KR101317357B1 - Manufacture method of inorganic foam using geopolymer as binder - Google Patents

Abstract

The present invention can be used as a thermal insulation and soundproofing materials used to provide insulation and sound insulation of buildings using inorganic binders of geopolymers as a binder, non-combustible inorganic (Inorganic) that can provide excellent water resistance and durability The present invention relates to a method for producing a foamed article.
The method for preparing an incombustible inorganic foamed molded article disclosed herein is a three-dimensional inorganic network macromolecule in which microbubbles of Si—O—Al—O bonds are formed by alternately sharing oxygen atoms in SiO ₄ and AlO ₄ tetrahedra. As a means for constructing the geopolymer of, providing an inorganic foam powder and granules (Granule) to give a fine bubble inside the inorganic molded body to provide excellent heat insulation and sound insulation effect; Supplying alumina silicate powder raw material, which is a starting material of the geopolymer, to provide a geopolymer to provide a foamed molded product having excellent bonding strength; Alkali metal and additive supplying steps to provide alkali activators, additives, and the like during the formation of the geopolymer; Mixing to provide a uniform distribution of starting materials and additives to provide the inorganic foams and geopolymers provided in the foaming step; Forming step for configuring in a predetermined size shape for insulation and sound insulation; A curing step for providing durability and water resistance to the foamed molded body by forming a network of three-dimensional geopolymers by reacting with a material having an aluminosilicate composition and an alkali material; The present invention relates to a method for preparing an inorganic foamed molded article provided by a process including a final heating step for removing moisture contained in the foamed molded article.

Description

Manufacturing method of inorganic foam using geopolymer as binder

The present invention relates to a method for producing a non-combustible inorganic foamed molded article that can be used as a heat insulating material and a soundproofing material used to provide insulation and sound insulation of buildings using an inorganic binder of geopolymer as a binder.

The non-combustible inorganic foamed molded article disclosed herein is a three-dimensional inorganic network macromolecule of a macromolecule in which microbubbles of Si—O—Al—O bonds are formed by alternately sharing oxygen atoms in SiO ₄ and AlO ₄ tetrahedra. It is provided by constructing.

The inventors of the present invention have a lot of interest in the environment and energy fields and use the polymer insulation of petrochemical products of styrofoam and foamed polyurethane, which have been widely used until now, which not only induces fatal injury due to the release of toxic gases due to fire, Recognizing a lot of problems that can accelerate the pollution, many efforts and studies have been conducted to improve them, and as a result of this research, the manufacturing method of ultralight cement insulation material (application number: 10-2010-002417), inorganic using geopolymer Applied patent for manufacturing method of foam molding (application number: 10-2010-0114664), manufacturing method of inorganic foam molding using geopolymer and silica sol.gel method (application number: 10-2010-0114665) The invention of the present application was completed in the course of conducting research to obtain this improved inorganic insulation.

In Korea, where most of the energy depends on imports, 25% of the total energy consumption is used in the building, so the energy saving problem in the building is very important. In order to provide a safe living environment, the heat insulating material is required to have excellent heat insulating effect and no damage to the human body and the atmosphere caused by the emission of harmful gases due to the fire.

In this way, the inorganic foam material provided herein as a means for preventing heat loss while reducing human injury and damage to the air environment due to a fire occurrence has excellent thermal insulation effect and prevents convection during heating or cooling. In addition to providing thermal insulation effect, the foamed molded body is composed of inorganic materials, and thus it is expected to greatly reduce injuries and damages to the atmosphere by incombustible fires.

Insulation materials generally distributed / sold on the market by the prior art include expanded polystyrene, glass wool, expanded polyethylene, polyurethane foam, vermiculite, perlite, urea foam, cellulose insulation, soft fiber board, phenol foam, and aerogel. Although foamed polystyrene is used for foaming polystyrene, it has high thermal insulation effect and light weight, and is excellent in transportation and construction.However, it can be fatal to human body because it is weak to high temperature and ultraviolet rays at the maximum safe working temperature of 70 ℃ and high risk of ignition or toxic gas in case of fire. In the case of the glass surface, the air layer sealed between the glass fibers is a heat insulating layer, and besides heat insulation, it has excellent incombustibility, sound absorption, workability, and transportability. Has the disadvantage of requiring a moisture-proof layer, The foamed and flame-retardant mixture is mixed with the polyethylene resin and extruded and foamed, and then the laminated sheet of foamed foam is thermally fused and manufactured by using a heat insulating plate and thermos with self-extinguishing property, and the thermal conductivity at the average temperature is 0.039 kcal / mh ℃ or less. Although the effect is excellent, it has the disadvantage of providing the human body's toxicity due to the emission of toxic gas in case of fire with the maximum safe operating temperature of 80 ℃.

In the case of polyurethane, polyol, polyisocyanate, foaming agent, and additives for flame retardancy are the main raw materials, and as heat insulating material of organic foam (independent bubble structure) in which polyurethane foam is molded, it is heat resistant (maximum safe operating temperature 100). It is suitable for cold storage materials such as refrigerators because it has better insulation than ℃), but it has the disadvantage of decreasing volume after construction and lowering thermal conductivity. This also has the disadvantage of toxic gas being released in the same way as other foaming polymer materials.

In case of vermiculite, it is a pore-type inorganic material fired at 1000 ℃ by mica-based ore. It has advantages in insulation, insulation, non-combustibility, sound insulation, and condensation prevention. After crushing, sintering, and swelling, it consists of small particles of light spherical shape with microvoids inside, and is used as light weight aggregate and heat insulating material. In order to make a high energy of 1,000 ℃ or more has a disadvantage.

In the case of aerogels, structures with a thickness of 10,000 parts of hair are entangled like cotton candy, so that the air hole occupies 95% of the total volume. I use it. As such, the foamed materials developed so far have a high risk of causing toxic chemical harm in the event of a fire in case of fire, and can accelerate environmental pollution. In the case of ceramics, a high temperature of 1,000 ° C. or higher is required. As it has high energy loss and requires a lot of equipment cost for molding in a certain frame for compression molding or has a disadvantage of high price like aerogel, it not only loses the price competitiveness but also has various aspects as a building insulation material for energy saving. Limited use in the field of

As seen in the fires of Hwaseong C Land, Incheon Hope House, Daegu Subway, and Busan high-rise building, the foam material developed as insulation and soundproofing material can cause fatal harm to human body by toxic gas emission in case of fire. Not only is the risk very high, it can accelerate environmental pollution, and in the case of foamed ceramics or lightweight cements, a large amount of system, high temperature, and manufacturing process time are required for a long time, resulting in a large energy loss and a significant drop in productivity.

