KR20100012554A - Interior and exterior decorative finish containing foam glass - Google Patents

Abstract

PURPOSE: An interior and exterior decorative material containing a foam glass is provided to enhance the thermal efficiency by blocking the hot and cold air from outside in summer and winter and by showing excellent thermal insulation than the existing decorative materials. CONSTITUTION: An interior and exterior decorative material is manufactured by 30~90 parts by weight of a gypsum and 10~70 parts by weight of a foam glass from total 100 parts by weight of the composition. The gypsum is a hemihydrates, an anhydrous gypsum. The foam glass is manufactured by foaming an alkali series glass or a non-alkali system glass. The interior and exterior decorative material contains one substance additionally from the group of a foaming agent, a color additive, a coupling reinforcing agent, and a hardener in the total weight of the composition. The interior and exterior decorative material is a gypsum board or a sandwich panel.

Description

Interior and exterior materials containing foamed glass {INTERIOR AND EXTERIOR DECORATIVE FINISH CONTAINING FOAM GLASS}

The present invention relates to lightweight interior and exterior materials with improved insulation and / or sound absorption made from gypsum compositions containing foamed glass.

In order to maintain the insulation performance of the panels, etc., which are conventionally used as interior materials for building, a method of embedding insulation on a concrete wall and placing gypsum board on the outside, or inserting a reinforcement panel with insulation in a gypsum board, etc. This was used.

However, when the insulation is directly embedded in the interior and exterior materials such as gypsum board, there is a disadvantage in that it is inconvenient because a separate reinforcement panel is required to embed the insulation.

 On the other hand, one of the main functions of the interior and exterior materials for building constituting a variety of living space is to block the noise. Conventionally, in order to cut off the noise, a method of manufacturing one by overlapping a gypsum board or the like is used. However, according to the above method, there is a problem in that it is expensive and difficult to construct such as bonding of materials.

The present invention has been made in view of the above-described point, and an object thereof is to provide interior and exterior materials such as gypsum board having improved heat insulation and / or sound absorption.

The present invention for achieving the object as described above, with respect to the total 100 parts by weight of the composition, improved heat insulating and / or sound absorption is made of a gypsum composition comprising 30 to 90 parts by weight of gypsum and 10 to 70 parts by weight of foam glass Provide interior and exterior materials.

Since the interior and exterior materials manufactured from the gypsum composition containing foamed glass according to the present invention exhibit an excellent thermal insulation effect than the conventional interior and exterior materials, it is easy to control the indoor temperature because it blocks heat and cold air outside in summer and winter to increase thermal efficiency. There is an advantage.

In addition, the interior and exterior materials also have an excellent sound absorption effect, there is an advantage that the transmission of noise is reduced.

In addition, since the interior and exterior materials are durable yet lightweight, there is an advantage that the construction period is easy to shorten the construction period.

Hereinafter, the present invention will be described in detail.

The interior and exterior materials according to the present invention is characterized in that it is made of a gypsum composition comprising 30 to 90 parts by weight of gypsum and 10 to 70 parts by weight of foamed glass based on 100 parts by weight of the total composition.

Recently, there have been attempts to provide interior and exterior materials, such as gypsum board, in which mechanical strength and the like are improved by controlling the composition and composition ratio of each constituent material included in the gypsum composition, but to date gypsum compositions containing foam glass as an active ingredient. Interior and exterior materials, such as gypsum board manufactured by is not manufactured. In particular, in order to improve insulation or sound absorption, no foamed glass was used as the composition of the gypsum board. MEANS TO SOLVE THE PROBLEM This inventor carried out numerous research and experiments to improve the heat insulation and / or sound absorption of the interior and exterior materials, such as a gypsum board manufactured by the gypsum composition, and at the same time produce a low specific gravity, lightweight interior and exterior materials. In the case of the interior and exterior materials made of the gypsum composition comprising a, it was found that the thermal insulation and / or sound absorption is superior to the interior and exterior materials made of a gypsum composition containing no foam glass.

The interior and exterior materials of the present invention are made of a gypsum composition comprising 30 to 90 parts by weight of gypsum and 10 to 70 parts by weight of foamed glass with respect to 100 parts by weight of the composition in order to improve insulation and / or sound absorption.

In the present invention, the gypsum composition, as a composition containing gypsum and foam glass as an active ingredient, may further include a separate configuration such as additives.

