JPH0622982B2 - Cement molding - Google Patents
Cement moldingInfo
- Publication number
- JPH0622982B2 JPH0622982B2 JP4221187A JP4221187A JPH0622982B2 JP H0622982 B2 JPH0622982 B2 JP H0622982B2 JP 4221187 A JP4221187 A JP 4221187A JP 4221187 A JP4221187 A JP 4221187A JP H0622982 B2 JPH0622982 B2 JP H0622982B2
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- Prior art keywords
- molded product
- cement
- fiber
- cement molded
- weight
- 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.)
- Expired - Lifetime
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Description
【発明の詳細な説明】 （産業上の利用分野） 本発明はセメント成形体，特に，住宅のベランダやバル
コニーなどの床を構成するデッキ材として用いられるセ
メント成形体に関する。Description: TECHNICAL FIELD The present invention relates to a cement molded product, and more particularly to a cement molded product used as a deck material constituting a floor of a balcony or a balcony of a house.
（従来の技術） 住宅のベランダやバルコニーなどの床を構成するデッキ
材には，近年，木製スノコに代わりプラスチック製のデ
ッキ材が使用されている。しかし，プラスチックは，軽
量ではあるものの，可燃性である。従って，防火性能が
要求される住宅デッキ材には好ましくない。(Prior Art) In recent years, plastic deck materials have been used instead of wooden slats for the deck materials that make up the floors of balconies and balconies of houses. However, although lightweight, plastic is flammable. Therefore, it is not suitable for housing deck materials that require fireproof performance.
防火性を有する材料として，石綿繊維を補強材とした材
料（例えば，石綿セメント板，石綿ケイカル板など）が
提案されている。しかし，この材料は，靭性に欠けるた
め，耐荷重性は高いものの，耐衝撃性に欠ける。衝撃荷
重に対して容易に分断，破壊する。しかも，石綿は発ガ
ン物質として知られており，この材料は人体に対して有
害である。As a material having fire resistance, a material having asbestos fibers as a reinforcing material (for example, asbestos cement board, asbestos silica board, etc.) has been proposed. However, since this material lacks toughness, it has high load-bearing capacity, but lacks impact resistance. Easily split and break under impact load. Moreover, asbestos is known as a carcinogen, and this material is harmful to the human body.
（発明が解決しようとする問題点） 本発明は，上記従来の問題点を解決するものであり，そ
の目的とするところは，軽量にして耐衝撃性に優れたセ
メント成形体を提供することにある。本発明の他の目的
は，人体に有害でないセメント成形体を提供することに
ある。(Problems to be Solved by the Invention) The present invention is to solve the above-mentioned conventional problems, and an object thereof is to provide a cement compact which is lightweight and has excellent impact resistance. is there. Another object of the present invention is to provide a cement molded product that is not harmful to the human body.
（問題点を解決するための手段） 本発明のセメント成形体は，上層が無機軽量骨材を含有
し，かつ下層が強化繊維を含有するセメント成形体であ
って，該上層と該下層の間に繊維メッシュ材を配置して
なり，そのことにより上記目的が達成される。(Means for Solving Problems) The cement molded product of the present invention is a cement molded product in which an upper layer contains an inorganic lightweight aggregate and a lower layer contains a reinforcing fiber, and between the upper layer and the lower layer. The fiber mesh material is arranged on the inner surface of the fiber, thereby achieving the above object.
上層の層厚は，下層の層厚に対し，３〜10倍，好ましく
は３〜７倍に設定される。３倍を下まわると，セメント
成形体の軽量化が充分達成しにくい。10倍を上まわる
と，所望の耐衝撃性が充分得られにくい。上層の比重は
0.5〜 1.5の範囲が好ましい。 0.5を下まわると，得ら
れたセメント成形体の耐衝撃性が低下する。 1.5を上ま
わると，セメント成形体の軽量化が達成されない。The layer thickness of the upper layer is set to 3 to 10 times, preferably 3 to 7 times the layer thickness of the lower layer. If it is less than 3 times, it is difficult to sufficiently reduce the weight of the cement compact. If it exceeds 10 times, it is difficult to obtain the desired impact resistance. The specific gravity of the upper layer
The range of 0.5 to 1.5 is preferred. When it is less than 0.5, the impact resistance of the obtained cement molded product decreases. If it exceeds 1.5, the weight reduction of the cement compact cannot be achieved.
上層は，セメント（ポルトランドセメント）および無機
軽量骨材を主体とする。上層に含有される無機軽量骨材
には，独立多孔性の軽量粒体が用いられる。この軽量粒
体は，シラス（火山灰），抗火石，黒曜石，真珠岩など
の天然ガラス質鉱物を，1000〜1200℃にて焼成発泡させ
ることにより得られる。この軽量粒体は，粒中に微小セ
ルを形成しており，例えば，シラスから得られるシラス
バルーン，抗火石から得られるネオライト（新島物産社
製），黒曜石や真珠岩から得られる吸水率 100％以下の
パーライトがある。この無機軽量骨材の比重は 0.7以
下，そして最大粒径は，得られるセメント成形体の厚さ
の 1/3を越えない長さとされる。この無機軽量骨材は，
好ましくは，平均粒径 100μｍ以下の微粒骨材および平
均粒径 300μｍ以上の粗骨材を含有する。無機軽量骨材
は，セメント 100重量部に対し，５〜 500重量部，好ま
しくは10〜 100重量部の範囲で含有される。５重量部を
下まわると，セメント成形体の所望の軽量性や耐衝撃性
が得にくい。 500重量部を上まわると，セメント中への
骨材の分散が困難となるために，得られたセメント成形
体の耐衝撃性がかえって低下しやすい。The upper layer is mainly composed of cement (Portland cement) and inorganic lightweight aggregate. As the inorganic lightweight aggregate contained in the upper layer, lightweight particles having independent porosity are used. These lightweight granules are obtained by firing and foaming natural glassy minerals such as shirasu (volcanic ash), anti-firestone, obsidian, and pearlite at 1000-1200 ℃. These lightweight granules form microcells in the granules. For example, shirasu balloon obtained from shirasu, neolite (manufactured by Niijima Bussan) obtained from anti-firestone, 100% water absorption obtained from obsidian and pearlite. There are the following perlites. The specific gravity of this inorganic lightweight aggregate is 0.7 or less, and the maximum particle size is a length that does not exceed 1/3 of the thickness of the obtained cement compact. This inorganic lightweight aggregate is
Preferably, it contains fine aggregate having an average particle size of 100 μm or less and coarse aggregate having an average particle size of 300 μm or more. The inorganic lightweight aggregate is contained in an amount of 5 to 500 parts by weight, preferably 10 to 100 parts by weight, based on 100 parts by weight of cement. If it is less than 5 parts by weight, it is difficult to obtain the desired lightweightness and impact resistance of the cement molded product. When the amount exceeds 500 parts by weight, it becomes difficult to disperse the aggregate in the cement, so that the impact resistance of the obtained cement molded product is rather lowered.
