modified or amino resin modified Oil free alkyd resin; oil free, high molecular weight oil free, ultra-short oil, non-drying oil modified short oil, drying oil modified middle oil, drying oil modified long oil, drying oil modified ultra long Alkyd resins such as oil, rosin modified, phenol modified, epoxy modified, styrenated, acrylated, urethane modified, silicon modified, amino resin modified; cross-linking agents; 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 Cross-linking 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 acetate 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 Acid compound, metal dryer (5) Epoxy resin glycidyl ether type; bisphenol A type, bisphenol F type, phenol novolac type, epoxy resin + novolac 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 glycidyl amine type; aromatic amine type cycloaliphatic type self-emulsifying hydrophilic epoxy resin 1 part Modified Epoxy Resin ~ Epoxy Resin Hardener; Polymercaptan, Aliphatic Polyamine, Aromatic Polyamine, Polyamide, Tertiary Amine, Jetylaminopropylamine, Imidazole,
Tertiary amine salt, alicyclic amine, metal dryer (6) Polyurethane resin One-component polyurethane resin; Oil-modified polyurethane resin,
Lacquer type polyurethane resin Two-component polyurethane resin; Polyol curing type polyurethane resin (polyol type; acrylic polyol, polyester polyol, isocyanate prepolymer) curing agent; various isocyanates, polyisocyanates (7) unsaturated polyester resin and metal dryer crosslinking Agent (8) Phenol resin Resol type or novolac type curing agent; acid, alkali (9) NAD resin (acrylic non-aqueous emulsion) Acrylic resin dispersion with alkyd resin as dispersion stabilizer Alkylated melamine resin as dispersion stabilizer Acrylic resin dispersion (10) Synthetic resin emulsion vinyl acetate type; vinyl acetate resin emulsion, vinyl acetate copolymer resin emulsion, ethylene vinyl acetate vinyl copolymer resin emulsion, vinyl acetate vinyl acetate copolymer resin emulsion Veova type; vinegar Vibeova Copolymer Resin Emulsion, Veova Acrylic Copolymer Resin Emulsion; Here, Veova means vinyl versatate under the trade name of Shell Chemical Company. Acrylic system; various acrylic ester copolymer resin emulsions, self-crosslinking acrylic resin emulsions styrene acrylic system; styrene acrylic ester 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 acrylic 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- No. 175152 binder, one-component modified epoxy resin specified in JP-A-5-86310, alkali metal silicate (various water glasses), colloidal silica, hydraulic cement, calcined gypsum, etc. (1) to (1
4) Single and / or two or more combined use.

B) Foaming agent (1) Chlorinated paraffin (2) Nitrogen-containing compound type foaming agent: melamine, dicyandiamide, azodicarbimide, urea, melamine initial condensate,
Urea condensate, isocyanuric acid condensate, melamine resin powder, dicyandiamide phosphoric acid condensate, dicyandiamide resin, formaldehyde derivative, sorbit, mannitol, glycerin, trimethylolpropane, paraformaldehyde, hexamethylenetetramine, methylolated urea, methylolation 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 system; granular water glass, alkali metal silicate,
Alkali metal metasilicate, Japanese water water glass, hydrous alkali silicate powder (8) Foaming inorganic powder; Pearlite powder, Kuroko stone powder, Shirasu powder, Hiru stone powder, Aluminum phosphate, Aluminum hydroxide, Zeolite, Diatomaceous earth , Artificial heat-foamable inorganic substances (9)
Hydrogen carbonate; potassium hydrogen carbonate, sodium hydrogen carbonate 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 foaming agent (1) Phosphorus or phosphorus compounds; 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 additive (1) Foaming stabilizer; Carbides such as titanium, zirconium, chromium, boron, etc., nitrides, charcoal / nitride (2) Foaming stabilizer; flat talc , Flat mica (3) Foaming stabilizer; Silicon resin ultrafine powder 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 oxides, divalent or higher hydroxides (2) Coloring pigments; titanium oxide, red iron oxide, oak (3) lightweight aggregates; perlite, Firing stones, shirasu balloons, glass balloons, ceramic balloons, etc. h) Others (1) Paint additives; solvents, plasticizers, film-forming aids, thickeners (CMC, HEC, PVA, etc.), activators (anions) ,
(Nonion, cation, amphoteric type), dispersant, defoaming agent (2) flame retardant; halogen compound, organic halogen compound, antimony compound, organic phosphorus compound, ammonium sulfamate, guanylurea phosphate (7) Claim 4 As the mortar mixed with the composite lightweight aggregate, the following composition is used, for example.

It consists of hydraulic cement and a natural or artificial lightweight aggregate, and the natural or artificial lightweight aggregate is one or more of shirasu balloon, perlite, calcined vermiculite and glass balloon. It is composed of 0.05 to 5.0% by weight of the organic foam powder (or particles).
Examples of the organic foam include polystyrene foam, urethane foam, polyethylene foam, polypropylene foam, and the like. Further, this mortar contains aluminum hydroxide, calcium carbonate or re-emulsified powder resin, and the absolute dry specific gravity of the cured product of the mortar composition is 0.1.
Is about 1.8.