Particularly, in the case of Vermiculite, Perlite, and Aerogel, which are described above, since they are composed of inorganic materials, the problem of fire can be largely overcome. Not only does not have a suitable binder to maintain a constant shape and durability and water resistance for use, but also has low workability and does not solve the problem of not being able to provide high durability and water resistance.

In order to overcome the problems with the conventional heat insulating material as described above, we are currently making a lot of efforts to develop a non-flammable inorganic heat insulating material that can maximize the heat insulation effect while preventing heat loss and suppressing greenhouse gas emissions. In the related art, Korean Patent Laid-Open Publication No. 2005-0033352 uses carbonic acid bonded to sodium bicarbonate by adding phosphate to sodium bicarbonate by using crystalline aluminosilicate inorganic insulating material based on sodium metasilicate and alumina cement as a basic skeleton. The non-combustible heat insulating material composition that generates carbon dioxide bubbles at the same time as the dissociation, and the prior art that proposes a heat insulating material using the same and a method of manufacturing the same, but this is by using the powder or granules of the pre-foamed inorganic foam of the present technical configuration as an inorganic binder of the geopolymer It can be seen that it is completely different from the technical configuration of obtaining a heat insulating material of a constant shape excellent in high strength and water resistance.

In Korean Patent Laid-Open No. 2006-0041137, using a silicate cement as a binder, foamed pearlite particles, foamed vermiculite particles and foamed ceramic particles alone or mixed, mixed with sodium silicate cement, and completely nonflammable and completely free The present invention provides a ceramic foamed molded product manufactured using gas and sodium silicate cement having a non-polluting property as a binder and a method for manufacturing the same. Although it can be considered similar, the configuration of the binder for providing the bonding force of the foamed body is completely different, it can be seen that also in terms of the configuration of other technologies.

Korean Patent Laid-Open No. 2009-0019087 relates to the manufacture of flame retardant styrofoam boards for building thermal insulation materials using expanded vermiculite, and includes expanded vermiculite having excellent flame retardancy and sound insulation, and polystyrene foam resin having excellent thermal insulation. It is proposed a flame retardant styrofoam board which is a main raw material, flame retardant and flame retardant adhesive compound to strengthen the adhesive strength of the two raw materials, and then thermoforming in a molding machine, which is styrofoam physically mixed with expanded vermiculite and styrofoam In order to impart flame retardancy and strengthen adhesion between the two materials, non-machined flame retardant adhesives such as sodium silicate compound and flame retardant urethane adhesive are spray-mixed and thermoformed at a high temperature, while the present technology can be applied as a method to replace the problems of styrofoam. Make sure that the composition of the There.

In addition, Korean Patent Laid-Open Publication No. 2009-0101402 uses various high-temperature foaming minerals including expanded pearlstone and expanded vermiculite particles as main raw materials, including inorganic silicate (water glass), incomplete gel silicate, and sodium silicate cement. Using an inorganic adhesive, a non-combustible plate-like material (or shape material), a non-combustible plate-like material (or cosmetic shape material) based on the above, and a manufacturing method thereof are proposed. Although most of them are made of inorganic materials and have a very great advantage of providing incombustibility, when the sodium silicate is used as the binder in the above technique, it has a big disadvantage that it cannot provide water resistance at all, as well as the geopolymer binder of the present application. It can be seen that the technical configuration is completely different.

Korean Patent Laid-Open Publication No. 2010-0045114 discloses an inorganic material obtained by rapidly heating glass rocks with gas or electricity to vaporize crystal water and an auxiliary material obtained by stirring water glass (Na ₂ 0 · SiO ₂ ), flame retardant, antimony, and polyvinyl acetate (PVA). The mixture is molded in a mold and thermally cured, wherein the mixing ratio of the inorganic foam and the auxiliary material is 2: 1, and the auxiliary material is 65 to 70% by weight of water glass, 27.5 to 32.5% by weight of flame retardant, 2.48 to 3.0% by weight of antimony, and PVA 0.01 To present a non-flammable inorganic insulation prepared by stirring at a ratio of to 0.02% by weight, in the present invention, the temperature required for heat treatment is a temperature range of 200 ° C or less at room temperature, whereas in the present invention, crystal water is vaporized using a gas or an electric furnace. Selecting a very high temperature heating range can deviate very much from the technical idea of the present application, and also includes technical components. W may be that the spirit is different.

In Korean Patent Publication No. 2010-0120728, it is a non-combustible ceramic ball that prevents damage by volatile organic compounds (VOC) and has excellent heat resistance to prevent the spread of fire as a non-combustible material and to replace existing heat insulating materials with excellent dust, soundproof and insulation properties. As the panel composition is proposed, the binder of the present application uses a geopolymer, whereas the binder of the cited invention uses epoxy, which may result in fatal damage to humans caused by a large amount of toxic gases in the event of a fire. It can be seen that it is completely different from the present.

Recently, ALC (Autoclaved Lightweight Concrete) or foamed ceramics have been in the spotlight for environmental and economic reasons. However, ALC is a lightweight foamed concrete that is cured by high temperature and high pressure steam. The high temperature and high pressure (temperature: about 180 ℃, pressure: 10 kg / ㎠) need to cure the steam mixture, huge equipment cost is required, and a lot of curing period is required to manufacture lightweight foam cement, it will be less competitive. In addition, there is a need for a technique to solve the problem that the specific gravity is more than 0.5 g / ㎠ and the heat insulation effect is not high.

In addition, in the case of inorganic insulating material, very high temperature of 1,000 ° C. or higher is required to provide durability, or when a fine bubble shape is provided at a low temperature, bonding strength or water resistance is very low, and thus it cannot serve as a thermal insulation and soundproofing material for a long time. There is a need for technology that can solve the problem.

The present invention has the advantage that the non-combustible inorganic foam is composed of inorganic materials in the event of a fire, the toxic gas is not released at all can greatly reduce the human injury and protect the atmospheric environment, but the foamed inorganic material In order to achieve the upper body, high energy is required because the durability can be achieved only by heating to a very high sintering temperature, and there is a problem to solve the problem of poor workability due to the complicated manufacturing process of the foam ceramic.

In addition, the conventional foamed inorganic molded body is largely lacking in water resistance and has a relatively high specific gravity, which solves the problem that the price competitiveness is weak and the price competitiveness is much lower than that of conventional petrochemical products such as styrofoam or polyurethane foam. It has a problem to do.

In addition, in order to solve the problem of energy when the conventional inorganic foamed body is to be obtained, even if a technology capable of manufacturing an inorganic body having a low specific gravity in a low temperature range is introduced, the bonding strength and the water resistance of the inorganic body are greatly increased. It is an invention started with the problem to overcome the problem of being unable to maintain the shape for a long time as an inorganic heat insulating material and a sound insulation material.