上層には，セメント（ポルトランドセメント），無機軽
量骨材のほかに，水および，必要に応じて，添加剤が含
有される。さらに，有機繊維を配合すれば，耐衝撃性が
向上する。水の量は無機軽量骨材の配合量に応じて調整
され，通常，セメント100重量部に体し，40〜 200重量
部，好ましくは50〜 100重量部である。添加剤として
は，骨材の分散補助剤や流動性改善剤としてメチルセル
ロースなどが用いられ，セメント 100重量部に対し，0.
02〜２重量部が配合される。有機繊維には，例えば，ビ
ニロン繊維，ポリプロピレン繊維，ポリエチレン繊維，
ナイロン繊維などの合成繊維やパルプ繊維が用いられ
る。有機繊維の上層のセメント成形体中での配合量は，
2.0重量％以下，好ましくは 0.5〜 1.5重量％の範囲と
される。 2.0重量％を上まわると，有機繊維の弾性が大
きくなるため，セメント成形体の製造において，脱水プ
レス成形の脱型時に成形体が崩壊するおそれがある。有
機繊維の形状には，径が30μｍ以下のモノフィラメント
を長さ20mm以下にカットしたタイプ，またはフィラメン
トを集束して得られる，繊維長３〜20mmのチョップスト
ランドがある。長さが20mmを上まわると，上層と下層の
界面における強度が低下し，そのために，得られたセメ
ント成形体の強度が低くなりやすい。長さが３mmを下ま
わると，これら繊維を含有させても，所望の耐衝撃性の
向上が得にくい。繊維長は15mm以下がより好ましい。In the upper layer, in addition to cement (Portland cement) and inorganic lightweight aggregate, water and, if necessary, additives are contained. Furthermore, impact resistance is improved by adding organic fibers. The amount of water is adjusted according to the content of the inorganic lightweight aggregate, and is usually 40 to 200 parts by weight, preferably 50 to 100 parts by weight, based on 100 parts by weight of cement. As an additive, methyl cellulose, etc. is used as a dispersion aid for aggregates and a fluidity improver.
02 to 2 parts by weight are blended. Organic fibers include, for example, vinylon fiber, polypropylene fiber, polyethylene fiber,
Synthetic fibers such as nylon fibers and pulp fibers are used. The compounding amount of the upper layer of the organic fiber in the cement molding is
It is set to 2.0% by weight or less, preferably 0.5 to 1.5% by weight. If it exceeds 2.0% by weight, the elasticity of the organic fiber becomes large, so that in the production of cement compacts, the compacts may collapse during demolding of dehydration press molding. The shape of the organic fiber includes a type in which a monofilament having a diameter of 30 μm or less is cut into a length of 20 mm or less, or a chopped strand having a fiber length of 3 to 20 mm obtained by bundling filaments. When the length exceeds 20 mm, the strength at the interface between the upper layer and the lower layer decreases, and therefore the strength of the obtained cement compact tends to decrease. If the length is less than 3 mm, it is difficult to obtain the desired improvement in impact resistance even if these fibers are contained. The fiber length is more preferably 15 mm or less.
下層は，セメント（ポルトランドセメント）および強化
繊維を主体とする。下層に含有される強化繊維には，引
張り弾性率が3000kg／mm２以上の繊維が用いられ，例え
ば，アラミド繊維，ビニロン繊維，カーボン繊維があ
る。強化繊維は下層のセメント成形体中において，６重
量％以下，好ましくは５重量％以下の割合で含有され
る。６重量％を上まわると，セメント中への強化繊維の
分散が困難となるために，得られたセメント成形体の耐
衝撃性がかえって低下しやすい。強化繊維の形状は，径
30μｍ以下のフィラメントを 500本以上集束したストラ
ンドを，さらに３〜15mmの長さにカットしたチョップス
トランドとされる。The lower layer is mainly composed of cement (Portland cement) and reinforcing fibers. As the reinforcing fibers contained in the lower layer, fibers having a tensile elastic modulus of 3000 kg / mm 2 or more are used, and examples thereof include aramid fibers, vinylon fibers, and carbon fibers. The reinforcing fiber is contained in the lower cement molded product in an amount of 6% by weight or less, preferably 5% by weight or less. When it exceeds 6% by weight, it becomes difficult to disperse the reinforcing fiber in the cement, and hence the impact resistance of the obtained cement molded product is rather lowered. The shape of the reinforcing fiber is the diameter
A strand of 500 or more filaments of 30 μm or less is further cut into a length of 3 to 15 mm to form a chopped strand.
下層にも，セメント（ポルトランドセメント），強化繊
維のほかに，砂，フライアッシュなどの骨材，水および
添加剤が含有される。In the lower layer, in addition to cement (Portland cement) and reinforcing fibers, sand, aggregate such as fly ash, water, and additives are contained.
