KR20040021982A - a heat insulating and impacting sound reducing material for a multi-storey building - Google Patents

a heat insulating and impacting sound reducing material for a multi-storey building Download PDF

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KR20040021982A
KR20040021982A KR1020020053786A KR20020053786A KR20040021982A KR 20040021982 A KR20040021982 A KR 20040021982A KR 1020020053786 A KR1020020053786 A KR 1020020053786A KR 20020053786 A KR20020053786 A KR 20020053786A KR 20040021982 A KR20040021982 A KR 20040021982A
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South Korea
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layer
impact sound
reducing material
interlayer insulation
slab
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KR1020020053786A
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Korean (ko)
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KR100523806B1 (en
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임하진
박종선
박성호
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(주)티에이엔
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Priority to KR10-2002-0053786A priority Critical patent/KR100523806B1/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/18—Separately-laid insulating layers; Other additional insulating measures; Floating floors
    • E04F15/20—Separately-laid insulating layers; Other additional insulating measures; Floating floors for sound insulation
    • E04F15/203—Separately-laid layers for sound insulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F2290/00—Specially adapted covering, lining or flooring elements not otherwise provided for
    • E04F2290/04—Specially adapted covering, lining or flooring elements not otherwise provided for for insulation or surface protection, e.g. against noise, impact or fire
    • E04F2290/041—Specially adapted covering, lining or flooring elements not otherwise provided for for insulation or surface protection, e.g. against noise, impact or fire against noise
    • E04F2290/043—Specially adapted covering, lining or flooring elements not otherwise provided for for insulation or surface protection, e.g. against noise, impact or fire against noise with a bottom layer for sound insulation

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Floor Finish (AREA)

Abstract

PURPOSE: An interlayer insulating and impact sound absorbing member of a multilayered building is provided to reduce an impact sound by an inner air layer and to prevent from getting moldy and loose. CONSTITUTION: The interlayer insulating and impact sound absorbing member of a multilayered building comprises: a base layer(6), as a membrane manufactured with high density polyethylene having many projections(62), installed to make the projections(62) adjacent to the top of a slab; an intermediate layer(4) made of high molecular substances such as polystyrene, polyurethane, polyethylene, polyether, polyester, polypropylene, ethylene vinyl acetate, etc. and installed on the top of the base layer(6); an upper layer(2) composed of a rubber compound layer(22) having self-adhesive strength and adhered to the top of the intermediate layer(4).

Description

다층건물의 층간 단열 및 충격음 저감재 { a heat insulating and impacting sound reducing material for a multi-storey building }{A heat insulating and impacting sound reducing material for a multi-storey building}

본 발명은 다층건물의 층간 단열 및 충격음 저감재에 관한 것으로, 더욱 상세하게는 공동주택을 포함하여 다층 건물에서의 상층에서 발생된 충격음을 하층으로 전달되지 않도록 하고, 실내에서 발생된 소음을 옆실로 전달되지 않도록 하도록 하기 위해 슬래브 바닥과 벽에 매설되는 다층건물의 층간 단열 및 충격음 저감재에 관한 것이다.The present invention relates to an interlayer insulation and impact sound reduction material of a multi-storey building, and more particularly, to prevent the impact sound generated from the upper floor in a multi-storey building, including a multi-family building, to be transferred to the lower floor, and to generate noise generated in the room to the side room. The present invention relates to an interlayer insulation and impact sound reducing material of a multi-story building embedded in a slab bottom and a wall to prevent transmission.

일반적으로 우리나라 공동주택의 층간 바닥구조를 살펴보면, 슬래브 위에 기포콘크리트를 구축하고, 그 상부에 난방 배관 및 마감몰탈을 타설한 후 그 위에 장판 등의 바닥마감재를 설치하였다.In general, when looking at the floor structure of the multi-family house in Korea, foam concrete was built on the slab, heating piping and finishing mortar was placed on top of it, and floor finishing materials such as floor covering were installed thereon.

