JPH10231160A - Hard wood chip cement board and its production - Google Patents
Hard wood chip cement board and its productionInfo
- Publication number
- JPH10231160A JPH10231160A JP3893797A JP3893797A JPH10231160A JP H10231160 A JPH10231160 A JP H10231160A JP 3893797 A JP3893797 A JP 3893797A JP 3893797 A JP3893797 A JP 3893797A JP H10231160 A JPH10231160 A JP H10231160A
- Authority
- JP
- Japan
- Prior art keywords
- mixture
- cement
- wood
- deposited
- wood chip
- 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
-
- 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
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、釘打ち性および平
滑性に優れた硬質木片セメント板およびその製造方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hard wood chip cement board excellent in nailing properties and smoothness and a method for producing the same.
【0002】[0002]
【従来の技術と発明が解決しようとする課題】従来、外
装材,下地材として広く用いられている硬質木片セメン
ト板は、セメントと木片とを主体とする混合物を圧締
し、養生硬化させたものである。すなわち、セメント,
木片および骨材等の原料を混合して得た混合物をフォー
ミングチャンバー内で落下させ、これを、搬送コンベア
ベルトで搬送される下型板に散布堆積させて堆積物を得
た後、その上に上型板を載せて圧締し、養生硬化させる
ことにより、硬質木片セメント板を製造していた。2. Description of the Related Art Conventionally, a hard wood chip cement board, which has been widely used as an exterior material and a base material, is obtained by pressing a mixture mainly composed of cement and wood chips and curing the mixture. Things. That is, cement,
The mixture obtained by mixing the raw materials such as wood chips and aggregates is dropped in a forming chamber, and the mixture is sprayed and deposited on a lower mold plate conveyed by a conveyor belt to obtain a sediment. The hard wood chip cement board was manufactured by placing and pressing the upper mold board and curing and curing.
【0003】特に、混合物を落下させて散布する際に、
前記混合物に風を吹き付けて分級すると、細かく軽い原
料が遠くに飛ばされて落下する一方、粗く重い原料が近
くに落下する。このため、搬送方向と逆方向に風を吹き
付けると、上流側の下型板の上面に細かく軽い原料が最
初に堆積し、順次、粗く重い原料が堆積した堆積物が得
られる。この結果、この堆積物の最下面に細かい木片,
骨材等が堆積し、表面性に優れた硬質木片セメント板が
得られる。In particular, when the mixture is dropped and sprayed,
When the mixture is blown and classified, fine and light raw materials are blown away and fall, while coarse and heavy raw materials fall nearby. For this reason, when wind is blown in the direction opposite to the transport direction, fine and light raw materials are first deposited on the upper surface of the lower die plate on the upstream side, and deposits in which coarse and heavy raw materials are sequentially deposited are obtained. As a result, a small piece of wood,
Aggregate and the like are deposited, and a hard wood chip cement board having excellent surface properties can be obtained.
【0004】しかしながら、前述の硬質木片セメント板
によれば、風を強く吹き付けると、表面部分が密になっ
て硬くなりすぎ、釘打ち作業が困難になるとともに、ヒ
ビ割れが発生しやすいという問題点がある。[0004] However, according to the above-mentioned hard wood cement board, when the wind is blown strongly, the surface portion becomes too dense and becomes too hard, so that nailing work becomes difficult and cracks are easily generated. There is.
【0005】逆に、風を止めたり、搬送方向に沿って風
を吹き付けると、下型板の上面に粗く重い原料が堆積す
ることになり、堆積物の最下面、すなわち、表面側には
粗く重い木片,骨材等が堆積して疎になる。このため、
釘打ち作業が容易になる反面、表面性が低下するととも
に、表面強度も弱くなり、実用に供し得ないという問題
点がある。Conversely, if the wind is stopped or blown along the transport direction, coarse and heavy raw materials will be deposited on the upper surface of the lower mold plate, and the lowermost surface of the deposit, that is, the surface side, will be rough. Heavy wood chips and aggregates accumulate and become sparse. For this reason,
While the nailing operation is facilitated, there is a problem that the surface property is reduced and the surface strength is also weakened, so that it cannot be put to practical use.
【0006】本発明は、前記問題点に鑑み、外装材,下
地材に適した表面性を保持しつつ、釘打性を同時に兼ね
備えた硬質木片セメント板およびその製造方法を提供す
ることを目的とする。SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a hard wood chip cement board having nailing properties while maintaining surface properties suitable for an exterior material and a base material, and an object of the present invention. I do.
【0007】[0007]
【課題を解決するための手段】本発明にかかる硬質木片
セメント板は、前記目的を達成するため、セメントと木
片とを主体とする硬質木片セメント板において、表面部
分の木質量を8〜14重量%とした構成としてある。In order to achieve the above-mentioned object, a hard wood chip cement board according to the present invention has a hard wood chip cement board mainly composed of cement and wood chips, and has a surface portion having a wood mass of 8 to 14 weight. %.
