WO2009014341A2 - Isolant de plancher contre les bruits d'impact pour construction et méthode de construction d'un plancher utilisant celui-ci - Google Patents

Isolant de plancher contre les bruits d'impact pour construction et méthode de construction d'un plancher utilisant celui-ci Download PDF

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Publication number
WO2009014341A2
WO2009014341A2 PCT/KR2008/004165 KR2008004165W WO2009014341A2 WO 2009014341 A2 WO2009014341 A2 WO 2009014341A2 KR 2008004165 W KR2008004165 W KR 2008004165W WO 2009014341 A2 WO2009014341 A2 WO 2009014341A2
Authority
WO
WIPO (PCT)
Prior art keywords
floor
impact noise
noise
floor impact
reinforcing member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2008/004165
Other languages
English (en)
Other versions
WO2009014341A3 (fr
Inventor
Chung Hwa Lee
Seong Chan Kim
Jun Yup Kim
Seong Chan Park
Ho Yeon Chang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Chem Ltd
Original Assignee
LG Chem Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LG Chem Ltd filed Critical LG Chem Ltd
Priority to EP08778822A priority Critical patent/EP2171176A4/fr
Priority to CN2008800253703A priority patent/CN101755098B/zh
Publication of WO2009014341A2 publication Critical patent/WO2009014341A2/fr
Publication of WO2009014341A3 publication Critical patent/WO2009014341A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/12—Flooring or floor layers made of masses in situ, e.g. seamless magnesite floors, terrazzo gypsum floors
    • 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
    • E04F15/188—Edge insulation strips, e.g. for floor screed layers
    • 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