The present application does not require a large reaction device such as an autoclave and a long time reaction condition as in the manufacture of a conventional cement insulation material, and compresses it into an ultra-light inorganic foam molding by using an inorganic binder of geopolymer even without a conventional polymer binder. It aims to find an inorganic foamed molded article having excellent strength as well as water resistance and a method of manufacturing the same.

In addition, the present application has a technical idea and an object of the present invention to provide a lightweight non-combustible inorganic foamed molded article that can replace the flammable foamable polymer resin or ALC lightweight foam concrete provided in the conventional petrochemical.

The technical idea of the present application is to obtain an inorganic foamed molded article having excellent compressive strength and water resistance by using a geopolymer. First, when the geopolymer is examined, the geopolymer is performed to develop cement that does not require clinker in the 1930s. In the early 1950s, the former Soviet Union Glukhovsky developed a soil cement by mixing natural minerals containing a large amount of zeolite with an alkaline solution. Although forgotten, in late 1970, Davidovits, France, was working to improve the properties of polymers susceptible to high temperatures, using kaolin and limestone to synthesize new materials. And naturally occurring three-dimensional alumina-silicate structure Since it is similar to the existing polymer compound, it is called a geopolymer, and it is called by various names such as alkali-bounded-ceramics, Sialate, hydroxide ceramics, and alkali activated cement. It can be called a polymer material.

Sialate is an abbreviation of the silicon-oxo-aluminate, a SiO ₄ and AlO ₄ tetrahedra chain and the ring (Ring) of Si ⁴⁺ and Al ^{3 +} Sialate to configure the network by sharing the oxygen atoms in the oxygen-shift 4 in coordination polyhedron configured as a polymer, a typical display is M _n - and _{(SiO 2) z -AlO 2n ·} H 2 O, wherein z is 1, 2, 3, M is K ⁺ or Na ⁺ 1 cation, such as, n is from chunghap Indicate the degree.

Therefore, the complex geopolymer structure is expected to be composed of chains, chains, sheets, and three-dimensional networks of Q units connected to SiO ₄ and AlO ₄ tetrahedra.Poly silicate (PS) and poly silicate-siloxo (PSS) are used for geopolymers. Polysilate-Disiloxo (PSDS) is a representative form, and a highly simplified reaction mechanism of geopolymerization can be described as follows.

An alkaline aqueous solution of alumina-silicate raw materials (M ^+, OH ^-) from hydrolysis by making a mixed solution of aluminate and silicate, differentiate it as new, equilibrium (dehydration), gelled (dehydration-gel first generation), The three-stage treatment of the restructure (dehydration-gel 2 generation) enables polymerization and curing (dehydration) .The important process of geopolymers is the conversion of solid alumina silicate raw material to synthetic alkali alumina silicate (dissolution). When it happens.

The present invention is a method of manufacturing an inorganic foamed molded article that can provide excellent heat insulation and soundproofing properties and provide water resistance, durability and non-combustibility by using a geopolymer as a binder, by alternately sharing oxygen atoms in SiO ₄ and AlO ₄ tetrahedra. 1-4 types of liquid sodium silicate, potassium silicate, lithium silicate and aluminum siliconic acid to form geopolymer, a three-dimensional network macromolecule in the form of Si-O-Al-O bond, and to provide excellent insulation and sound insulation A liquid silicate selected from sodium is dried by a thermal method to obtain a solid phase silicate, or precipitated by a water-soluble organic solvent by a chemical method to obtain a solidified silicate, and the solidified silicate is 90 Foaming in the temperature range of ~ 350 ℃, to obtain an inorganic foam powder and granules (Granule) to obtain a polarized powder and granules through a sieving process The first step,
In order to provide a geopolymer to obtain a foamed molded article having excellent binding force, a molecular formula of (Si ₂ O ₅ , Al ₂ O ₂ ) n is provided in the feeding step of the alumina silicate powder raw material, which is the starting material of the geopolymer. In order to form a gel of amorphous aluminosilicate composed of O-bonds, a powder selected from minerals consisting of alumina-silicate oxides, fly ash, and furnace slag is selected. A second step of providing 5 to 150 parts by weight of the inorganic foam powder and granules obtained in the first step based on 100 parts by weight,
Alkali activators during the formation of geopolymers include sodium hydroxide (NaOH), sodium carbonate (Na ₂ CO ₃ ), potassium hydroxide (KOH), potassium carbonate (K ₂ CO ₃ ), calcium hydroxide (Ca (OH) ₂ ), calcium oxide ( A third step of supplying an alkali metal so that at least one alkali metal selected from CaO) is added to maintain the pH of the mixed composition with the alumina silicate powder raw material obtained in the second step in the range of 11 to 13,
Ceramics that can emit far infrared rays and anions to enhance functionality during the formation of geopolymers, adsorbents for adsorbing harmful gases in the atmosphere, fibers for improving the bending strength of foamed molded products, polymers for improving the water resistance of foamed molded products When the additive selected from the group is based on 100 parts by weight of the raw material powder prepared in the third step based on the additive supply step is added to supply less than 40 parts by weight,
Through the forming step, curing step and heating step of uniformly mixing the raw material prepared up to the first step to the additive supply step to make a uniform size and shape, the present invention was completed.

In order to provide a beneficial indoor environment in addition to the above basic configuration, to supply a ceramic powder composed of an inorganic oxide, or to supply a fiber (Fiber) in order to improve the insufficient tensile strength peculiar to the inorganic foamed molded article of the insulation and sound insulation It includes the technical idea that can be applied to the production method of non-combustible inorganic foam molded article which can improve the excellent compressive strength, water resistance and durability.

In the manufacturing method of the inorganic foamed molded article of the present invention, the inorganic foam powder and granule (Granule) providing step is filled in a certain shape to provide a heat insulation and sound insulation effect by the fine pores provided in the inorganic particles, so that it can be maintained at a constant size Inorganic powder or granules having fine pores may be supplied.Inorganic powder or granules having fine pores may be used in one to four types of liquid sodium silicate, potassium silicate, lithium silicate and aluminum siliconic acid. One or more liquid silicates in sodium are heated or dried by a thermal method, or precipitated by a water-soluble organic solvent by a chemical method, and the solid phase-formed silicates are heated and foamed by heating at a temperature of 90 to 350 ° C., It may be applied by a method of providing a filler of heat insulation and soundproof material suitable for use by sieving it.

At this time, in order to improve the physical properties of the inorganic insulating material and sound insulation material of the present application, when the inorganic powder or granules foamed by solid silicate based on 100 parts by weight based on the perlite foam (Perlite), vermiculite (Vermuculite), silica gel ( Silica gel or aerogel (Aerogel), volcanic stone, zeolite (zeolite) may be applied by a method in which at least one inorganic insulating material is added at 45 parts by weight or less.

