JP2002326880A - Inorganic sound absorber and its manufacturing method - Google Patents
Inorganic sound absorber and its manufacturing methodInfo
- Publication number
- JP2002326880A JP2002326880A JP2001137125A JP2001137125A JP2002326880A JP 2002326880 A JP2002326880 A JP 2002326880A JP 2001137125 A JP2001137125 A JP 2001137125A JP 2001137125 A JP2001137125 A JP 2001137125A JP 2002326880 A JP2002326880 A JP 2002326880A
- Authority
- JP
- Japan
- Prior art keywords
- cement
- sound
- weight
- surface material
- sound absorber
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/52—Sound-insulating materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、鉄道、道路、空
港、工場、工事現場等の騒音対策に使用する耐衝撃性に
優れた吸音体及びその製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound-absorbing body having excellent impact resistance used for noise control in railways, roads, airports, factories, construction sites, and the like, and a method of manufacturing the same.
【０００２】[0002]
【従来の技術】従来の吸音体としては無機繊維を熱硬化
性樹脂にて成型したものや、穴明きボード、有機、無機
発泡体、あるいは粒子状物質を有機、無機結合材にて成
型した多孔質体などが使用されている。こうしたなかで
無機軽量骨材をセメント系バインダーで成型した吸音体
は、原料が安価で、かつ耐久性に優れるという特徴を有
するものの、成型には金型を必要とし、生産能率はその
数と硬化、脱型速度に支配され、より多くの金型を用意
し、より早く硬化、脱型させなければその生産能率は上
がらなかった（例えば、特開平6-48810号公報参照）。
また、樹脂系バインダーに較べ衝撃に弱く、短繊維の混
入や、ネット状補強材を使用したりする方法が開発され
ているが、前者は耐衝撃性が充分ではなく、ネットの埋
入には生産効率の点で問題があった（例えば、特開平11
-109977号公報、特許第3041815号公報参照）。2. Description of the Related Art As a conventional sound absorber, an inorganic fiber molded from a thermosetting resin, a perforated board, an organic or inorganic foam, or a particulate material molded from an organic or inorganic binder is used. A porous body or the like is used. Under these circumstances, sound absorbers made by molding inorganic lightweight aggregates with a cement-based binder have the characteristics of low cost and excellent durability, but require molds for molding, and the production efficiency is the number and curing The production efficiency was not improved unless more molds were prepared, cured and demolded more quickly, being governed by the demolding speed (see, for example, JP-A-6-48810).
Also, compared to resin binders, it is more vulnerable to impact, and methods of mixing short fibers and using net-like reinforcing materials have been developed, but the former has insufficient impact resistance and is not suitable for embedding nets. There was a problem in terms of production efficiency (see, for example,
-109977, Patent No. 3041815).
【０００３】[0003]
【発明が解決しようとする課題】本発明は、前記の問題
点を解決し、生産性が向上した吸音体及びその製造方法
を提供するものである。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and provides a sound absorber having improved productivity and a method for manufacturing the same.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、前記の課
題を解決するため特定の粒子径の無機質ガラス発泡体と
セメント、水及びその他の骨材、繊維等を混練し、音響
透過性のあるシート状物質、例えば特定の繊維密度から
成る不織布や特定の開口率をもったシートにエンボス加
工により突起状の凹凸を付与して成型された表面材上に
て吸音体を成型し、セメントバイダーの硬化後は不織布
やシートシートにて成型された表面材が吸音体と接着一
体化することにより脱型の工程が簡略化可能となり、同
時に不織布やシートの補強効果により吸音体の耐衝撃性
を向上させることができることを見出し本発明を完成し
た。Means for Solving the Problems In order to solve the above-mentioned problems, the present inventors knead an inorganic glass foam having a specific particle size with cement, water and other aggregates, fibers, etc. With a sheet-like substance with a certain density, for example, a non-woven fabric having a specific fiber density or a sheet having a specific opening ratio, a sound absorber is formed on a surface material that is formed by embossing to form projections and recesses, and cement. After the binder is cured, the surface material molded from the nonwoven fabric or sheet sheet is bonded and integrated with the sound absorber, thereby simplifying the demolding process, and at the same time, the impact resistance of the sound absorber due to the reinforcing effect of the nonwoven fabric and sheet Have been found, and the present invention has been completed.