【0008】また、セメントと木片とを主体とする表面
部分および内部部分からなる少なくとも2層以上の硬質
木片セメント板において、前記表面部分の木質量を8〜
14重量%、全体密度を0.7〜1.3g/cm3とし、前
記表面部分の密度が前記内部部分の密度よりも+0.0
5〜−0.1g/cm3以内とした構成であってもよい。[0008] In a hard wood chip cement board having at least two layers consisting of a surface portion and an inner portion mainly composed of cement and wood chips, the mass of the wood of the surface portion is 8 to 10%.
14% by weight, the overall density is 0.7 to 1.3 g / cm 3, and the density of the surface portion is + 0.0% higher than the density of the internal portion.
The configuration may be 5 to −0.1 g / cm 3 or less.
【0009】さらに、本発明にかかる硬質木片セメント
板の製造方法は、前記目的を達成するため、セメントお
よび木片を主体とする混合物をフォーミングチャンバー
内で落下させると同時に、風を吹き付けて分級し、搬送
手段によって搬送される下型板に散布堆積させて堆積物
を得た後、この堆積物に上型板を載せて圧締し、養生硬
化する硬質木片セメント板の製造方法において、硬質木
片セメント板の表面部分の木質量を8〜14重量%、全
体密度を0.7〜1.3g/cm3とするとともに、表面
部分の密度が内部部分の密度よりも+0.05〜−0.
1g/cm3以内となるように、フォーミングチャンバー
内で吹き付ける風の速度を10〜20m/秒とした工程
としてもよい。Further, in order to achieve the above object, the method for producing a hard wood chip cement board according to the present invention drops a mixture mainly composed of cement and wood chips in a forming chamber, and simultaneously classifies the mixture by blowing air. A method of manufacturing a hard wood chip cement board which is scattered and deposited on a lower mold board conveyed by a conveying means to obtain a deposit, and then the upper mold board is placed on the deposit and pressed to cure and harden. The wood mass of the surface portion of the board is 8-14% by weight, the overall density is 0.7-1.3 g / cm 3, and the density of the surface portion is + 0.05--0.
The process may be such that the speed of the air blown in the forming chamber is set to 10 to 20 m / sec so as to be within 1 g / cm 3 .
【0010】[0010]
【発明の実施の形態】次に、本発明にかかる一実施形態
を図1ないし図3の添付図面に従って説明する。セメン
トとしては、特に限定するものではなく、例えば、ポル
トランドセメント,高炉セメント,シリカセメント,フ
ライアッシュセメント,アルミナセメント等が挙げられ
る。また、反応性を向上させるために、珪酸質材料を加
えても良い。これには、例えば、珪砂,珪石粉,けい藻
土,シリカヒューム,フライアッシュ等が挙げられる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. The cement is not particularly limited, and examples thereof include Portland cement, blast furnace cement, silica cement, fly ash cement, and alumina cement. Further, a siliceous material may be added to improve the reactivity. This includes, for example, quartz sand, quartzite powder, diatomaceous earth, silica fume, fly ash and the like.
【0011】そして、本発明の硬質木片セメント板にお
いて、セメントは50重量%〜92重量%の範囲で添加
される。In the hard wood chip cement board of the present invention, the cement is added in a range of 50% by weight to 92% by weight.
【0012】木片としては、その樹種は特に問わない
が、例えば、杉,松等のチップや廃木材を粉砕したもの
を単独またはこれらを組み合わせて使用できる。The type of the wood chip is not particularly limited, and for example, chips of cedar, pine and the like and crushed waste wood can be used alone or in combination.
【0013】木片は、目開き4mmの篩を通過する大き
さのものが好ましい。目開き4mmの篩を通過できない
大きさの木片が混入していると、その部分が弱点となっ
て剥離強度が下がるからである。また、前記木片は平均
厚さ0.5mmの偏平なものが好ましい。[0013] The wood piece is preferably of a size that passes through a sieve having a mesh size of 4 mm. This is because if a piece of wood that cannot pass through a sieve having an opening of 4 mm is mixed, the portion becomes a weak point and the peel strength decreases. Preferably, the wood piece is a flat piece having an average thickness of 0.5 mm.
【0014】木片は8〜30重量%の範囲で添加され、
特に、表面部分における木片の添加量は8〜14重量%
であることが好ましい。木片の添加量が8重量%未満で
あると、表面が密になり、硬くなりすぎて釘打ちが困難
になるとともに、脆くなって釘打ち時に欠けや割れを生
じやすいからである。また、14重量%を越えると、木
片が多くなりすぎ、表面性が悪くなるとともに、セメン
トの割合が少なくなる。このため、木片同士の結合力が
弱くなり、強度が低下するとともに、釘保持力が低下
し、釘打ち時に欠けや割れを生じやすくなるからであ
る。The wood chips are added in the range of 8 to 30% by weight,
In particular, the amount of wood chips added to the surface is 8 to 14% by weight.