砂，フライアッシュなどの骨材は，必要に応じて用いら
れ，セメント 100重量部に対し， 100重量部以下，好ま
しくは60重量部以下の範囲で含有される。 100重量部を
上まわると，得られたセメント成形体の強度が低下しや
すい。水の量は強化繊維の配合量に応じて調整され，通
常，セメント 100重量部に対し，30〜 100重量部，好ま
しくは40〜70重量部である。添加剤としては，骨材の分
散補助剤や成形時の流動性改善剤としてメチルセルロー
ス，ヒドロキシメチルセルロースなどのセルロース誘導
体などが用いられ，セメント 100重量部に対し， 0.1〜
２重量部が配合される。Aggregates such as sand and fly ash are used as needed and are contained in an amount of 100 parts by weight or less, preferably 60 parts by weight or less, relative to 100 parts by weight of cement. If it exceeds 100 parts by weight, the strength of the obtained cement molded product tends to decrease. The amount of water is adjusted according to the blending amount of the reinforcing fiber, and is usually 30 to 100 parts by weight, preferably 40 to 70 parts by weight, relative to 100 parts by weight of cement. As an additive, a dispersion aid for aggregates or a cellulose derivative such as methyl cellulose or hydroxymethyl cellulose is used as a fluidity improver at the time of molding.
2 parts by weight are compounded.
繊維メッシュ材は，上層と下層の界面に配置され，得ら
れたセメント成形体の強度，耐衝撃性を向上させるため
に用いられる。この繊維メッシュ材は，アラミド繊維，
ビニロン繊維，カーボン繊維などの強化繊維を径20μｍ
以下のフィラメントとし，これを集束してストランドを
形成した後，さらにストランド同士を縦横に交差し交差
部を接着または融着させて得られる。この繊維メッシュ
材の目開きは，３〜30mm，好ましくは５〜15mmの範囲と
される。３mmを下まわると，上層と下層とが繊維メッシ
ュ材により遮断され，充分な層間強度が得られない。30
mmを上まわると，繊維メッシュ材による耐衝撃性の向上
がなされない。The fiber mesh material is arranged at the interface between the upper layer and the lower layer, and is used to improve the strength and impact resistance of the obtained cement molded product. This fiber mesh material is aramid fiber,
Diameter of reinforcing fiber such as vinylon fiber and carbon fiber 20μm
The following filaments are bundled to form a strand, and then the strands are crossed vertically and horizontally, and the crossing portion is bonded or fused. The mesh size of this fiber mesh material is in the range of 3 to 30 mm, preferably 5 to 15 mm. Below 3 mm, the upper and lower layers are blocked by the fiber mesh material, and sufficient interlayer strength cannot be obtained. 30
If it exceeds mm, the impact resistance cannot be improved by the fiber mesh material.
本発明のセメント成形体は，例えば，第１図に示すよう
に，無機軽量骨材を含有する上層１，強化繊維を含有す
る下層２，および上層１と下層２の間に配置された繊維
メッシュ材３から構成される。上層１，下層２および繊
維メッシュ材３は，排水用細孔を有する金型にて一体的
に形成される。The cement molded product of the present invention is, for example, as shown in FIG. 1, an upper layer 1 containing an inorganic lightweight aggregate, a lower layer 2 containing reinforcing fibers, and a fiber mesh arranged between the upper layer 1 and the lower layer 2. Composed of material 3. The upper layer 1, the lower layer 2 and the fiber mesh material 3 are integrally formed by a mold having drainage pores.
本発明のセメント成形体は，脱水プレス成形により得ら
れる。脱水プレス成形では，基本的には下型と上型の２
つの部分からなる金型，また，下型と上型および側面部
を形成する枠状の側面型の３点式の金型等が用いられ
る。下型および上型のいずれか一方の型面には無数の排
水用細孔が設けられている。この細孔により，成形時に
おいて，余剰の水が系外に排出される。この場合，細孔
を真空ポンプに接続し，金型内を減圧状態とすれば，水
の排出が促進される。上層および下層を形成するための
材料が，両層間に配置された繊維メッシュ材とともに金
型内に充填され，真空ポンプ等で水を排出しつつ加圧さ
れる。こうすることにより，上層と下層の界面で，この
界面を横切る水の流れを生ぜしめ，水と同時にセメント
成分等が流動し，この界面での上層と下層との繊維メッ
シュ材を介した接着性が向上する。例えば，下層側の金
型面に脱水用の細孔がある場合は，上層側の材料中に含
まれる余剰の水や空気は，加圧圧縮と同時に，上層と下
層の界面を横切って，この細孔より排出される。こうし
て，上層・下層の材料中に含まれる余剰の水や空気は，
圧縮と同時に排出され，圧密化され成形される。この結
果，上層と下層の界面では，その一方もしくは両方に多
量の強化繊維を含み，かつ上層には軽量骨材を含む配合
の異なる材料系が別々に供給された構成にも拘わらず，
上述の如く，界面を横切って移動する余剰水と同時にセ
メント成分等のために，界面での繊維メッシュ材を介し
た接着一体化が達成される。プレス圧力は20〜 100kg／
cm2，好ましくは30〜70kg／cm2とされる。20kg／cm2を
下まわると，得られたセメント成形体の圧密化が不充分
になり，強度が低下しやすい。 100kg／cm2を上まわる
と，上層の無機軽量骨材が破壊され，そのために，所望
の軽量化が達成しにくい。しかも，無機軽量骨材による
歩行時の足音の低減が得られにくい。The cement molded product of the present invention is obtained by dehydration press molding. In dewatering press molding, there are basically 2 types of lower mold and upper mold.