그런데 이러한 종래 공동주택의 층간 바닥구조는 상층에서 발생된 충격소음이 그대로 하층에 전달됨으로 인해 하층 거주자에게 정신적인 스트레스와 노이로제를 발생시켜 입주민들간의 마찰을 일으키는 주요원인되는 문제점이 있었다.However, the floor structure of the conventional multi-family house has a major cause of friction between the residents by generating mental stress and noirje in the lower residents because the impact noise generated in the upper floor is delivered to the lower floor as it is.

따라서 상기와 같은 충격소음에 의해 문제점을 해소하기 위한 방안중의 하나로 슬래브에 충격음 저감재를 매설하였다.Therefore, one of the measures to solve the problem by the impact noise as described above was buried in the slab impact sound reduction material.

상기 주택의 바닥 충격음 저감재는 그 성능평가 내용이 바닥충격음 차단성 외에 단열성능, 콘크리트 등 타재료와의 물리, 화학적 관계, 뜬 바닥층 상부에서 작용하는 하중에 대한 구조적 성능, 바닥충격음 저감재의 탄성특성, 난방배관 및 주위의 열환경에 대한 저항성능 등 여러 가지 성능과 시공측면에서의 문제점등을 종합적으로 감안하여야 하며, 상기 열거한 복합적인 여러가지 성능요구에 모두 충족되어야 하는 것이다.The floor impact sound reducing material of the house has the performance evaluation contents in addition to the floor impact sound blocking property, the thermal and thermal performance, the physical and chemical relationship with other materials such as concrete, the structural performance against the load acting on the floor of the floating floor, the elastic properties of the floor impact sound reducing material, Various performances such as heating piping and resistance to the surrounding thermal environment and construction problems should be taken into consideration comprehensively, and all of the complex performance requirements listed above should be satisfied.

그런데 이러한 종래 충격음 저감재는 충격음 전달 매질이 달라짐으로써 충격음 전달 차단효과를 주로 보여주는 것으로, 한가지 종류의 재질로 이루어져 있어 경량충격음에 대해서는 어느 정도 저감효과를 얻을 수 있지만 중량 충격음에 대해서는 저감효과가 저하되는 단점이 있었다.However, such a conventional impact sound reducing material mainly shows the impact sound transmission blocking effect by changing the impact sound transmission medium, it is composed of one kind of material can achieve a certain reduction effect for light weight impact sound, but the reduction effect for weight impact sound is lowered There was this.

본 발명은 상기 종래 기술의 문제점을 해소하기 위한 것으로, 충격음의 전달경로가 되는 접촉면적을 최소한으로 줄이고, 내부 공기층에 의한 충격음 저감효과를 꾀하며, 다단구조로 이루어져 충격음을 더욱 효과적으로 저감시킬 수 있도록 한 다층건물의 층간 단열 및 충격음 저감재를 제공하는 데 그 목적이 있다.The present invention is to solve the problems of the prior art, to minimize the contact area that is the transmission path of the impact sound to minimize the impact sound effect by the internal air layer, and to make the impact sound more effectively made of a multi-stage structure. The purpose is to provide an interlayer insulation and impact sound reduction material of a multi-story building.

또한 상기 목적외에 단열성능과 내수성을 더욱 향상시켜 곰팡이 및 들뜸현상을 방지할 수 있는 다층건물의 층간 단열 및 충격음 저감재를 제공하는 데 또다른 목적이 있다.In addition, there is another object to provide an interlayer insulation and impact sound reducing material of the multi-storey building to prevent the mold and lifting by further improving the heat insulating performance and water resistance.

도 1은 본 발명에 따른 다층건물의 층간 단열 및 충격음 저감재에 대한 사시도1 is a perspective view of the interlayer insulation and impact sound reducing material of a multi-storey building according to the present invention.

도 2는 본 발명에 따른 다층건물의 층간 단열 및 충격음 저감재의 실시예에 대한 단면도Figure 2 is a cross-sectional view of an embodiment of the interlayer insulation and impact sound reducing material of a multi-story building according to the present invention.

