KR101260244B1 - Material for reducing noise between floors and execution method thereof - Google Patents

Abstract

The present invention relates to an interlayer noise reduction material and a construction method thereof, comprising: a vibration absorbing butt arranged at a predetermined interval on an upper portion of a slab layer, a plurality of buffer caps installed between the vibration absorbing butt, and the vibration absorbing butt and the buffer cap. A first sheet and a second sheet are respectively installed on the upper and lower surfaces of the vibration absorbing support is formed in the shape of a square plate and the first plate member is formed in the shape of a square plate and a plurality of support blocks on the upper surface, the support block is formed It provides a configuration including an elastic member disposed on the upper portion and a second plate member is formed with a pressing block to press the central portion of the elastic member downward.
By using the interlayer noise reduction material and its construction method as described above, the present invention effectively reduces the interlayer noise by minimizing the transmission of vibration or shock by using the buffer cap and the vibration absorbing support.

Description

Interlayer noise reduction material and its construction method {MATERIAL FOR REDUCING NOISE BETWEEN FLOORS AND EXECUTION METHOD THEREOF}

The present invention relates to an interlayer noise reduction material and a construction method thereof, and more particularly, to an interlayer noise reduction material and a construction method for reducing interlayer noise transmitted to a lower floor by vibration or impact in a multi-family house.

In the current building law, in case of building multi-family houses such as multi-family houses, multi-family houses and apartments, the floor is 180mm thick when constructing floor concrete, and the responsible material due to the occurrence of floor noise after construction at actual construction sites. In order to prevent this problem, all standard floor structures with a thickness of 210 mm are accepted.

In addition, the Building Code stipulates that interlayer noise reduction materials of 20 mm or more must be used for both the approved floor structure and the standard floor structure.

Conventional interlayer noise reduction materials can be produced using a variety of materials, but is usually prepared by adding water to the wet (濕式), it is applied by curing on a concrete slab for about 3-5 days to be constructed.

However, the interlayer noise reduction material produced as wet as described above contains water, which increases the weight of the product, which makes it difficult to transport and tears the bag that seals the interlayer noise reduction material during transportation.

In addition, there is a problem that care must be taken at all times because the interlayer noise reduction material is hardened when stored for a long time or the sealing state is poor.

An example of a technology related to an interlayer noise reducing material for solving such a problem is disclosed in Korean Patent Publication No. 10-2005-0002779 (published on January 10, 2005, hereinafter referred to as 'Patent Document 1').

1 is a cross-sectional view of a floor covering constructed using the interlayer noise reducing material according to Patent Document 1. FIG.

The interlayer noise reducing material according to Patent Document 1 is a step of grinding the expanded polyethylene and foamed urethane to 1 to 2 cm in width to make a scrap, and adding the ocher, germanium particles, germanium powder, sawdust and zeolite to the ground expanded polyethylene and foamed urethane. It is prepared through the step of mixing into a mixer (mixer) and mixing and packaging the finished mixture.

The interlayer noise reduction material 2 according to Patent Document 1 manufactured as described above is mixed with water at a predetermined ratio on the reinforced concrete slab 1 and coated with a predetermined thickness, as shown in FIG. Thus cures for 3 to 5 days.

When the interlayer noise reduction material 2 is cured, the heating pipe 3 is installed, the mortar 4 is applied, and when completely cured, the floor finishing material 5 is laid to finish the floor construction.

As in Patent Literature 1, the floor construction of a conventional multi-unit house uses an interlayer noise reduction material manufactured by adhering or combining different materials after foaming various resins to have elasticity, but there is a limit in completely reducing the interlayer noise. .

Therefore, there is a need for a method to solve the noise between floors, which has become a serious social problem due to the increase of apartments, at a low cost.

Republic of Korea Patent Publication No. 10-2005-0002779 (published January 10, 2005)

The present invention is to solve the problems described above, an object of the present invention is to provide an interlayer noise reduction material and a construction method for reducing the noise between the floor by converting the impact energy applied to the floor in the apartment house to the horizontal kinetic energy. It is.

Another object of the present invention is to provide an interlayer noise reduction material and a construction method thereof that reduce the interlayer noise by converting the impact energy applied to the floor into thermal energy.

It is still another object of the present invention to provide an interlayer noise reduction material and a construction method thereof which reduce the noise noise by widening the specific surface area of the flooring material.

