KR20130100939A - Fire resistant curtain wall light weight board - Google Patents

Abstract

PURPOSE: A light weight inorganic foaming fireproof board for a fire-resistant curtain wall is provided to prevent a spread of fire in a skyscraper building by using fly ash, silica fume, fumed silica and inorganic foaming agent to replace an organic insulating material and inorganic fiber. CONSTITUTION: A manufacturing method of a light weight inorganic foaming fireproof board for a fire-resistant curtain wall comprises the following steps. An admixture, sludge and additive are mixed and a first pulverized body is manufactured. An inorganic foaming agent is added in the first pulverized body and the second pulverized body is manufactured. 1-50 parts by weight of a mixed solution of water and sodium silicate is mixed base on 100.0 parts by weight of the second pulverized body and foaming body is manufactured. Moisture and an organic compound which are contained in the foam are evaporated, and plasticized at 700-780°C. The admixture is selected from fly ash, a silicate powder or a mixture thereof. The sludge is selected from a waste glass powder, sludge from glass polishing process or a mixture thereof. The additive is selected from silica fume, and a ground granulated blast furnace slag or a mixture thereof. The inorganic foaming agent is any one which is selected from graphite, a ferric oxide and sodium silicate.

Description

Lightweight inorganic foam fireproof board for fireproof curtain wall

The present invention relates to a lightweight inorganic foam fireproof board for a fire resistant curtain wall applied to a high-rise building, in particular, to replace the organic insulation and fibers and inorganic fibers pointed out as a problem in the event of a fire of the aluminum curtain wall and to prevent fire spread of the high-rise building It relates to a lightweight inorganic foam fireproof board for a fire-resistant curtain wall used.

Aluminum and glass are the main materials of the high-rise building curtain wall system. Currently, the unit is a unit system composed of these materials to finish the outer wall of the high-rise building. In addition, the aluminum composite panel for curtain wall system uses mineral wool, glass wool or organic materials as insulation material inside the panel to improve insulation performance. However, mineral wool and glass wool, which are inorganic materials, are vulnerable to moisture, and agglomeration and sagging occur, resulting in poor thermal insulation. Polyester, organic materials, etc., are limited to building applications due to fire vulnerability and human hazards caused by carbon monoxide. Has

In accordance with the high-rise large-scale construction of domestic buildings, lightweight curtain wall systems made of aluminum and glass are mainly used. The lightweight curtain wall system is absolutely required to reduce the weight of building materials and wind pressure characteristics to prevent wind damage. However, the existing curtain wall material aluminum and glass is limited in preventing the propagation of interlayer fire due to the lack of fire and fire resistance. In particular, as shown in the fire propagation of a high-rise building, lightweight aluminum melts into heat and the fire spreads between floors, so it is necessary to take measures to prevent the expansion of combustion between curtain wall sections. Fire resistance such as heat shielding and flame retardant is necessary to prevent the expansion of fire and combustion. However, current curtain wall material cannot secure the expansion of combustion between fire compartments.

In addition, the thermal conductivity of aluminum and glass, which is the existing curtain wall material, is very high, ranging from 0.6 to 1.0 kcal / mh.Therefore, there is a limit in energy saving. Therefore, aluminum composite panels are inorganic mineral wool and glass wool and organic polyester as an insulation material inside the panel. Materials such as wool and polyurethane should be used.

Inorganic thermal insulation materials are not only difficult to process in the form of panels alone, but also have poor water resistance, and still have poor workability because the thermal insulation performance is significantly lower than that of organic thermal insulation materials, and the weight is heavy. Recently, there has been a study on the manufacture of insulation boards using low-weight artificial lightweight materials (0.4-0.5g / cm ² ), but the thermal conductivity of the board is still much lower than that of general organic insulation materials.

In addition, due to the nature of the material, the inorganic system is vulnerable to moisture, causing agglomeration and sagging, so that the thermal insulation is poor.

An object of the present invention is to solve the problems as described above, to provide a lightweight inorganic foam fireproof board for curtain walls that can improve the fire resistance of the existing aluminum curtain wall system and improve the vulnerability of high-rise buildings due to fire. It is for.