【０００５】本発明は、主たる骨材として粒子径０．３
〜１．２mmの無機質軽量骨材１００重量部を３５〜４５
重量部のセメントで硬化させてなる吸音体である。ま
た、本発明は、前記硬化物とエンボス加工により突起を
付与した補強材を兼ねた音響透過性の表面材とによって
構成された吸音体である。更に、本発明は、主たる骨材
として粒子径０.３〜１．２ｍｍの無機質軽量骨材１０
０重量部を３５〜４５重量部のセメント及び水を混練
し、音響透過性の表面材上にてにて成型、硬化させ、補
強材を兼ねた表面材と一体化させることを特徴とした吸
音体の製造方法である。上記吸音体又は吸音体の製造方
法において、無機質軽量骨材と共に他の骨材及び繊維か
ら選択される１種以上の骨材又は充填材を無機質軽量骨
材に対して等量以下配合することも有利である。According to the present invention, a particle diameter of 0.3 as a main aggregate is used.
100 parts by weight of inorganic lightweight aggregate of ~ 1.2mm 35-45
It is a sound absorber made by hardening with weight parts of cement. Further, the present invention is a sound absorber composed of the cured product and a sound-transmitting surface material which also serves as a reinforcing material provided with projections by embossing. Further, the present invention provides an inorganic lightweight aggregate 10 having a particle diameter of 0.3 to 1.2 mm as a main aggregate.
0 parts by weight is kneaded with 35 to 45 parts by weight of cement and water, molded and cured on a sound-permeable surface material, and integrated with a surface material also serving as a reinforcing material. It is a method of manufacturing the body. In the method for producing the sound absorbing body or the sound absorbing body, one or more types of aggregates or fillers selected from other aggregates and fibers may be blended with the inorganic lightweight aggregate in an equal amount or less with the inorganic lightweight aggregate. It is advantageous.
【０００６】[0006]
【発明の実施の形態】本発明の吸音体及びその製造方法
を詳細にする。本発明の吸音体は、無機質軽量骨材１０
０重量部を３５〜４５重量部のセメントで硬化させてな
る硬化物である場合と、この硬化物とエンボス加工によ
り突起を付与した補強材を兼ねた音響透過性の表面材と
が一体化されている場合とがある。後者の場合、表面材
は無機質軽量骨材とセメント及び水、その他の骨材、繊
維等を必要により混練し、前記表面材上にて成形し、セ
メントが硬化後も表面材を取り外すことなくそのまま補
強材として使用する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The sound absorber of the present invention and a method for manufacturing the same will be described in detail. The sound absorber of the present invention is made of an inorganic lightweight aggregate 10
In the case of a cured product obtained by curing 0 parts by weight with 35 to 45 parts by weight of cement, the cured product is integrated with an acoustically permeable surface material which also serves as a reinforcing material provided with projections by embossing. And sometimes. In the latter case, the surface material is kneaded with inorganic lightweight aggregate, cement and water, other aggregates, fibers and the like as necessary, molded on the surface material, and without removing the surface material even after the cement is hardened. Used as reinforcement.