According to a feature of the present invention for achieving the object as described above, the present invention is a vibration absorption support is arranged at a predetermined interval on the top of the slab layer, a plurality of buffer caps installed between the vibration absorption support and the vibration absorption And a first sheet and a second sheet respectively installed on the upper and lower surfaces of the pedestal and the buffer cap, wherein the vibration absorbing support is formed in the shape of a square plate and formed in the shape of a first plate and a square plate having a plurality of support blocks on the upper surface. And a second plate member having an elastic member disposed on an upper portion of the support block and a pressing block formed to press the central portion of the elastic member downward.

According to another feature of the present invention, the present invention includes a vibration absorbing support is formed in a plate shape and a plate shape arranged on the upper portion of the slab layer in a predetermined shape and the vibration absorbing support is coupled to the lower portion, the vibration absorbing support The first plate member is formed in the shape of a square plate and a plurality of support blocks are installed on the upper surface, the elastic block is formed in the shape of a square plate and the upper portion of the support block and the pressing block to press the central portion of the elastic member downward It characterized in that it comprises a second plate formed.

A plurality of first pillars and second pillars are formed to correspond to each other on the upper surface of the first plate and the lower surface of the second plate, respectively, and a coupling member having a locking step is formed on the upper surface of the first pillar, and the second An insertion groove into which the coupling member is inserted is formed at a lower surface of the column, and an upper surface of the first pillar and a lower surface of the second pillar are spaced apart by a predetermined interval so that the second plate moves downward. .

The elastic member is formed in a rectangular plate shape, the plurality of support blocks are formed in the height of the central portion is lower than the height of the outer portion so that the elastic member is convexly curved downward, the pressure block is the central portion of the elastic member It is characterized by being formed to protrude downward to press downward.

The elastic member may include first and second elastic members formed in a rectangular plate shape and installed to cross in an 'X' shape, and the plurality of support blocks may be disposed to correspond to the first elastic member. The height of the center portion is formed lower than the height of the outer portion so that the elastic member is convexly curved downward, the pressing block includes a plurality of blocks disposed to correspond to the second elastic member, the plurality of blocks It is characterized in that the height of the center portion is formed lower than the height of the outer portion so that the second elastic member is bent convex upward.

The buffer cap is formed by molding a synthetic resin material, characterized in that the inside of the buffer cap is filled with compressed air, or filled with a mixture of wood powder, fiber grinding, soil.

The buffer sheet is formed by injection molding or extrusion molding a synthetic resin material, or is formed by extrusion molding a waterproof paper material, a long side of the coupling rib is formed protruding formed on one side of the buffer sheet, the opposite side of the buffer sheet The coupling groove corresponding to the coupling rib is characterized in that the recess is formed.

The lower surface of the buffer sheet is formed with a fixed jaw is fixed to the vibration absorbing support is coupled, the side of the vibration absorbing support is characterized in that the hook groove is formed to take the fixing jaw is formed.

The buffer sheet is characterized in that the screw groove for screwing the fixing member for fixing the pipe installed on the interlayer noise reduction material is formed.

According to another feature of the invention, the present invention (a) installing a first sheet having an air cap formed on top of the slab layer, (b) a plurality of vibration absorption at a predetermined interval on the top of the first sheet Installing a pedestal, (c) installing a buffer cap between the vibration absorbing pedestal and (d) installing a second sheet formed with an air cap on top of the vibration absorbing pedestal and the buffer cap.

As described above, the present invention effectively reduces the noise between the floor by minimizing the transmission of vibration or shock by using the buffer cap and the vibration absorbing support.

That is, the present invention uses a cushioning effect generated by moving a plurality of buffer caps between the vibration absorbing support and the air or the filling filled in the buffer cap in the horizontal direction in accordance with the vibration or impact in the vertical direction applied to the floor Interlayer noise can be reduced.

In the present invention, when vibration or shock occurs, the first plate member of the vibration absorbing support is pressed downward while absorbing the vibration or shock by the elastic force of the elastic member as the elastic member is pushed downward.

In particular, the present invention is to fill the air inside the buffer cap or to fill the filling, such as wood powder, fibrous powder, soil with air, thereby effectively reducing the interlayer noise by increasing the transmission specific surface area for transmitting vibration or shock. Can be.

Accordingly, the present invention has the effect of converting the vibration or shock transmitted in the vertical direction to the horizontal direction using the buffer cap and the vibration absorbing support in the horizontal direction, converting the impact energy into thermal energy to reduce the noise between the floors.