Another object of the present invention is to provide a lightweight inorganic foam fireproof board made of a composition of the inorganic binder.

Still another object of the present invention is to provide a lightweight inorganic foam fireproof board which can apply the inorganic binder composition or the lightweight inorganic foam fireproof board of the present invention to an exterior wall of an aluminum curtain wall.

In order to achieve the above object, the inventor of the present invention uses an amorphous composition and fine powder such as fly ash, silica fume, fumed silica, waste glass powder and blowing agent for use as a binder, and the composition as essential ingredients. By discovering that the lightweight inorganic foamed fireproof board manufactured by using and applied to aluminum curtain wall of high-rise building can block vertical fire propagation and secure fire resistance of high-rise building aluminum curtain wall that requires fire prevention performance. The invention was completed.

Lightweight inorganic foamed fireproof board for high-rise building aluminum curtain wall according to the present invention for achieving the above object is a lightweight inorganic foamed fireproof board for high-rise building aluminum curtain wall, fly ash, silica powder or a mixture thereof is selected from, and waste 1st powder which mixed the sludge selected from glass powder, glass polishing sludge, or mixtures thereof, and 1 type chosen from the group which consists of silica fume, blast furnace slag fine powder, or mixtures thereof; Mixed water obtained by adding any one inorganic blowing agent selected from the group consisting of graphite, iron oxide and sodium silicate to the first powder to prepare a second powder, and then mixing sodium silicate and water in the second powder To prepare a foam by mixing 1 to 50 parts by weight with respect to 100 parts by weight of the second powder, and after evaporating the water and organic matter contained in the prepared foam, it is characterized in that the fired at 700 ~ 780 ℃.

In addition, in the lightweight inorganic foaming fireproof board for a high-rise building aluminum curtain wall according to the present invention, by using a first powder prepared by adding 5 to 20% by weight of fumed silica to 100% by weight of the first powder A second powder is produced.

According to the lightweight inorganic foam fireproof board for a high-rise building aluminum curtain wall according to the present invention, it is possible to improve the fire resistance performance of the high-rise building aluminum curtain wall and to effectively spread the fire propagation between layers generated from the organic insulation and inorganic fiber insulation of the existing aluminum curtain wall. It can be prevented. In recent years, as the construction of high-rise buildings is more frequent, the risk of fire is also increasing. By applying a lightweight inorganic foam fireproof board according to the present invention, fire safety can be improved. At present, the composition of the inorganic board for securing the safety against fire is mostly made of gypsum board or calcium silicate-based material, but because of the heavy bonding is difficult to secure fire resistance performance. In addition, gypsum board or calcium silicate board is weak in moisture and has the disadvantage of being easily broken.

In addition, according to the light-weight inorganic foam fireproof board for high-rise building aluminum curtain wall according to the present invention, a technique for replacing the portion of the polyester wool and glass wool, which is used as an insulation material in the aluminum curtain wall structure with a lightweight inorganic foam fireproof panel of a non-combustible material As it not only prevents the propagation of fire resulting from the lack of fire resistance of existing insulation materials, but also has excellent thermal insulation performance, the usability is excellent.

In addition, according to the light-weight inorganic foam fireproof board for high-rise building aluminum curtain wall according to the present invention, the excellent fire resistance performance compared to the existing heat insulating material and the strength and low absorption rate compared to the refractory materials such as gypsum board, construction convenience and Excellent in utilization.

In addition, according to the light-weight inorganic foam fireproof board for high-rise building aluminum curtain wall according to the present invention, it is possible to secure the relevant new technology because of the wide range of application, it is possible to increase the domestic technical skills according to the development and commercialization of related products, To secure world-class leading technology.

1 is a schematic diagram of an aluminum curtain wall system to which a lightweight inorganic foam fireproof board according to the present invention is applied.
Figure 2 is a schematic diagram showing the foaming mechanism of the inorganic foaming agent for the manufacture of a lightweight inorganic foaming fireproof board according to the present invention.
Figure 3 is an electron micrograph showing the microstructure inside the composition for the manufacture of a lightweight inorganic foam fireproof board according to the present invention.
4 is a fire example of an aluminum curtain wall.

These and other objects and novel features of the present invention will become more apparent from the description of the present specification and the accompanying drawings.