In the present invention, the foamed glass contained in the gypsum composition is a material which foams homogeneous pores in the glass so as to have the properties of the glass itself and the properties resulting from the substrate structure. Can be used. The foam glass is an environmentally friendly material capable of recycling waste resources and recycling after disposal. In addition, due to the uniform foam of the material, it has high light weight, sound absorption which blocks and absorbs noise and vibration, and in addition, it has the characteristics of heat insulation, heat insulation, high fire resistance and non-combustibility, steel acid resistance, and corrosion resistance of steel And it has the advantage of easy processing.

The foamed glass may be included in an amount of preferably 10 to 70 parts by weight based on 100 parts by weight of the gypsum composition according to the present invention. If less than 10 parts by weight may be difficult to manufacture light and excellent insulation and sound absorption, interior and exterior materials, if more than 70 parts by weight may be difficult to manufacture excellent interior and exterior materials. On the other hand, the foamed glass may be commercially available or manufactured directly. When using a directly manufactured thing, it can manufacture by foaming alkali glass, an alkali free glass, or both. The alkali glass may contain SiO ₂ , Al ₂ O ₃ , a complex of Na ₂ O and K ₂ O, a complex of CaO and MgO, and the like, and the alkali free glass may be SiO ₂ , Al ₂ O. ₃ , B ₂ O ₃ , a complex of CaO and MgO, and the like may be included as a component. In one embodiment, an alkali-based glass, an alkali-free glass and a foaming agent prepared by foaming at a predetermined temperature may be used. The foaming temperature is controlled to be equal to or higher than the foaming temperature of the alkali-based glass and lower than the foaming temperature of the alkali-free glass included therein, so that the alkali-based glass particles are first softened to have fluidity, and thus the non-softened alkali-free system. It is also possible to prepare and use a high strength foam glass prepared to react with the glass to form a solid solution containing Al ₂ O ₃ and B ₂ O ₃ components at the interface of the alkali-free glass particles. In addition, in the production of foam glass, kaolin, coal ash, limestone, inorganic binder, organic binder, caustic soda may be further contained.

In the present invention, the gypsum contained in the gypsum composition may be a calcined gypsum, anhydrous gypsum, or a mixture of both. The hemihydrate gypsum and anhydrous gypsum may contain CaO, SO ₃ , Crystalline Water as a component. Hemihydrate gypsum, that is, calcium sulfate hemihydrate (CaSO ₄ .1 / 2H ₂ O), may be used which is treated with dihydrate gypsum at a constant temperature. Gypsum is calcium sulfate dihydrate (CaSO ₄ · 2H ₂ O), which has been flame retardant, has excellent sound insulation, heat insulation, and the like, and has been used as a material for building plates. The gypsum gypsum may be a phosphate gypsum (phosphate gypsum) or a desulfurized gypsum of a thermal power plant. When calcined gypsum is heated at a temperature of about 120 to 130 ° C. for several hours, calcium sulfate hemihydrate (CaSO ₄ .1 / 2H ₂ O), that is, calcined gypsum, may be prepared. The prepared hemihydrate gypsum can be used by grinding to an appropriate particle size. Grinding means, such as hammer crusher using fine grinding, CVM (Continous Vibration Mill) or ball mill (Ball Mill) by using a grinding device such as fine grinding to about 110 ~ 130 mesh can be used. Anhydrite is a chemical component of CaSO ₄ , can be prepared by applying heat to the hydrated gypsum. Dihydrate gypsum can be prepared by heating at a temperature of about 400 ° C.

The gypsum included in the gypsum composition of the present invention may be included in an amount of preferably 30 to 90 parts by weight based on 100 parts by weight of the total composition. If the content of the gypsum is 30 parts by weight or less, the durability of the interior and exterior materials is not good, and on the contrary, if the content of the gypsum is more than 90 parts by weight, the content of the foamed glass is relatively reduced, so it is difficult to achieve the weight reduction and insulation and sound absorption of the interior and exterior materials.

As described above, the interior and exterior materials according to the present invention made of a gypsum composition containing gypsum and foam glass is superior in thermal insulation and / or sound absorption than the foam glass is simply applied to the interior and exterior materials. If the foam glass is simply applied to the interior and exterior materials, since the bonding strength between the foamed glass and the interior and exterior materials is low, there is a difficulty in molding, and the gypsum and the foamed glass are not well bonded to each other. In addition, a porous material such as clay has a uniform pore size, whereas the foamed glass contained in the gypsum composition of the present invention has a uniform pore size, so that the thermal insulation and / or sound absorption effect is better (see FIGS. 1 and 3). ). In addition, since the specific gravity of the foam glass is lighter than porous materials such as clay, it is possible to manufacture low specific gravity interior and exterior materials (see Experimental Example 1).