(8) The provisions of the Ministry of Construction Notification No. 2999 of 1-hour fireproof structure and 2-hour fireproof structure of the above-mentioned claim 5 relate to columns, beams, walls and floors, and as a 3-hour fireproof structure , Pillars and beams. Further, among the thicknesses of the layers in Table 1 above, those in the range of Table 2 below are more preferable because they have the required fire resistance performance and are advantageous in terms of workability and total cost.

[0028]

[Table 2]

(9) The intermediary intermediate coating layer according to claim 6 is a top coating for preventing uneven suction by applying the foaming fireproof coating to the non-foaming fireproof coating material layer. In order to prevent migration of alkali from the non-foaming fireproof coating material layer when the binder of the fireproof fireproof coating material is alkyd resin which is weak against alkali, or for the foaming fireproof coating material for the nonfoaming fireproof coating material layer Used to improve adhesion. This intermediate coating layer excludes the binders described in the detailed description of the foamable fire-resistant coating from those vulnerable to alkali such as ultra-short oil, short oil, medium oil and long oil alkyd resin. A single or a composite of two or more kinds of substances as a binder, a binder alone or a filler, an aggregate, a lightweight aggregate, an extender pigment, a coloring pigment, an organic fiber, an inorganic fiber, a thickener, a dispersant, Wetting agent, solvent,
Any of those with water added can be used. The amount of the intermediate coating composition used can be appropriately selected and used in the range of about 50 g to 3 kg / m ² . The thickness of the intermediate coating material layer is considered to be included in the thickness of the non-foaming fireproof coating material layer in Tables 1 and 2 above.

(10) Further, in the above-mentioned inventions of claims 1 to 8, a rust preventive paint or an alkali-sealable paint or a paint which is used as an alkali sealant is provided between the non-foaming fireproof coating material layer and the steel column or beam as the base. If necessary, an intermediary adhesion-improving paint or the like can be used within the range conventionally used as a base treatment. The thickness of the undercoat paint layer in this case is considered to be included in the thickness of the non-foaming fireproof coating material layer in Tables 1 and 2 above.

[0031]

The present invention has been conducted on the research of how to secure excellent fire resistance performance and reliability in an iron-based fireproof coating structure, and how to reduce the thickness of the fireproof layer and simplify the method. It is the result.

That is, for example, when a non-foaming fireproof coating material such as lightweight mortar is used, it has sufficient fireproof performance and reliability, but must be applied thickly.
When using a foamable fireproof coating, it may be applied thinly, but there is a problem in its reliability and the like, but there were advantages and disadvantages, but in the present invention, overcoming these drawbacks, sufficient fireproof performance and reliability. In addition, the coating film can be made thinner than before, and the method is remarkably simplified.

That is, in the invention of claim 1, the non-foaming fireproof coating material layer is provided on the surface side of the basic structure, and the foamable fireproof coating material layer is provided on the surface side of the nonfoaming fireproof coating material layer. Therefore, it is possible to reduce the thickness of the fireproof layer composed of both layers while ensuring sufficient fireproof performance. As will be apparent from the experimental examples described later, this exhibits a synergistic effect of (1 + 1) or more obtained by simply combining the non-foaming fireproof coating material layer and the foamable fireproof coating layer, and the fireproof layer combining both layers. Has better than expected fire resistance compared to its thickness.

According to the second aspect of the present invention, since the basic structure is a column or a beam made of steel frame, the fire resistance of the steel frame is improved even though the fire resistant layer can be made thin. In the invention of claim 3, since the basic structure is a wall or floor partially containing iron, the fire resistance of the wall or floor is improved even though the fire resistant layer can be made thin.

That is, as for the fireproof structure of the wall by the spraying method, the iron coating method, etc., conventionally, a combination of a light steel frame such as a runner and a stud + a lath net (or a fireproof board) + a non-foaming fireproof coating material was used. Furthermore, regarding the fire resistant structure of the floor by the spraying method, iron coating method, etc.,
The non-foaming fireproof coating material was sprayed onto the combination of concrete and deck plate to finish, but according to the present invention, these walls or floors are also called nonfoaming fireproof coating material layer and foamable fireproof coating material layer. By adopting the configuration, the fire resistance performance will be improved.

Regarding the judgment of the fire resistance test of the wall and floor, according to the regulations of the Ministry of Construction Notification No. 2999, in the case of a steel structure building, the maximum temperature of the wall and floor fire resistant structure is 500 ° C. In the following, harmful peeling and cracking deformation will not occur at an average temperature of 400 ° C. or less, but in the present invention, the standard is easily cleared.

For example, as an example of fireproofing a wall for two hours by spraying wet rock wool, individually designated "fireproof W2100"
In the case of "Tom Wet ATM-120", a coating thickness of 25 mm of wet rock wool spraying is required, but according to the present invention, lightweight mortar 10 to 15 mm + foamable fireproof paint 4.0 to 1.0 mm is sufficient, and For example, in the case of individually designated "fireproof F2083 Tomwet SF F-120" as an example of floor 2 hours fire resistance by wet rock wool spraying, a coating thickness of 15 mm wet rock wool spraying is required, but according to the present invention, Lightweight mortar 5-10
mm + foamable fireproof paint 3.0-1.0 mm. In addition, when thinning the non-foaming fire-resistant coating material, apply the foaming fire-resistant coating thickly, and conversely, when thickening the non-foaming fire-resistant coating material, apply the foaming fire-resistant coating thinly. The film thickness can be made thinner than that of the non-foaming fireproof coating material alone.