A mold including three parts, or a three-point mold including a lower mold, an upper mold, and a frame-shaped side mold that forms a side surface is used. Numerous drainage pores are provided on the mold surface of either the lower mold or the upper mold. Due to these pores, excess water is discharged out of the system during molding. In this case, the discharge of water is promoted by connecting the pores to a vacuum pump and reducing the pressure inside the mold. The material for forming the upper layer and the lower layer is filled in a mold together with the fiber mesh material arranged between both layers, and pressurized while discharging water by a vacuum pump or the like. As a result, at the interface between the upper layer and the lower layer, a flow of water across the interface is generated, and the cement components and the like flow at the same time as the water, and the adhesiveness between the upper layer and the lower layer at this interface via the fiber mesh material. Is improved. For example, when there are pores for dehydration on the mold surface on the lower layer side, excess water and air contained in the material on the upper layer side crosses the interface between the upper layer and the lower layer simultaneously with pressure compression, and It is discharged from the pores. In this way, the excess water and air contained in the materials of the upper and lower layers are
It is discharged at the same time as compression, consolidated and molded. As a result, at the interface between the upper layer and the lower layer, in spite of the constitution in which one or both of them contains a large amount of reinforcing fibers, and the upper layer is supplied with different material systems of different compositions including lightweight aggregate,
As described above, due to the cement components and the like as well as the surplus water moving across the interface, adhesive integration through the fiber mesh material at the interface is achieved. Press pressure is 20-100kg /
It is set to cm 2 , preferably 30 to 70 kg / cm 2 . If it is less than 20 kg / cm 2 , consolidation of the obtained cement molded product will be insufficient and the strength will tend to decrease. Above 100 kg / cm 2 , the inorganic lightweight aggregate in the upper layer is destroyed, which makes it difficult to achieve the desired weight reduction. Moreover, it is difficult to reduce footsteps during walking by using the inorganic lightweight aggregate.
（実施例） 以下に本発明を実施例について述べる。(Examples) The present invention will be described below with reference to Examples.
実施例１ (A)成形体の調製 上層，下層および繊維メッシュ材の材料として以下の物
質を用いた。金型としては，以下の形状の型を用いた。Example 1 (A) Preparation of molded body The following substances were used as materials for the upper layer, the lower layer and the fiber mesh material. The mold used had the following shape.
(1)上層 ポルトランドセメント 100重量部 フライアッシュ 40重量部 シラスバルーン（比重 0.2，平均粒径50μｍ） 10重量部 メチルセルロース 0.2重量部 水 60重量部 (2)下層 ポルトランドセメント 100重量部 フライアッシュ 20重量部 アラミド繊維（テクノーラHM-50,長さ６mm，引張り弾性
率 7,100kg／mm２，テイジン社製，下層のセメント成形
体重量の1.2 重量％） ２重量部 メチルセルロース 0.2重量部 水 45重量部 (3)繊維メッシュ材 ビニロン アドヒーブＶ−1810（クラレ社製） 繊維径 14.2μｍ （１．８ｄ） 集束数 1000本（1800ｄ） 縦横の目開き 10mm（1800ｄ×1800ｄ） 目付け 40ｇ／m2 (4)金型 300mm× 300mmの成形体が得られるように加工されてい
る。上型と下型の２つの部分からなり，下型には，５mm
×５mmに１個の割合で直径 1.2mmの排水用細孔が設けら
れている。下型の表面には濾過布が貼着されている。(1) Upper layer Portland cement 100 parts by weight Fly ash 40 parts by weight Shirasu balloon (specific gravity 0.2, average particle size 50 μm) 10 parts by weight Methyl cellulose 0.2 parts by weight Water 60 parts by weight (2) Lower layer portland cement 100 parts by weight Fly ash 20 parts by weight Aramid fiber (Technora HM-50, length 6 mm, tensile modulus 7,100 kg / mm 2 , Teijin Co., 1.2 wt% of the weight of the lower cement molding) 2 parts by weight methyl cellulose 0.2 parts by weight water 45 parts by weight (3) Fiber mesh material Vinylon Adhesive V-1810 (manufactured by Kuraray Co., Ltd.) Fiber diameter 14.2 μm (1.8d) Convergence number 1000 (1800d) Vertical and horizontal openings 10mm (1800d x 1800d) Weight 40g / m 2 (4) Mold 300mm It is processed so as to obtain a molded body of × 300 mm. It consists of two parts, an upper mold and a lower mold, and the lower mold has 5 mm
Drainage pores having a diameter of 1.2 mm are provided at a rate of 1 per 5 mm. A filter cloth is attached to the surface of the lower mold.
上層用の材料をオムニキサーで約５分間混合した。この
混合物約 1.8kgを金型の下型に供給した。20kg／cm2の
圧力でプレス成形した後，金型を開いたところ，成形体
は上型に付着していた。次いで，下層用の材料をオムニ
ミキサーで混合した。この混合物約 1.0kgを金型の下型
に供給し，その上に繊維メッシュ材（ビニロン アドヒ
ーブＶ−1810）を配置した後，上記成形体とともに，50
kg／cm2の圧力で60秒間脱水プレス成形した。成形時の
減圧度は約 700mmHgであった。得られたセメント成形体
を，水蒸気雰囲気下，60℃で24時間一次養生した後，さ
らに常温で30日間養生した。成形体の重量は約2.52kgで
あり，比重は 1.4であった。また，成形体の下層の層厚
は約５mm，そして上層の層厚は約15mmであった。The materials for the upper layer were mixed on an omnixer for about 5 minutes. About 1.8 kg of this mixture was fed to the lower mold of the mold. After press molding with a pressure of 20 kg / cm 2 , when the mold was opened, the compact adhered to the upper mold. The materials for the lower layer were then mixed with an omni mixer. About 1.0 kg of this mixture was supplied to the lower mold of the mold, and a fiber mesh material (Vinylon Adhesive V-1810) was placed on the lower mold.
Dewatering press molding was performed for 60 seconds at a pressure of kg / cm 2 . The degree of vacuum at the time of molding was about 700 mmHg. The obtained cement compact was subjected to primary curing at 60 ° C for 24 hours in a steam atmosphere, and then at room temperature for 30 days. The weight of the compact was about 2.52 kg and the specific gravity was 1.4. The lower layer of the molded body had a thickness of about 5 mm, and the upper layer had a thickness of about 15 mm.
(B)成形体の評価 (A)で得られたセメント成形体を，スパン間隔 2.5mmの
鋼製根太上に水平に配置し，２ｍの高さから１kgの鋼球
を落下させて破壊状態を観察した。また，このセメント
成形体（ 300mm× 300mm）を巾40mmに切断し，スパン間
隔 200mmにて曲げ破壊テストを行って曲げ強度を求め
た。その結果，落球試験ではセメント成形体には異常が
認められなかった。曲げ強度は 200kg／cm2であった。
これらの結果を下表に示す。(B) Evaluation of molded body The cement molded body obtained in (A) is placed horizontally on a steel joist with a span interval of 2.5 mm, and a 1 kg steel ball is dropped from a height of 2 m to break it. I observed. In addition, this cement compact (300 mm × 300 mm) was cut into a width of 40 mm, and a bending fracture test was conducted at a span interval of 200 mm to determine the bending strength. As a result, no abnormalities were found in the cement compact in the falling ball test. The bending strength was 200 kg / cm 2 .