In addition, the present invention can easily perform the pipe installation work by forming a screw groove in the buffer sheet to screw the fixing member, it is possible to easily adjust the height of the pipe by adjusting the coupling height of the fixing member.

1 is a cross-sectional view of the flooring constructed using the interlayer noise reduction material according to the prior art.
Figure 2 is a cross-sectional view of the entire floor, the interlayer noise reduction material according to a preferred embodiment of the present invention.
Figure 3 is a plan view showing a state in which the interlayer noise reduction material shown in FIG.
Figure 4 is an exploded perspective view of the vibration absorbing support shown in FIG.
5 is a cross-sectional view of the vibration absorbing support shown in FIG.
Figure 6 is an exploded perspective view of the vibration absorbing butt applied to the interlayer noise reduction material according to another embodiment of the present invention.
7 is a cross-sectional view of the vibration absorbing support shown in FIG.
Figure 8 is a cross-sectional view of the interlayer noise reduction material according to another embodiment of the present invention.
9 is a cross-sectional view of the buffer sheet shown in FIG.

Hereinafter, an interlayer noise reducing material according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a cross-sectional view of the entire floor on which the interlayer noise reduction material is constructed according to a preferred embodiment of the present invention, FIG. 3 is a plan view showing a state in which the interlayer noise reduction material shown in FIG. 2 is installed, and FIG. 4 is shown in FIG. An exploded perspective view of the vibration absorbing support, Figure 5 is a cross-sectional view of the vibration absorbing support shown in FIG.

First, the entire floor 10 in which the interlayer noise reduction material is constructed according to the present invention is installed on the slab layer 11 and the slab layer 11 formed integrally with the wall of the building, as shown in FIG. 2. The protective mortar layer 12 protecting the pipe 13 disposed on the interlayer noise reducing material 20, the interlayer noise reducing material 20, and the finishing layer 14 installed on the protective mortar layer 12. It includes.

As shown in FIGS. 2 and 3, the interlayer noise reducing material 20 according to the preferred embodiment of the present invention includes a plurality of vibration absorbing supports 21 arranged at a predetermined interval and each vibration absorbing support ( The first sheet 23 and the second sheet 24 are respectively installed on the upper and lower surfaces of the buffer cap 22 and the vibration absorbing support 21 and the buffer cap 22 arranged between the 21.

As shown in FIGS. 4 and 5, the vibration absorbing support 21 is formed in a rectangular plate shape and has a first plate material 31 and a rectangular plate shape in which a plurality of support blocks 32 are installed in a horizontal direction on an upper surface thereof. It is formed includes an elastic member 33 disposed on the support block 32 and the second plate member 34 is formed in the transverse direction so that the pressing block 35 is formed to press the central portion of the elastic member 33 downward. do.

A plurality of first pillars 311 are provided on the upper surface of the first plate member 31 so as to protrude upward along the periphery, and the first pillars are coupled to the first pillars 311 on the lower surface of the second plate member 34. A plurality of second pillars 341 are installed to protrude downward in a position corresponding to 311.

Here, the upper surface of the first pillar 311 is formed with a protruding coupling member 312 having a locking jaw 313 formed on the upper end, the insertion groove is coupled to the lower surface of the second pillar 341 is coupled to the coupling member 312 It is formed by feeding.

That is, when the vibration absorbing support 21 is constructed, a plurality of first pillars 311 and second pillars 341 are coupled by inserting the coupling member 312 into the insertion groove.

Here, the upper surface of the combined first pillar 311 and the lower surface of the second pillar 341 is to maintain a slight gap, for example, about 1 to 3mm.

When the impact or vibration is applied to the second plate 34, the second plate 34 is pushed downward by the above interval so that the pressing block 35 of the second plate 34 presses the center portion of the elastic member 33. do.

The support block 32 is formed of a plurality of blocks, as shown in Figure 5, each block is formed so that the height is lower toward the center of the first plate 31, and the height increases toward the outer.

Here, the upper end of the central block of the center portion of the elastic member 33 and the support block 32 is preferably installed to be spaced about 1.5mm apart.

That is, the first plate member 31 and the second plate member 34 calculate the weight of the second plate member 34 and the load applied to the elastic member 33 by the protective mortar layer 12 and the finishing layer 14. It is installed under the calculated load of about 3 ~ 10㎏.