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

2 : 상단층 4 : 중간층2: top layer 4: middle layer

6 : 바닥층 22 : 고무화합물층6: bottom layer 22: rubber compound layer

23 : 폴리에틸렌 필름층 24 : 수용홈23: polyethylene film layer 24: receiving groove

26 : 측벽 62 : 돌기26: side wall 62: protrusion

100 : 슬래브 200 : 벽면100: slab 200: wall surface

300 : 마감몰탈 400 : 기포콘크리트300: finishing mortar 400: foam concrete

500 : 난방배관500: heating piping

상기한 목적을 달성하기 위해 본 발명은 슬래브 위에 기포콘크리트를 구축하고, 그 상부에 난방 배관 및 마감몰탈을 타설한 후 그 위에 장판 등의 바닥마감재를 설치한 통상의 층간 바닥구조에 있어서,In the present invention, in order to achieve the above object, in the conventional interlayer floor structure in which a foam concrete is formed on a slab, a heating pipe and a finishing mortar are poured on the slab, and a floor finishing material such as a sheet is installed thereon.

하부 저면에 다수의 돌기가 형성된 고밀도 폴리에틸렌 멤브레인을 기본모재로 하는 바닥층과; 이 바닥층의 상부에 폴리스티렌 등의 고분자 재료를 접합시켜된 중간층과; 이 중간층의 상면에는 저면에 자체접착력을 가진 고무화합물층으로 된 상단층이; 설치되어 이루어진 것으로, 상기 슬래브와 기포콘크리트 사이에 설치되어 충격음을 저감시킬 수 있고, 단열성능을 배가시킬 수 있도록 함을 특징으로 한다.A bottom layer having a high density polyethylene membrane having a plurality of protrusions formed on a lower bottom thereof as a base material; An intermediate layer obtained by bonding a polymer material such as polystyrene to the upper portion of the bottom layer; On the upper surface of the intermediate layer is a top layer of a rubber compound layer having a self-adhesive force on the bottom; It is installed, it is installed between the slab and foam concrete, it is possible to reduce the impact sound, characterized in that to double the thermal insulation performance.

이하 본 발명의 바른 실시예를 첨부된 도면을 토대로 상세히 설명하면 다음과 같다.Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

첨부된 도 1은 본 발명에 따른 다층건물의 층간 단열 및 충격음 저감재에 대한 사시도이다.1 is a perspective view of the interlayer insulation and impact sound reducing material of a multi-story building according to the present invention.

이를 참조하여 살펴보면,If you look at it,

상기 바닥층(6)은 저면에 다수의 돌기(62)를 갖는 고밀도 폴리에틸렌으로 제조된 멤브레인으로써 상기 돌기(62)가 슬래브(100)의 상면에 접하도록 설치된다.The bottom layer 6 is a membrane made of high-density polyethylene having a plurality of protrusions 62 on the bottom thereof, and the protrusions 62 are installed to contact the top surface of the slab 100.

이때 상기 바닥층(6)의 끝단을 일정 길이로 절곡시켜 직각을 이루게 한 후 상단층(2)의 측벽(26) 외면에 부착되게 하여 벽면(200)의 하단과 일정 높이로 접하도록 하였다.At this time, the end of the bottom layer 6 was bent to a certain length to form a right angle and then attached to the outer surface of the side wall 26 of the top layer 2 so as to be in contact with the bottom of the wall surface 200 at a predetermined height.

따라서 슬래브(100)와의 직접적인 접촉면적이 적어지면서 충격음 전달경로를 최소한으로 제한시킬 수 있으며, 또한 돌기(62)들 사이에 형성된 공기층이 진동으로 전달되어오던 충격음을 슬래브(100)로 직접 전달되지 못하게 차단시켜 줌으로써 충격음을 저감시킬 수 있는 것이다.Therefore, as the direct contact area with the slab 100 decreases, the impact sound transmission path can be limited to the minimum, and the air layer formed between the protrusions 62 is not transmitted directly to the slab 100 due to vibration. By blocking it, the impact sound can be reduced.

이때 상기 고밀도 폴리에틸렌 멤브레인은 열전도율이 경량기포콘크리트(400)의 4분의 1이하로써 단열효과가 매우 우수한 장점이 있다.At this time, the high-density polyethylene membrane has an excellent thermal insulation effect as the heat conductivity is less than a quarter of the lightweight foam concrete (400).