The results are shown in the table below.
実施例２ アラミド繊維に代えてカーボン繊維（ PAN系，径９μ
ｍ，長さ12mm，東邦レーヨン社製）を用いたこと以外
は，実施例１と同様にしてセメント成形体を作製した。
セメント成形体の全体の厚さは20mmであり，上層の層厚
は15mmであった。成形体の重量は2.52kgであり，比重は
1.4であった。このセメント成形体を実施例１と同様の
方法により評価したところ，落球試験では異常がなく，
曲げ強度は 195kg／cm2であった。これらの結果を下表
に示す。Example 2 Instead of aramid fiber, carbon fiber (PAN type, diameter 9μ
m, length 12 mm, manufactured by Toho Rayon Co., Ltd.) A cement molded product was produced in the same manner as in Example 1.
The total thickness of the cement compact was 20 mm and the thickness of the upper layer was 15 mm. The weight of the molded body is 2.52 kg, and the specific gravity is
It was 1.4. When this cement compact was evaluated by the same method as in Example 1, there was no abnormality in the falling ball test,
The bending strength was 195 kg / cm 2 . The results are shown in the table below.
実施例３ アラミド繊維に代えてビニロン繊維（径14.2μｍ，長さ
６mm，クラレ社製）を用いたこと以外は，実施例１と同
様にしてセメント成形体を作製した。セメント成形体の
全体の厚さは20mmであり，上層の層厚は15mmであった。
成形体の重量は2.52kgであり，比重は 1.4であった。こ
のセメント成形体を実施例１と同様の方法により評価し
たところ，落球試験では異常がなく，曲げ強度は 160kg
／cm2であった。これらの結果を下表に示す。Example 3 A cement molded product was produced in the same manner as in Example 1 except that vinylon fibers (diameter 14.2 μm, length 6 mm, manufactured by Kuraray Co., Ltd.) were used instead of the aramid fibers. The total thickness of the cement compact was 20 mm and the thickness of the upper layer was 15 mm.
The weight of the compact was 2.52 kg and the specific gravity was 1.4. When this cement compact was evaluated by the same method as in Example 1, there was no abnormality in the falling ball test, and the bending strength was 160 kg.
It was / cm 2 . The results are shown in the table below.
実施例４ 繊維メッシュ材として，ビニロンＶ−1800−２（ユニチ
カ社製）を用いたこと以外は，実施例１と同様にしてセ
メント成形体を作製した。セメント成形体の全体の厚さ
は20mmであり，上層の層厚は15mmであった。成形体の重
量は2.52kgであり，比重は 1.4であった。このセメント
成形体を実施例１と同様の方法により評価したところ，
落球試験では異常がなく，曲げ強度は 165kg／cm2であ
った。これらの結果を下表に示す。Example 4 A cement molded product was produced in the same manner as in Example 1 except that vinylon V-1800-2 (manufactured by Unitika Ltd.) was used as the fiber mesh material. The total thickness of the cement compact was 20 mm and the thickness of the upper layer was 15 mm. The weight of the compact was 2.52 kg and the specific gravity was 1.4. When this cement compact was evaluated by the same method as in Example 1,
There was no abnormality in the ball drop test, and the bending strength was 165 kg / cm 2 . The results are shown in the table below.
実施例５ 繊維メッシュ材として，アラミドメッシュ材HM−1010
（テイジン社製）を用いたこと以外は，実施例１と同様
にしてセメント成形体を作製した。セメント成形体の全
体の厚さは20mmであり，上層の層厚は15mmであった。成
形体の重量は2.52kgであり，比重は 1.4であった。この
セメント成形体を実施例１と同様の方法により評価した
ところ，落球試験では異常がなく，曲げ強度は 180kg／
cm2であった。これらの結果を下表に示す。Example 5 As a fiber mesh material, an aramid mesh material HM-1010
A cement molded product was produced in the same manner as in Example 1 except that (made by Teijin) was used. The total thickness of the cement compact was 20 mm and the thickness of the upper layer was 15 mm. The weight of the compact was 2.52 kg and the specific gravity was 1.4. When this cement compact was evaluated by the same method as in Example 1, there was no abnormality in the falling ball test, and the bending strength was 180 kg /
It was cm 2 . The results are shown in the table below.
実施例６ 繊維メッシュ材として， PAN系カーボンメッシュ材Ｃ−
1010（クラボウ社製）を用いたこと以外は，実施例１と
同様にしてセメント成形体を作製した。セメント成形体
の全体の厚さは20mmであり，上層の層厚は15mmであっ
た。成形体の重量は2.52kgであり，比重は 1.4であっ
た。このセメント成形体を実施例１と同様の方法により
評価したところ，落球試験では異常がなく，曲げ強度は
180kg／cm2であった。これらの結果を下表に示す。Example 6 As a fiber mesh material, a PAN-based carbon mesh material C-
A cement molded product was produced in the same manner as in Example 1 except that 1010 (produced by Kurabo Industries) was used. The total thickness of the cement compact was 20 mm and the thickness of the upper layer was 15 mm. The weight of the compact was 2.52 kg and the specific gravity was 1.4. When this cement compact was evaluated by the same method as in Example 1, there was no abnormality in the falling ball test, and the bending strength was
It was 180 kg / cm 2 . The results are shown in the table below.