It is preferred that If the amount of the wood chips is less than 8% by weight, the surface becomes too dense and becomes too hard, which makes nailing difficult, and becomes brittle, so that chipping or cracking is likely to occur at the time of nailing. On the other hand, when the content exceeds 14% by weight, the amount of wood chips becomes too large, the surface properties deteriorate, and the proportion of cement decreases. For this reason, the bonding force between the pieces of wood is weakened, the strength is reduced, and the nail holding force is reduced, so that chipping or cracking is likely to occur when nailing.
【0015】なお、前記表面部分とは、全体厚さ寸法が
10〜30mmの硬質木片セメント板であれば、その表
面から1/4ないし1/40の厚さ寸法を有する密度が
略同一の表層部分をいう。1/4の厚さ寸法は、通常4
機のフォーミングチャンバーで形成する場合、表面の一
層部分すべてを木質量8〜14重量%に形成できる最大
の厚さ寸法であり、具体的には2.5〜7.5mm程度
である。一方、1/40の厚さ寸法は、表面部分として
薄い層をフォーミングチャンバーで形成する場合に、表
面部分すべてを木質量8〜14重量%に形成できる最小
の厚さ寸法であり、具体的には0.3〜0.8mm程度
である。The surface portion is a surface layer having a thickness of 1/4 to 1/40 from the surface of a hard wood chip cement board having an overall thickness of 10 to 30 mm and a density of approximately the same. Part. The thickness dimension of 1/4 is usually 4
When it is formed in a forming chamber of the machine, it is the maximum thickness dimension capable of forming the entire surface of one layer to a wood mass of 8 to 14% by weight, specifically, about 2.5 to 7.5 mm. On the other hand, the thickness dimension of 1/40 is the minimum thickness dimension that can form the entire surface portion to a wood mass of 8 to 14% by weight when a thin layer is formed as a surface portion in a forming chamber. Is about 0.3 to 0.8 mm.
【0016】硬質木片セメント板の比重を軽くするため
に軽量骨材を添加しても良い。例えば、パーライト,シ
ラスバルーン,ガラスバルーン等が挙げられ、これらを
単独あるいは組み合わせて使用できる。そして、0重量
%〜25重量%の範囲で添加される。A lightweight aggregate may be added to reduce the specific gravity of the hard wood chip cement board. For example, perlite, shirasu balloon, glass balloon and the like can be mentioned, and these can be used alone or in combination. And it is added in the range of 0% by weight to 25% by weight.
【0017】さらに、硬質木片セメント板に添加される
添加材としては、例えば、塩化マグネシウム,硫酸マグ
ネシウム,塩化カルシウム,アルミン酸ナトリウム,ア
ルミン酸カリウム,硫酸アルミニウム,水ガラス等の硬
化促進剤、バーミキュライト,ベントナイト等の鉱物粉
末,ワックス,パラフィン,シリコン等の撥水剤、合成
樹脂エマルジョン等の補強材、発泡性熱可塑性プラスチ
ックビーズ、プラスチック発泡体等を必要に応じて使用
できる。Further, as an additive to be added to the hard wood chip cement board, for example, a hardening accelerator such as magnesium chloride, magnesium sulfate, calcium chloride, sodium aluminate, potassium aluminate, aluminum sulfate, water glass, vermiculite, Mineral powders such as bentonite, water repellents such as wax, paraffin and silicone, reinforcing materials such as synthetic resin emulsions, foamable thermoplastic plastic beads, plastic foams, and the like can be used as necessary.
【0018】前述のセメント,木片,骨材,添加材およ
び水を混合して混合物を得る方法としては、既存の機械
を使用して混合すればよく、その混合方法は特に問わな
い。As a method of obtaining the mixture by mixing the above-mentioned cement, wood chips, aggregate, additive and water, mixing may be performed using an existing machine, and the mixing method is not particularly limited.
【0019】なお、本願の硬質木片セメント板は、その
全体密度が0.7〜1.3g/cm3の範囲であることが
好ましい。密度が0.7g/cm3未満であると、外壁材
としての十分な強度が得られないからであり、1.3g
/cm3を越えると、重すぎて施工性が悪くなるからであ
る。The hard wood chip cement board of the present application preferably has an overall density in the range of 0.7 to 1.3 g / cm 3 . When the density is less than 0.7 g / cm 3 , sufficient strength as an outer wall material cannot be obtained, and the density is 1.3 g.
If it exceeds / cm 3 , it is too heavy and the workability deteriorates.
