KR100495041B1 - A building material having dust prevention, sound-proofing and adiabatic function, a floor structure provided the same - Google Patents

Abstract

The present invention is extruded and molded high-density plastic resin, but a plastic double board with an air layer in the middle as a center substrate, the upper and lower surfaces of the polyester fiber sheet (POLYESTER FIBER SHEET) excellent in sound absorption, heat insulation effect with adhesive The present invention relates to a building material for a floor structure and a floor structure using the same. In addition to the sound absorption and insulation effect of the polyester fiber sheet, the air layer at the center of the plastic double board layer lowers the thermal conductivity to maximize the thermal insulation effect against the outside temperature. In addition, it exhibits a dustproof effect to absorb external shocks and vibrations, and the high-density plastic double board layer exhibits a low frequency sound insulation effect, and the polyester fiber sheet attached to both sides of the plastic double board layer also has an air layer between the fibers. Because it contains excellent sound absorption and insulation effect of high frequency sound In addition, the present invention can simultaneously exhibit a dustproof effect by shock absorption, a soundproofing effect by sound absorption and sound insulation, and a heat insulating effect.

The present invention is a plastic double board molded by extruding a copolymer of polypropylene and polyethylene (PP, PE COPOLMER) of the raw material has excellent durability and chemical resistance, excellent heat insulation and soundproofing effect, polyester fiber sheet (POLYESTER FIBER SHEET) Has excellent sound absorption, heat insulation, weather resistance, heat resistance (cold resistance) and durability, and is a combination of high-density plastic double board and polyester fiber sheet as a raw material.

The present invention is a product that maximizes the soundproofing effect by sound absorption and soundproofing and the shock-absorption effect and the shock-absorption effect and insulation effect as a thin layer of dustproof, soundproofing, heat insulating material, and is easy to apply in the construction site and energy by heat insulation. It is economical because of the saving effect.

Description

A building material having dust prevention, sound-proofing and adiabatic function, a floor structure provided the same}

The present invention relates to a building material for interior construction of a floor structure that is installed in a wall or a floor structure of a multi-family house such as an alliance, a multi-family house, etc., and performs a dustproof, soundproofing, and thermal insulation function, and a floor structure using the same. In particular, by installing a polyester fiber sheet attached to the upper and lower surfaces of the plastic double board having an air layer when constructing a wall or a floor structure material, the building material for floor structure interior and the floor structure using the same that have improved vibration, soundproofing and insulation It is about.

Generally, in buildings such as multi-family houses or schools where the walls and floors must be shared with neighbors, they are caused by impacts on the floor due to walking indoors, children jumping, falling objects, or moving furniture. Dustproof, soundproofing and insulating materials are used, respectively, to exhibit the effect of absorbing the floor impact sound or the noise of the room to the neighboring generation through the walls and absorbing sound.

An example of such building materials will be briefly described with reference to FIGS. 1A to 1D as follows.

In the case of glass insulation used as a thermal insulation material in order to exhibit the sound-absorbing, heat-insulating effect of the building in the prior art, it is manufactured and used in a thickness of 25mm-75mm (shown in Figure 1a), in the case of a urethane foam board of a thickness of 25mm-125mm It is manufactured and used (shown in Figure 1b), foamed polystyrene foam (Schirofoam) is used in a thickness of 10mm-100mm (shown in Figure 1c) depending on specific gravity, and in the case of rock wool (ROCK WOOL RIGID BOAD), 25mm- It is manufactured and used in thickness of 80 mm, and mainly used is a polyethylene foam board (PE FOAM) or a slightly higher priced carbon cork board.

The above products are somewhat different depending on the density, but generally only 30mm-50mm thick products can give the desired insulation effect. In particular, as the sound absorbing material, foamed polystyrene foam (Schirofoam) and foamed polyethylene foam (P, E FOAM) are used in addition to natural wood fibers and polyester fibers. Sound is not absorbed and passes through as it is, there is a disadvantage that can not expect a complete sound insulation effect.

In addition, in the case of multi-family houses or high-rise buildings, the floor is impacted by people walking, falling objects, and moving furniture. Although a lightweight foamed concrete layer or a foamed polystyrene foam layer is provided as a buffer layer on the floor concrete slab, it does not show a great effect on the sound insulation of the interlayer floor impact sound.

This is because apartment buildings are mostly constructed in the same way as above, but the reality is that vibrations caused by falling objects or jumping impacts of children are transmitted to the lower floors as they are, resulting in noise.