The pressure block 35 presses the center portion of the elastic member 33 downward. When vibration or impact is applied to the bottom 10, the second block 34 is pressed downward while the pressure block 35 is elastic. The center portion of the member 33 is further pressed.

Accordingly, in the present invention, when a plurality of first and second pillars are spaced apart by a predetermined distance to support the first and second plates, the second plate moves downward when a load and an impact are applied from the top. Shock can be buffered by the elastic force of the elastic member.

The elastic member 33 is bent downward by the pressing block 35, the center portion of the elastic member 33 is in contact with the center block of the lowest height among the support block 32, the vibration or shock It absorbs and reduces the interlayer noise transmitted to the lower slab layer 11 and the lower floor of the building.

The elastic member 33 is preferably used waste such as waste tire having high elasticity. That is, the elastic member 33 uses a piece cut out of the waste tire to a predetermined size, for example about 40 * 30mm.

As described above, the present invention can recycle waste such as waste tires into the elastic member of the vibration absorbing support, thereby reducing the production cost of the vibration absorption support and reducing environmental pollution due to waste treatment.

The vibration absorption base 21 configured as described above is, for example, formed in a size of about 50 * 50 * 25mm, and about 36 pieces per 1 m 2 are preferably installed.

On the other hand, the shape, size and quantity of the elastic member 33 may be variously changed according to the specifications of the vibration absorbing support (21).

For example, FIG. 6 is an exploded perspective view of the vibration absorbing butt applied to the interlayer noise reducing material according to another embodiment of the present invention, and FIG. 7 is a cross-sectional view of the vibration absorbing butt shown in FIG. 6.

6 and 7, the vibration absorbing support 21 ′ applied to the interlayer noise reducing material according to another embodiment of the present invention is arranged to overlap the 'X' shape of the first and second elasticities. And members 36 and 37.

The support block 32 'of the first plate member 31 and the pressing block 35' of the second plate member 34 are also formed to correspond to the arrangement shape of the first and second elastic members 36 and 37.

For example, when the support block 32 ′ installed on the upper surface of the first plate 31 is viewed in FIG. 6 so as to support the lower surface of the first elastic member 36, the first to fourth portions of the first plate 31 are formed. The corners C1 to C4 are arranged along the diagonal direction from the first corner C1 to the third corner C3.

In addition, the pressure block 35 'installed on the lower surface of the second plate 34 has the fifth to eighth corners C5 to C8 of the second plate 34 so as to intersect the support block 33 in a' X 'shape. ) Is disposed along the diagonal direction from the second plate member C6 toward the eighth corner C8.

Here, the support block 32 'and the pressure block 35' are installed in the horizontal direction along the arrangement direction of the first and second elastic members 36 and 37, so as not to overlap each other as shown in FIG. It is preferable to be provided only at either side.

Thus, as shown in FIG. 7, the first elastic member 36 is convexly curved upward so that the height of the outer portion is higher than the center portion by the support block 32 ′ formed with the height of the center portion lower than the height of the outer portion. .

In addition, the second elastic member 37 is bent convexly downward so that the height of the outer portion is lower than the center portion by the pressure block 35 'formed with the height of the center portion lower than the height of the outer portion.

Accordingly, the present invention is installed so as to cross a pair of elastic members on the vibration absorbing support to absorb the vibration or shock applied to the floor to reduce the noise between the floor delivered to the lower floor of the building.

In Figure 3 again, the buffer cap 22 is installed between the vibration absorbing support 21 arranged at regular intervals serves to cushion the vibration or shock applied to the floor.

The buffer cap 22 is formed by molding a synthetic resin such as vinyl or plastic.

In particular, the inside of the buffer cap 22 is filled with compressed air, or filled with a mixture of wood powder, fiber grinding, soil.

The filler is preferably filled by only about 90% of the maximum fillable compressed air volume in the inner space of the buffer cap 22 to be filled with the air in the buffer cap 22.

Accordingly, the present invention by installing a plurality of buffer caps between the vibration absorbing support to reduce the noise between floors by using the buffer effect generated while moving the air or the filling filled in the buffer cap in accordance with the vibration or impact applied to the floor. Can be.

The first seat 23 and the second seat 24 is an air bubble sheet formed with a plurality of air caps, and protects the buffer cap by buffering vibration or shock applied to the floor by using air filled in each air cap. Do it.