상기 중간층(4)은 폴리스티렌 외에 폴리우레탄, 폴리에틸렌, 폴리에테르, 폴리에스테르, 폴리프로필렌, 에틸렌비닐아세테이트 등의 고분자 재료로 이루어지는 것으로써 상기 바닥층(6)의 상면에 설치된다.The intermediate layer 4 is made of a polymer material such as polyurethane, polyethylene, polyether, polyester, polypropylene, ethylene vinyl acetate, in addition to polystyrene, and is provided on the top surface of the bottom layer 6.

이들 고분자 재료들은 열전도율이 낮아서 단열효과가 우수하며 충격음 흡수특성이 있는 것으로 단열성능이나 충격음 저감성능 및 제품단가를 고려하여 선택적으로 사용될 수 있다.These polymer materials have low thermal conductivity and have excellent thermal insulation effect, and have impact sound absorption characteristics, and can be selectively used in consideration of thermal insulation performance, impact sound reduction performance, and product cost.

상기 상단층(2)은 부틸 콤파운드와 같이 자체접착력을 가진 고무화합물층(22)으로 이루어져 상기 중간층(4)의 상면에 접착 고정되도록 한 후 그 상부의 수용홈(24)에 기포콘크리트(400)와 난방배관(500) 및 마감몰탈(300)이 순차적으로 타설된다.The upper layer 2 is made of a rubber compound layer 22 having a self-adhesive force, such as butyl compound, to be fixed to the upper surface of the intermediate layer 4 and then to the foam concrete 400 and the receiving groove 24 thereon Heating piping 500 and the finishing mortar 300 is poured in sequence.

이때 상기 고무화합물층(22)의 상면에 얇은 판상의 폴리에틸렌 필름을 다층으로 적층시켜 된 폴리에틸렌 필름층(23)을 형성시킬 수도 있다.In this case, the polyethylene film layer 23 formed by laminating a thin plate-like polyethylene film in multiple layers on the upper surface of the rubber compound layer 22 may be formed.

이와 같이 구성된 본 발명은 건설현장에서 층간 바닥 슬래브(100) 상면이나 객실 벽면(200) 외측에 설치한 후 그 상부에 기포콘크리트(400)를 타설하고 난방배관(500) 및 마감몰탈(300)을 타설하여 설치작업이 간단하게 완료된다.The present invention configured as described above is installed on the floor floor slab upper surface or the room wall 200 outside the construction site, and then poured foam concrete 400 on the top and heating pipe 500 and the finishing mortar 300 The installation work is completed simply by pouring.

즉, 본 발명은 패널형태나 롤 형태로 미리 제조될 수 있어 이를 건설현장에서 별도의 접착작업이 필요없이 곧바로 끼워 맞추거나 또는 적정한 크기로 절단하여 슬래브 상면에 깔아줌으로써 설치가 완료되므로 시공성이 자유롭고 간편한 것이다.In other words, the present invention can be manufactured in advance in the form of a panel or roll, so that the installation is completed by fitting them directly to the construction site without the need for a separate adhesive work or cutting them to an appropriate size and laying them on the upper surface of the slab. will be.

즉, 종래의 다층구조로 된 충격음 저감재는 사전에 접착재료를 이용하여 다층구조로 접합시켜서 제조되므로 건설현장에서 별도의 접착재료를 사용하여 저감재들사이의 틈새를 막아야하는 공정이 필요하지만 본 발명의 충격음 저감재는 건설현장에서 곧바로 다층구조로 설치가 가능하므로 제조비용을 줄일 수 있으며, 자체접착력을 가진 고무화합물층과 다층구조의 폴리에틸렌 필름과의 접합체로 이루어진 상단층을 중간층의 상면에 깔아주기만 하면 틈새를 막을 수 있으므로 기포콘크리트 타설시 아래로 흘러내리는 것을 방지할 수 있다.That is, the conventional impact sound reducing material having a multi-layer structure is manufactured by bonding in a multi-layer structure using an adhesive material in advance, so a process of preventing a gap between the reducing materials using a separate adhesive material at a construction site is required. Can reduce the manufacturing cost because it can be installed in a multi-layered structure immediately at the construction site, and if the top layer consisting of a bonded rubber compound layer and a multi-layered polyethylene film on the upper surface of the intermediate layer It can prevent the falling down during foam concrete pouring.

