KR101647070B1 - Heat-expandable Filler for Fireproof Filling Structure and Method for Manufaturing the Same - Google Patents

Abstract

The present invention is characterized in that a space between a through hole and a penetrating member is sealed when a penetrating member such as a pipe is installed in a through hole provided in a floor or a wall of a building and a thermally expandable filler which expands by heat is provided inside, The present invention relates to a refractory filling structure capable of preventing flames and noxious gas from moving through a through hole and a pipe while expanding, and a refractory filling structure and a method of constructing the refractory filling structure. The refractory filling structure according to the present invention comprises an inner circumferential surface of a through- And a thermally expandable filler which is installed in a space between the pipes passing through the through hole and which shields a space between the inner circumferential surface of the through hole and the pipe while expanding by heat in the event of a fire; The thermally expandable filler comprising an A liquid containing an isocyanate; Characterized in that it is made by mixing and reacting polyol, expandable graphite, and liquid B containing sugar caramel or sugar silica caramel.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a fireproof filling structure,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refractory filling structure applied to a piping construction site of a building, and more particularly to a refractory filling structure applied to a piping construction site of a building, The present invention relates to a fireproof filling structure and a method of constructing the fireproof filling structure, which can prevent a flame and a noxious gas from moving through a through hole and a pipe while expanding a thermally expandable filler during a fire.

Generally, a pipe passing through an arcing partition such as a floor or a wall of a building is constructed by inserting a pipe into a through hole formed in an arcing partition, filling a space between the pipe and the through hole with a refractory filling structure, Blocks flames or noxious gases from moving through through holes or piping.

The conventional refractory filling structure has a structure in which a metal case is filled with glass or a heat insulating material such as refractory mortar, silicone or urethane.

However, in the conventional refractory filling structure, since the heat insulating material is burned or burned due to the high temperature and high heat in the fire, a space is formed between the pipe and the through hole to allow flame and noxious gas to pass therethrough. There is a problem that can not be satisfied.

In order to solve such a problem, Patent Publication No. 2012-0133538 discloses a method of filling a gap damaged by a flame due to expansion characteristics of a thermal expansion tape even when a heat insulating cover and a one-pack type polyurethane filler are burned due to high temperature and high heat in a fire, A refractory filling structure capable of effectively blocking the penetration portion of a building and preventing the diffusion of fire is disclosed.

However, the refractory filling structure disclosed in the above patent publication has disadvantages in that the foaming layer is not firmly bonded after the foaming of the thermal expansion tape and is scattered and can not maintain its shape, thereby lowering the heat shielding performance.

Open Patent Publication No. 2012-0133538 (Published on December 11, 2012) "Method for forming a refractory filling structure on a metal pipe for penetrating part of a building"

Disclosure of the Invention The present invention has been proposed in order to overcome the above-mentioned problems of the prior art, and an object of the present invention is to provide a method for mixing and reacting liquid A of isocyanate system and liquid B containing expanded graphite, sugar caramel or sugar- The present invention also provides a refractory filling structure having excellent fire resistance and heat resistance, and a method of constructing the refractory filling structure, which can form a heat insulating layer automatically after a fire in a fire, maintain foaming without being scattered after foaming.

In order to accomplish the above object, the refractory filling structure according to the present invention is installed in a space between an inner circumferential surface of a through hole formed to penetrate a building structure and a pipe passing through the through hole, And a heat-expandable filler for shielding a space between the inner circumferential surface of the pipe and the pipe; The thermally expandable filler comprising an A liquid containing an isocyanate; Characterized in that it is made by mixing and reacting polyol, expandable graphite, and liquid B containing sugar caramel or sugar silica caramel.

One embodiment of the method for constructing the refractory filling structure according to the present invention as described above includes the steps of: preparing a liquid B by mixing polyol, expanded graphite, and carnauba or carnauba sugar caramel; Injecting the prepared liquid B and the liquid A containing isocyanate into a mold and mixing them to prepare a solidified tubular thermally expandable filler; And placing the thermally expandable filler in a space between the through hole and the piping of the building structure.

Another embodiment of the method for constructing the refractory filling structure according to the present invention as described above comprises the steps of: preparing a liquid B by mixing a polyol, expanded graphite, and carna- phy or car- bon silica caramel; Closing the lower end of the space between the through-hole and the piping of the building structure; And injecting the prepared liquid B and the liquid A containing isocyanate into the through-hole, mixing and reacting the liquid to form a thermally expandable filler.