According to the invention of claim 4, the non-foaming fireproof coating material is a mortar mixed with a composite lightweight aggregate and has a composition containing organic foam powder or granules in its components.・ The cement ratio can be reduced to 40 at a time.
In addition to the advantage that it can be sprayed thickly up to about mm mm, the property that the strength of lightweight mortar rises quickly is added, making it the most suitable structure and its construction method in which foamable fireproof paint is combined as the second layer as in the present invention. It is suitable.

According to the fifth aspect of the present invention, the thickness of the non-foaming fireproof coating material layer and the foamable fireproof coating material layer is determined by the Ministry of Construction No. 2
According to the performance classification of the fireproof structure according to the fireproof test method specified in No. 999, the thickness is as shown in Table 1 above, so it exhibits excellent fireproof performance for 1, 2 and 3 hours even though the fireproof layer is thin. You can do it.

According to the sixth aspect of the present invention, by providing the intermediate coating material layer as an intermediary, the non-foaming fireproof coating material layer is mainly covered with the foamable fireproof coating material to prevent uneven suction and when the topcoat material is applied. It is possible to prevent migration of alkali when the binder of the foamable fire-resistant paint to be used is an alkyd resin or the like which is weak against alkali and to improve the adhesion of the foamable fire-resistant paint to the non-foaming fire-resistant coating material layer.

According to the invention of claim 7, the projected corner of the non-foaming fire-resistant coating material layer is chamfered in a curved or straight line, and the chamfered projected corner surface is processed. In addition, since the foamable fireproof paint layer is formed with a substantially uniform thickness with or without the intermediate coating paint layer, when foaming due to a fire, etc., the foamed heat insulating layer is uniformly non-foaming fireproof. Covering the outer corner of the coating layer, the fire resistance is uniform, and the certainty of fire resistance during a fire is improved. In other words, if the projected corner is finished in a right angle, for example, in the event of a fire, the foaming source of the foamable fireproof paint in the projected corner will be insufficient and it will be thin, cracked, or easily separated. In the invention, such an abnormality can be prevented because the foaming source is not insufficient.

According to the invention of claim 8, after the surface side of the basic structure is covered with the non-foaming fireproof coating material, the surface of the nonfoaming fireproof coating material is provided with or without the intermediate coating layer. Since the side is covered with the foamable fireproof paint, the fireproof layer composed of both layers can be formed very easily. For example, it is possible to form a fireproof layer having sufficient fireproof performance by simply applying a thin non-foaming fireproof coating material by a single application with a coating device, followed by drying and then applying a thin foamable fireproof coating material. In addition, the foamable fire-resistant coating material also serves as a base layer for the decorative layer or as a decorative layer itself.

[0043]

Preferred embodiments of the present invention will be described below in order to further clarify the structure and operation of the present invention described above. FIG. 1 is a perspective view showing a fireproof coating structure of an embodiment, and FIG. 2 is a sectional view thereof.

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

Although the fireproof layer 7 is thinner than the case where it is formed of the non-foaming fireproof coating material alone, it has a structure in which the foamable fireproof coating is applied to the surface of the nonfoaming fireproof coating material. In the event of a fire, the foamable fire-resistant paint layer 5 on the outermost surface foams to form a heat-insulating layer having a sufficient thickness, so that fire-resistant performance can be exhibited. Moreover, since the non-foaming fireproof coating material layer 3 that is not easily deteriorated by high heat is densely and firmly formed on the surface of the steel material 1, the nonfoaming fireproof coating material layer 3 also has sufficient fire resistance. There is a remarkable feature that the performance is exhibited and the functions of both layers 3 and 5 are combined so that the fireproofing effect can be reliably and sufficiently obtained in any case.

Further, since the refractory layer 7 of this embodiment is thinner than the conventional non-foaming refractory coating material alone, there is an effect that the space can be effectively used. Moreover, the surface of the foamable refractory paint is cosmetic in itself. In addition, since the surface accuracy is good as a makeup undercoat layer and it is generally easy to apply a paint such as paint, 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 By coloring it colorfully or as it blends into the surroundings,
You can easily improve the aesthetics.

Further, the foamable refractory paint becomes brittle once foamed, and there is a possibility that the heat insulation layer may fall off when another member comes into contact with the (foamed) heat insulation layer during a fire. In this example, since the non-foaming fireproof coating material layer 3 is densely and strongly formed on the surface of the steel material 1,
There is an advantage that the steel material 1 can be prevented from being directly exposed to fire, and in that respect as well, the stability and reliability of the fire resistance performance can be improved.

Further, in particular, as shown in an enlarged view in FIG. 2 (b), the (radius) is provided at the corner 11 of the non-foaming fireproof coating material layer 3 corresponding to the corner portion 9 of the steel material 1 of H-section steel. When the chamfering is performed in a curved shape (2 mm or more) or in a linear shape (2 mm or more in length), and the foamable refractory paint layer 5 is formed on the surface of the projected corner portion 11 with a substantially uniform thickness. , In case of fire,
There is an effect that the foaming source of the foamable fire-resistant paint layer 5 of the projecting corner portion 11 is not insufficient and is not thinned, cracked, or separated from the skin, and the fire resistance is further improved.