Hereinafter, the present invention will be described in more detail.

In the present invention, a mixed material selected from fly ash, silica powder or a mixture thereof; and a sludge selected from waste glass powder, glass polishing sludge or a mixture thereof; and graphite, iron oxide (Fe ₂ O ₃ ), sodium silicate Any one inorganic blowing agent selected from the group consisting of (Na ₂ SiO ₃ ); And an additive selected from the group consisting of silica fume, blast furnace slag fine powder or mixtures thereof, and an additive of 10 to 40 wt% based on the mixture of the admixture, the sludge and the inorganic blowing agent; Disclosed is a composition which is added to comprise 5-20% by weight of fumed silica relative to the added and mixed mixture.

In addition, in the present invention, a powder of the composition disclosed above is prepared, and a small amount of mixed water prepared by mixing sodium silicate and water in a ratio of 7: 3 is prepared to prepare a foam to mix well. Disclosed is an inorganic foam fireproof board for a fire-resistant curtain wall which is completely dried by evaporating moisture and organic substances contained in the prepared foam, and then fired at 700 to 780 ° C using an electric furnace.

Here, it is preferable that the said mixed water mixes 1-50 weight part with respect to 100 weight part of said powders.

According to the present invention, in the composition for producing a high refractory lightweight inorganic foam fireproof board, the content of fly ash and silica powder, silica fume and blast furnace slag powder, fumed silica is 10 to 40% by weight, 10 to 40% by weight, respectively %, 5-20 weight% is preferable, for the following reason.

Fly ash, silica powder, silica fume and fumed silica are used as functional materials for imparting filler role and functionality to the foam. Among them, fly ash and silica powder are the most widely used admixtures, and because they can hardly bond themselves, they are widely used because they are inexpensive as industrial by-products. If the content of fly ash and silica powder in the present composition is less than 10% by weight, the workability of the lightweight inorganic foam fireproof board is greatly reduced and heavy, and if it exceeds 40% by weight, the foam cannot be sufficiently produced and the foam cannot be produced. The effect of improving the is low.

Lighter foams can be produced than incorporating silica fume and blast furnace slag but are more expensive than fly ash. If the content of silica fume is less than 10% by weight, the workability during the manufacture of the inorganic binder refractory board is greatly lowered. If the content of the silica fume is more than 40% by weight, the surface structure of the composition is not dense and the effect of improving the strength is low.

Among the compositions for manufacturing a lightweight inorganic foam fireproof board according to the present invention, fumed silica, which can be applied by mixing with fly ash, silica powder and silica fume, has its own internal pores, thus not only acting as a microfiller but also having an ultralight It can be used in the production of foam, and has a superior effect in the production of foam than in the case of mixing fly ash, which is a mixed material. Fumed silica can be used in a mixture of 5 to 20% by weight. If the weight is less than 5% by weight, the thermal insulation performance of the inorganic foam fireproof board is not greatly improved. If the content exceeds 20% by weight, the foam production and strength are improved. The effect is low.

In the composition for producing a lightweight inorganic foam fireproof board according to the present invention, the waste glass powder or glass abrasive sludge is softened to form a skeleton of the inorganic foam panel. If the strength is reduced and exceeds 90% by weight, the strength is improved, but the weight is heavy, so that the lightweight panel cannot be manufactured and the workability is reduced.

The waste glass powder or glass polishing sludge has a softening point around about 600 ° C., and then uses a feature in which the effect of the blowing agent is expressed by melting the glass at about 700 ° C. As shown in FIG. 2 (a), uniform mixing is important as the glass powder or glass polishing sludge is mixed with a blowing agent, and it is important to surround the blowing agent with glass as shown in FIG. To this end, the softening point of the glass powder or glass abrasive sludge itself should be lower than the temperature of the blowing agent, and the size of the glass powder or glass abrasive sludge particles may also act as a variable. This generated gas makes a waste hole inside the lightweight glass as shown in FIG. When a foaming agent is added to glass powder or glass polishing sludge and fired at a certain temperature, the glass surrounding the foaming agent is melted, and at the same time, gas is generated by decomposition of the blowing agent itself or reaction with the glass component. And it is possible to manufacture a lightweight inorganic foam fireproof board by immobilizing and stabilizing itself.