Recently, in order to increase the effect of blocking the floor impact sound between the floors, as shown in FIG. 1D, the vibration due to the impact applied from the upper layer is somewhat suppressed by using a special dustproof material such as anti-vibration rubber pads (PAD) having a thickness of 10 mm to 50 mm. The situation is showing the effect of blocking.

Looking at the cross-sectional view of the floor structure using the existing floor structure and the anti-vibration rubber pad (PAD) as shown in Figures 2a and 2b. 2A is a cross-sectional view of a general floor structure, and FIG. 2B shows a floor structure in which an anti-vibration rubber pad is embedded.

In FIG. 2B, unlike the conventional floor structure of FIG. 2A, a vibration damping rubber pad having a thickness of about 10 mm to 50 mm is installed below the light-weight foam concrete layer to absorb the shock applied from the upper layer by the elasticity of the rubber pad and to be transmitted to the lower layer. To some extent.

However, because the concrete slab layer, anti-vibration rubber pad layer, lightweight foam concrete layer, and floor plaster mortar layer are bonded together, the anti-vibration effect on the impact can be halved. The flooring (FLOATING FLOOR) structure or the hypothesis of the auxiliary ceiling can be said to be the most effective, in this case there is a problem that the floor height is low, the construction cost is high.

Therefore, the present invention has been proposed to solve the above problems, and is formed by extruding a copolymer of polypropylene and polyethylene (PP, PE COPOLYMER) raw material, the middle of which is a plastic double board having an air layer as a center substrate As a vibration absorber for interlayer impact sound, it is made of floating floor structure by incorporating a BOARD of thin thickness attached with polyester fiber sheet with excellent sound absorption and insulation effect on both sides. It is an object of the present invention to provide a building material for interior construction of a floor structure and a floor structure using the same, which maximizes a dustproof effect, soundproofing and sound insulation by sound insulation and sound insulation.

In addition, the present invention has a far lower manufacturing cost than the existing dust-proof, soundproofing, heat insulating material, and has another object to provide a building material for the interior of the floor structure and energy saving by the heat insulation effect and a floor structure using the same.

In addition, the present invention has another object to provide a building material for the interior of the floor structure that can be used as an interior finishing material, such as machine room, air conditioning room, performance hall, gymnasium.

In order to achieve the above object, the present invention is manufactured by extrusion molding a copolymer raw material of polypropylene and polyethylene, the upper and lower plates are installed with a predetermined vertical height interval to block the impact sound flowing from the upper layer; A polyester fiber sheet attached to at least one surface of the upper and lower plates and absorbing and extinguishing the impact sound flowing from the upper layer first; An air layer forming member disposed between the upper plate and the lower plate so as to have a predetermined height interval, and partitioned at predetermined intervals so that an air layer for absorbing and extinguishing the residual impact sound or vibration sound which may be introduced through the upper plate is eliminated; And upper and lower plates installed at predetermined height intervals so as to extend by a predetermined length, and provided at the ends of the upper and lower plates, and a joint grip having an air communication hole formed at a predetermined position. In addition, the present invention is a concrete slab layer; An interlayer noise prevention layer provided on an upper portion of the concrete slab layer and formed by attaching a polyester fiber sheet on the upper and lower surfaces thereof, using the upper and lower double boards having an air layer formed at the center thereof; A joint grip for inserting an end portion of the interlayer noise preventing layer to extend as long as a predetermined size; Lightweight foam concrete layer installed on the interlayer noise prevention layer; A heating mortar layer installed on the light-weight foam concrete and having a heating pipe arranged therein; And it provides a floor structure comprising a floor finishing layer installed on top of the heating mortar layer.

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The building material for the interior of the floor structure according to the present invention is a soundproofing and insulating layer inside the masonry space stacking, the soundproofing and insulating layer of the outer wall, the machine room, the air conditioning room, the interior finishing material of any one of the performance hall, gymnasium, or the interior filling layer of the lightweight partition, soundproof wall It is applied to either the interior filling layer or the building roof insulation layer.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings of FIGS. 3 to 14.

The building material for the interior of the floor structure and the floor structure using the same according to the present invention are implemented to maximize the insulation effect while preventing the noise between floors of public buildings, manufacturing cost is low, and the construction can be made simply.