In the production method of the inorganic foamed molded article of the present invention, the supplying step of the alumina silicate powder raw material, which is the starting material of the geopolymer, is a supplying step of the starting material for providing the geopolymerization for the purpose of improving the durability and the water resistance of the foamed molded product. O-Al-O bonds provide a molecular formula of (Si ₂ O ₅ , Al ₂ O ₂ ) n to form an amorphous aluminosilicate gel (Gel) to form minerals of alumina-silicate oxides or plies Fly ash, Furnace slag powder may be selected and used.

At this time, geopolymerization is an exothermic reaction that forms oligomers through a unit structure constituting large three-dimensional molecules. One of various solidification reactions is a chemical reaction between alumina-silicate oxide and alkali-polysilicate, and Si-O- Al has a molecular formula of (Si ₂ O ₅ , Al ₂ O ₂ ) n, and the reaction at this time is (SiO ₂ , Al ₂ (OH) ₄ ) is 2 (Si ₂ O ₅ , Al ₂ (OH) _{4) 2 (Si 2 O 5} , Al 2 O 2) n + 4H 2 O or SiO, and Al ₂ O reaction of 4SiO by condensation of steam _{(vapour) + 2Al 2 O (} vapour) + 4O 2 (Si 2 O ₅ , Al ₂ O ₂ ) _n may be possible, and in order to improve the reactivity of geopolymerization, it may be preferable that the size of the powder is uniform and the size of the particles as small as possible.

The content of minerals consisting of alumina-silicate oxides as a starting material for providing geopolymerization herein, or powders of fly ash and blast furnace slag, can vary over a wide range of concentrations depending on the type of insulation or sound insulation. It is included in the inorganic foam powder and granules (Granule) based on 100 parts by weight of the powder made in the providing step is preferably included 5 to 150 parts by weight, more preferably 20 to 120 parts by weight is most advantageous, most Preferably, 40 to 80 parts by weight is advantageous. When the alumina-silicate-based powder for providing the geopolymer is added to 5 parts by weight or less, a three-dimensional network is weakly formed, which makes it difficult to provide durability and water resistance of the foamed molded article. There is a problem, and when the alumina-silicate powder is added in an amount of 150 parts by weight or more, One geopolymer has the advantage of providing a foamed molded article having excellent durability as well as water resistance, but the alumina-silicate-based powders that can provide geopolymers have a high specific gravity, so that the relative specific gravity of the inorganic insulating material increases. As a result, there is a problem in that the insulation effect is lowered.

In addition, the powders for providing the geopolymer may use a powder having a size of 0.1 μm to 0.25 mm, and are composed of alumina-silicate oxides for providing geopolymerization, fly ash, and furnace slag. When the particle size of the powder) is 0.1 μm or less, the specific surface area is large, and the reactivity with salts of alkali metals, which are alkali activators, can provide an improved quality of the inorganic foamed molded product of the present invention, but it provides fine particles. In the pulverization step to have a lot of manpower and expensive grinder is required, the particle size is more than 0.25 mm has the advantage of low price, but the specific target is low geopolymerization of the present invention is low reactivity with alkali activator It is desirable to provide a powder of the proposed size because it has a disadvantage that it is difficult to provide.

In the alkali metal and additive supplying step in the method for producing an inorganic foamed molded product of the present invention, the alkali supplying step is an activator for promoting the production of the geopolymer for improving durability and water resistance of the inorganic shape of the present invention. NaOH), sodium carbonate (Na ₂ CO ₃ ), potassium hydroxide (KOH), potassium carbonate (K ₂ CO ₃ ), 1-4 types of liquid sodium silicate, potassium silicate, lithium silicate, sodium aluminum silicate calcium hydroxide (Ca (OH ₂ ), at least one alkali metal selected from calcium oxide (CaO) may be selected, and the amount of supply may vary depending on the type of starting material for providing geopolymerization or the type of alkali metal supplied to the target. In the geopolymer, moisture must be provided because a material having a composition of aluminosilicate reacts with an alkaline material to exhibit hydraulic properties, and accordingly, the pH of the composition is 11 to 13 It is preferred to be fed to keep the stomach.

More specifically, the alkali may be used in the range of 0.5 to 15 parts by weight based on 100 parts by weight of the powder for providing the geopolymer, preferably 2.0 to 12 parts by weight, and more preferably 3.5 to 9.0 parts by weight. The addition is advantageous, and most preferably 4.5 to 6.5 parts by weight, which is contrary to the technical idea of the present invention because it can not provide the role of the activator for providing the geopolymer when supplied with less than 0.5 parts by weight of alkali, alkali When supplied in an amount of 15 parts by weight or more, it is preferable to supply the alkali of the above proposed concentration because it may cause diseases related to hygroscopicity and skin contact by excess alkali components inside the final molded body.

Looking at the properties of the alkali metal for example the size of the actual cations bar affecting the crystal structure, Na ⁺ have reached the ion size is less than K ^+, and to form a strong ion pair in a small silicate oligomers, K ⁺ ions are Al As it is easy to combine with (OH) ₄ ^- to form large silicate oligomers, the geopolymer precursor synthesized in KOH solution shows better solidification time and compressive strength than NaOH solution.

In addition, in the case of calcium, the CaO content of the material has been reported to enhance the formation of geopolymer by the amorphous Ca-Al-Si-O gel structure. In many papers, calcium has a clear effect on the bonding strength of the geopolymer. According to the type and size of the inorganic foamed molded article of the present invention, as the porosity decreases, the fine pores decrease and the final product can be strengthened due to the formation of the amorphous Ca-Al-Si-O gel structure. Metals can optionally be used.

In addition, an additive may be supplied along with an alkali metal for imparting additional functionality during the manufacturing process of the inorganic foamed molded product of the present application. The additive may be used to adsorb harmful gases in the atmosphere and ceramics that may emit far infrared rays and anions. Minerals composed of alumina-silicate oxides as starting materials for providing the geopolymerization can be used, which can be used by including adsorption, fibers for improving tensile strength of foamed molded articles, and polymers for improving water resistance. It is preferable to include 40 parts by weight or less based on 100 parts by weight of the powder of ash and blast furnace slag. The possibility of imparting functionality by the additive when the additive is contained by 40 parts by weight or more. The additive is a total raw powder because there is a possibility that it is higher but relatively other physical properties are lowered. Contrast, it is preferable to add more than 40 parts by weight.