【０００７】本発明で使用する表面材は、音響透過性の
表面材となり得るものであれば制限はないが、不織布、
織布、多孔質板、有孔フィルム状物質等から構成される
ものが好ましく挙げられる。有孔フィルム状物質として
は、テフロン（登録商標）、ポリオレフィン、ポリエチ
レン、ポリスチレン、塩化ビニル等の各種プラスチック
フィルムが使用可能であり、強度と経済性の観点から厚
さは150〜500μｍが好ましく、またその有効開口率は音
響透過性の観点から40％以上が好ましい。不織布を構成
する繊維としては、ガラス繊維等の無機繊維、ポリエス
テル繊維等の合成繊維、綿等の天然繊維等があるが、有
機質繊維が好ましい。有機質繊維不織布はポリエステル
系繊維、ナイロン系繊維維、ポリオレフィン系繊維、レ
ーヨン系繊維、ビニロン系繊維、アクリル系繊維にてフ
リースを形成し、熱、あるいはバインダー樹脂、ニード
ルパンチ、水流等によって結合させた不織布が使用可能
であり、強度と音響透過性の観点からその目付は50〜25
0ｇ/m2が好ましい。これら表面材は、平面状で使用する
とセメント硬化体との接着力が低いことから、エンボス
加工により突起を付与して使用することがよい。突起の
形状、大きさは円形、矩形その他エンボス加工可能な任
意の形状が選べるが、その深さは突起のない部分の吸音
材厚さに対し1/2〜4倍程度が好ましい。The surface material used in the present invention is not limited as long as it can be a sound-permeable surface material.
Preferred examples include those composed of a woven fabric, a porous plate, a perforated film-like substance, or the like. As the perforated film-like substance, various plastic films such as Teflon (registered trademark), polyolefin, polyethylene, polystyrene, and vinyl chloride can be used, and the thickness is preferably 150 to 500 μm from the viewpoint of strength and economy, and The effective aperture ratio is preferably 40% or more from the viewpoint of sound transmission. Examples of the fibers constituting the nonwoven fabric include inorganic fibers such as glass fibers, synthetic fibers such as polyester fibers, and natural fibers such as cotton. Organic fibers are preferable. The organic fiber non-woven fabric was formed by forming a fleece with polyester fiber, nylon fiber, polyolefin fiber, rayon fiber, vinylon fiber, and acrylic fiber, and bonded by heat or binder resin, needle punch, water flow, etc. Non-woven fabric can be used, and the basis weight is 50-25 from the viewpoint of strength and sound transmission
0 g / m 2 is preferred. When these surface materials are used in a flat shape, they have a low adhesive strength to a hardened cement body. Therefore, it is preferable to use projections by embossing. The shape and size of the protrusion can be selected from a circle, a rectangle, and any other shape that can be embossed, but the depth is preferably about 1/2 to 4 times the thickness of the sound absorbing material in the portion without the protrusion.
【０００８】不織布製表面材の製造を例にとって、その
一例を具体的に示すと、まず予め金型を用いて表面材と
なる不織布を凹凸状面を有する板状等の所定形状に成型
する。この際、必要によりバインダー成分等を配合する
ことも表面材の強度を高めるため有利である。成型した
不織布表面材は型枠としての作用も有することができ
る。この表面材はそれ単独で用いてもよいが、成型時の
圧力で変形する恐れがある場合はこれを防ぐ目的で同一
の形状の親型を用意しておくのが好ましい。Taking the manufacture of a nonwoven fabric surface material as an example, one example is specifically shown. First, a nonwoven fabric to be a surface material is molded in advance into a predetermined shape such as a plate having an uneven surface using a mold. At this time, it is also advantageous to add a binder component and the like, if necessary, to increase the strength of the surface material. The molded nonwoven fabric surface material can also function as a mold. This surface material may be used alone, but it is preferable to prepare a master having the same shape in order to prevent deformation due to pressure during molding.