In the present invention, in order to minimize the floor impact sound transmitted by the vibration from the upper floor to the lower floor, the method of forming a flooring structure is essentially effective between the concrete slab layer and the lightweight foam concrete layer. It is based on the theory of greatness. Therefore, in the present embodiment, as shown in Figures 3 and 4 to extrude the high-density plastic resin to form a floating floor structure, to absorb and extinguish the shock or vibration introduced from the outside to the center Plastic double board (1) with an air layer for; The upper and lower outer surfaces of the double board (1) propose a structure in which polyester fiber sheets (2, 3) having excellent sound absorption and heat insulation effects are attached.

Here, the double board (1) acting as a center substrate, as shown in Figure 3a, the upper and lower plates (11, 12); The upper and lower plates 11 and 12 are connected to each other, and the partition plates 13 are arranged in a straight line at a predetermined interval to form an air layer 14 therebetween. In the above configuration, the upper and lower plates 11 and 12 and the partition plate 13 of the double board are not only combined loads of lightweight foam concrete layers, floor plastering mortar layers, and floor finishing layers, but also various furniture on the upper floor finishing layers. It should be made of structure that can endure without crimping even if it is placed on the product, and it should have sound insulation to achieve floating floor structure like floor finishing material floating separately from concrete slab layer. have. In order to satisfy these conditions, the upper and lower boards 11 and 12 and the partition plate 13 of the present invention are manufactured by extrusion molding a raw material of high density polypropylene and polyethylene (PP, PE copolymer). Consists of boards. Such a double board exhibits the sound insulation effect of low frequency sound that is not absorbed well in a general sound absorbing material, and is light but has high strength, water resistance, heat resistance (cold resistance), durability, and chemical resistance. As shown in the test report shown in Fig. 14, it can withstand a load of 7.3 kgf per 1 cm 2, and thus, when the double board is 1 m 2, it is concluded that it has a compressive strength that can withstand a load of 73 tons. Therefore, the above conditions can be sufficiently satisfied. In other words, the double board is not compressed, and has a compressive strength that can maintain the original shape as it is, it is possible to achieve a floating floor structure.

In addition, in the structure of the plastic double board 1 as described above, the passage formed by the partition plate 13 arranged at a predetermined interval to receive and extinguish the vibration sound due to the impact introduced through the upper plate 1 of the double board. The air layer 14 can be formed, and the air layer 14 resonates and extinguishes sound with the dustproof effect of the shock vibration, and at the same time exhibits a heat insulating effect. The vertical height of the plastic double board (1) layer has a thickness of 2mm ~ 6mm to secure the air layer, the weight is manufactured by 500g / ㎡ ~ 2,000g / ㎡ for compressive strength. In addition, the double board 1 in this embodiment can be produced by mixing a flame retardant material (not shown) with a copolymer of polypropylene and polyethylene for flame retardant treatment.

In addition, as shown in FIGS. 5A and 5B, the double board 1 further includes a joint grip 15 to extend the length by a predetermined length so that the double board 1 can be installed in accordance with the area of the concrete slab. The joint grip 15 is composed of a combination of upper and lower plates and a vertical member has a structure that can fit the end of the double board (1). Here, Figure 5a shows a grip having a substantially I-shaped cross-section in order to extend the double board (1) horizontally, Figure 5b shows a grip that can connect the double board horizontally and vertically, "c The second grip 15 ′ extending vertically at a predetermined interval on the upper portion of the first shape grip 15 is coupled to each other.

A hole 16 for communicating between the air layers 14 formed in the partition plate 13 may be formed in the vertical member of the joint grip 15. By such a structure, the vibration or impact sound introduced into the air layer 14 passes through the neighboring air layer and diffuses into the air layer of the entire double board 1, thereby increasing the extinction rate of the vibration or impact sound.

As another embodiment of the double board 1, as shown in FIG. 3B, the partition 13 'connecting the upper and lower plates 111 and 12 may have a honeycomb structure. In this case, there is an effect that can further increase the strength of the double board (1).

On the other hand, the polyester fiber sheet (POLYESTER FIBER SGEET) (2, 3) layer attached to both sides of the plastic double board (1) layer is excellent sound absorption, heat insulation, and includes an air layer between the fibers, elasticity Because of this, the role of vibration absorption by shock and the sound absorption and insulation effect is enhanced. That is, the polyester fiber sheet (2, 3) has a function of primarily absorbing sound so that the noise generated in the upper layer is not transmitted to the lower layer.

The polyester fiber sheets (2, 3) in the present embodiment is to use a heat-sealed sheet (SHEET) after the polyester is laminated to make a web (WEB) state through a carding process (CARDING), In order to increase the thermal insulation, it is manufactured with a thickness of 2mm-8mm and a weight of 200g / ㎡-800g / ㎡.