Further, for example, as shown in FIG. 3, the non-foaming fireproof coating material layer 2 corresponding to the corner portions 23 of the steel material 21 of square steel.
The chamfering similar to the above is performed on the projected corner portion 27 of No. 5 so that the foamable fire-resistant paint layer 29 covering the surface of the projected corner portion 27 is cracked or separated after foaming in the same manner when a fire occurs. And the effect of improving the fire resistance is obtained.

Next, an experimental example for confirming the effect of the present invention will be described. Incidentally, in the evaluation of the fire resistance performance described in the invention such as the conventional foamable fire resistant paint, the test method varies depending on the inventor, and depending on the test method, even if the film thickness is considerably thin, there is fire resistance. Although described,
Actually, it is not practical unless it is evaluated according to the fire resistance test specified in Ministry of Construction Notification No. 2999.
In this respect, the present inventors conducted rigorous testing and evaluation by the same method so as to be suitable for practical use. Therefore, the coating thickness of the foamable fireproof paint shown in the comparative example of the present invention is more practical than the coating thickness of the conventionally known foamable fireproof paint.

<Experimental Example 1> In Tables 3 to 7 below, the first layer (non-foaming fireproof coating material layer) and the comparative example (Comparative Examples 1 to 10) and The composition of the second layer (foamable fireproof paint layer), the thickness of the first layer and the second layer (coating thickness [mm]) are shown, and the performance of the fireproof layer obtained by conducting experiments such as fireproof performance is also shown. It was In addition, the numerical value showing the composition in the table means parts by weight. In addition, when the lightweight mortar was used for preparing the test body, it was applied after being kneaded with water.

Further, the test items and the evaluation of the performance are as follows. <Regarding Test Items and Criteria> (1) Fireproof Coating Workability It was judged that the work required for the fireproof coating work when coating to the required thickness for 1 hour fireproof performance was difficult.

◯: When performing necessary coating, the coating work is not restricted by deviation or sagging, and workability is good. Δ: When performing necessary coating, the coating work is somewhat limited due to displacement and sagging, and workability is somewhat poor.

X: When the necessary coating is applied, the coating work is restricted due to deviation or sagging, and the workability is poor. (2) Finished feel In the case of the "lightweight mortar + foamable fireproof paint" of the present invention, a lightweight mortar is ironed and then the foamable fireproof paint is sprayed to finish, and in the case of the "foamable fireproof paint" alone, the foamable fireproof paint In the case of the other comparative examples, the state of the finish after finishing by spraying with a trowel or by pressing with a trowel and then finishing was visually judged.

◯: The surface is smooth and dense, the color tone is uniform, and the design is excellent. Δ: The surface is smooth, but color unevenness occurs due to white sinter and the like, and the design is slightly inferior. X: The surface is porous and unsightly, and color unevenness occurs due to difference in density of spraying and white sinter, resulting in poor design. (3) Durability in normal environment Steel column (H300 x 300 x 10 x 15 mm, length 18
(00 mm) and then exposed indoors for judgment.

◯: No abnormalities such as peeling or discoloration due to exposure for half a year. △: Changes in chalking, white flower, etc. occur superficially on exposure for half a year. ×: Exposure to half a year causes surface changes such as chalking and white sinter, and further partial peeling. (4) Adhesiveness in normal environment After applying the predetermined coating shown in Examples and Comparative Examples for one month in a room in a normal environment, the adhesiveness in a standard state is 100 mm in length x 100 mm in width. Using the Kenken-type adhesion tester (LPT-
1500) and measured at three locations, 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) Cover layer retention after heating Steel column (H300 × 300 × 10 × 15 mm, length 18)
00mm), the test piece covered by Ministry of Construction No. 2999
According to the heating test method of the fire resistance test specified in No. 1, the fire resistance test was carried out for 1 hour, and the holding property of the fire resistant coating material layer was judged.

◯: There are no abnormalities such as peeling and cracking, which are considered to be harmful in fire resistance in the test, and are good. Δ: Partial or superficial peeling occurs in the test, which may be harmful in fire resistance. X: Peeling or cracking, which is considered to be harmful for fire resistance in the test, occurs. (6) Fire resistance performance H-shaped steel for column structure (H300 × 300 × 10 × 15 mm,
A test piece coated with a length of 1800 mm) is subjected to a heating test for 1 hour in accordance with the heating curve of the fire resistance test method for the building structure specified in Ministry of Construction Notification No. 2999, and the average peak temperature of 21 parts of the steel material It was judged by the value.

O: Average temperature of 21 points of steel material is 350 ° C. or lower Δ: Average temperature of 21 points of steel material is 351 ° C. to 450 ° C. × Average temperature of 21 points of steel material is 451 ° C. or higher

[0060]

[Table 3]

[0061]

[Table 4]

[0062]

[Table 5]

[0063]

[Table 6]

[0064]

[Table 7]

<Experimental Example 2> Further, in the following, the above-mentioned Example 1 is used.
25 to 25 and Comparative Examples 1 to 10, Examples 26 to 3
The configuration of No. 2 and the experimental results of the test items (1) to (6) are described.