Definitions

  • the present invention relates to a floor impact noise isolator for construction and a method for constructing a floor using the same, and more particularly, to a floor impact noise isolator for construction, wherein a honeycomb reinforcing member is bonded to or laminated on a noise isolating body to thereby have excellent strength and prevent a crack from occurring in a mortar layer, and a local load distribution is transformed to a surface load distribution to thereby improve the noise isolation property.
  • buildings for example, villas such as multiplex houses or row houses, office buildings having a lot of rental offices therein, and high-rise buildings of a public aggregate type such as apartments, schools, hospitals, or dormitories have a noise isolator installed to a wall or floor thereof in order to isolate noise.
  • thermoplastic flame-retardant foam which may be used as a floor impact noise interceptor (or isolator) of a building and has a foaming magnitude of 5 to 200 and foam cells with a diameter of 10
  • a resin foam (synthetic resin foam) is generally employed as the noise isolator.
  • a resin foam is generally made by adding a foaming agent to a base resin, such as polyethylene (PE), polystyrene (PS), polyvinyl chloride (PVC), polyurethane (PU) and melamine resin and then foaming it, and has a plurality of open cells and closed cells.
  • the resin foam has heat insulation and impact absorption properties together with noise isolation property due to the above cell structure, thereby being useful as a construction material.
  • a nonwoven fabric may also be used as the noise isolator.
  • the resin foam cannot be easily recycled, but the nonwoven fabric can be easily recycled, so that the nonwoven fabric is more advantageous in aspect of recycling.
  • ⁇ 14> In general, when constructing a floor of a building, such a resin foam or nonwoven fabric as a noise isolator is laminated on a concrete slab base, and then a mortar layer, i.e., a lightweight bubble concrete layer and/or a finishing decorative layer is cast thereon and cured.
  • a mortar layer i.e., a lightweight bubble concrete layer and/or a finishing decorative layer is cast thereon and cured.
  • the noise isolator composed of resin foam or nonwoven fabric has a problem in that bad construction and cracks may occur in the mortar layer.
  • the conventional noise isolator has no self-supporting force and is too flexible, so that it is inconvenient to position and handle it.
  • due to such weak supporting force and low strength it is difficult to carry out construction work with large dimensions, thereby consuming much time for the construction.
  • a mortar layer e.g., a lightweight bubble concrete layer or a finishing decorative layer
  • a mortar layer that is cast and plastered on the noise isolator may be cracked due to the elasticity of the noise isolator (particularly, a foam- based noise isolator).
  • the conventional noise isolator is weak in strength and has the elasticity, it is easily depressed by a local load transferred by heavy furniture, such as a wardrobe, a bed and a table. Thus, there is a problem in that the depression caused by local load deteriorates the noise isolation property.
  • An object of the present invention is to provide a floor impact noise isolator for construction, wherein the floor impact noise isolator for construction is configured to have a reinforcing member for supporting a noise isolating body, the reinforcing member is provided with inflow holes, and the inflow holes are filled with mortar when a mortar layer is plastered to thereby have excellent strength and prevent a crack from occurring in the mortar layer, and a local load distribution is transformed to a surface load distribution to thereby improve the noise isolation property, and to provide a method for constructing a floor using the same.
  • Another object of the present invention is to provide a floor impact noise isolator for construction, wherein a resin foam with an improved foam structure and property is used as a noise isolating body to allows effective absorption and dispersion (exhaustion) of noise and vibration generated by an impact from an upper floor thereby ensuring an excellent floor impact noise isolation property by applying, and to provide a method for constructing a floor using the same.
  • the present invention for achieving the objects provides a floor impact noise isolator for construction, comprising:
  • ⁇ 23> a reinforcing member formed with inflow holes which is filled with mortar.
  • the reinforcing member may have a thickness of 3 mm to 15 mm, and the inflow hole formed therein may have a shape of polygon (rectangle, hexagon, or the like), circle, oval, or a combination thereof.
  • a honeycomb panel with a honeycomb structure may be usefully employed as the reinforcing member.
  • the noise isolating member may comprise at least one selected from the group consisting of resin form, nonwoven fabric, woven fabric, glass wool, and rock wool, preferably selected from resin foams with an improved foaming structure and property. More specifically, the resin foam having open cells with a diameter of 0.05 mm to 2.0 mm, a ratio of open cells of 20% or more, a