According to the present invention, a thermally expandable filler formed by mixing and reacting an isocyanate-based liquid A and a liquid B with expanded graphite, sugar caramel or sugar silica caramel is placed between the pipe and the through-hole of the building structure In the event of a fire, it is automatically fired by heat, which completely blocks the pipe and the through-hole.

In particular, the thermally expandable filler formed in the refractory filler structure of the present invention contains expanded graphite, caramelized sugar or caramelized sugar caramel, and has an effect of maintaining the foamed form without scattering due to plume pressure or wind pressure during expansion. Has a high expansion ratio and has a hard carbon film, which can block the toxic gas and has an excellent heat-shielding performance.

1 is a sectional view of a refractory filling structure according to an embodiment of the present invention.
2 is a perspective view of a thermally expandable filler constructed in the refractory filling structure of FIG.
3 is a cross-sectional view of a refractory filling structure according to another embodiment of the present invention.
4A is a cross-sectional view of a refractory filling structure according to another embodiment of the present invention.
4B is a perspective view illustrating the shape of a pedestal configured in the refractory filling structure of FIG. 4A.
5 is a diagram showing the molecular formula of sugar.
6 is a flowchart illustrating a method of constructing a refractory filling structure according to an embodiment of the present invention.
FIGS. 7A and 7B are enlarged views showing the state before expansion and the state after expansion, respectively, of expanded graphite according to an embodiment of the present invention.
8 is a flowchart illustrating a method of constructing a refractory filling structure according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the accompanying drawings, preferred embodiments of a refractory filling structure and a construction method thereof according to the present invention will be described in detail.

The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention, and are actually shown in a smaller scale than the actual dimensions in order to understand the schematic structure.

1, a refractory filling structure according to an embodiment of the present invention includes a charging case 10 installed inside a through hole 2 formed to penetrate a building structure 1 such as a building floor or a wall, A thermally expandable filler 30 which is filled in the upper side of the inside of the charging case 10 and expands by heat and a thermally expandable filler 30 which is filled in the lower side of the inside of the charging case 10 And an upper lid member 40 coupled to an upper portion of the charging case 10 to close the upper portion of the charging case 10.

The charging case 10 is a cylinder made of a heat resistant metal material or a nonflammable or flame-retardant fiber-reinforced plastic (FRP).

The heat insulating material 20 may be made of cerach wool or glass wool. In this embodiment, the heat insulating material 20 is formed on the lower portion of the charging case 10, but on the contrary, it may be disposed on the upper portion of the charging case 10 and the thermally expandable filler 30 may be disposed thereunder.

3 and 4A, the filling case 10 may be filled with the thermally expandable filler 30 only if the heat insulating material 20 is not used at all.

The thermally expandable filler (13) is characterized by having expandability by adding expanded graphite and sugar silica caramel while using isocyanate and polyol, and enhancing fire resistance by imparting an effect of preventing mold collapse. More specifically, the thermally expandable filler (13) is a liquid filler prepared by reacting liquid A and liquid B at a predetermined ratio, wherein liquid A is an isocyanate system, liquid B is a mixture of expanded graphite and sugar phosphate Caramel or sugar silica caramel. When mixed with A solution and B solution, the primary expansion occurs. When the high temperature heat is applied, the secondary expansion occurs.

The thermally expandable filler 13 made by mixing the liquid A and the liquid B has adhesiveness and thermal expansion and forms a separate marsh char (char-shaped soot) so that expanded graphite fired by heat does not scatter , While maintaining the adiabatic and heat-shielding effect, while suppressing the flammability of the medium (adhesive or substrate) and allowing the medium to become part of Char.

More specifically, the thermally expandable filler 13 has the property that expanded graphite is added to expand expanded graphite upon contact with heat. The foam layer formed by the expanded graphite can maintain the best effect by keeping the foam form without scattering by the plume pressure or the wind pressure of the fire. To prevent such collapse, it is necessary to prevent the collapse of the mold. For this purpose, in the present invention, by using the mucilage of caramelized sugar caramel or caramelized sugar, it is possible to prevent the scattering of the foamed graphite and to suppress the combustion. Respectively.