This Experimental Example 2 is a combination of lightweight mortar + foamable fireproof coating material and the thickness thereof 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 of the second layer was 1.2 m.
When combined 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 of the second layer was 1.2 m.
When combined with m. (Example 28) Structure: In Example 11, the lightweight mortar as the first layer was 15 mm, and the thickness of the foamable fire-resistant paint of the second layer was 0.8.
When combined 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.
When combined with mm. (Example 30) Structure: In Example 2, the lightweight mortar as the first layer was 5 mm, and the thickness of the foamable fire-resistant paint of the second layer was 2.5 mm.
When combined with. (Example 31) Structure: In Example 7, the light-weight mortar as the first layer was 5 mm, and the thickness of the foamable fire-resistant paint of the second layer was 3.0 mm.
When combined 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.
When combined with m.

[0067]

[Table 8]

<Experimental Example 3> Further, in the following, Examples 33 to 33 will be described.
36, the configurations of Comparative Examples 11 to 14 and the experimental results thereof are described. In this Experimental Example 3, a combination of lightweight mortar and foamable fireproof paint was used, and the projected corner was chamfered in a curved or straight line. Incidentally, here, Comparative Examples 11 to 14
Is a comparative example with respect to the case where the projected corner is chamfered in a curved shape or a linear shape, and the composition and the layer thickness are within the range of the above-described embodiment. The evaluation is shown in Table 9 below. In this experiment, the above (1)
In addition to the test items of (6) to (6), the test item of (7) below was added. (7) State of Extruded Corner After Heating (Evaluation of Examples 33 to 36 and Comparative Examples 11 to 14) In the test of the coating layer retention after heating of the above test item (5), particularly the exposed corner It was observed and evaluated according to the following criteria.

◯: Similar to the flat portion, the exposed corner is almost uniform foaming, and there is no skin separation or peeling abnormality. Δ: Some skin separation occurs at the projected corner. ×: Abnormalities such as skin separation and peeling occur in the projected corner. (Example 33) Structure: In Example 1, after setting the lightweight mortar as the first layer to 10 mm and forming the curved corner of the projected corner portion to 2 mm, the thickness of the foamable refractory paint of the second layer was 2.0 mm. When finished with. (Example 34) Structure: In Example 6, after setting the lightweight mortar as the first layer to 10 mm and forming the curved corner of the projected corner portion to 2 mm, the thickness of the foamable refractory paint of the second layer was 2.0 mm. When finished with. (Example 35) Structure: In Example 6, after making the lightweight mortar as the first layer 10 mm and chamfering the projected corner portion in a linear shape of 2 mm, the thickness of the foamable refractory paint of the second layer was set to 2 When finished with 0.0 mm. (Example 36) Configuration: In Example 11, the lightweight mortar as the first layer was set to 10 mm, and the projected corner was chamfered linearly to 2 mm, and then the thickness of the foamable refractory paint of the second layer was set to 1 When finished with 0.5 mm. (Comparative Example 11) Structure: In Example 1, after setting the lightweight mortar as the first layer to 10 mm and making the projected corners at right angles, the thickness of the foamable refractory paint of the second layer was finished to be 2.0 mm. In addition to the evaluation of the corner of the case. (Comparative Example 12) Structure: In Example 11, the lightweight mortar as the first layer was set to 10 mm, the projected corner was made to be a right angle, and 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 of the case. (Comparative Example 13) Structure: In Comparative Example 2, the thickness of the foamable fireproof coating was 5.
The evaluation of the projected corner when finished with 0 mm. (Comparative Example 14) Configuration; in Comparative Example 6, the thickness of the foamable fireproof coating was 5.
The evaluation of the projected corner when finished with 0 mm.

[0070]

[Table 9]

<Experimental Example 4> In addition, the following Examples 37-
38, the structures of Comparative Examples 15 to 16 and the experimental results thereof are described. The evaluation is shown in Table 10 below. This Experimental Example 4 is a combination of a lightweight mortar and a foamable refractory paint, and includes test items (1) to
Among the items (6), the items (1) to (4) are similarly performed according to the experimental example 1, and the items subjected to the fire resistance test of the items (5) and (6) are subjected to a heating test for 2 hours based on the same method. Then, for the item (5), the retention of the coating layer after the test is evaluated, and (6)
For the item, the average temperature of the peak value of the steel material temperature is evaluated. 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 fireproof paint of the second layer was 3.
When finished with 0 mm. (Example 38) Structure: In Example 11, when the lightweight mortar as the first layer is 20 mm and the thickness of the foamable refractory paint of the second layer is 2.5 mm. (Comparative Example 15) Structure: In Comparative Example 2, the thickness of the foamable fireproof coating was set to 7.
When finished with 0 mm. (Comparative Example 16) Structure: In Comparative Example 6, the foamable fireproof coating has a thickness of 7.
When finished with 0 mm.