【０００９】本発明に使用する無機質軽量骨材は、天然
の火山レキやシラス又は天然鉱物や廃棄物等を焼成発泡
させた人造軽量骨材が使用可能であり、特に焼成発泡ガ
ラスビーズがその品質の均一性の点から好ましい。粒子
径は０．３〜１．２ｍｍの範囲のものである必要があ
り、上記範囲を外れると吸音性能の低下が生じる。ここ
で、上記粒子系は平均の粒子系を意味するが、上記範囲
に、５０重量％以上、好ましくは８０重量％以上が入る
ことが望ましい。なお、焼成発泡ガラスビーズは、前記
特開平11-22054号公報等で公知である他、特願平10-133
547号等で公知であり、これらが参照される。As the inorganic lightweight aggregate used in the present invention, artificial lightweight aggregate obtained by firing and foaming natural volcanic wreck or shirasu or natural minerals or wastes can be used. It is preferable from the viewpoint of uniformity. The particle diameter needs to be in the range of 0.3 to 1.2 mm, and if it is outside the above range, the sound absorbing performance is reduced. Here, the above-mentioned particle system means an average particle system, and it is desirable that 50% by weight or more, and preferably 80% by weight or more, fall in the above range. Incidentally, fired foamed glass beads are known in the above-mentioned JP-A-11-22054 and the like, and also disclosed in Japanese Patent Application No. 10-133.
No. 547, which are referred to.
【００１０】バインダーとして使用するセメントは各種
ポルトランドセメント、高炉セメント、フライアッシュ
セメント等の混合セメント、アルミナセメント等の各種
水硬性セメント類が使用可能であり、その使用量は無機
質軽量骨材１００重量部に対して３０〜５０重量部が好
ましく、より好ましくは３５〜４５重量部である。過剰
に使用すると吸音性の低下、過少に使用するとハンドリ
ング強度の低下という問題が生じる。Various cements such as Portland cement, blast furnace cement, mixed cement such as fly ash cement, and various types of hydraulic cements such as alumina cement can be used as the binder. Is preferably 30 to 50 parts by weight, more preferably 35 to 45 parts by weight. If used excessively, there is a problem that the sound absorbing property is reduced, and if used too little, the handling strength is lowered.
【００１１】必須成分である無機質軽量骨材以外の骨材
又は充填材は、得られるセメント硬化物強度向上や未硬
化セメント混合物の流動性改善の目的で使用することが
有利である場合があり、硅石粉や、石灰石粉などの天然
鉱物粉末、フライアッシュ、シリカフュームなどの副生
物鉱物粉末、繊維等が使用可能である。繊維は破損時の
靭性を向上させる目的で使用することが有利である場合
があり、鋼繊維、炭素繊維、ビニロン繊維、ガラス繊
維、ポリプロピレン繊維などの短繊維が使用可能であ
る。これらの、無機質軽量骨材以外の骨材又は充填材の
配合量は、無機質軽量骨材の使用量１００重量部に対
し、１００重量部以下、好ましくは５０重量部以下、好
ましくは０〜２０重量部であり、多すぎると軽量性、吸
音性に問題が生じる。Aggregates or fillers other than inorganic lightweight aggregates, which are essential components, may be advantageously used for the purpose of improving the strength of the resulting hardened cement or improving the flowability of the unhardened cement mixture. Natural mineral powders such as silica stone powder and limestone powder, by-product mineral powders such as fly ash and silica fume, and fibers can be used. In some cases, the fiber is advantageously used for the purpose of improving the toughness at the time of breakage, and short fibers such as steel fiber, carbon fiber, vinylon fiber, glass fiber, and polypropylene fiber can be used. The amount of the aggregate or filler other than the inorganic lightweight aggregate is 100 parts by weight or less, preferably 50 parts by weight or less, and preferably 0 to 20 parts by weight, based on 100 parts by weight of the inorganic lightweight aggregate. Part, and if too much, there is a problem in lightness and sound absorption.
【００１２】無機質軽量骨材、セメント、水を必須成分
として含むセメント混合物には、その他セメント混和剤
として知られている各種の添加剤を配合することができ
る。例えば、強度、接着力向上の目的でエチレン酢ビ、
エチレン酢ビ共重合体、アクリル樹脂などの水分散性樹
脂をセメント１００重量部に対して５〜２０重量部程度
配合することができ、また、減水剤、ＡＥ剤（空気連行
剤）として界面活性剤を使用することができる。Various additives known as cement admixtures can be added to the cement mixture containing the inorganic lightweight aggregate, cement and water as essential components. For example, for the purpose of improving strength and adhesion, ethylene vinegar,
About 5 to 20 parts by weight of a water-dispersible resin such as ethylene-vinyl acetate copolymer and acrylic resin can be blended with respect to 100 parts by weight of cement. Agents can be used.