On the other hand, in the present embodiment has been described that the buffer cap is installed between the plurality of vibration absorbing support, and the first and second seats installed in the upper and lower parts, the present invention is not necessarily limited thereto.

8 is a cross-sectional view of an interlayer noise reducing material according to still another embodiment of the present invention, and FIG. 9 is a cross-sectional view of the buffer sheet shown in FIG. 8.

That is, the present invention, as shown in Figure 8, instead of the buffer cap 22, the first and second seats (23, 24) cushioning sheet 25 is formed in a plate shape to be coupled to the vibration absorbing support 21 ) To be included.

The buffer sheet 25 is formed by injection molding or extrusion molding a synthetic resin material, or is formed by extrusion molding a waterproof paper material.

In particular, the buffer sheet 25 formed using a synthetic resin material is formed in a plate shape to be installed on the entire area of the bottom 10 by combining a plurality of, as shown in FIG.

In addition, one side of the cushioning sheet 25 has a coupling rib 251 extending protrudingly formed, and a shape corresponding to the coupling rib 251 on the opposite side of the surface on which the coupling rib 251 of the buffer sheet 25 is formed. The coupling groove 252 is formed to be recessed.

In addition, a fixing jaw 253 for installing and fixing the vibration absorbing support 21 on the lower surface of the cushioning sheet 25 protrudes downward, and a hook for securing the fixing jaw 253 on the outer surface of the vibration absorbing support 21. The groove 38 is recessed and formed.

In addition, as shown in Figure 8, the buffer sheet 25 is formed with a screw groove 254 arranged at regular intervals so as to screw the fixing member 15 for fixing the pipe 12 during the molding operation do.

The present invention can easily perform the pipe installation work by forming a screw groove in the buffer sheet to screw the fixing member, it is possible to easily adjust the height of the pipe by adjusting the coupling height of the fixing member.

Next, the construction method and the effect of the interlayer noise reduction material according to a preferred embodiment of the present invention will be described in detail.

First, as shown in Figure 2, after installing the second seat 24, the air cap is formed on the upper surface of the slab layer 11 formed integrally with the wall of the building, a plurality of vibration absorbing support 21 is spaced at a predetermined interval Arrange as

And the cushioning cap 22 is installed between each vibration absorbing support 21, and the first sheet 23, the air cap is formed on the upper portion of the vibration absorbing support 21 and the buffer cap (22).

In this case, the vibration absorbing support 21 is provided with one elastic member 33 between the first plate 31 and the second plate 34, or 'X' the first and second elastic members (36, 37) Install in a cross shape.

Then, each of the elastic members 33, 36, 37 is slightly bent by the support blocks 32, 32 ′ and the pressure blocks 35, 35 ′ formed in the first plate 31 and the second plate 34. .

When the construction of the interlayer noise reduction material 20 is completed, the pipe 13 is installed on the upper portion of the interlayer noise reduction material 20, and the protective mortar layer 13 and the finishing layer 14 are constructed.

At this time, as shown in Figure 8, in the case of using the buffer sheet 25 made of synthetic resin material by screwing the fixing member 15 to the screw groove 254 formed in the buffer sheet 25 to the pipe (13) It can be installed easily.

When the floor is applied to the floor noise reduction material according to the present invention constructed as described above, when the vibration or shock is applied, the first block of the vibration absorbing base is pressed downward while pressing the elastic block and the elastic force of the elastic member downward as the first block member is pressed downwards. As the air or filling in the cap moves, it absorbs vibration and shock.

In other words, the rate of vibration or shock transmission corresponding to the dynamic wave is closely related to the density of the medium, so that the air is filled inside the buffer cap or filled with air such as wood powder, fiber grind or soil. Therefore, the interlayer noise reduction material of the present invention can effectively reduce the interlayer noise by widening the transmission specific surface area for transmitting vibration or shock.

In addition, the present invention converts the vibration or shock transmitted in the vertical direction using the buffer cap and the vibration absorbing support in the horizontal direction, and converts the impact energy into thermal energy to reduce the noise between the floors.

Through the process as described above, the present invention effectively reduces the noise between the floor by minimizing the transmission of vibration or shock using the buffer cap and the vibration absorbing support.

Although the present invention has been described in detail with reference to the above embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

The present invention is installed on the floor of the apartment house is used to reduce the noise between floors due to vibration or impact.