[0072]

[Table 10]

<Experimental Example 5> In addition, the following Examples 39 to
40, the structures of Comparative Examples 17 to 18 and the experimental results thereof are described. The evaluation is shown in Table 11 below. This Experimental Example 5 is a combination of a lightweight mortar and a foamable fireproof paint, and includes test items (1) to
Among the items (6), the items (1) to (4) are similarly performed according to the experimental example 1, and the items subjected to the fire resistance test of the items (5) and (6) are the heating test for 3 hours based on the same method. Then, for the item (5), the retention of the coating layer after the test is evaluated, and (6)
For the item, the average temperature of the peak value of the steel material temperature is evaluated. 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 fireproof paint of the second layer was 4.
When finished with 5 mm. (Example 40) Configuration: In Example 11, the lightweight mortar as the first layer is 20 mm, and the thickness of the foamable fireproof coating of the second layer is 4.5 mm. (Comparative Example 17) Structure: In Comparative Example 2, the thickness of the foamable fireproof coating is 1
When finished with 0.0 mm. (Comparative Example 18) Configuration; in Comparative Example 6, the thickness of the foamable fireproof coating is 1
When finished with 0.0 mm.

[0074]

[Table 11]

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

(8) Mediating Adhesiveness in Normal Environment After being coated on an iron plate according to a predetermined procedure for one month in a room in a normal environment, a cut is made in the measurement portion as shown in FIG. Then, the intermediary adhesiveness in the standard state was measured at three locations using a Kenken-type adhesion tester (LPT-1500) manufactured by Yamamoto Rakijuki Co., Ltd. using an attachment of 70 mm in length × 70 mm in width, and the average value was calculated. Indicated. (Example 41) In Example 1, a lightweight mortar was added to 9.5.
mm, and then air-dried, intermediate coating 1 of the following composition was applied 0.5 mm, and after drying, the foamable fireproof coating of Example 1 was further applied 2.0 mm and cured. Was subjected to the same test as the experimental example described above to evaluate its performance.

Intermediate coating 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; Taipaque R manufactured by Ishihara Sangyo Co., Ltd. -820 10.0 Calcium carbonate; Bihoku Powder Co., Ltd. Soflon 100 40.0 Dispersant; San Nopco Nopco Santo K 0.2 Wetting Agent; San Nopco Nopco Wet 50 0.2 Defoamer; San Nopco Nopco 8034L 0.1 Thickener; Shin-Etsu Chemical Co., Ltd. METOLOSE SM1500 0.2 (Example 42) In Example 17, light mortar was used.
After being coated with 0 mm and then air-dried, an intermediate coating composition 2 having the following composition was coated 1.0 mm, and after drying, the foamable fireproof coating composition of Example 17 was further coated with 2.0 mm and cured. Was subjected to the same test as the experimental example described above to evaluate its performance.

Intermediate coating 2 (% by weight) Binder A: Almatex Z115 20.0 Binder made by Mitsui Toatsu Chemicals Inc. Asano White Cement 40.0 Shirasu Balloon made by Nippon Cement Co., Ltd. Sanki made by Sanki Kogyo Co., Ltd. Light B03 10.0 Carbon fiber; Mitsubishi Kasei Co., Ltd. dialead fiber length 3 mm product 1.0 water; 28.3 dispersant; San Nopco Nopco Santo K 0.2 wetting agent; San Nopco Nopco Wet 50 0.2 extinguishing agent Foaming agent; San Nopco Nopco 8034L 0.1 thickener; Shin-Etsu Chemical Co., Ltd. Metroze SM1500 0.2 (Comparative Example 19) For the combination of Example 1, only the test item (8) was added, and the non- The interface between the foamable fireproof coating layer and the foamable fireproof coating layer was evaluated. (Comparative Example 20) Regarding the combination of Example 17, only the test item (8) was added, and the boundary surface between the non-foaming fireproof coating material layer and the foamable fireproof coating layer was evaluated.

[0079]

[Table 12]