  • the floor impact noise isolator for construction according to the present invention may further comprise a waterproof sheet interposed between the noise isolating body and the reinforcing member.
  • a method for constructing a floor of a building comprising the steps of: ⁇ 2x> installing the floor impact noise isolator according to the present invention; and ⁇ 29> introducing mortar into the inflow hole formed in the reinforcing member of the noise isolator.
  • a noise isolating body is supported by a reinforcing member, and inflow holes formed in the reinforcing member is filled with mortar to thereby provide excellent strength and prevent a crack from occurring in the mortar layer, and a local load distribution is transformed to a surface load distribution to thereby improve the noise isolation property.
  • a resin foam with an improved foam structure and property is used as the noise isolating body according to the present invention, since noise and vibration generated by an impact are effectively absorbed and dispersed (exhausted), there is an advantage in that the more excellent floor impact noise isolation property is exhibited.
  • FIG. 1 is a perspective view of an impact noise isolator according to the first embodiment of the present invention.
  • Fig. 2 is a sectional view taken along the line A-A of Fig. 1.
  • Fig. 3 is a perspective view of an impact noise isolator according to the second embodiment of the present invention.
  • Fig.4 is a sectional view taken along the line B-B of Fig.3.
  • Fig. 5 is a sectional view of an impact noise isolator according to the third embodiment of the present invention.
  • Fig. 6 is a sectional view of a floor construction structure for illustrating a method for constructing a floor of a building according to the present invention.
  • Fig. 7 is a scanning electronic microscope (SEM) photograph of a resin foam usefully applied as a noise isolating body of the present invention.
  • SEM scanning electronic microscope
  • Fig. 1 is a perspective view of an impact noise isolator according to the first embodiment of the present invention
  • Fig. 2 is a sectional view taken along the line A-A of Fig. 1.
  • Fig. 3 is a perspective view of an impact noise isolator according to the second embodiment of the present invention
  • Fig. 4 is a sectional view taken along the line B-B of Fig. 3.
  • bonding means that components of an impact noise isolator of the present invention are coupled with each other using a coupling means such as high melting point adhesive, heat, ultrasonic wave, and double-sided adhesive tape and thus opposite surfaces of the components are coupled either entirely or partially.
  • laminate used herein means that components are stacked on each another without any additional coupling means.
  • an impact noise isolator 100 according to the present invention comprises a noise isolating body 10 and a reinforcing member 20 for supporting the noise isolating body 10.
  • the reinforcing member 20 is bonded to or laminate on at least one surface of the noise isolating body 10. Specifically, the reinforcing member 20 may be bonded to (or laminated on) only one surface of the noise isolating body 10, or bonded to (or laminated on) both surfaces thereof.
  • the accompanying drawings illustrate that the reinforcing member is bonded only to the upper surface of the noise isolating body 10. At this time, the reinforcing member 20 and the noise isolating body 10 are installed to a floor of a building such that the reinforcing member 20 is positioned above and the noise isolating body 10 is positioned below.
  • the noise isolating body 10 of the present invention comprises any material having noise isolation property, for example any one selected from resin foam, nonwoven fabric, woven fabric, glass wool, rock wool, and a combination thereof. Any one or more materials may be selected from the above and then bonded (or laminated) in the form of two or more layers.
  • the reinforcing member 20 functions to reinforce the noise isolating body 10 in rigidity and may be selected from metal and/or plastic.
  • the reinforcing member 20 is divided by partitions 21 to have a plurality of inflow holes 22 formed therein.
  • the inflow holes 22 are filled with mortar when a mortar layer 200 (see Fig. 6) is formed by being cast.
  • the inflow hole 22 may have any shape selected from a polygon (for example, triangle, rectangle, hexagon and octagon), a circle and an oval, or a combination thereof.
  • the inflow holes 22 may be formed in a regular or irregular pattern in the reinforcing member 20. Figs.
  • FIGS. 1 and 2 show a honeycomb panel having a honeycomb structure in which the inflow hole 22 has a hexagonal shape in a regular pattern; and Figs. 3 and 4 show a honeycomb panel having a honeycomb structure in which the inflow hole 22 has a rectangular shape in a regular pattern.
  • the inflow holes 22 may be bored in a vertical direction (an up and down direction in Fig. 2) as shown in Fig. 2, or not be bored in a vertical direction as shown in Fig. 4. That is, the reinforcing member 20 may have a bottom plate 24 as shown in Fig.4.
  • the inflow hole 22 preferably has a width T of 3 mm or more. If the inflow hole 22 has a width T less than 3 mm, mortar may not easily flow thereinto, thereby deteriorating the constructing efficiency.