【００１３】無機質軽量骨材、セメント、水を必須成分
として含むセメント混合物は、公知の方法で得ることが
できる。例えば、モルタルミキサーに粒子径０.３〜
１．２ｍｍの無機質軽量骨材１００重量部を投入し、攪
拌しながら水分散性樹脂モルタル接着剤３〜５．５重量
部と必要に応じて空気連行を目的とした界面活性剤を予
め混合した水２０〜３５重量部を注入する。均一に攪拌
した後、セメント３０〜４５重量部を投入する。更に、
均一に混合した後、必要に応じてその他の骨材及び補強
繊維を添加して湿砂状のセメント混合物を得る。The cement mixture containing the inorganic lightweight aggregate, cement and water as essential components can be obtained by a known method. For example, a mortar mixer with a particle size of 0.3 to
100 parts by weight of a 1.2 mm inorganic lightweight aggregate were charged, and 3 to 5.5 parts by weight of a water-dispersible resin mortar adhesive and a surfactant for air entrainment were mixed as required with stirring. 20 to 35 parts by weight of water are injected. After stirring uniformly, 30 to 45 parts by weight of cement are introduced. Furthermore,
After uniform mixing, other aggregates and reinforcing fibers are added as necessary to obtain a wet sand-like cement mixture.
【００１４】本発明の無機質吸音体の製造方法は、格別
な制限はないが、例えば、前記のようにして得られた型
枠内に、前記セメント混合物を充填して表面を平滑に仕
上げる。この際、プレスにてより緻密に成型することも
可能である。その後、適度な温度、湿度で適当な時間養
生するが、その条件はセメントの硬化に不都合を与えな
い範囲で任意に選ぶことができる。硬化終了後は、前記
型枠を取り外すことなく、そのまま無機質吸音体とす
る。この際、必要により切断、穴あけ等の加工や表面処
理等を行うことができる。The method for producing an inorganic sound absorbing body of the present invention is not particularly limited. For example, the mold mixture obtained as described above is filled with the cement mixture to smooth the surface. At this time, it is also possible to mold more densely by pressing. Thereafter, curing is performed at an appropriate temperature and humidity for an appropriate time, and the conditions can be arbitrarily selected within a range that does not cause inconvenience to hardening of the cement. After the curing, the inorganic sound absorbing body is used as it is without removing the mold. At this time, processing such as cutting and drilling, surface treatment, and the like can be performed as necessary.
【００１５】[0015]
【実施例】実施例１ ５０Lのモルタルミキサーに粒子径０.８〜１．２mmの無
機質焼成ガラス発泡体１０kｇを投入し、攪拌しながら
エチレン酢ビ系モルタル接着剤６５０ｇとＡＥ剤１００
倍希釈液を９ｇ予め混合した水３．１kｇを投入し、３
分間均一に攪拌し、次に高炉セメント４．４kｇを投入
し、更に３分間均一に混合してセメント混合物を得た。
このセメント混合物を長さ５００mm、幅５００ｍｍで深
さ10ｍｍの突起を設けた総深さ２０ｍｍの箱状に成型し
た目付け２００ｇ/m2のポリエステル製不織布の表面材
を型枠として成型した。その後、４０℃、相対湿度９５
％の条件で５日間養生して比重０．６２、長さ５００ｍ
ｍ、幅５００ｍｍ、総厚さ２０ｍｍの吸音体を得た。EXAMPLE 1 10 kg of an inorganic fired glass foam having a particle diameter of 0.8 to 1.2 mm was charged into a 50 L mortar mixer, and 650 g of an ethylene vinyl acetate-based mortar adhesive and AE agent 100 were stirred.
3.1 kg of water previously mixed with 9 g of the double dilution was added, and 3
Then, 4.4 kg of blast furnace cement was added, and the mixture was further uniformly mixed for 3 minutes to obtain a cement mixture.