Now, the materials used in the above experiment will be described in detail. <Raw materials> Portland cement; Nippon Cement Co., Ltd. ordinary Portland cement re-emulsified resin; Hoechst Synthetic company Movinyl DM-200 pearlite; Mitsui Mining & Smelting Co., Ltd. Mitsui pearlite C calcined flint stone; Hibo Corp. Hircon No. 2 Dolomite plaster; JIS A 6903 Topcoat-compatible product Calcium carbonate; Soflon 1000 methylcellulose manufactured by Bihoku Kogaku Co., Ltd .; Shin-Etsu Chemical Co., Ltd., Metroses SM1500 alkali-resistant glass fiber; Nitto Boseki CSV13P
B800 Styrofoam granules; average particle diameter 1.2 mm, bulk specific gravity 0.067 Shirasu balloon; Sankilite B03 aluminum hydroxide manufactured by Sanki Kogyo Co., Ltd., Heidilite H-10 bentonite manufactured by Showa Denko KK, Kunigel VS carbon fiber manufactured by Kunimine Industries Co., Ltd. Mitsubishi Kasei DIAREAD K661 fiber length 10mm silica sand; silica sand No. 6 resin binder 1; binding component by acrylic resin emulsion; resin solid component by Mohvinyl Synthetic Mowinyl 747 resin binder 2; binding component by polyol mixture and isocyanate 72 castor oil made by Ito Oil Co., Ltd.
Mitsui in a mixture of 19 parts by weight of ADEKA RESIN 6060 manufactured by Asahi Denka Co., Ltd., 8 parts by weight of 3,3′-dichloro 4,4′-diaminophenylmethane and 1 part by weight of 4,4′-methylenedianiline. Isocyanate CR made by Toatsu Chemical Co., Ltd.
200, the proportion of the polyol mixture and the isocyanate used was selected such that the ratio of the total moles of the isocyanate groups to the total moles of the hydroxyl groups and amino groups of the polyol mixture was 1. Resin binder 3; Epoxy resin and its curing agent as a binding component; 100 parts by weight of Evolution EA1 manufactured by Kanebo UNC Co., Ltd. and 8 parts of Evolution EB1 manufactured by Kanebo
Resin solid component with binder used in a proportion of 0 parts by weight Resin binder 4; Vinyl chloride vinyl acetate copolymer resin binder component; Resin solid component with Mobile 190E manufactured by Hoechst Synthetic Co., Ltd. Resin binder 5; Salt rubber resin Binding component;
Asahi Denka Co., Ltd. Adeka chlorinated rubber resin CR-5 was used as a plasticizer in 60 parts by weight of chlorine para 70 as a plasticizer and a resin solid component by a binder Melamine resin powder; Mitsui Toatsu Kagaku Co., Ltd. Melmite powder Expansion Graphite: Chuetsu Graphite Industry Co., Ltd. Expanded graphite SMF Phosphorus compound: Hoechst Japan EX
OLIT462 (microencapsulated ammonium polyphosphate) Flat mica fine powder; Kuraray Szolite Mica 200S granular water glass; Na ₂ O: SiO ₂ = 1: 3.
Granular water glass with a composition of 9 (molar ratio) (particle size 0.8 mm)
Glass fiber treated with calcium stearate to make it water resistant; glass fiber manufactured by Nitto Boseki Co., Ltd., glass fiber length 3 mm; silicon carbide fine powder; silicon carbide fine powder manufactured by Tokai Carbon Co., Ltd. titanium white; Taipaque R manufactured by Ishihara Sangyo Co., Ltd.
-820 Shirasu powder; Shirasu powder 200 mesh product manufactured by Idiji Kasei Co., Ltd. Pearlstone powder; Pearlstone crushed 200 mesh product manufactured by Mitsui Kinzoku Kogyo Co., Ltd. It is suitable because it has excellent performance in terms of finish feeling, durability in normal environment, adhesion in normal environment, coating layer retention after heating, and fire resistance. In particular, a curved or straight chamfered corner portion is more preferable because the corner portion after heating is excellent. On the other hand, none of the comparative examples are excellent in all respects, which is not always preferable. Since the above Comparative Examples 11 to 12 are comparative examples in which the projected corner is chamfered in a curved shape or a linear shape, the overall fire resistance performance is excellent. Also,
It is clear that the one having the intermediate coating layer has excellent adhesiveness.

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

[0082]

As described in detail above, according to the invention of claim 1, the non-foaming fireproof coating material layer is provided on the surface side of the basic structure and the nonfoaming fireproof coating material layer is provided on the surface side. Since the foamable fireproof coating layer is provided, the thickness of the fireproof layer composed of both layers can be reduced while sufficiently ensuring the fireproof performance. This exerts a synergistic effect more than simply combining the non-foaming fireproof coating layer and the foamable fireproof coating layer.
In addition, it is possible to combine surface cosmetic properties, which is economically advantageous.

According to the second aspect of the present invention, since the non-foaming fireproof coating material layer and the foaming fireproof paint layer are provided on the surface of the steel structure of the pillar or the beam, the fireproof layer composed of both layers can be made thin. Nevertheless, the fire resistance performance for steel frames is improved. In the invention of claim 3, since the non-foaming fireproof coating material layer and the foaming fireproof paint layer are provided on the surface of the basic structure containing iron in a part of the wall or floor, the fireproof layer composed of both layers can be made thin. Nevertheless, the fire resistance performance for walls or floors is improved.

According to the invention of claim 4, since the non-foaming fireproof coating material is a mortar mixed with a composite lightweight aggregate and has a composition containing organic foam powder or granules in its components, the water content thereof during construction is reduced.・ The cement ratio can be reduced to 40 at a time.
In addition to the advantage that it can be sprayed thickly up to about mm mm, the property that the strength of lightweight mortar rises quickly is added, making it the most suitable structure and its construction method in which foamable fireproof paint is combined as the second layer as in the present invention. It is suitable.

According to the invention of claim 5, the thickness of the non-foaming fireproof coating material layer and the foamable fireproof coating material layer is determined by the Ministry of Construction No. 2
According to the performance classification of the fireproof structure according to the fireproof test method specified in No. 999, the thickness is as shown in Table 1 above, so it exhibits excellent fireproof performance for 1, 2 and 3 hours even though the fireproof layer is thin. it can.

According to the invention of claim 6, the non-foaming fireproof coating material layer is mainly covered with the foamable fireproof coating material to prevent uneven suction, and the binder of the foamable fireproof coating material to be the top coat is alkali. It is effective in preventing migration of alkali when a weak alkyd resin or the like is used and improving the adhesion of the foamable fireproof coating to the nonfoaming fireproof coating material layer.