  • the width T of the inflow hole 22 means a diameter in a case where the inflow hole 22 has a circular shape. If the inflow hole 22 has a polygonal or oval shape, the width T means a diagonal length. More specifically, the diagonal length means a length of the line passing through the center C (see Figs. 1 and 3) of the inflow hole 22.
  • the width T of the inflow hole 22 is preferably 3 mm or more as mentioned above, for example 4 mm, 50 mm, 63 mm or the like, and may be 200 mm to the maximum although not limited thereto.
  • the reinforcing member 20 preferably has a thickness of 3 mm to 15 mm. At this time, if the reinforcing member 20 has too small thickness, the inflow hole 22 to be filled with mortar does not have a sufficient space (volume), which may be undesirable in aspect of strength reinforcement. On the contrary, if the reinforcing member 20 has too large thickness, there may be limitations in construction.
  • the impact noise isolator 100 comprises the noise isolating body 10 and the reinforcing member 20, and waterproof sheet, a metal plate or a double-sided adhesive film may be further bonded to or laminated on or the noise isolating body and reinforcing member, or the noise isolating body and reinforcing member are coated with a cohesive agent.
  • Fig. 5 is a sectional view of an impact noise isolator 100 according to a third aspect of the present invention.
  • the floor impact noise isolator 100 according to the present invention may further include a waterproof sheet 30 bonded (or laminated) between the noise isolating body 10 and the reinforcing member 20.
  • the waterproof sheet 30 has a waterproof property, and may be composed of, for example, a plastic film with impermeableness to liquid or a material in which nonwoven fabric or woven fabric such as polyester fiber is impregnated or coated with a synthetic resin to be provided with a waterproof property.
  • Fig. 6 is a sectional view of a floor construction structure for illustrating a method for constructing a floor of a building according to the present invention, wherein the floor impact noise isolator shown in Figs. 1 and 2 is applied.
  • the method for constructing a floor of a building according to the present invention at least includes the steps of installing the floor impact noise isolator 100 of the present invention, and casting and plastering mortar on the floor impact noise isolator 100.
  • the method includes the steps of installing the floor impact noise isolator 100 on a concrete slab S, and then casting and plastering mortar on the floor impact noise isolator 100 so that a mortal layer 200 is formed on the reinforcing member 20 while mortar flows (or fills) in the inflow holes 22 formed in the reinforcing member 20 of the floor impact noise isolator 100.
  • an unexplained reference numeral 300 designates a sidewall noise isolating material (commonly an insulating material) for isolating or absorbing noise of a wall W.
  • a general mortar such as lightweight bubble concrete plaster (a mixture of sand, cement and foaming agent) or general concrete plaster (a common decorative mortar that is a mixture of sand and cement), and the mortar layer 200 formed of such mortar can be a lightweight bubble concrete layer or a finishing decorative layer.
  • an insulating material (not shown) may be bonded (or laminated) or installed between the slab S and the floor impact noise insulator 100, and pipe lines for heating may be buried or installed in the mortar layer 200.
  • a common floor material (tiles or floor cover) is constructed on the mortar layer 200 for finishing.
  • the waterproof sheet 30 is interposed between the noise isolating body 10 and the reinforcing member 20.
  • the bonded (or laminated) reinforcing member 20 ensures the supporting force of the noise isolating body 10 such as a resin foam or the like, thereby improving a constructing efficiency and preventing a crack of the mortar layer 200 that may be caused by elasticity.
  • the reinforcing member 20 itself improves the strength, and the inflow holes 22 of the reinforcing member 20 is filled with ⁇
  • the mortar thereby further improving the strength. Also, since the strength is reinforced as described above and a local load transferred from a furniture product (e.g., a wardrobe or table) is transformed into a surface load distribution by the reinforcing member 20 having a plate shape, a depression phenomenon caused by a local load is prevented and thus the noise isolation property that may be deteriorated by the depression is improved.
  • a furniture product e.g., a wardrobe or table
  • the noise isolating body 10 preferably comprises a resin foam that is advantageous in insulation and impact absorption properties together with noise isolation property, and a resin foam with a foaming structure and property that will be mentioned below is more preferred. This is effective in isolation of floor impact noise of a building.
  • Fig. 7 is a scanning electronic microscope (SEM) photograph of a resin foam (polyurethane foam), which shows a foaming structure of a resin foam usefully applicable to the noise isolating body 10 of the present invention.
  • the resin foam used as the noise isolating body 10 preferably includes a plurality of open cells 15 with a diameter of 0.05 mm to 2.0 mm and a ratio of open cells of 20% or more according to a preferred embodiment of the present invention.