As shown in FIG. 2, the thermally expandable filler 30 has an inner diameter substantially equal to the diameter of the pipe 3, has a cylindrical shape in which the upper surface and the lower surface are opened, and is easily inserted into the pipe 3 The slit 31 is formed to be cut at one side.

The thermally expandable filler 30 is prepared by solidifying the mixture of the isocyanate type A liquid, the polyol, the expanded graphite, the B liquid mixed with the caramel sugar or the silica caramel in a mold, And the pipe (3).

However, when the solution A and the solution B are directly injected into the space between the charging case 10 and the pipe 3 and mixed and reacted, the thermal expansion filler 30 is solidified while expanding by a certain volume, And the pipe 3, as shown in Fig.

When the liquid A and the liquid B constituting the thermally expandable filler 30 are poured into the case 10, the liquid A and the liquid B flow into the space between the lower opening of the case 10 and the pipe 3 It is preferable that the pedestal 50 is hermetically coupled to the lower end of the charging case 10 to prevent leakage of the liquid.

The pedestal 50 is formed in a cylindrical shape with a coupling hole 51 to be fitted in the pipe 3 at the center and a flange 52 at a lower end to seal the lower opening of the charging case 10, A slit 53 is formed at one side so as to be easily inserted into the pipe 3. The pedestal 50 may be made of a synthetic resin material, but may be made of the same component as that of the thermally expandable filler 30 to form another thermally expandable filler 30.

As described above, the liquid B of the thermally expandable filler 30 may be prepared by mixing sugar caramel or sugar caramel using the sugar phosphoric acid decomposition reaction. First, a method of preparing the mixture by mixing caramel sugar .

First, in the sugar phosphatization reaction used in the present invention, sugar generally corresponds to? -D-glucopyranosyl-? -D-fructofranoside and is a sweet, non-reducing disaccharide. Originally, it is contained in a large amount in sugar cane. What is obtained from sugar beet is called 柑 菜 sugar, and it is found in all plants that have photosynthesis ability. In the present invention, sugar which is generally produced is used.

5 is a molecular diagram of sugar.

Sugar is usually a disaccharide whose molecular formula is C ₁₂ H ₂₂ O ₁₁ , and the decomposition of sugar by heat is as follows:

The fact that a large amount of water is released by the above formula (1) is a special characteristic of the decomposition of sugar. Such sugar is environmentally harmless, easily biodegrades even when buried, and has no merit that no harmful gas is produced at the time of combustion.

On the other hand, when the sugar is hydrolyzed with dilute acid or? -D-fructosidase (sucrose, also referred to as invertase), an equivalent mixture of D-glucose and D-fructose (nonlinearity [α] D = -20 ° ), And the optical intensity is reversed to the left in the first place. This reaction is called telephone, and the mixed party is called telephone party. Sugar is also hydrolyzed to glucose and fructose by maltase III or IV in the mucosa cells. Some species of bacteria (Pseudomonas saccharophila, Leuconostoc mesen-teroides, etc.) have a sugar phosphatase degradation that decomposes sugar into α-D-glucose-1-phosphate and D-fructose in the presence of phosphoric acid. On the other hand, glycosylation of UDP-glucose to D-fructose or D-fructose-6-phosphate is known as an enzyme reaction for making sugar. Although the former is catalyzed by sugar synthase (EC 2.4.1.13), it is physiologically more likely to act for the decomposition direction, ie, UDP-glucose supply, while the latter is responsible for sugar synthesis (SPS, EC 2.4.1.14). ≪ / RTI > The product, sugar phosphate, is converted to sugar by the irreversible dephosphorylation of phosphatase.

Cyanophilic acid means a reaction in which phosphoric acid is added to a molecule to decompose it. The enzyme that catalyzes this R1-R2 + H3PO4 R1-OPO3H2 + R2H reaction is collectively referred to as choline acidolytic enzyme, and glycogen phosphatase is representative. In the present invention, choline acidolytic enzymes are widely known in the industry by using choline acid decomposition of sugar, so they are not separately described in the present invention.

A method of manufacturing a thermo-expansive filler 30 by mixing the caramelized sugar caramel produced using the above-described choline acid decomposition reaction, and constructing a refractory filler structure will be described with reference to FIG.