Among the additives, ceramics for releasing far-infrared rays and anions and providing other functionalities include elvan, ocher, olivine, silicate mineral, diatomite, wollastonite, Pyrophyllite, Dolomite, Lithium Minerals, Magnesite, Bauxite, Bentonite, Pumice, Borate, Serpentine, Acid Acid clay, iron oxide, garnet, carbonate minerals, attapulgite, zeolite, sepiolite, nephrite, apatite , Illite-Mica, Feldspar, Barite, Talc, Diatomaceous earth, Graphite, Hectorite, Clay Minerals, Zirconium Minerals, Titanium Minerals, To One or more selected from tourmaine, tourmaline, fume silica, and aerogel may be included. The adsorbents for adsorbing harmful gases among the additives are 700 to 1,800 m 2 / g. Activated carbon and activated carbon fibers having a specific surface area may be included, and the fibers for improving the tensile strength of the foamed molded product among the additives provide the ultra-light foamed molded article at a low temperature, and the tensile strength which is a characteristic of the inorganic molded body itself. It is preferable to include a fiber which can provide a binding force inside the foamed molding in order to further increase the tensile strength of the foamed molding because it is vulnerable to impact without.

Fiber of the additive (Fiber) can be used any of natural fibers or artificial fibers without particular limitation, in the case of natural fibers cellulose-based fibers (seedling fibers, bast fibers, salt vein fibers, fruit fibers) or staples or Filament-type protein-based or mineral-based fibers may be included, artificial fibers are organic fibers (regenerated fibers, semi-synthetic fibers, synthetic fibers) or inorganic fibers (metal fibers, glass fibers, rock fibers, slag fibers, carbon fibers) It may be included, the thickness of the fiber to improve the tensile strength of the foamed molding is advantageously 3 to 50 ㎛, preferably 5 to 25 ㎛ thick, most preferably 5 to 10 ㎛ thick , Fibers with a thickness of less than 3㎛ are characterized by smoother appearance and softer to the touch due to the characteristics of the fiber. In spite of its high value, most of the fiber produced from natural fiber and artificial fiber besides glass fiber has a thickness of more than 3 ㎛, which means that there is a lack of option to add fiber. The fiber having a is not smooth in appearance, and generally has a disadvantage in that the strength is lower than the fine fiber, it is preferable to use a fiber of the thickness range. The length of the fiber is advantageously 1 to 50 mm, more preferably 5 to 35 mm, most preferably 10 to 25 mm, the heating step of the present invention when the length of the fiber is 1 mm or less The short length of fiber connection between the fine porous cement particles of the three-dimensional silica network formed in the has a disadvantage of not very large, and should be uniformly dispersed with the powder or granules of the fiber and foam in the following mixing step, When 50 mm or more, the fibers are entangled with each other, and thus it is preferable to use fibers having a length in the above range because the possibility of inhibiting the physical properties of the foamed ceramic is large.

In addition, in order to further improve the water resistance of the foamed molded article, water-dispersible or water-soluble polymer resin or powdered polymer resin is mixed before the mixing step, thereby providing a foamed molded article having improved water resistance by thermal fusion of the polymer resin by a final heating step. However, if the polymer resin is composed of organic matter, it may be advantageous to not add as much as possible because it may be harmful to the human body by the release of toxic gases caused by the fire.

As mentioned above, the mixing step in the manufacturing process of the present application is that the geopolymer has a mechanism in which a material having a composition of Alumini silicate reacts with an alkaline material to form a geopolymer by hydrophobicity. It must be included, and for this purpose, it can be used if the conditions for mixing moisture, heat insulation, and sound insulation are uniformly mixed. In order to improve the properties of the foamed molded product of the present application and to provide inherent functionality and additional functionality Water and components thereof may be mixed and used uniformly.

The molding step in the manufacturing process of the present application is not particularly limited, and the molding method can vary depending on the shape, size, thickness and number of production of the molded article, and if the molded foam according to the present invention to be used as a heat insulating material and a soundproofing material, all It may be possible, and the molding method according to the present invention may be selectively used among the compression molding method or the molding method by rolling molding.

The curing step in the manufacturing process of the present application is maintained at a suitable temperature during curing by the geopolymer for the purpose of protecting by changes in the external system until the physical properties of the inorganic insulating material of the present invention, and has a sufficient moisture content, It must be cured to protect it from harmful external forces such as impact or excessive load until it is sufficiently cured. Specifically, the curing temperature is preferably cured at a temperature of 5 to 95 ° C., more preferably. The temperature of 15 ~ 75 ℃ is advantageous, and most preferably 25 ~ 55 ℃ temperature bar, when the curing temperature is 5 ℃ or less, the temperature is low, the strength and the expression of water resistance can be lowered to exhibit the durability of the inorganic insulating material There is a problem that there is a problem, and when the curing temperature of 95 ℃ or more has the advantage that can provide high strength and water resistance expression , As well as it decreases the economic efficiency greatly depending on the need for a large heat energy and equipment for heating to a high temperature is preferably cured to the appropriate temperature, depending on that there is a risk of burns due to carelessness.

The curing method must be carried out in the presence of moisture in the foamed molded article, so the method of supplying one type of water selected from aquatic curing, spraying curing and wet curing, or the one selected from film curing or sheet curing. It is desirable to apply a method that prevents moisture from flying away, and in the curing period, curing is preferably performed for as long as possible in order to provide a high-strength foam molded product, and in the wet atmosphere, the aluminosilicate reacts with the alkali activator to be three-dimensional. It is desirable to cure at least 5 hours to produce a foamed molded article that exhibits a certain level of strength by the network.

The heating step may include a near infrared heating method, an infrared heating method, a microwave heating method, a hot air heating method using an oven, a hot plate direct heating method, a near infrared heating method, infrared heating method, room temperature drying method, oven The hot wind heating method by (Oven) and the direct heating plate heating method are suitable for manufacturing ultra-light foam molded articles having a thin thickness, and the microwave heating method is that when a microwave of 2,450 MHz is applied, the water molecules having polarity are vibrated as much as microwaves. The method of heating by microwave (aka microwave) in case of thick and large sized ultra-light foamed molded body because it has the advantage of removing the moisture contained in the object at a very high speed by increasing the temperature by It is advantageous to use.

The heating temperature is preferably heated to a temperature of 80 ~ 350 ℃, more preferably 120 ~ 280 ℃, most preferably when the temperature of 150 ~ 220 ℃ is preferred, when heating to a temperature of 80 ℃ After curing, there is a problem that the removal rate of moisture in the foamed molded body is not so great that it may inhibit the thermal insulation effect due to the moisture remaining in the molded body.If the heating temperature exceeds 350 ℃, the moisture can be rapidly increased. Although it has an advantage, it is preferable to maintain the proposed heating temperature because it has a disadvantage in that the heat loss due to high temperature heating becomes large and economic efficiency is lowered.