  • the open cell 15 has a diameter less than 0.05 mm, the space capable of dispersing and exhausting noise is decreased, which is undesirable in noise isolation.
  • the open cell 15 has a diameter exceeding 2.0 mm, the density thereof is decreased, which is undesirable in mechanical property.
  • the ratio of open cells is less than 20%, connection passages between the cells are reduced, which may deteriorate noise isolation property.
  • the resin foam may have the open cells 15 and closed cells as a foam cell structure.
  • the foam cell structure may be entirely composed of the open cells 15 (the ratio of open cells is 100%) or composed of the open cells 15 and closed cells in combination such that the open cells 15 occupy 20% or more of the entire cell volume (i.e., the ratio of open cells is 20% or more).
  • the ratio of open cells is preferably 20% to 95%. More preferably, the ratio of open cells is 80% or above for better noise ⁇
  • any cell having at least one side open is considered as the open cell 15.
  • the resin foam preferably has a density of 2.0 kg/m to
  • the noise isolation property, mechanical property and impact absorption property are supplementary with each other.
  • the noise isolation property is advantageous but the mechanical property or impact absorption property is advantageous.
  • the resin foam preferably has a compressive strength of 5
  • the compressive strength is a value according to a KS standard pursuant to KS M 6579.
  • the impact noise isolation property may be disadvantageous although the mechanical property is advantageous.
  • the resin foam preferably has a dynamic elastic
  • the dynamic elastic coefficient and the loss factor are values according to KS standard pursuant to KS F 2868.
  • the noise isolating body 10 has the open cells 15, the density and/or the compressive strength, as mentioned above, the noise isolating body has an effective impact noise isolation property with excellent mechanical property ensured.
  • the aforementioned resin foam is prepared of a foaming resin composition in which at least a foaming agent is contained in a base resin. At this time, a foam magnitude is preferably 500% (five times) or more.
  • an additive selected from phosphorus-based or halogen-based flame retardant, colored pigment, inorganic substance as a filler, dispersing agent and surfactant may be added to the foaming resin composition used as a material of the resin foam, as desired.
  • the base resin includes a thermoplastic resin and a thermosetting resin, for example at least one selected from polyurethane, polyurea, polyvinyl chloride, polypropylene, polyethylene, polystyrene, polyvinyl acetate, ethylene vinyl acetate, melamine resin, phenol resin, acryl resin, and their derivatives, or a mixture of two or more thereof.
  • the base resin may comprise at least one selected from melamine resin, polyurethane, polyethylene, polystyrene, polypropylene and ethylene vinyl acetate, or a mixture of two or more thereof. More preferably, melamine or polyurethane allowing a cell structure to be freely formed and being excellent in mechanical property and impact noise isolation property as compared with other materials is used.
  • the resin foam is prepared by foaming the resin as listed above, and may comprise a polyurethane foam, a polyurea foam, a polyvinyl chloride foam, a polypropylene foam, a polyethylene foam, a polystyrene foam, a polyvinyl acetate foam, an ethylene vinyl acetate foam, a melamine foam, a phenol foam, an acryl foam, or the like.
  • the foaming agent may comprise any material capable of foaming the aforementioned base resin and thus forming a foam structure, for example an organic foaming agent, such as sulfonylhydrazide, including p,p' oxybis(benzenesulfonylhydrazide) , benzenesulfonylhydrazide, toluenesulfonylhydrazide or the like, azo compound, including azodicarbonamide (ADCA), azobisisophthylonitrile or the like, and nitroso compound, including N,N' dinitrosopentamethylenetetramine, N 1 N' dimethyl-N,N' dinitrosoterephthalamide or the like; inorganic foaming agents, such as sodium bicarbonate and ammonium bicarbonate; water; carbon dioxide; inert gas (nitrogen, air, helium, neon, or the like); and the like.
  • organic foaming agent such as sulfonylhydrazide,
  • a foaming structure and property (density, compressive strength, or the like) can be controlled by adjusting content of components of the composition or the amount of composition to be input into a mold.
  • the noise isolating body 10 is supported by the reinforcing member 20, and the inflow holes 22 formed in the reinforcing member 20 is filled with mortar, thereby having excellent strength and preventing a crack from occurring in the mortar layer 200. Further, a local load distribution is transformed into a surface load distribution, thereby improving a noise isolation property.
  • a resin foam having an improved foaming structure and property is used as the noise isolating body 10 in the present invention, there is advantageous effect in that noise and vibration generated particularly by an impact are effectively absorbed and dispersed (exhausted), thereby giving an excellent floor impact noise isolation property. Accordingly, the present invention may be usefully applied to a floor construction for floor impact noise isolation of a building.