実施例７ 繊維メッシュ材としてアラミドメッシュ材HM−1010（テ
イジン社製）を用い，無機軽量骨材として，平均粒径40
μｍのシラスバルーンに代えて，平均粒径50μｍのシラ
スバルーン10重量部および平均粒径 0.5〜３mmのネオラ
イト（抗火石を原料とした焼成発泡粒の軽量骨材，新島
物産社製）50重量部を用いたこと以外は，実施例１と同
様にしてセメント成形体を作製した。ただし水の量は70
重量部とした。セメント成形体の全体の厚さは23mmであ
り，上層の層厚は18mmであった。成形体の重量は2.48kg
であり，比重は 1.2であった。このセメント成形体を実
施例１と同様の方法により評価したところ，落球試験で
は異常がなく，曲げ強度は 165kg／cm2であった。これ
らの結果を下表に示す。Example 7 An aramid mesh material HM-1001 (manufactured by Teijin) was used as the fiber mesh material, and an average particle size of 40 was used as the inorganic lightweight aggregate.
10 parts by weight of shirasu balloon with an average particle size of 50 μm and neolite with an average particle size of 0.5 to 3 mm (light-weight aggregate of fired foamed granules made of anti-firestone, manufactured by Niijima Bussan Co., Ltd.) in place of the shirasu balloon of 50 μm A cement molded product was produced in the same manner as in Example 1 except that was used. However, the amount of water is 70
It was made into a weight part. The total thickness of the cement compact was 23 mm, and the upper layer thickness was 18 mm. The weight of the molded body is 2.48 kg
And the specific gravity was 1.2. When this cement molded product was evaluated by the same method as in Example 1, there was no abnormality in the falling ball test, and the bending strength was 165 kg / cm 2 . The results are shown in the table below.
実施例８ 繊維メッシュ材としてアラミドメッシュ材HM−1010（テ
イジン社製）を用い，無機軽量骨材として，平均粒径40
μｍのシラスバルーンに代えて，平均粒径 100μｍの非
吸水性パーライト（宇部興産社製）を用いたこと以外
は，実施例１と同様にしてセメント成形体を作製した。
セメント成形体の全体の厚さは21mmであり，上層の層厚
は16mmであった。成形体の重量は2.84kgであり，比重は
1.5であった。このセメント成形体を実施例１と同様の
方法により評価したところ，落球試験では異常がなく，
曲げ強度は 180kg／cm2であった。これらの結果を下表
に示す。Example 8 An aramid mesh material HM-1001 (manufactured by Teijin) was used as the fiber mesh material, and an average particle size of 40 was used as the inorganic lightweight aggregate.
A cement molded product was produced in the same manner as in Example 1 except that non-water-absorbing perlite (manufactured by Ube Industries, Ltd.) having an average particle size of 100 μm was used in place of the Shirasu balloon of μm.
The total thickness of the cement compact was 21 mm, and the upper layer thickness was 16 mm. The weight of the molded body is 2.84 kg, and the specific gravity is
It was 1.5. When this cement compact was evaluated by the same method as in Example 1, there was no abnormality in the falling ball test,
The bending strength was 180 kg / cm 2 . The results are shown in the table below.
実施例９ 上層用材料にビニロン繊維（径14.2μｍ，長さ６mm）を
２重量部添加したこと以外は，実施例７と同様にしてセ
メント成形体を作製した。セメント成形体の全体の厚さ
は23mmであり，上層の層厚は18mmであった。成形体の重
量は2.48kgであり，比重は 1.2であった。このセメント
成形体を実施例１と同様の方法により評価したところ，
落球試験では異常がなく，曲げ強度は 185kg／cm2であ
った。これらの結果を下表に示す。Example 9 A cement molded product was produced in the same manner as in Example 7 except that 2 parts by weight of vinylon fiber (diameter 14.2 μm, length 6 mm) was added to the upper layer material. The total thickness of the cement compact was 23 mm, and the upper layer thickness was 18 mm. The weight of the compact was 2.48 kg and the specific gravity was 1.2. When this cement compact was evaluated by the same method as in Example 1,
There was no abnormality in the falling ball test, and the bending strength was 185 kg / cm 2 . The results are shown in the table below.
比較例１ 金型として，排水用細孔を有しない金型を用いたこと以
外は，実施例１と同様にしてセメント成形体を作製し
た。セメント成形体の全体の厚さは21mmであり，上層の
層厚は16mmであった。成形体の重量は2.45kgであり，比
重は 1.3であった。このセメント成形体を実施例１と同
様の方法により評価したところ，落球試験ではクラック
が発生し，曲げ強度は 120kg／cm2であった。これらの
結果を下表に示す。Comparative Example 1 A cement molded product was produced in the same manner as in Example 1 except that a mold having no drainage pores was used as the mold. The total thickness of the cement compact was 21 mm, and the upper layer thickness was 16 mm. The weight of the compact was 2.45 kg and the specific gravity was 1.3. When this cement molded product was evaluated in the same manner as in Example 1, cracks occurred in the falling ball test and the bending strength was 120 kg / cm 2 . The results are shown in the table below.
比較例２ 上層用材料にシラスバルーン（無機軽量骨材）を含有さ
せなかったこと以外は，実施例１と同様にしてセメント
成形体を作製した。セメント成形体の全体の厚さは13mm
であり，上層の層厚は９mmであった。成形体の重量は2.
20kgであり，比重は 1.9であった。このセメント成形体
を実施例１と同様の方法により評価したところ，落球試
験ではクラックが発生し，曲げ強度は 150kg／cm2であ
った。これらの結果を下表に示す。Comparative Example 2 A cement molded product was produced in the same manner as in Example 1 except that the upper layer material did not contain Shirasu balloon (inorganic lightweight aggregate). The overall thickness of the cement compact is 13 mm
And the layer thickness of the upper layer was 9 mm. The weight of the compact is 2.
It weighed 20 kg and had a specific gravity of 1.9. When this cement molded product was evaluated by the same method as in Example 1, cracks were generated in the falling ball test and the bending strength was 150 kg / cm 2 . The results are shown in the table below.
比較例３ 下層用材料のアラミド繊維の長さを30mmとしたこと以外
は，実施例１と同様にしてセメント成形体を作製した。
セメント成形体の全体の厚さは21mmであり，上層の層厚
は16mmであった。成形体の重量は 2.5kgであり，比重は
1.3であった。このセメント成形体を実施例１と同様の
方法により評価したところ，落球試験では割れが発生
し，曲げ強度は70kg／cm2であった。これらの結果を下
表に示す。Comparative Example 3 A cement molded product was produced in the same manner as in Example 1 except that the length of the aramid fiber as the lower layer material was 30 mm.