First, 100 parts by weight of disaccharide sugar is mixed with 20 to 70 parts by weight of phosphoric acid and reacted (step S1). This makes use of the above-mentioned sugar phosphoric acid decomposition reaction, and dark brown sugar caramel phosphate is formed as a final product thereof. Sucrose phosphate is a form of sugar 6-phosphate, and Sucrose-Phosphate Synthase is used as an enzyme to catalyze this reaction. The sugar 6-phosphoric acid, which is the product of the above, is amorphous and takes the form of caramel of unknown structure. When the sugar and phosphoric acid are mixed and reacted, aging may be required depending on the catalytic enzyme to be used.

On the other hand, in order to maintain the foaming form due to the expanded graphite to be described later, it is necessary to prevent the mold collapse. That is, caramelized sugar caramel is excellent in mucilage, so it exhibits a dual effect of preventing scattering of foamed graphite and suppressing combustion.

In this reaction, stabilizers or reaction accelerators may be added as other additives.

The foam stabilizer improves the emulsification action (facilitates the mixing of the raw materials) and the cell growth promotion (grows the bubbles, lowers the pressure difference between the bubbles, prevents gas diffusion, ), Stabilization of the cell membrane (prevention of problems such as cell destruction, coalescence and thinning of the cell membrane due to bubble destabilization at elevated viscosity) and added for product density uniformity.

Secondly, expanded graphite and a dispersant are added to the caramelized sugar phosphate, diluted and stirred to prepare a liquid B (Step S2). At this time, 200 to 800 parts by weight of a urethane polyol is diluted with 100 parts by weight of caramelized sugar caramel and stirred. As the dispersing agent, a nonionic surfactant such as an ethylene oxide addition type surfactant can be used.

Here, the polyol for urethane generally includes initiators such as multifuntional alcohols or aromatic amines having two or more hydroxyl groups (-OH) or amine groups (Amine Group, -NH 2) in the molecule, and initiators such as propylene Oxide, PO) or ethylene oxide (EO) under appropriate conditions. Generally, polyols are classified into polyether polyols and polyester polyols. In the present invention, the polyols can be appropriately selected depending on the application.

Here, expandable graphite means that natural graphite is subjected to chemical treatment to form an intercalation compound of graphite. When such a compound is heated, it expands together with the chemical component to form a kind of film. When the styrofoam or urethane containing expanded graphite receives heat, that is, when a fire occurs, the expanded film acts as a protective film, . The foam layer formed by the expanded graphite does not scatter due to the plume pressure or the wind pressure of the fire but the foam form is maintained.

Figs. 7A and 7B are enlarged views showing the state before expansion and the state after expansion, respectively, of the expanded graphite. Expanded graphite, also known as soft graphite, is widely used in industry, so a detailed description is not given here.

On the other hand, a solution prepared by mixing solid sodium octaborate tetrahydrate with colloidal meta silicate is added to the second step (step S2) to reinforce the flame retardancy. This sodium octaborate solution plays a role in suppressing the combustion of the combustible base material and helping the formation of Char when the adhesive component or the combustion component is mixed.

In the formation of the sodium octaborate solution, 10 to 40 parts by weight of the colloidal meta-silicate is mixed with 100 parts by weight of sodium octaborate. When the sodium octaborate solution thus produced is mixed with caramelized sugar, 10 to 50 parts by weight of sodium silicate solution is added to 100 parts by weight of caramelized sugar caramel.

At this time, petroleum or vaseline may be added to maintain the viscosity of the liquid B.

Thirdly, the liquid B, which is made of a mixture of the sugar caramel phosphate and the polyol for urethane, and the liquid A containing isocyanate as a main component are injected into the mold, mixed and reacted to prepare a solidified thermally expandable filler 30 (step S3) . In this Example, the liquid A used was methylene diphenyl diisocyanate (MDI) as an isocyanate. Here, methylene diphenyl diisocyanate (MDI) is an aromatic diisocyanate chemical substance. The methylene diphenyl diisocyanate is largely divided into MDI monomer and polymeric MDI. The MDI monomer is composed of three isomers of 2,2'-MDI, 2,4'-MDI and 4,4'-MDI, , One of the three isomers or a mixture thereof is selected to be suitable for the purpose.

Fourthly, the charging case 10 and the pipe 3 are provided in the through hole 2 of the building structure, and the thermally expandable filler 30 is installed between the inner peripheral surface of the charging case 10 and the pipe 3 (Step S4). In this case, only the thermally expandable filler 30 may be installed between the charging case 10 and the pipe 3 (see FIG. 3), and the heat insulating material 20 may be provided between the charging case 10 and the pipe 3, (See Fig. 1).