As described above, in the case of the conventional general inorganic insulation material manufacturing method, as a very high heat source and a large number of large equipment is required, the global warming is further accelerated, and the competitiveness of the company may be greatly reduced, and the lightweight foam cement In the case of (ALC, Autoclaved light concrets), the inorganic molded article foamed by the foaming agent is deflected by the inorganic particles having a high specific gravity, so that the thermal insulation effect is not good.In the case of the lightweight foam cement, the large autoclave facility and the manufacturing process It takes a long time, so the company's risk (Risk) is a big problem, other ceramic insulation material is insufficient in water resistance and compressive strength, so the long-term durability of the inorganic insulation is inferior, so it is difficult to exhibit the function of the insulation material semi-permanently In the present application, Si-O-Al-O bond form Using a three-dimensional network macromolecule of the geopolymer as an inorganic binder of the molded article, and providing inorganic foam powder and granules; Supplying alumina silicate powder raw material which is a starting material of the geopolymer; Alkali metal and additive feeding step; Mixing step; Molding step; Curing step; It provides an inorganic insulating material that provides high strength and water resistance in a short time by the binder of the geopolymer by a simple process including a heating step, and can exhibit long-term durability with little effect on acid or sea water, and the amount of carbon dioxide generated In addition to the small number of fine bubbles present in the foamed molded article, it has the effect of providing a semi-permanent non-flammable inorganic foamed molded article while providing excellent heat insulation and sound insulation.

1: A schematic manufacturing process diagram for obtaining an inorganic foam using a geopolymer for improving durability and water resistance herein.
2 is a photographic view of the insulating molded product made through the example process of the present application.

Hereinafter to describe the embodiments of the invention for implementing the technical idea of the present application, the following embodiments illustrate one application for the implementation of the technical idea of the present application, and should not be construed as limited thereto. It should be understood that the scope of protection of the present application should be equivalently interpreted as meanings and concepts consistent with the technical idea of the present invention, and that there may be various equivalents and modifications to replace them at the time of the present application. will be.

In addition, the embodiments described herein describe examples of the range that can achieve the object of the invention in a range that satisfies the desired level of results through a number of trial and error, the range indicating the upper and lower limits of the numerical value It should be recognized that the deviation is a fixed value because the inventors can not achieve or lack the desired purpose if the deviation from the upper and lower limits.

Example 1

12 kg of three kinds of water glass purchased from Yeongil Hwaseong Co., Ltd. were measured and fed with methanol while stirring with a mechanical stirrer to precipitate white sodium silicate by chemical method. After pulverization, the particles were subjected to sieving to obtain powders of 425 μm or less, 425 μm to 1.18 mm, and 1.18 mm or more. The polarized powder was heated to about 180 ° C. to foam, thereby obtaining inorganic foam powder and granules for the examples.

Example 2

The same procedure as in Example 1 was conducted except that 480 g of fly ash was added to the water glass.

Example 3

12 kg of liquid potassium silicate purchased from Yeongil Hwaseong Co., Ltd. was measured, heated and dried in a dry oven at 100 ° C to make solid potassium silicate by thermal method, and then pulverized with a meat grinder and then polarized. To 425 µm or less, 425 µm to 1.18 mm, or 1.18 mm or more of powder. The polarized powder was heated to about 180 ° C. to foam, thereby obtaining inorganic foam powder and granules for the examples.

Example 4

The same procedure as in Example 3 was carried out except that 480 g of metakaolin was added to potassium silica.

Example 5

In Example 1 to 4, after weighing 500 g of the powder obtained by foaming the powder polarized to 425㎛ or less after grinding with a meat grinder, fly ash (Fly ash) purchased from Nikon Co., Ltd. as a starting material of the geopolymer. ) 50 g of ocher purchased from Gochang ocher as an additive and 250 g of three types of liquid water glass (Youngil Chemical), an active agent of geopolymer, and 25 g of sodium hydroxide (NaOH), and then a mold of 30 × 30 cm Compression molding. After pressing the compressed molded body in a zipper bag so that moisture does not escape, it was left at room temperature for one day and then heated and dried in a dry oven at 100 ℃ to prepare an inorganic panel similar to the gypsum board.

Example 6

500 g of the powder obtained by foaming the powder polarized in the range of 425 μm to 1.18 mm after grinding with a meat grinder in Examples 1 to 4 was measured and then purchased from METACON Co., Ltd. as a starting material of the geopolymer. 30 x 30 after uniformly mixing 90 g of kaolin, 20 g of natural fiber (15 mm average) of additives, 250 g of liquid potassium silicate (Youngil Chemical), and 25 g of potassium hydroxide (KOH), an active agent of geopolymer Compression molded into cm molds. Put the compressed molded body into a PE coated aluminum zipper bag to prevent moisture from being drained, and leave it in a dry oven at 50 ℃ for one day, then take it out into the air, and heat and dry it using a 700-watt household microwave oven. Inorganic panel for insulating board was prepared.

Example 7

500 g of the powder obtained by foaming the powder polarized to 1.18 mm or more after pulverizing with a meat grinder in Examples 1 to 4 and 20 g of the foamed silica gel foam by heating the hygroscopic silica gel at 1,100 ° C. to improve the physical properties of the insulating material. After the measurement, 90 g of metakaolin purchased from Nikon Co., Ltd., an additive of Geopolymer Co., Ltd., 25 g of acrylic emulsion resin and 250 g of liquid potassium silicate (young-ilhwa), an active agent of geopolymer. And 25 g of potassium hydroxide (KOH) were uniformly mixed and compression molded into a mold of 30 × 30 cm. Put the compressed molded product into a PE coated aluminum zipper bag to prevent moisture from being drained, and leave it in a dry oven at 50 ℃ for one day, then take it out into the air, and heat and dry it using a 700-watt home microwave oven. A panel for an inorganic lightweight board was prepared.

Comparative Example 1

In Example 1 to 4, after weighing 500 g of the powder obtained by foaming the powder polarized to 425 μm or less after crushing with a meat grinder, 250 g of three liquid water glass (Youngilsung) were supplied to an inorganic binder, and mixed uniformly. Then, compression molding into a mold of 30 × 30 cm, and heated and dried in a dry oven at 100 ℃ to prepare an inorganic panel for the finished board similar to the shape of gypsum board.

Comparative Example 2

In Example 1 to 4, after grinding 500 g of the powder obtained by foaming the powder polarized in the range of 425 μm to 1.18 mm after grinding with a meat grinder, 250 g of liquid potassium silicate (Immilization) was supplied to an inorganic binder, After homogeneously mixing, compression molding was carried out to a mold of 30 × 30 cm, and heated and dried using a 700 W home microwave oven to prepare an inorganic panel for insulating boards having a shape similar to that of Sirutteok.

Comparative Example 3

In Examples 1 to 4, after weighing 500 g of the powder obtained by foaming the powder polarized to 1.18 mm or more after pulverizing with a meat grinder, 250 g of potassium silicate (Iilization) was mixed with an inorganic binder, and then 30 × 30 cm After compression molding in a mold, using a 700 W domestic microwave oven was heated and dried to prepare a panel for inorganic lightweight boards similar to styrofoam.