The total thickness of the cement compact was 21 mm, and the upper layer thickness was 16 mm. The weight of the compact is 2.5 kg, and the specific gravity is
It was 1.3. When this cement compact was evaluated in the same manner as in Example 1, cracks occurred in the falling ball test and the bending strength was 70 kg / cm 2 . The results are shown in the table below.
比較例４ 下層用材料のアラミド繊維および上層に添加するビニロ
ン繊維の長さを30mmとしたこと以外は，実施例９と同様
にしてセメント成形体を作製した。セメント成形体の全
体の厚さは21mmであり，上層の層厚は16mmであった。成
形体の重量は 2.5kgであり，比重は 1.3であった。この
セメント成形体を実施例１と同様の方法により評価した
ところ，落球試験では割れが発生し，曲げ強度は30kg／
cm2であった。これらの結果を下表に示す。Comparative Example 4 A cement molded product was produced in the same manner as in Example 9 except that the length of the aramid fiber as the lower layer material and the vinylon fiber added to the upper layer was 30 mm. The total thickness of the cement compact was 21 mm, and the upper layer thickness was 16 mm. The weight of the compact was 2.5 kg and the specific gravity was 1.3. When this cement compact was evaluated by the same method as in Example 1, cracks occurred in the falling ball test and the bending strength was 30 kg /
It was cm 2 . The results are shown in the table below.
比較例５ 下層用材料のアラミド繊維の量を８重量部としたこと以
外は，実施例１と同様にしてセメント成形体を作製した
ものの，繊維の分散が悪く，混練時間を延長したが，逆
にファイバーボールができて使用できなかった。Comparative Example 5 A cement molded product was produced in the same manner as in Example 1 except that the amount of the aramid fiber as the lower layer material was 8 parts by weight, but the dispersion of the fiber was poor and the kneading time was extended. I couldn't use the fiber ball because it was made.
比較例６ 上層用材料を用いず，実施例１の配合の下層用材料をオ
ムニミキサーで混合した後，この混合物約 2.5kgを実施
例１の金型と下型に供給した。これを50kg／cm2の圧力
で60秒間脱水プレス成形したこと以外は，実施例１と同
様にしてセメント成形体を作製した。成形体の重量は
2.0kgであり，比重は 2.0であった。このセメント成形
体を実施例１と同様の方法により評価したところ，落球
試験では割れが発生し，曲げ強度は 200kg／cm2であっ
た。これらの結果を下表に示す。Comparative Example 6 Without using the upper layer material, the lower layer material of Example 1 was mixed with an omni mixer, and then about 2.5 kg of this mixture was supplied to the mold and the lower mold of Example 1. A cement molded product was produced in the same manner as in Example 1 except that this was subjected to dehydration press molding at a pressure of 50 kg / cm 2 for 60 seconds. The weight of the molded body is
The weight was 2.0 kg and the specific gravity was 2.0. When this cement compact was evaluated by the same method as in Example 1, cracks occurred in the falling ball test and the bending strength was 200 kg / cm 2 . The results are shown in the table below.
比較例７ 繊維メッシュ材を配置しなかったこと以外は，実施例１
と同様にしてセメント成形体を作製した。セメント成形
体の全体の厚さは20mmであり，上層の層厚は15mmであっ
た。成形体の重量は 2.5kgであり，比重は 1.4であっ
た。このセメント成形体を実施例１と同様の方法により
評価したところ，落球試験では分断割れが発生し，曲げ
強度は 110kg／cm2であった。これらの結果を下表に示
す。Comparative Example 7 Example 1 except that the fiber mesh material was not arranged.
A cement molded product was produced in the same manner as in. The total thickness of the cement compact was 20 mm and the thickness of the upper layer was 15 mm. The weight of the compact was 2.5 kg and the specific gravity was 1.4. When this cement molded product was evaluated by the same method as in Example 1, split cracking occurred in the falling ball test and the bending strength was 110 kg / cm 2 . The results are shown in the table below.
実施例および比較例から明らかなように，本発明のセメ
ント成形体は，軽量にして耐衝撃性に優れている。曲げ
強度の値も高い。キャビティ面に排水用細孔のない金型
を用いてセメント成形体を成形すれば，成形時の脱水が
困難である。そのために，上層と下層と界面に水や空気
が残留し，成形体の強度が低下する。上層と下層の間に
繊維メッシュ材の配置されていないセメント成形体は，
落球試験にてクラックや分断割れが発生し，耐衝撃性に
欠ける。無機軽量骨材を含有しないセメント成形体，強
化繊維および有機繊維の長さが30mmのセメント成形体，
および強化繊維の含有量が８重量％（下層メント成形体
の全重量に対し）のセメント成形体は，いずれも，耐衝
撃性に欠けるうえに，曲げ強度の値も低い。下層用材料
のみを用いて形成されたセメント成形体は，曲げ強度の
値は高いものの，軽量化が不充分である。落球試験にて
割れが発生し，耐衝撃性にも欠ける。As is clear from Examples and Comparative Examples, the cement molded product of the present invention is lightweight and has excellent impact resistance. The value of bending strength is also high. If a cement compact is molded using a mold that does not have pores for drainage on the cavity surface, dehydration during molding is difficult. As a result, water and air remain at the interface between the upper layer and the lower layer, and the strength of the compact decreases. Cement compacts without fiber mesh material between the upper and lower layers are
Cracks and fractures occur in the falling ball test, resulting in poor impact resistance. Cement compact containing no inorganic lightweight aggregate, cement compact with reinforcing fiber and organic fiber having a length of 30 mm,
In addition, the cement moldings having a reinforcing fiber content of 8% by weight (based on the total weight of the lower layer ment molding) have poor impact resistance and low flexural strength. Although the cement molded product formed by using only the lower layer material has a high bending strength value, the weight reduction is insufficient. Cracks occur in the falling ball test and impact resistance is also poor.