또한 본 발명의 충격음 저감재는 내수성이 뛰어나므로 하부의 슬래브에서 올라오는 습기를 차단함으로써 바닥장판 등의 들뜸현상을 막을 수 있다.In addition, since the impact sound reducing material of the present invention is excellent in water resistance, it is possible to prevent the phenomenon of lifting such as floor covering by blocking moisture rising from the lower slab.

이러한 내수성으로 벽체에도 사용이 가능하며 벽체 외부로부터 침투되는 습기를 차단할 수 있으며, 또한 차음성능 또한 우수하여 벽체간 소음을 차단시켜준다.This water resistance can also be used on the wall and can block the moisture penetrating from the outside of the wall, and also excellent sound insulation performance to block the noise between the walls.

이상에서 설명한 바와 같이 본 발명에 따른 다층건물의 층간 단열 및 충격음 저감재는 층간 슬래브의 상면에 상기 바닥층과 중간층 및 상단층을 순차적으로 적층시킨 후 그 상면에 기포콘크리트와 마감몰탈을 타설하도록 한 것으로, 충격음의 전달경로가 되는 접촉면적을 바닥층의 돌기에 의해 최소한으로 줄이고, 내부 공기층에 의한 충격음 저감효과를 꾀하며, 다단구조로 이루어져 충격음을 더욱 효과적으로 저감시킬 수 있으며, 단열성능이 향상되고, 외부로부터 침투되는 습기를 차단할 수 있어 바닥마감재 하부의 곰팡이 및 들뜸현상과 벽지에서 생기는 곰팡이 및 벽지손상을 효과적으로 막아줄 수 있는 유용한 효과가 제공된다.As described above, the interlayer insulation and impact sound reducing material of the multi-layered building according to the present invention is to stack the bottom layer, the middle layer and the top layer sequentially on the upper surface of the interlayer slab, and then place foam concrete and finishing mortar on the upper surface thereof. The contact area, which is the transmission path of the impact sound, is minimized by the projection of the bottom layer, the effect of reducing the impact sound by the internal air layer, and the multi-stage structure can reduce the impact sound more effectively, improve the thermal insulation performance, and penetrate from the outside. Moisture can be prevented to provide a useful effect that can effectively prevent the mold and lifting of the bottom of the floor finishing material and mold and wallpaper damage caused from the wallpaper.

Claims (8)