10: floor 11: slab layer
12: protective mortar layer 13: piping
14: finishing layer 15: fixing member
20: floor noise reduction material 21: vibration absorption base
22: buffer cap 23: first sheet
24: second sheet 25: buffer sheet
251: coupling rib 252: coupling groove
253: fixing jaw 254: screw groove
31: First Plate 311: First Column
312: coupling member 313: locking jaw
32,32 ': support block 33: elastic member
34: 2nd board 341: 2nd pillar
35, 35 ': pressure block 36: first elastic member
37: second elastic member 38: hook jaw

Claims (10)

Vibration absorption feet arranged at predetermined intervals on top of the slab layer,
A plurality of buffer caps installed between the vibration absorbing support and
It includes a first sheet and a second sheet is installed on the upper and lower surfaces of the vibration absorbing support and the buffer cap, respectively,
The vibration absorption stand is
A first plate member formed in a rectangular plate shape and having a plurality of support blocks installed on an upper surface thereof;
An elastic member formed in a rectangular plate shape and disposed on the support block;
Interlayer noise reduction material comprising a second plate member is formed with a pressure block to press the central portion of the elastic member downward. Vibration absorption base arranged at a predetermined interval on the top of the slab layer and
It is formed in a plate shape and includes a shock absorbing sheet is coupled to the lower vibration absorbing support,
The vibration absorption stand is
A first plate member formed in a rectangular plate shape and having a plurality of support blocks installed on an upper surface thereof;
An elastic member formed in a rectangular plate shape and disposed on the support block;
Interlayer noise reduction material comprising a second plate member is formed with a pressure block to press the central portion of the elastic member downward. 3. The method according to claim 1 or 2,
A plurality of first pillars and second pillars are formed to correspond to each other on the upper surface of the first plate and the lower surface of the second plate, respectively.
On the upper surface of the first pillar is formed a coupling member having a locking step,
The lower surface of the second pillar is formed with an insertion groove into which the coupling member is inserted,
The upper surface of the first column and the lower surface of the second column is interlayer noise reduction material, characterized in that the second plate is spaced apart by a predetermined interval so as to move downward. The method of claim 3,
The elastic member is formed in a rectangular plate shape,
The plurality of support blocks are formed in the height of the center portion is lower than the height of the outer portion so that the elastic member is bent convex downward,
The pressing block is interlayer noise reduction material, characterized in that protruding downward to press down the central portion of the elastic member. The method of claim 3,
The elastic member includes a first and second elastic members are formed in a rectangular plate shape and are installed to cross the 'X' shape,
The plurality of support blocks are disposed to correspond to the first elastic member and the height of the center portion is formed lower than the height of the outer portion so that the first elastic member is convexly curved downward,
The pressing block includes a plurality of blocks disposed to correspond to the second elastic member,
The plurality of blocks are interlayer noise reduction material, characterized in that the height of the center portion is formed lower than the height of the outer portion so that the second elastic member is convexly curved upward. The method of claim 1,
The buffer cap is formed by molding a synthetic resin material,
Compressed air is filled in the buffer cap, or interlayer noise reduction material, characterized in that the filling is filled with a mixture of wood powder, fiber grinding, soil. The method of claim 2,
The buffer sheet is formed by injection molding or extrusion molding a synthetic resin material, or is formed by extrusion molding a waterproof paper material,
One side of the buffer sheet is formed to protrude a long coupling rib,
Interlayer noise reduction material, characterized in that the coupling groove corresponding to the coupling rib is formed on the opposite side of the buffer sheet. 8. The method of claim 7,
The lower surface of the buffer sheet is formed with a fixed jaw is fixed to the vibration absorption base is coupled,
Interlayer noise reduction material is characterized in that the hook groove is formed on the side of the vibration absorbing butt. 8. The method of claim 7,
The buffer sheet is characterized in that the interlayer noise reduction material is formed with a screw groove is screwed to the fixing member for fixing the pipe installed on the interlayer noise reduction material. (a) installing a first sheet having an air cap formed on top of the slab layer,
(b) installing a plurality of vibration absorption pedestals at predetermined intervals on an upper portion of the first sheet,
(c) installing a buffer cap between the vibration absorbing pedestals;
(d) a method of constructing an interlayer noise reducing material, comprising installing a second sheet having an air cap formed on top of the vibration absorbing support and the buffer cap.

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