The sound insulation (sound absorption, sound insulation), insulation, and dustproof effects of the present invention will be described in more detail by dividing each layer as follows.

First, the polyester fiber sheet (2) bonded to the upper surface of the double board (1) includes an air layer between the fibers to exhibit a sound absorbing effect of the high frequency sound and at the same time a heat insulating effect, manufactured by molding a high-density plastic resin The plastic double board layer (1) exhibits a sound insulation effect of low frequency sound such that a double wall or a double window has a good sound insulation effect, and is excellent in sound insulation effect by sound absorption and sound insulation.

In addition, the air layer 14 formed between the plastic double board layer can absorb the vibration sound generated by the impact vibration in the upper layer directly down to the lower layer can exhibit the effect of the insulation layer with the dustproof effect by the buffer role. The polyester fiber sheet 3 attached to the lower surface has a sound absorption effect and a thermal insulation effect of high frequency sound, like the polyester fiber sheet 2 attached to the upper surface.

The building material for the interior structure of the floor structure configured as described above has a higher insulation effect compared to the thermal insulation material (thickness 30mm-50mm) used in the prior art even with a thin thickness of about 10mm, and the sound absorbing material used in the prior art Compared with the vibration-proof rubber pads, the air layer is placed in the center portion to maximize the vibration and soundproof effects.

In addition, the size of the building material is usually manufactured in a width of 60cm ~ 120cm in length can be adjusted as needed.

It will be described with respect to the floor structure using the building material for interior built floor structure as described above.

Figure 6 is a schematic cross-sectional view of the floor structure using the building material for interior of the floor structure of the present invention, the concrete slab layer 21; It is installed on the upper part of the concrete slab layer 21, and consists of a polyester fiber sheet attached to its upper and lower surfaces with a double board having an air layer formed at the center thereof as a center material, and performs soundproofing, soundproofing and insulation. Prevention material 22; Lightweight foamed concrete layer (23) installed on top of the interlayer noise prevention material (22); A mortar layer 24 installed above the lightweight foamed concrete layer 23 and having a heating pipe 25 mounted therein; It consists of a floor finishing material 26 provided on the mortar layer 24.

Then, the construction for exhausting the floor impact sound between floors by blocking the vibration for the floor impact of the apartment house is as follows.

The concrete slab layer 21 is installed, but the flatness of the base surface of the concrete slab 21 is to be maintained, so if the uneven part is removed by the digging process, if the entire base surface is not horizontal, the sand is thinned and the base surface is horizontally installed. To create. Then, the interlayer noise prevention material 22 formed by attaching a polyester fiber sheet to the upper and lower surfaces of the double board having an air layer formed at the center thereof as a center substrate is cut and laid in accordance with the base surface of the concrete slab layer 21. At this time, the interlayer noise prevention material 22 is laid to connect from one side to the other side, the joint portion is laid while connecting by using a joint joint grip (GRIP), and the wall surface is finished with lightweight foam concrete layer 23 The interlayer noise preventing material 22 is attached to the mortar layer height.

Next, after the polyethylene film is laid on the upper part of the interlayer noise preventing material 22, the lightweight foamed concrete 23 is poured, and the heating pipe 25 is placed on the upper portion of the lightweight foamed concrete layer 23. After installing), the finishing mortar 24 is poured and the floor finishing material 26 is laid to complete the construction.

Due to such a floor structure, the polyester fiber sheet is first absorbed by the sound absorbing polyester fiber sheet before the shock vibration caused by human walking, dropping of objects, movement of furniture, etc. to the lower floor, and the double board top plate 11 is soundproofed. The residual sound passing through the upper plate 11 of the double board resonates through the air layer and disappears. In addition, the dual board lower plate 12 and the polyester fiber sheet 3 attached to the lower outer surface of the double board 12 blocks and absorbs the sound passing through the air layer to prevent the light and heavy floor impact sound from being transmitted to the lower layer reliably. In addition, the present invention exhibits the anti-vibration effect and sound insulation effect that can block the noise between the floors as described above, and at the same time exhibits the heat insulation effect to block the heat of the heating pipe installation to take down.

The present invention is used as a block and sound absorbing, sound insulation, insulation between floors of floors of apartment buildings, high-rise buildings, the use of heat insulation and sound insulation material inside the masonry space wall stacking wall, and the use of lightweight partitions as an internal filler to insulate and sound insulation effect It can be used for heat insulation and sound insulation for exterior walls and for roof insulation. In addition, the use of dustproofing, soundproofing, and insulation materials in facilities such as private houses, office buildings, performance halls, and gymnasiums can reduce energy and construction costs due to the insulation effect. It can be applied to the interior finish, and the examples are as follows.