슬래브와 기포콘크리트 사이에 설치되는 다층건물의 층간 충격음 저감재에 있어서,In the interlayer impact sound reducing material of a multi-storey building provided between a slab and foam concrete, 하부 저면에 다수의 돌기(62)를 갖는 고밀도 폴리에틸렌 멤브레인 단일층으로 이루어진 바닥층(6)이 구성된 것을 특징으로 하는 다층건물의 층간 단열 및 충격음 저감재.An interlayer insulation and impact sound reducing material of a multi-story building, characterized in that the bottom layer (6) is composed of a single layer of a high density polyethylene membrane having a plurality of protrusions (62) on the bottom surface. 제1항에 있어서, 상기 바닥층(6)의 상부에 폴리스티렌으로 된 중간층(4)을 접합시키고, 그 상부에 자체 접착력을 가진 고무화합물층(22)으로 된 상단층(2)을 하여서 3단의 다층구조로 구성한 것을 특징으로 하는 다층건물의 층간 단열 및 충격음 저감재.The multi-stage multilayer according to claim 1, wherein an intermediate layer (4) made of polystyrene is bonded to an upper part of the bottom layer (6), and an upper layer (2) made of a rubber compound layer (22) having self-adhesive force is formed on the upper part. The interlayer insulation and impact sound reducing material of a multi-story building, which is composed of a structure. 제2항에 있어서, 상기 중간층(4)은 폴리스티렌 대신에 폴리우레탄, 폴리에틸렌, 폴리에테르, 폴리에스테르, 에틸렌비닐아세테이트 중 어느 하나가 사용되는 것을 특징으로 하는 다층건물의 층간 단열 및 충격음 저감재.3. The interlayer insulation and impact sound reducing material according to claim 2, wherein the intermediate layer (4) is one of polyurethane, polyethylene, polyether, polyester, and ethylene vinyl acetate instead of polystyrene. 제1항에 있어서, 상기 바닥층(6)은 고밀도 폴리에틸렌 멤브레인 대신에 폴리비닐아세테이트, 폴리프로필렌, 폴리스티렌 중 어느 하나가 사용되는 것을 특징으로 하는 다층건물의 층간 단열 및 충격음 저감재.The interlayer insulation and impact noise reduction material according to claim 1, wherein the bottom layer (6) is one of polyvinylacetate, polypropylene, and polystyrene instead of a high density polyethylene membrane. 제1항에 있어서, 돌기(62)는 슬래브(100)의 상면과 접촉되도록 하되, 돌기(62)와 슬래브(100)의 접촉면적은 1 ㎡당 0.001㎡ 내지 0.9㎡ 로 이루어진 것을 특징으로 하는 다층건물의 층간 단열 및 충격음 저감재.According to claim 1, wherein the projection 62 is in contact with the upper surface of the slab 100, the contact area of the projection 62 and the slab 100 is a multi-layer, characterized in that consisting of 0.001 m 2 to 0.9 m 2 per m 2 Insulation between floors and shock absorbers in buildings. 제1항에 있어서, 돌기(62)의 높이는 0.2 mm 내지 20 mm 로 이루어진 것을 특징으로 하는 다층건물의 층간 단열 및 충격음 저감재.The method of claim 1, wherein the height of the projections 62 is 0.2 mm to 20 mm interlayer insulation and impact sound reduction material of a multi-story building. 제2항에 있어서, 상기 상단층(2)은 접착성을 가진 고무화합물층(22)의 상면에 다층구조의 폴리에틸렌 필름층(23)이 접착되어 이루어진 것을 특징으로 하는 다층건물의 층간 단열 및 충격음 저감재.3. The interlayer insulation and impact sound reduction of the multilayer building according to claim 2, wherein the upper layer 2 is formed by adhering a polyethylene film layer 23 having a multi-layer structure to the upper surface of the adhesive rubber compound layer 22. ashes. 제7항에 있어서, 상기 고무화합물층(22)은 부틸 콤파운드로 이루어짐을 특징으로 하는 다층건물의 층간 단열 및 충격음 저감재.8. The interlayer insulation and impact noise reducing material according to claim 7, wherein the rubber compound layer (22) is made of butyl compound.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100646052B1 (en) * 2005-04-29 2006-11-23 주식회사 청양 Carrying out method of using soundproof indoor floor and structure
KR100655759B1 (en) * 2005-05-09 2006-12-11 양아산업(주) A method of construction with preventing crack for finishinf mortar
KR100701858B1 (en) * 2005-04-28 2007-03-30 송태식 Establishment construction and soundproof mat
KR20220143997A (en) * 2021-04-16 2022-10-26 현대엔지니어링 주식회사 Interlayer noise reduction thermoplastic elastomer composition having thermal insulation and thermal stability properties and foam thereof

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KR100191867B1 (en) * 1996-06-10 1999-06-15 임장규 Panel for protesting the shake in buildings and constructions method thereby

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100701858B1 (en) * 2005-04-28 2007-03-30 송태식 Establishment construction and soundproof mat
KR100646052B1 (en) * 2005-04-29 2006-11-23 주식회사 청양 Carrying out method of using soundproof indoor floor and structure
KR100655759B1 (en) * 2005-05-09 2006-12-11 양아산업(주) A method of construction with preventing crack for finishinf mortar
KR20220143997A (en) * 2021-04-16 2022-10-26 현대엔지니어링 주식회사 Interlayer noise reduction thermoplastic elastomer composition having thermal insulation and thermal stability properties and foam thereof

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