The results of Example 5 and Comparative Example 1 are shown in Table 1, the results of Example 6 and Comparative Example 2 are shown in Table 2, and the results of Example 7 and Comparative Example 3 are shown in Table 3.

Specific gravity of the analysis items of the foamed molded article provided in this Example and Comparative Example was carried out by KS L 3114, compressive strength was carried out by KS F 2405, tensile strength was carried out by KS F 2423, water resistance part of the prepared foamed molded article Extraction was carried out in boiling water and the time when the body was dismantled was measured.

Table 1 (Results of Example 5 and Comparative Example 1)

division Analysis item importance
(g / cm2) Compressive strength
(kgf / cm2) The tensile strength
(kgf / cm2) Water resistance
(time)

room
city
Yes
5 425 μm or less of Example 1
Foam of polarized powder 1.12 54.6 5.94 2 hours
More than 425 μm or less of Example 2
Foam of polarized powder 1.20 58.4 6.28 2 hours
More than 425 μm or less of Example 3
Foam of polarized powder 1.15 53.8 5.82 2 hours
More than To 425 μm or less of Example 4
Foam of polarized powder 1.21 58.8 6.19 2 hours
More than

ratio
School
Yes
One 425 μm or less of Example 1
Foam of polarized powder 1.11 26.4 3.23 10 seconds
Within 425 μm or less of Example 2
Foam of polarized powder 1.14 32.4 3.28 10 seconds
Within 425 μm or less of Example 3
Foam of polarized powder 1.12 24.8 3.25 10 seconds
Within To 425 μm or less of Example 4
Foam of polarized powder 1.14 31.9 3.31 10 seconds
Within

As shown in Table 1, an inorganic panel for a finishing board such as a gypsum board was prepared by using a powder obtained by thermally and chemically solidifying liquid sodium silicate, pulverizing it, and then foaming powder polarized to 425 μm or less. In Comparative Example 1, the specific gravity ranged from 1.11 to 1.14 when simply used as a binder of liquid sodium silicate, and the compressive strength was 24 to 26 kgf / cm2 when the silicate was simply used. The addition of aluminosilicate-based fly ash or metakaolin, which can provide 31-32 kgf / cm2, was shown to be somewhat compressive due to the material that could provide geopolymer inside the foamed sodium silicate. It can be explained that the improvement.

In addition, the tensile strength was 3.2 ~ 3.3 kgf / ㎠ showed a relatively low physical properties of the insulation, especially in the case of water resistance, the molded body is all released into the water within 10 seconds can not provide any water resistance, whereas in Example 5 the specific gravity is compared In spite of the similar results as in the example, the compressive strength and the tensile strength were increased by almost 2 times, and in particular, the water resistance was greatly increased, which was formed by forming the three-dimensional inorganic network by the geopolymer binders. In addition to improving the binding force of the particles contained in the upper body was confirmed that the water resistance is greatly improved.

Table 2 (Results of Example 6 and Comparative Example 2)

division Analysis item importance
(g / cm3) Compressive strength
(kgf / cm2) The tensile strength
(kgf / cm2) Water resistance
(time)

room
city
Yes
6 Foam of Powder Polarized to 425 μm to 1.18 mm of Example 1 0.31 36.2 6.26 2 hours
More than Foam of Powder Polarized to 425 μm to 1.18 mm of Example 2 0.34 38.8 6.88 2 hours
More than Foam of Powder Polarized to 425 μm to 1.18 mm of Example 3 0.30 35.8 5.95 2 hours
More than Foam of Powder Polarized to 425 μm to 1.18 mm of Example 4 0.34 39.1 6.12 2 hours
More than

ratio
School
Yes
2 Foam of Powder Polarized to 425 μm to 1.18 mm of Example 1 0.29 12.4 2.26 10 seconds
Within Foam of Powder Polarized to 425 μm to 1.18 mm of Example 2 0.31 12.8 2.34 10 seconds
Within Foam of Powder Polarized to 425 μm to 1.18 mm of Example 3 0.30 11.8 2.29 10 seconds
Within Foam of Powder Polarized to 425 μm to 1.18 mm of Example 4 0.31 12.6 2.38 10 seconds
Within

As shown in Table 2, thermally and chemically solidified liquid sodium silicate was pulverized, and then the powder obtained by foaming polarized powder in the range of 425 μm to 1.18 mm was used to insulate a shape similar to that of Shiru-teok. As a result of manufacturing the inorganic panel for the board, the results were similar to those of Example 5, and although the specific gravity was much lower than that of Example 5, the physical properties of the inorganic insulating material by the geopolymer were found to be high, in particular, the wet state. Increasing the curing temperature at was confirmed that the physical properties are further improved. In addition, it was confirmed that the tensile strength was greatly increased by adding fiber in the molded body.

Table 3 (Results of Example 7 and Comparative Example 3)

division Analysis item importance
(g / cm3) Compressive strength
(kgf / cm2) The tensile strength
(kgf / cm2) Water resistance
(time)

room
city
Yes
7 Foam of Powder Polarized to 1.18 mm or More of Example 1 0.154 32.4 4.98 2 hours
More than Foam of Powder Polarized to 1.18 mm or More of Example 2 0.176 33.8 5.24 2 hours
More than Foam of Powder Polarized to 1.18 mm or More of Example 3 0.160 32.6 5.06 2 hours
More than Foam of Powder Polarized to 1.18 mm or More of Example 4 0.178 33.7 5.32 2 hours
More than

ratio
School
Yes
3 Foam of Powder Polarized to 1.18 mm or More of Example 1 0.150 10.4 1.88 10 seconds
Within Foam of Powder Polarized to 1.18 mm or More of Example 2 0.168 11.2 2.05 10 seconds
Within Foam of Powder Polarized to 1.18 mm or More of Example 3 0.158 10.8 1.92 10 seconds
Within Foam of Powder Polarized to 1.18 mm or More of Example 4 0.171 11.5 2.14 10 seconds
Within

As shown in Table 3, for inorganic lightweight boards having a shape similar to that of styrofoam, using a powder obtained by thermally and chemically solidifying liquid sodium silicate and pulverizing the meat seasoning machine and then foaming the powder polarized to a range of 1.18 mm or more. As a result of manufacturing the panel, the results were similar to those of Examples 5 and 6, and although the specific gravity was much lower than that of Example 5, the physical properties of the inorganic insulating material by the geopolymer were found to be high, especially the curing temperature in the wet state. As you increase the physical properties were confirmed to be further improved. In addition, the silica gel is heated at a high temperature to improve the physical properties of the insulating material, thereby supplying foamed silica foam, thereby lowering the specific gravity of the molded body to increase the insulation effect and sound insulation effect, and by adding an acrylic emulsion resin to the inside of the molded body. In addition to improving the water resistance by forming a polymer film, the surface was smooth.