On the other hand, the gypsum composition according to the present invention may further contain one or more selected from the group consisting of a foaming agent, a color additive, a binder strengthening agent and a curing agent.

The foaming agent, which can be added for foaming, can be used without limitation as long as it is commonly used as a foaming agent of gypsum board or concrete.

The color additive may be added to indicate the color to be expressed in the interior and exterior materials produced by the gypsum composition. When trying to exhibit black, black clay may be used, and the color may be expressed by a plant extract formulated using a plant as a raw material, or the color of the interior and exterior materials may be expressed using charcoal powder which is a natural dye.

As the binding agent, clay, cement or a mixture of clay and cement may be selectively added. As the clay which can be used, preferably, an inorganic material having a particle size of 0.004 mm or less may be used as a component of SiO ₂ , Al ₂ O ₃ , Fe ₂ O ₃ . The cement may be a cement for civil construction with lime, silica, alumina, iron sulfide as a main component.

Examples of the curing agent include aluminum sulfate [Al ₂ (SO ₄ ) ₃ ], potassium sulfate (K ₂ SO ₄ ), iron sulfate (FeSO ₄ ), quicklime, calcined lime, and the like.

At least one member selected from the group consisting of a foaming agent, a color additive, a binder, and a curing agent may be used in an amount of 2 to 10 parts by weight, based on 100 parts by weight of the gypsum composition according to the present invention.

As described above, the gypsum composition containing gypsum and foam glass, it is possible to manufacture the interior and exterior materials with improved heat insulation and / or sound absorption.

The interior and exterior materials are not limited as long as they can be produced by the gypsum composition, and may be gypsum board, sandwich panel, or the like.

The interior and exterior materials of the present invention can be manufactured according to a general interior and exterior materials manufacturing method, except that the gypsum composition containing the foamed glass according to the present invention is used.

In one embodiment, a slurry is formed by mixing with addition of water to a gypsum composition comprising foamed glass and gypsum, filling the slurry between gypsum board base layers, molding and drying the plate to form a plate having improved thermal insulation or sound absorption. The gypsum board according to the invention can be produced.

The mixing can be performed using a mortar mixer. The input amount of water may be mixed in various compounding ratios according to the type or physical properties of gypsum and foamed glass as main materials. Gypsum and foam glass can be composed of 1: 0.5 and water can be composed of 1: 1 compared to gypsum. The slurry is dried in a pre-dryer after adhering moisture (moisture present in the adhered state on the gypsum surface) of calcined gypsum, calcined in a kiln, the calcined half gypsum is crushed and stored in a silo, and then half water It can manufacture by mixing materials, such as gypsum and water. The drying step may be carried out at room temperature depending on the use of the product or the difference in the content of the material to be mixed, or may be carried out secondary drying using a dryer. Alternatively, both the primary drying step of drying at room temperature and the secondary drying step of high temperature by a dryer may be performed. Surplus moisture, which is generated when half water gypsum and water are mixed, can be dried by air drying for about 12 hours indoors.

In another embodiment, a slurry is prepared by mixing water with a gypsum composition including foamed glass and gypsum, putting the slurry in a mold and then drying it freely, and drying the dried product on one side or panel of the prepared metal panel. By adhering to the surface between panels using an adhesive agent, the sandwich panel by this invention can be manufactured.

The manufactured gypsum board can be cut to a certain standard.

As described above, the interior and exterior materials according to the present invention made of the gypsum composition according to the present invention containing foamed glass and gypsum have improved thermal insulation and / or sound absorption (see Experimental Example 1).

Hereinafter, the present invention will be described in more detail with reference to Examples and Experimental Examples. However, the following examples are illustrative of the present invention, and the contents of the present invention are not limited by the examples.