The cement mixture a length 500mm, were molded surface material of the polyester nonwoven fabric of basis weight 200 g / m 2, which was molded in a box shape of the total depth 20mm provided with protrusions having a depth of 10mm in width 500mm as formwork. Thereafter, at 40 ° C. and a relative humidity of 95
Cured under conditions of 5% for 5 days, specific gravity 0.62, length 500m
m, a width of 500 mm, and a total thickness of 20 mm were obtained.
【００１６】実施例２ 実施例１と同様にして得られたセメント混合物を、長さ
５００ｍｍ、幅５００ｍｍで深さ２０ｍｍの鋼製型枠に
て成型した。その後４０℃、相対湿度９５％の条件で５
日間養生した後、鋼製型枠から脱型して比重０．６０、
長さ５００ｍｍ、幅５００ｍｍ、厚さ２０ｍｍの吸音体
を得た。Example 2 A cement mixture obtained in the same manner as in Example 1 was molded in a steel mold having a length of 500 mm, a width of 500 mm and a depth of 20 mm. Then, at 40 ° C and 95% relative humidity, 5
After curing for days, the mold was removed from the steel mold and the specific gravity was 0.60.
A sound absorber having a length of 500 mm, a width of 500 mm, and a thickness of 20 mm was obtained.
【００１７】実施例３ 実施例１と同様にして得られたセメント混合物にポリプ
ロピレン短繊維を、８７ｇ添加してさらに３分間混合
し、ポリプロピレン短繊維配合セメント混合物を得た。
このポリプロピレン短繊維配合セメント混合物を、長さ
５００ｍｍ、幅５００ｍｍで深さ２０ｍｍの鋼製型枠に
て成型した。その後、４０℃、相対湿度９５％の条件で
５日間養生した後、鋼製型枠から脱型して比重０．５
９、長さ５００ｍｍ、幅５００ｍｍ、厚さ２０ｍｍの吸
音体を得た。Example 3 87 g of polypropylene short fibers were added to the cement mixture obtained in the same manner as in Example 1, and the mixture was further mixed for 3 minutes to obtain a cement mixture containing short polypropylene fibers.
This polypropylene short fiber-containing cement mixture was molded in a steel mold having a length of 500 mm, a width of 500 mm and a depth of 20 mm. Then, after curing for 5 days at 40 ° C. and a relative humidity of 95%, the mold was removed from the steel mold and the specific gravity was 0.5.
9. A sound absorber having a length of 500 mm, a width of 500 mm and a thickness of 20 mm was obtained.
【００１８】上記実施例１〜３で得られた吸音体につい
て、曲げ強度、曲げ弾性率、吸水後の曲げ強度測定、吸
音率の測定及び衝撃試験を行った。結果を表１及び表２
に示す。吸音率の測定条件を次に示す。The sound absorbing bodies obtained in Examples 1 to 3 were subjected to bending strength, bending elastic modulus, bending strength measurement after water absorption, sound absorption measurement, and impact test. Tables 1 and 2 show the results.
Shown in The measurement conditions of the sound absorption coefficient are shown below.
【００１９】[吸音率測定方法]：ＪＩＳ Ａ１４０５
「管内法による建築材料の垂直入射吸音率測定方法」に
基づき周数２５０〜２０００Hzで背後空気層５０ｍｍの
場合の垂直入射吸音率を測定した。なお、実施例1の吸
音体について、吸音体の二辺を固定支持し、重さ５００
ｇのナス型錘を５０cm高さから落下させ、吸音体の破壊
状況を観察したところ、曲げ破壊は生じるが、破片の分
離、飛散は全く認められなかった。[Method of measuring sound absorption coefficient]: JIS A1405
The normal incidence sound absorption coefficient was measured in the case of a frequency of 250 to 2000 Hz and a back air layer of 50 mm based on the "method of measuring the normal incidence sound absorption coefficient of a building material by the in-pipe method". The sound absorber of Example 1 was fixedly supported on two sides of the sound absorber, and weighed 500%.
g of the eggplant-shaped weight was dropped from a height of 50 cm, and the state of destruction of the sound absorber was observed. As a result, bending destruction occurred, but no separation or scattering of fragments was observed.