Then, when the upper lid member 40 is fastened at the upper part of the charging case 10, the refractory filling structure is completed.

In the meantime, in the above-described embodiment, the liquid A and the liquid B are injected into an external mold and reacted to produce a solidified thermally expandable filler 30. Then, the thermally expandable filler 30 is injected into the filler case 10, Respectively.

However, as shown in another embodiment in Fig. 8, after the liquid B is prepared, the liquid A and the liquid B are immediately injected into the case 10, mixed and reacted to construct the thermally expandable filler 30 It might be. In this case, a pedestal 50 (see Figs. 4A and 4B) is provided at the lower portion of the charging case 10 before the liquid B and the liquid B are injected into the charging case 10, So as to prevent leakage of the liquid.

Since the thermally expandable filler 13 formed in the refractory filling structure of the present invention has an adhesive force, it can be attached directly to the pipe 3 and provides the effect of screening and heat shielding while expanding in case of fire, To function as a semi-incombustible structure.

On the other hand, in the above-mentioned embodiment, when the liquid B of the thermally expandable filler (30) was produced, caramel sugar phosphate was added using polyol and expanded graphite in the presence of sucrose phosphoric acid decomposition reaction. Alternatively, The liquid B of the filler 30 may be prepared.

The sugar silica caramel is prepared by adding 50 to 80 parts by weight of sugar relative to 100 parts by weight of colloidal silica.

Then, 15 to 30 parts by weight of caramelized sugar silica and 20 to 50 parts by weight of expanded graphite are added to 100 parts by weight of a polyol having a molecular weight of 1000 g / mol to 3000 g / mol, and stirred to prepare liquid B of the thermally expandable filler (30).

At this time, a surfactant, a solvent, a flame retardant, a catalyst, and an auxiliary agent are added to the mixture of the polyol and the sugar silica caramel and the expanded graphite, and the mixture is stirred to complete the liquid B. At this time, when mixing the sugar silica caramel and the expanded graphite, sodium octaborate tetrahydrate in a solid form may be added to the colloidal meta-silicate to form a sodium octaborate solution. In forming the sodium octaborate solution, 10 to 40 parts by weight of a colloidal-type meta-silicate is preferably mixed with 100 parts by weight of sodium octaborate.

Further, in the step of preparing the liquid B, at least one of petroleum or petrolatum may be further added to maintain the viscosity of the liquid B.

The method of manufacturing the thermally expandable filler 30 by mixing the liquid B and the liquid A of the isocyanate system and installing the liquid in the filling case 10 is the same as described above.

That is, the liquid A and the liquid B are mixed in the mold to produce a solidified thermally expandable filler 30, and then the thermally expandable filler 30 is placed in the filling case 10, or the liquid A and the liquid B are immediately filled The refractory filling structure can be constructed by a method of injecting the thermally expandable filler 30 into the case 10 and reacting the same.

The refractory filling structure of the present invention thus constructed has a structure in which the thermally expandable filler 13 is foamed by heat at the time of fire and filled at a high density in a space between the case 10 and the pipe 3, In this case, due to the excellent toughness of the caramelized sugar or the silica-based caramel added to the liquid B of the thermally expandable filler (13), the scattering of the expanded graphite is prevented, It will exhibit excellent decalcification and heat differential performance.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is clear that the present invention can be suitably modified and applied in the same manner. Therefore, the above description does not limit the scope of the present invention, which is defined by the limitations of the following claims.

1: Building structure 2: Through hole
3: Piping 10: Charging case
20: Insulation material 30: Thermally expandable filler
31: slit 40: upper cover member
50: Stand

Claims (20)