< Example  1>

Preparation Example 1 Preparation of Gypsum Board

 Isu gypsum (phosphate fertilizer by-product of Namhae Chemical) was calcined at 120 ~ 140 ℃. The calcined hemihydrate gypsum was ground to a particle size of 125mesh by a ball mill. 10 kg of the pulverized gypsum raw material, 10 kg of water, 5 kg of foam glass, 0.5 kg of clay, 0.1 kg of foaming agent (foam board, manufacturer: Polytech) were added and mixed for 30 seconds with a mortar mixer. Foamed glass was prepared by using a specific gravity of 0.3, porosity 80%, particle size 3mm. The foam glass was prepared as follows. First, the alkali glass (soda lime glass) and LCD non-alkali waste glass which are glass bottle waste glass were grind | pulverized with a grinder so that it might become 200 micrometers or less. 75 g of alkali glass, 20 g of LCD glass, and 3 g of limestone were sufficiently mixed until the formulation became uniform. The obtained particulate glass mixture was put into a pan pelletizer and sprinkled with binder (Sodium Silicate (5% per 100 glasses)) to prepare a particulate glass mixture in a spherical shape. After the molded product was dried by firing and foaming at a temperature of 800 ~ 850 ℃ in a rotary kiln and then quenched to produce a foam glass having a specific gravity of 0.30, porosity 80%.

The mixed composition was molded into a plate body having a horizontal X length of 28 X 28 cm and a thickness of 12.5 mm Gypsum board was manufactured by air drying indoors for 12 hours.

 Comparative Example 1

 A gypsum board was manufactured in the same manner as in Preparation Example 1, except that 5 kg of gypsum was used instead of using foamed glass.

< Experimental Example  1>

The thermal conductivity, density, and sound absorption coefficient of the gypsum boards prepared in Preparation Example 1 and Comparative Example 1 were measured, and the results are shown in Table 1 below. The thermal conductivity was measured by KSL 9016 thermal conductivity to thermal conductivity measurement method (plate heat flow meter measurement), the heat flow rate passing through the test body using a flat plate heat flow meter method (measurement device), by measuring the temperature difference of the test body, the thermal conductivity was measured. The density was measured by dividing the weight of the board by volume, and the sound absorption rate was calculated according to the method of KS F 2805, and the NRC (absorption coefficient) was calculated as the arithmetic mean of the absorption rates at 250Hz, 500Hz, 1,000Hz, and 2,000Hz. Obtained.

Thermal Conductivity (Kcal / m.hr. ℃) Density (g / cm3) NRC (sound absorption coefficient) Preparation Example 1 0.12 0.5 0.60 Comparative Example 1 0.22 0.6 0.07

As shown in Table 1, the gypsum board manufactured by Preparation Example 1 has a lower thermal conductivity than the gypsum board manufactured in Comparative Example 1, it can be confirmed that not only the heat insulation performance is improved, but also light weight. In addition, it can be confirmed that the sound absorption is improved.

Figure 1 (a) is a cross-sectional picture of the foamed glass according to an embodiment of the present invention, (b) is a cross-sectional picture of the existing porous material (clay).

2 is a picture of the interior and exterior materials prepared according to an embodiment of the present invention.

Figure 3 is a side photograph of the interior and exterior of Figure 2;

Claims (9)

An interior and exterior material made of a gypsum composition comprising 30 to 90 parts by weight of gypsum and 10 to 70 parts by weight of foam glass, based on 100 parts by weight of the total composition. The interior and exterior materials according to claim 1, wherein the gypsum is a mixture of hemihydrate gypsum, anhydrous gypsum, or both. The interior and exterior materials of claim 1, wherein the foam glass is manufactured by foaming an alkali glass, an alkali free glass, or both. The interior and exterior materials according to claim 1, further comprising one or more selected from the group consisting of a foaming agent, a color additive, a binder strengthening agent, and a curing agent, based on the total weight of the composition. The interior and exterior materials according to claim 4, wherein at least one member selected from the group consisting of a foaming agent, a color additive, a binder strengthening agent and a curing agent is contained in an amount of 2 to 10 parts by weight based on 100 parts by weight of the gypsum composition. The interior and exterior materials according to claim 1, wherein the interior and exterior materials are gypsum board or sandwich panel. The interior and exterior materials according to claim 1, wherein the interior and exterior materials are made by mixing water with the gypsum composition of claim 1 to make a slurry, and filling the slurry into a base paper or molding the slurry after drying the slurry.  The interior and exterior materials according to any one of claims 1 to 7, wherein the interior and exterior materials have a lower thermal conductivity than the interior and exterior materials made of a gypsum composition containing no foamed glass. The interior and exterior materials according to any one of claims 1 to 7, wherein the interior and exterior materials have improved sound absorption than interior and exterior materials made of a gypsum composition containing no foamed glass.

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