（発明の効果） 本発明のセメント成形体は，このように，無機軽量骨材
を含有する上層，強化繊維を含有する下層および上層と
下層の間に配置された繊維メッシュ材でなるため，軽量
にして耐衝撃性に優れている。人体に対して無害でもあ
る。その結果，このようなセメント成形体は，例えば，
住宅のベランダやバルコニーなどの床を構成するデッキ
材に好適に用いられる。 (Effects of the Invention) Since the cement molded product of the present invention is thus composed of the upper layer containing the inorganic lightweight aggregate, the lower layer containing the reinforcing fibers, and the fiber mesh material arranged between the upper layer and the lower layer, it is lightweight. It has excellent impact resistance. It is also harmless to the human body. As a result, such cement compacts are, for example,
It is suitable for use as deck material for floors such as balconies and balconies of houses.
第１図は本発明のセメント成形体の一実施例を示す斜視
図である。 １……上層，２……下層，３……繊維メッシュ材。FIG. 1 is a perspective view showing an embodiment of the cement molded product of the present invention. 1 ... upper layer, 2 ... lower layer, 3 ... fiber mesh material.
Claims (14)
強化繊維を含有するセメント成形体であって， 該上層と該下層の間に繊維メッシュ材を配置したセメン
ト成形体。1. A cement molded product in which an upper layer contains an inorganic lightweight aggregate and a lower layer contains a reinforcing fiber, wherein a fiber mesh material is arranged between the upper layer and the lower layer.
水プレス成形により得られる特許請求の範囲第１項に記
載のセメント成形体。2. The cement molded product according to claim 1, which is obtained by dewatering press molding using a mold having drainage pores on the mold surface.
曜石，真珠岩などの天然ガラス質鉱物から得られる特許
請求の範囲第１項に記載のセメント成形体。3. The cement molded product according to claim 1, wherein the inorganic lightweight aggregate is obtained from natural glassy minerals such as shirasu, anti-firestone, obsidian, and pearlite.
2以上である特許請求の範囲第１項に記載のセメント成
形体。4. The tensile elastic modulus of the reinforcing fiber is 3000 kg / mm.
The cement molded product according to claim 1, which is 2 or more.
繊維およびカーボン繊維のうちの少なくとも一種である
特許請求の範囲第１項に記載のセメント成形体。5. The cement molded product according to claim 1, wherein the reinforcing fiber is at least one of aramid fiber, vinylon fiber and carbon fiber.
kg／mm２以上である特許請求の範囲第１項に記載のセメ
ント成形体。6. The tensile elastic modulus of the fiber mesh material is 3000.
The cement molded product according to claim 1, which has a weight of not less than kg / mm 2 .
ニロン繊維およびカーボン繊維のうちの少なくとも一種
から構成された特許請求の範囲第１項に記載のセメント
成形体。7. The cement molded product according to claim 1, wherein the fiber mesh material is composed of at least one of aramid fiber, vinylon fiber and carbon fiber.
特許請求の範囲第１項に記載のセメント成形体。8. The cement molded product according to claim 1, wherein the specific gravity of the upper layer is in the range of 0.5 to 1.5.
10倍である特許請求の範囲第１項に記載のセメント成形
体。9. The layer thickness of the upper layer relative to the lower layer is 3 to
The cement molded product according to claim 1, which is 10 times larger.
メント 100重量部に対し，５〜 500重量部の範囲で含有
された特許請求の範囲第１項に記載のセメント成形体。10. The cement molded product according to claim 1, wherein the inorganic lightweight aggregate is contained in the upper layer in an amount of 5 to 500 parts by weight relative to 100 parts by weight of cement.
％以上の範囲で含有された特許請求の範囲第１項に記載
のセメント成形体。11. The cement molded product according to claim 1, wherein the reinforcing fiber is contained in the lower layer in an amount of 6% by weight or more.
ある特許請求の範囲第１項に記載のセメント成形体。12. The cement molded product according to claim 1, wherein the reinforcing fibers have a length of 3 to 20 mm.
以下の微粒骨材および平均粒径 300μｍ以上の粗骨材を
含有する特許請求の範囲第１項に記載のセメント成形
体。13. The inorganic lightweight aggregate has an average particle size of 100 μm.
The cement molded product according to claim 1, containing the following fine aggregate and coarse aggregate having an average particle diameter of 300 μm or more.
の範囲第１項に記載のセメント成形体。14. The cement molded product according to claim 1, wherein the upper layer contains an organic fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4221187A JPH0622982B2 (en) | 1987-02-24 | 1987-02-24 | Cement molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4221187A JPH0622982B2 (en) | 1987-02-24 | 1987-02-24 | Cement molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63207637A JPS63207637A (en) | 1988-08-29 |
| JPH0622982B2 true JPH0622982B2 (en) | 1994-03-30 |
Family
ID=12629689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4221187A Expired - Lifetime JPH0622982B2 (en) | 1987-02-24 | 1987-02-24 | Cement molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0622982B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008530405A (en) * | 2005-02-15 | 2008-08-07 | ジェイムズ ハーディー インターナショナル ファイナンス ビー．ブイ． | Flooring sheet and modular flooring system |
| JP2022183511A (en) * | 2021-05-31 | 2022-12-13 | 大成建設株式会社 | Manufacturing method of laminate and laminate |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT8822310A0 (en) * | 1988-10-14 | 1988-10-14 | Fibronit Spa | BUILDING SLABS MADE OF CEMENTITIOUS MATERIAL REINFORCED BY MESH OF PLASTIC MATERIAL AND GLASS FIBERS |
-
1987
- 1987-02-24 JP JP4221187A patent/JPH0622982B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008530405A (en) * | 2005-02-15 | 2008-08-07 | ジェイムズ ハーディー インターナショナル ファイナンス ビー．ブイ． | Flooring sheet and modular flooring system |
| JP2022183511A (en) * | 2021-05-31 | 2022-12-13 | 大成建設株式会社 | Manufacturing method of laminate and laminate |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63207637A (en) | 1988-08-29 |
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