【００２０】[0020]
【表１】 [Table 1]
【００２１】[0021]
【表２】 [Table 2]
【００２２】[0022]
【発明の効果】本発明によれば、軽量、高強度、かつ耐
衝撃性に優れた吸音体を得ることができる。また、表面
材を設け、これを型枠とする場合は、高価な金型を多く
用意する必要が無く、脱型や型枠手入れの手間が省略で
きるため、少ない投資で効率よく軽量、高強度、かつ耐
衝撃性に優れた吸音体を得ることができる。According to the present invention, a sound absorber having a light weight, high strength, and excellent impact resistance can be obtained. In addition, when a surface material is provided and used as a mold, it is not necessary to prepare many expensive molds, and the labor of removing the mold and maintaining the mold can be omitted, so that the light weight and high strength can be efficiently achieved with a small investment. In addition, a sound absorber having excellent impact resistance can be obtained.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｅ０１Ｆ 8/00 Ｃ０４Ｂ 14:04 Ａ 8/02 14:24 //(Ｃ０４Ｂ 28/02 18:16 14:04 16:06 Ｚ 14:24 111:52 18:16 Ｅ０１Ｆ 8/00 16:06） 111:52 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) E01F 8/00 C04B 14:04 A 8/02 14:24 // (C04B 28/02 18:16 14: 04 16:06 Z 14:24 111: 52 18:16 E01F 8/00 16:06) 111: 52
Claims (5)
mの無機質軽量骨材１００重量部を３５〜４５重量部の
セメントで硬化させてなる吸音体。[1] A particle diameter of 0.3 to 1.2 m as a main aggregate
A sound absorber obtained by curing 100 parts by weight of an inorganic lightweight aggregate of m with 35 to 45 parts by weight of cement.
し焼成発泡させたものである請求項１記載の吸音体。2. The sound absorber according to claim 1, wherein the inorganic lightweight aggregate is obtained by firing and foaming a waste glass material as a raw material.
mの無機質軽量骨材をセメントで硬化させた硬化物と、
エンボス加工により突起を付与した補強材を兼ねた音響
透過性の表面材とによって構成された吸音体。3. The main aggregate has a particle diameter of 0.3 to 1.2 m.
A cured product obtained by curing inorganic lightweight aggregate of m with cement,
A sound absorber composed of a sound-transmitting surface material that also serves as a reinforcing material provided with projections by embossing.
ｍの無機質軽量骨材とセメントと水を、音響透過性の表
面材を設置した型内にて成型、硬化させ、表面材と一体
化させることを特徴とした吸音体の製造方法。4. A particle diameter of 0.3 to 1.2 m as a main aggregate.
A method for producing a sound absorbing body, comprising: molding, curing, and integrating an inorganic lightweight aggregate of m, cement, and water in a mold provided with a sound-permeable surface material, and integrating with the surface material.
から選択される１種以上の骨材又は充填材を無機質軽量
骨材に対して等量以下配合する請求項4記載の吸音体の
製造方法。5. The sound absorbing body according to claim 4, wherein one or more types of aggregates or fillers selected from other aggregates and fibers are mixed with the inorganic lightweight aggregate in an equal amount or less with the inorganic lightweight aggregate. Production method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001137125A JP2002326880A (en) | 2001-05-08 | 2001-05-08 | Inorganic sound absorber and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001137125A JP2002326880A (en) | 2001-05-08 | 2001-05-08 | Inorganic sound absorber and its manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002326880A true JP2002326880A (en) | 2002-11-12 |
Family
ID=18984278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001137125A Pending JP2002326880A (en) | 2001-05-08 | 2001-05-08 | Inorganic sound absorber and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002326880A (en) |
-
2001
- 2001-05-08 JP JP2001137125A patent/JP2002326880A/en active Pending
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