Accordingly, the present invention provides a conventional method such as styrofoam or foamed polyurethane having excellent thermal insulation effect through an inorganic insulating material manufacturing method having excellent physical properties in the field of overall insulation and soundproofing material in order to check the functionality for improving the indoor environment and atmosphere of modern people. It can be confirmed that a high-strength and water-resistant non-flammable ultra-light foamed ceramic having excellent economic feasibility to sufficiently replace the flammable foamable resin can be prepared in a large amount in a short time through the binder of the geopolymer.

The manufacturing process diagram shown in FIG. 1 of the present application shows a schematic manufacturing process diagram for obtaining an inorganic foam using a geopolymer for improving durability and water resistance in the present application, and is already described in the detailed description of the present invention. 2 is a photographic view of the insulating molded article made while performing the embodiment of the present application, the photographic view of Figure 2a is a photographic view of one side of the inorganic panel for finishing boards shaped like gypsum board. This is a photograph that can be confirmed that can be provided as a substantially high and very solid inorganic panel, the photograph of Figure 2b is a side view of the embodiment provided as an inorganic panel for insulation board by compression molding the foamed inorganic powder As a photographic figure, it can be seen that the compact inorganic particles foamed form a shape, and the photographic figure of FIG. Compression molding of granules to form an inorganic panel for insulation boards having a shape similar to Styrofoam. A photographic view showing one side of the embodiment can be manufactured as a molded article for insulation and sound insulation according to the application regardless of fine particles or granules. It is a photograph figure showing.

Claims (12)

In the method of manufacturing an inorganic foamed molded article that can provide excellent heat insulation and soundproofing properties and provide water resistance, durability and non-combustibility by using a geopolymer as a binder,
Oxygen atoms are alternately shared between SiO ₄ and AlO ₄ tetrahedron to form geopolymers, three-dimensional network macromolecules in the form of Si-O-Al-O bonds, and to provide excellent insulation and sound insulation. Liquid silicate selected from liquid sodium silicate, potassium silicate, lithium silicate and sodium aluminum silicate is dried by a thermal method to obtain a solid phase silicate, or precipitated by a water-soluble organic solvent by a chemical method. Obtaining the solidified silicate, foaming the solidified silicate at a temperature range of 90 ~ 350 ℃, and obtains the inorganic foam powder and granule (Granule) to obtain the polarized powder and granules through a sieving process step;
In order to provide a geopolymer to obtain a foamed molded article having excellent binding force, a molecular formula of (Si ₂ O ₅ , Al ₂ O ₂ ) n is provided in the feeding step of the alumina silicate powder raw material, which is the starting material of the geopolymer. In order to form a gel of amorphous aluminosilicate composed of O-bonds, a powder selected from minerals consisting of alumina-silicate oxides, fly ash, and furnace slag is selected. A second step of providing 5 to 150 parts by weight of the inorganic foam powder and granules obtained in the first step based on 100 parts by weight;
Alkali activators during the formation of geopolymers include sodium hydroxide (NaOH), sodium carbonate (Na ₂ CO ₃ ), potassium hydroxide (KOH), potassium carbonate (K ₂ CO ₃ ), calcium hydroxide (Ca (OH) ₂ ), calcium oxide ( A third step of supplying an alkali metal such that one or more alkali metals selected from CaO) are added to maintain a pH of the mixed composition with the alumina silicate powder raw material obtained in the second step in the range of 11 to 13;
Ceramics that can emit far infrared rays and anions to enhance functionality during the formation of geopolymers, adsorbents for adsorbing harmful gases in the atmosphere, fibers for improving the bending strength of foamed molded products, polymers for improving the water resistance of foamed molded products An additive supplying step in which an additive selected from the group is added to 40 parts by weight or less based on 100 parts by weight of the raw material powder prepared in the third step;
A molding step, curing step, and heating step of uniformly mixing the raw materials prepared up to the first to the additive supplying step to a predetermined size and shape;
Method for producing an inorganic foamed product using a geopolymer as a binder, characterized in that applied to obtain an inorganic foamed product through. delete delete delete delete The method of claim 1,
The molding step is a method for producing an inorganic foamed molded product characterized in that the molding method selected from compression molding or rolling molding is applied. The method of claim 1,
In the curing step, the water supply method selected from aquatic curing, spraying curing and wet curing is selected, and the method of preventing the moisture from the film curing or sheet curing is selected, the curing at 5 ~ 95 ℃ temperature conditions Method for producing an inorganic foamed molded article. The method of claim 1,
In the heating step, the inorganic foamed molded product characterized in that the heating method selected from near-infrared heating method, infrared heating method, microwave heating method, hot air heating method by oven, hot plate direct heating method is applied. Way. The method of claim 1,
In the inorganic foam powder and granules providing step, when the inorganic powder or granules based on 100 parts by weight based on the foamed perlite (Perlite), vermiculite (Vermuculite), silica gel (Silica gel), aerogel (Aerogel), A method for producing an inorganic foamed molded product characterized by adding an inorganic foam selected from volcanic stone and zeolite to 45 parts by weight or less. The method of claim 1,
In the above additive supply step, elvan, ocher, olivine, silicate, silica mineral, diatomite, wollastonite, pyrophyllite, dolomite, and lithium minerals of 400 μm or less ), Magnesite, Bauxite, Bentonite, Pumice, Borate, Serpentine, Acid clay, Iron Oxide, Garnet ), Carbonate Minerals, Attapulgite, Zeolite, Sepiolite, Nephrite, Apatite, Illite-Mica, Feldspar , Barite, Talc, Diatomaceous earth, Graphite, Hectorite, Clay Minerals, Zirconium Minerals, Titanium Minerals, Tours From tourmaine, tourmaline, fume silica, aerogel Method for manufacturing a ceramic, characterized in that the flow is chosen to be used inorganic foamed molded product. The method of claim 1,
In the additive supplying step, an adsorbent for adsorbing harmful gases in the atmosphere is used, and activated carbon having a specific surface area of 700 to 1,800 m ² / g is added as an additive or activated carbon fiber is used as an adsorbent for harmful gases. Method for producing an inorganic foam molded article. The method of claim 1,
In the additive supplying step, fibers are used to improve the bending strength of the foamed molded product, and the fibers are seedling fibers, bast fibers, salt vein fibers, cellulose fibers of fruit fibers, protein fibers in the form of strips or filaments, and mineral fibers. Inorganic foaming, characterized in that selected from metal fibers, glass fibers, rock fibers, slag fibers, inorganic fibers of carbon fiber, the thickness of the fiber is 3 to 50 ㎛, the length of the fiber is used in the range of 1 to 50 mm Method of manufacturing the form.

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