(2) and a pipe (3) passing through the through hole (2), and is expanded by heat in the event of a fire, so that the inner peripheral surface of the through hole (2) (30) which shields the space between the first and second electrodes (3);
The thermally expandable filler (30) comprises an A liquid containing an isocyanate; Characterized in that the refractory filler structure is made by mixing and reacting a polyol, expandable graphite, and liquid B containing sugar caramel or sugar silica caramel. The refractory filling structure according to claim 1, wherein the thermally expandable filler (30) has a slit (31) through which a pipe (3) passes, and has a cylindrical shape with an upper surface and a lower surface opened. . The heat-expandable filler according to claim 1, wherein the thermally expandable filler (2) is fixed to the inner circumferential surface of the through-hole (2) and has an upper surface and a lower surface with an opening through which the pipe (3) 30. The refractory filling structure according to claim 1, The refractory filling structure according to claim 1, further comprising a heat insulating material (20) installed between the inner peripheral surface of the through hole (2) and the pipe (3) together with the thermally expandable filler (30). The heat-expandable filler (30) according to claim 1, wherein a bottom portion of the space between the through hole (2) and the pipe (3) is provided at a lower end portion of the through hole (2) 50). ≪ / RTI > The refractory filling structure according to claim 5, wherein a slit (53) through which the pipe (3) passes is formed on one side of the pedestal (50). Mixing polyol, expanded graphite, and sugar caramel or sugar silica caramel to prepare liquid B;
Injecting and mixing the liquid A containing the liquid B and the isocyanate into a mold to prepare a solidified tubular thermally expansible filler 30;
And placing the thermally expandable filler (30) in a space between the through hole (2) of the building structure and the pipe (3). Mixing polyol, expanded graphite, and sugar caramel or sugar silica caramel to prepare liquid B;
Closing the lower end of the space between the through hole (2) of the building structure and the piping (3);
And injecting the prepared liquid B and isocyanate-containing liquid A into the through-hole 2, and mixing and reacting the liquid to form a thermally expandable filler 30. . The method as claimed in claim 7 or 8, wherein the thermally expandable filler (30) is installed on the inner circumferential surface of the through hole (2) before the filling case (10) Wherein the refractory filler structure is formed of a thermoplastic resin. The heat insulating material (20) according to claim 7 or 8, wherein a part of the space between the through hole (2) and the pipe (3) before or after the thermally expandable filler (30) is installed inside the through hole (2) And filling the refractory filler structure with the refractory filler. The method as claimed in claim 7 or 8, wherein the pedestal (50) is provided at the lower end of the through hole (2) before the thermally expandable filler (30) is installed inside the through hole (2) And closing the lower end of the space between the piping (3). [7] The method according to claim 7 or 8, wherein when the caramel sugar is used in the step of preparing the liquid B, 20 to 70 parts by weight of phosphoric acid is mixed with 100 parts by weight of sugar (Sucrose) Wherein the refractory filler structure is manufactured by a sugar phosphate phosphoric acid decomposition reaction. The method according to claim 12, wherein, in the step of preparing the liquid B, 200 to 800 parts by weight of a polyol for urethane is mixed with 100 parts by weight of the caramelized sugar caramel. . [14] The method of claim 12, wherein the sugar phosphate caramel is prepared by adding a stabilizer and sucrose-phosphate synthase to the caramel sugar. 13. The method according to claim 12, wherein, in the step of preparing the liquid B, 10 to 40 parts by weight of a colloidal-type meta-silicate is mixed with 100 parts by weight of solid sodium octaborate in mixing the expanded graphite with the sodium carboxymethylcellulose phosphate, Is added to the refractory filler structure. 13. The method of claim 12, wherein at least one of petroleum or petroleum jelly is further added to maintain the viscosity of the liquid B in the step of preparing the liquid B. 9. The method according to claim 7 or 8, wherein, in the case of using the sugar silica caramel in the step of preparing the liquid B, the sugar silica caramel is prepared by dissolving 50 to 80 parts by weight of sugar relative to 100 parts by weight of colloidal silica Wherein the refractory filler structure is formed by a method comprising the steps of: 18. The method according to claim 17, wherein in the step of preparing the liquid B, 15 to 30 parts by weight of carmellum of sugar silica and 20 to 50 parts by weight of expanded graphite are added to 100 parts by weight of a polyol having a molecular weight of 1000 to 3000 g / A method of constructing a refractory filled structure using a thermally expandable filler. 18. The method according to claim 17, wherein, in the step of preparing the liquid B, the sodium octaborate solution produced by mixing 10 to 40 parts by weight of the colloidal-type meta-silicate with 100 parts by weight of the solid sodium octaborate in mixing the expanded silica- Is added to the refractory filler structure. 18. The method of claim 17, wherein, in the step of preparing the liquid B, at least one of petroleum or vaseline is further added to maintain the viscosity of the liquid B.

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