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

Abstract

Cette invention concerne un isolant de plancher contre les bruits d'impact pour construction, comprenant un corps d'isolation acoustique ; et un élément de renforcement formé avec un orifice d'admission qui est rempli de mortier. De plus, la présente invention concerne une méthode de construction d'un plancher d'un bâtiment, comprenant les étapes consistant à : installer l'isolant de plancher contre les bruits d'impact selon la présente invention ; et introduire du mortier dans l'orifice d'admission formé dans l'élément de renforcement de l'isolant acoustique. Selon la présente invention, le corps d'isolation acoustique est supporté par l'élément de renforcement et l'orifice d'admission formé dans l'élément de renforcement est rempli de mortier, ce qui lui confère une résistance excellente et empêche la formation de fissures dans la couche de mortier. En outre, une distribution locale des charges est transformée en une distribution superficielle des charges, améliorant ainsi une propriété d'isolation acoustique.
PCT/KR2008/004165 2007-07-20 2008-07-16 Isolant de plancher contre les bruits d'impact pour construction et méthode de construction d'un plancher utilisant celui-ci Ceased WO2009014341A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP08778822A EP2171176A4 (fr) 2007-07-20 2008-07-16 Isolant de plancher contre les bruits d'impact pour construction et méthode de construction d'un plancher utilisant celui-ci
CN2008800253703A CN101755098B (zh) 2007-07-20 2008-07-16 建筑用地板冲击噪音隔离装置和使用该隔离装置构建地板的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2007-0072916 2007-07-20
KR1020070072916A KR101133056B1 (ko) 2007-07-20 2007-07-20 건축용 층간 차음재 및 이를 이용한 바닥 시공방법

Publications (2)

Publication Number Publication Date
WO2009014341A2 true WO2009014341A2 (fr) 2009-01-29
WO2009014341A3 WO2009014341A3 (fr) 2009-03-19

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PCT/KR2008/004165 Ceased WO2009014341A2 (fr) 2007-07-20 2008-07-16 Isolant de plancher contre les bruits d'impact pour construction et méthode de construction d'un plancher utilisant celui-ci

Country Status (4)

Country Link
EP (1) EP2171176A4 (fr)
KR (1) KR101133056B1 (fr)
CN (1) CN101755098B (fr)
WO (1) WO2009014341A2 (fr)

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WO2011076033A1 (fr) * 2009-12-22 2011-06-30 广东盈然木业有限公司 Plancher en bois renforcé

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KR101407185B1 (ko) * 2014-01-06 2014-06-13 이재숙 층간소음방지장치
KR101707540B1 (ko) * 2016-08-25 2017-02-16 정창욱 단열 및 방음 기능을 갖는 바닥재 및 이를 이용한 층간 소음 방지 구조
CN110832017A (zh) * 2017-07-07 2020-02-21 积水化学工业株式会社 树脂发泡体、树脂发泡体片、粘合带、车辆用部件和建筑部件
US11421428B2 (en) 2018-07-05 2022-08-23 Econcore N.V. Floating floor system
KR102463319B1 (ko) * 2021-09-13 2022-11-07 주식회사 에스아이판 구속도를 낮추어 바닥충격음을 개선하는 모르타르 시공방법 및 이를 이용한 바닥 구조
KR102855065B1 (ko) * 2021-12-23 2025-09-03 롯데케미칼 주식회사 발포성 수지 조성물, 그 제조방법 및 이로부터 제조된 발포 성형체
KR102621164B1 (ko) * 2022-10-20 2024-01-04 이인우 층간소음 저감을 위한 바닥구조 및 그 시공 방법

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EP2171176A2 (fr) 2010-04-07
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EP2171176A4 (fr) 2012-03-07
CN101755098A (zh) 2010-06-23
CN101755098B (zh) 2013-01-16

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