Example

In case of sound insulation and insulation layer construction inside masonry space stacking

As shown in FIG. 7, the connecting portion of the interlayer noise preventing material is connected by using a grip for joining joints (GRIP), and the interlayer noise preventing material 32 having a thin thickness in the inner space of the masonry brick stacking 31. It maximizes the sound insulation and insulation effect by absorbing high frequency sound and low frequency sound.

In case of external wall soundproof insulation layer construction

As shown in FIGS. 8 and 9, the fixing pin 42 is attached to the outer wall 41, and the interlayer noise preventing material 43 is attached, and the end of the fixing pin is covered with the cap 44, and the plaster The board 45 is attached to exhibit a dustproof and soundproof insulation effect.

By using a thinner dust-proof, sound-proofing, and heat insulating layer than the heat insulating material generally used, the use area of the indoor space is expanded.

In case of dustproof, soundproof, insulation layer construction in machine room and air conditioning room

As shown in FIG. 8 and FIG. 9, the sound absorbing effect of the high frequency sound absorbing and the low frequency sound insulation is improved by enhancing the dustproof effect of blocking sound generated by the vibration of the machine than when using the conventional general sound absorbing and heat insulating material. , Improves the insulation effect.

In the case of performance hall, gym dustproofing, soundproofing, insulation layer construction

As shown in Figure 10, by adding a dust-absorbing effect by the impact than when applying the conventional sound-absorbing, heat insulating material of the prior art to increase the dust-proof, soundproofing, heat insulation effect.

Here, 51 denotes a wall, 52 denotes a gypsum board, 53 denotes an interlayer noise preventing material, 54 denotes a feature wood, and 55 denotes a finish.

In case of lightweight partition internal filling construction

As shown in FIG. 11, the thin layered noise preventing material 63 of about 10 mm is filled in the light weight partition 61 and is joined by a joiner 62. The light weight partition is improved because it enhances dustproofing, soundproofing, and heat insulation. There is an effect that can be thinned.

In case of filling inside soundproof wall

As shown in Figure 12, having a separate air layer 74 on one side of the front plate 71 made of a rubber pad and installs the interlayer noise prevention material 73 and finishes with a back plate 75, As in the case of light-weight partition internal filling construction, the thickness of the soundproof wall can be reduced, which not only reduces the construction cost, but also reduces the sound absorbency because the existing product uses a film to prevent scattering. The polyester fiber sheet contains the air layer, so that the high frequency sound absorption and dispersion effect, and the plastic double board layer shows the sound insulation effect of low frequency sound is difficult to absorb sound, excellent dust and sound insulation effect.

In case of building roof insulation layer construction

As shown in FIG. 13, in the case of the central region, in general, the waterproofing layer 82 is constructed on the rooftop concrete slab layer 81, and the insulating material having a thickness of about 80 mm is generally laid on the roof concrete slab layer 81 and pressed thereon. The concrete 84 is to be poured, but in the present invention, by laying an interlayer noise prevention material 83 of about 10 mm, it is possible to further increase the heat insulation effect, so the construction cost is also great.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

As described above, in the present invention, the interlayer noise generated in the upper layer is primarily absorbed and extinguished by the polyester fiber sheet, and the noise passing through the polyester fiber sheet is transferred to the lower layer by blocking the upper board of the double board. In addition, the residual noise passing through the upper plate of the double board is resonated and extinguished in the air layer forming member, thereby enhancing the effect of blocking the floor impact vibration between floors in a multi-family house or a high-rise building. In addition, the thermal insulation can be maximized, the construction is simple, and the manufacturing cost is low. In addition, when used as a heat insulating material on the roof of the building and an internal heat insulating material for the masonry space stacking of the wall, the insulation and sound insulation effect can be increased even at a thin thickness, so that the utilization range of the indoor space can be widened and the construction cost can be greatly reduced. Light weight and thin thickness can be used for sound insulation and insulation effect even when used as an internal filler in a dry wall and a soundproof wall, and high strength and thin when used as an internal finishing material in a machine room, an air conditioning room, or a gymnasium in a concert hall By showing the effect of sound insulation and insulation in thickness, it is possible to reduce energy and construction cost, and there are other effects that can maximize the sound insulation and insulation effect by the vibration blocking, sound absorption, and sound insulation caused by the impact of the building.