According to the invention of claim 7, the projected corner of the non-foaming fire-resistant coating material layer is chamfered in a curved shape or in a linear shape, with or without the intermediate coating material layer. Since the foamable fireproof paint layer is formed on the surface of the projecting corner with a substantially uniform thickness, in the event of a fire, the foaming source of the foamable fireproof coating in the projecting corner becomes insufficient and becomes thin or cracked. It does not cause skin separation, and can reliably demonstrate fire resistance.

In the invention of claim 8, after covering the surface side of the basic structure with the non-foaming fireproof coating material, the surface side of the nonfoaming fireproof coating material is provided with or without the intermediate coating layer. Since the foamed refractory paint is covered, the fireproof layer composed of both layers can be easily formed by an extremely simple operation. Also, new makeup painting can be omitted.

[Brief description of drawings]

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

2A and 2B show a fireproof coating structure of H-section steel, in which FIG. 2A is a sectional view thereof, 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 of measuring adhesiveness.

[Explanation of symbols]

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

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 000251277 Suzuka Fine Co., Ltd. 1 Shiohama-cho, Yokkaichi-shi, Mie (71) Applicant 592067395 Nippon Kasei Co., Ltd. 7-21-1 Nishishinjuku, Shinjuku-ku, Tokyo (71) Applicant 394003667 Nippon Plaster Co., Ltd.7-8, Miyashita-cho, Kuzuu-cho, Ansu-gun, Tochigi Prefecture (71) Applicant 390025612 Fujikawa Kenzai Kogyo Co., Ltd. 13-13, Torihama-cho, Kanazawa-ku, Yokohama-shi, Kanagawa (71) Applicant 000174932 Mitsui Metal Paint Chemistry 2-1-1 Nihombashi Muromachi, Chuo-ku, Tokyo (72) Inventor Yoshihiro Takao 2-4-2 Daisaku, Sakura City, Chiba Prefecture Onoda Development Research Institute (72) Inventor Terugo Inoue Tokyo Ota 1-9-13 Kita-Momoya-ku, Kokuwa Chemical Engineering Co., Ltd. Technical Research Institute (72) Inventor Tokuju Tokuju Gifu Prefecture 2-457 Matsumoto-cho, Hara-shi Kikusui Chemical Industry Co., Ltd.Technology Development Department (72) Inventor Takemi Yada Ichiban Shiohama-cho, Yokkaichi-shi, Mie Suzuka Fine Co., Ltd. Technical Headquarters (72) Inventor Takashi Moriwaki Namerikawa, Hiki-gun, Saitama Prefecture Municipal capital 25-11 Miyako Nihon Kasei Co., Ltd. Central Research Laboratory (72) Inventor Kuniyuki Okuyama 7-8 Miyashita-cho, Kuzuu-cho, Ansu-gun, Tochigi Prefecture Japan Plaster Co., Ltd. (72) Inventor Susumu Harada Yokohama-shi, Kanagawa 13 Torihama-cho, Kanazawa-ku Fujikawa Kenzai Kogyo Co., Ltd. Technical Department (72) Inventor Kozo Tabata 3-7-1 Nishiura, Funabashi City, Chiba Mitsui Kinzoku Paint Chemical Co., Ltd.

Claims (8)

[Claims] 1. A basic structure in which iron is partially or wholly used, a non-foaming fireproof coating layer provided on the surface side of the basic structure, and a surface side of the nonfoaming fireproof coating layer. And a foamable fireproof coating layer provided thereon. 2. The hybrid fireproof coating structure according to claim 1, wherein the basic structure is a steel frame column or beam. 3. The hybrid fireproof coating structure according to claim 1, wherein the basic structure is a wall or floor partially containing iron. 4. The non-foaming fireproof coating material is a mortar mixed with a lightweight composite aggregate, and contains organic foam powder or granules in its components. Hybrid fireproof coating structure. 5. The thicknesses of the non-foaming fireproof coating material layer and the foamable fireproof coating layer are shown in Table 1 below according to the performance classification of the fireproof structure according to the fireproof test method prescribed in Ministry of Construction Notification No. 2999. Hybrid fireproof coating structure according to any one of claims 1 to 4, characterized in that [Table 1] 6. The basic structure according to any one of claims 1 to 5, wherein the basic structure has an intermediate coating material layer as an intermediate between the non-foaming fireproof coating material layer and the foamable fireproof coating material layer. Or the hybrid fireproof coating structure described above. 7. The chamfered curved or linear chamfer is formed on the projecting corner of the non-foaming fireproof coating material layer covering the corner of the basic structure, and the chamfered projecting corner surface is formed. The foamable fireproof coating layer is formed to have a substantially uniform thickness with or without the intermediate coating layer interposed therebetween.
7. The hybrid fireproof coating structure according to any one of 1 to 6. 8. The non-foaming fire resistant material is covered with a non-foaming fire resistant coating material on the surface side of a basic structure partially or entirely made of iron, and then with or without the intermediate coating layer. A hybrid fireproof coating method characterized in that the surface side of the coating material is covered with a foamable fireproof paint.