The inorganic foaming agent is used in the composition for manufacturing the lightweight inorganic foaming fireproof board according to the present invention, and the inorganic foaming agent may be graphite, calcium carbonate (CaCO ₃ ), iron oxide (Fe ₂ O ₃ ), sodium silicate, or the like. The blowing agents differ in gas generation method as described below depending on the respective properties.

Graphite + O ₂ → CO ₂

CaCO ₃ → CaO + CO ₂

2Fe ₂ O ₃ → 4FeO + O ₂

The inorganic foaming agent uses 0.1 to 5.0% by weight, but if less than 0.1% by weight, it is not foamed, so it is impossible to manufacture a lightweight inorganic foam fireproof board. Panels cannot be manufactured.

Lightweight inorganic foam fireproof board according to the present invention can be used to manufacture a lightweight inorganic foam fireproof board by firing and cutting the product. Lightweight inorganic foam fireproof board according to the present invention, unlike the gypsum board or calcium silicate board using a natural raw material is an industrial by-product fly ash is advantageous in terms of economics. In addition, since a large amount of fly ash is generated as an industrial by-product in Korea, it can actively respond to the development of products for the replacement of natural resources and high value-added.

Hereinafter, preferred embodiments of the present invention will be described in more detail.

This invention is not limited to the Example demonstrated below, Of course, it can change in various ways in the range which does not deviate from the summary.

Example 1

1,000 g of fly ash, 1,000 g of silica fume, and about 3,000 to 3,500 cm 2 of waste glass powder and 5,000 g of glass abrasive sludge were used. Waste glass powder and glass polished sludge were found to be soda-lime glass similar to the general glass composition, and the specific gravity of glass powder and glass polished sludge was 2.5 g / cm 3. The SiO ₂ content was 64 to 72% and Na ₂ O was 3 to 9%, and the loss on ignition was 2 to 7%.

Powder was prepared by adding 50 g of graphite as a blowing agent to the powder mixed with fly ash, silica fume and waste glass powder.

The foam was prepared to mix well by mixing a small amount of the mixed water prepared at a ratio of sodium silicate and water to 7: 3 in the prepared powder, and the prepared foam was evaporated with water and organic matter so that the water content was close to 0%. At this time, if moisture is not completely dried, a large amount of water vapor and gas are generated at the inlet part due to dehydration and volatilization of organic matter in the electric furnace during firing, which causes a problem that the molded bodies are agglomerated or cracked.

Firing was performed using an electric furnace and firing at 700 to 780 ° C. The firing temperature shows a completely different shape such as over-expanding depending on the added material or blowing agent, the compressive strength and absorption rate also change, and the shape of the outer coating also changes, so consider the conditions of foaming in the shortest possible time. The foamed foam was cut to the upper end and the lower end to produce a lightweight inorganic foam fireproof board.

As a result of measuring the properties of the prepared inorganic foam fireproof board, the density was 0.44 g / cm 3, the compressive strength was 55.8 kg / cm 2, and the thermal conductivity was 0.12 W / mK.

Claims (2)

In the lightweight inorganic foam fireproof board for high-rise building aluminum curtain wall,
Admixture selected from fly ash, silica powder or mixtures thereof;
Sludge selected from waste glass powder, glass polishing sludge or mixtures thereof,
A first powder obtained by mixing one kind selected from the group consisting of silica fume, blast furnace slag fine powder or a mixture thereof;
After adding the inorganic blowing agent selected from the group consisting of graphite, iron oxide, sodium silicate to the first powder to prepare a second powder,
1 to 50 parts by weight of a mixed water obtained by mixing sodium silicate and water in the second powder is mixed with respect to 100 parts by weight of the second powder to prepare a foam, and the water and organic matter contained in the prepared foam are evaporated. A lightweight inorganic foam fireproof board for a high-rise building aluminum curtain wall, which is then fired at 700 to 780 ° C. The method of claim 1,
Lightweight inorganic foam for high-rise building aluminum curtain walls, characterized in that the second powder is prepared using the first powder prepared by adding 5-20% by weight of fumed silica to 100% by weight of the first powder. Fireproof board.

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