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Figure 1a to 1d is an exemplary view showing the specifications of the general sound absorbing material, sound insulation and heat insulating material.

Figure 2a and Figure 2b is a cross-sectional view of the floor structure employing a general floor structure and anti-vibration rubber pad.

Figure 3a is an exploded perspective view of the building material for interior of the floor structure according to the present invention.

Figure 3b is another embodiment configuration of the building material for interior of the floor structure according to the present invention.

Figure 4 is a cross-sectional view showing a coupling configuration of the building material for interior construction of the floor structure according to the present invention.

Figures 5a and 5b is a cross-sectional view showing the configuration of the joint grip for connecting the double board of the present invention.

Figure 6 is a schematic diagram showing a state in which the building material for interior construction of the floor structure according to the present invention mounted on the flooring materials, such as multi-family housing, high-rise buildings.

Figure 7 is a state diagram installed in the masonry space stacking in the interior wall installation of the building structure built-in floor structure according to the present invention.

8 is an exploded perspective view showing a state of constructing the building material of the present invention on the outer wall of the building.

9 is a cross sectional view of FIG. 8;

Figure 10 is a cross-sectional view of the construction of a performance hall, gym soundproofing and thermal insulation layer using the building material for interior of the floor structure according to the present invention.

Figure 11 is a perspective view of a lightweight partition filled with the interior of the partition to increase the sound insulation and insulation effect of the lightweight partition (DRY WALL) using the building material for interior of the floor structure according to the present invention.

Figure 12 is a perspective view of the interior of the building material for the interior of the floor structure installed inside the soundproof wall. Figure 13 is a detailed view of the insulation layer construction on the roof of the building using the building material for the interior of the floor structure according to the present invention. Compressive strength test report for board.

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* Explanation of symbols for main parts of the drawings

1: duplex board 2: top sheet

3: bottom sheet 11: top plate

12: Bottom 13: Partition

14: air layer 15: joint grip

Claims (15)

It is manufactured by extrusion molding a copolymer of polypropylene and polyethylene, the upper and lower plates are installed with a predetermined vertical height interval to block the impact sound flowing from the upper layer; A polyester fiber sheet attached to at least one surface of the upper and lower plates and absorbing and extinguishing the impact sound flowing from the upper layer first; An air layer forming member disposed between the upper plate and the lower plate so as to have a predetermined height interval, and partitioned at predetermined intervals so that an air layer for absorbing and extinguishing the residual impact sound or vibration sound which may be introduced through the upper plate is eliminated; And Grip for the joint, which is installed at the end of the upper and lower plates so that the upper and lower plates provided at predetermined height intervals can be extended by a predetermined length, and air communication holes are formed at predetermined positions Building material for interior construction including a floor. The method of claim 1, The building material for a floor structure interior, characterized in that the air layer forming member made of partition plates arranged in a straight line at a predetermined interval. The method of claim 1, Building material for a floor structure interior, characterized in that the air layer forming member is made of a honeycomb partition plate. (delete) The method according to any one of claims 1 to 3, The upper and lower panels have a height of 2mm-6mm and the building material for the interior of the floor structure having 500g / ㎡-2000g / ㎡. The method of claim 1, The upper and lower plates are built-in flooring material, characterized in that the flame retardant material is mixed with a copolymer of polypropylene and polyethylene for flame retardant treatment. (delete) The method of claim 1. The polyester fiber sheet is a building material for the interior of the floor structure, characterized in that the polyester is made through a carding (CARDING) process to make a web (WEB) state and then laminated and heat-sealed. The method of claim 1 or 8. The polyester fiber sheet has a thickness of 2mm-8mm and 200g / ㎡-800g / ㎡ building material for the interior of the floor structure. (delete) The method of claim 1, And the joint grip has an I-shaped cross section. (delete) (delete) (delete) Concrete slab layer; An interlayer noise prevention layer provided on an upper portion of the concrete slab layer and formed by attaching a polyester fiber sheet on the upper and lower surfaces thereof, using the upper and lower double boards having an air layer formed at the center thereof; A joint grip for inserting an end portion of the interlayer noise preventing layer to extend as long as a predetermined size; Lightweight foam concrete layer installed on the interlayer noise prevention layer; A heating mortar layer installed on the light-weight foam concrete and having a heating pipe arranged therein; And Floor finishing layer installed on top of the heating mortar layer Floor structure comprising a.