【0020】また、隣接する表面部分と内部部分との密
度差は、表面部分の密度が内部部分の密度よりも+0.
05〜−0.1g/cm3となるようにすることが好まし
い。+0.05/cm3を越えて表面部分が密になると、
表面部分が剥離しやすくなり、−0.1g/cm3を越え
て内部部分が密になると、表面強度が弱くなり、釘打ち
性が悪くなるとともに、表面性も悪くなるからである。The density difference between the adjacent surface portion and the inner portion is that the density of the surface portion is +0.
It is preferable that the amount be in the range of 0.5 to -0.1 g / cm 3 . When the surface part becomes dense beyond + 0.05 / cm 3 ,
This is because, when the surface portion is easily peeled off and the internal portion is more dense than -0.1 g / cm 3 , the surface strength is weakened, the nailing property is deteriorated, and the surface property is also deteriorated.
【0021】次に、本願発明の硬質木片セメント板の製
造方法としては、例えば、図1に示すように、2台の第
1,第2フォーミングチャンバー20,30を利用して
製造する方法がある。すなわち、搬送コンベアベルト1
0によって矢印A方向に搬送される下型板11の上方
に、2台のフォーミングチャンバー20,30が搬送方
向に沿って線対称となるように配置されている。Next, as a method of manufacturing the hard wood chip cement board of the present invention, for example, as shown in FIG. 1, there is a method of manufacturing using two first and second forming chambers 20 and 30. . That is, the conveyor belt 1
Two forming chambers 20, 30 are arranged above the lower mold plate 11 conveyed in the direction of arrow A by 0 so as to be line-symmetric along the conveyance direction.
【0022】前記第1フォーミングチャンバー20は、
供給コンベアベルト21の下流端部の下方側に篩22を
傾斜させて配置してある。この篩22は、搬送方向と逆
方向に風を吹き出す送風ダクト23の空気吐出口24
と、空気排出口25との間に配置されている。The first forming chamber 20 comprises:
Below the downstream end of the supply conveyor belt 21, a sieve 22 is arranged at an angle. This sieve 22 is provided with an air discharge port 24 of a blowing duct 23 for blowing air in a direction opposite to the conveying direction.
And the air outlet 25.
【0023】一方、第2フォーミングチャンバー30
も、前記第1フォーミングチャンバー20と同様、供給
コンベアベルト31の下流端部の下方側に篩32を傾斜
させて配置してある。この篩32は、搬送方向に風を吹
き出す送風ダクト33の空気吐出口34と、空気排出口
35との間に配置されている。On the other hand, the second forming chamber 30
Similarly to the first forming chamber 20, a sieve 32 is arranged to be inclined below the downstream end of the supply conveyor belt 31. The sieve 32 is disposed between an air discharge port 34 of an air duct 33 that blows air in the transport direction and an air discharge port 35.
【0024】そして、搬送コンベアベルト10を矢印A
方向に移動させて下型板11を搬送する。一方、供給コ
ンベアベルト21を駆動し、これに前述の混合物12を
投下して下流端部に搬送し、傾斜する篩22に落下させ
る。このとき、送風ダクト23の空気吐出口24が風を
吹き付け、混合物12を篩別ける。このため、篩別けさ
れた混合物のうち、細かく軽い原料が上流側の下型板1
1に堆積し、粗く重い原料が中流側の下型板11に堆積
して堆積物13が得られる。この結果、堆積物13の最
下面に最も細かく軽い原料が最初に堆積し、密な表面部
分が形成される。Then, the conveyor belt 10 is moved in the direction indicated by the arrow A.
The lower mold plate 11 is conveyed in the direction of FIG. On the other hand, the supply conveyor belt 21 is driven, the mixture 12 described above is dropped, transported to the downstream end, and dropped on the inclined sieve 22. At this time, air is blown from the air discharge port 24 of the air blow duct 23, and the mixture 12 is sieved. For this reason, in the sieved mixture, the fine and light raw material is
1 and the coarse and heavy raw material is deposited on the lower mold plate 11 on the middle stream side, and a deposit 13 is obtained. As a result, the finest and lighter raw material is first deposited on the lowermost surface of the deposit 13 to form a dense surface portion.
【0025】さらに、第2フォーミングチャンバー30
の供給コンベアベルト31に前述と同一組成の混合物を
投下して下流端部に搬送し、傾斜する篩32上に落下さ
せる。このとき、送風ダクト33の空気吐出口34が風
を吹き付け、混合物12を篩別ける。このため、篩別け
された混合物のうち、粗く重い原料が中流側の下型板1
1に堆積し、細かく軽い原料が下流側の下型板11に堆
積する。この結果、堆積物13の最上面に最も細かく軽
い原料が堆積し、表裏面に密な表面部分を有する堆積物
13が得られる。Further, the second forming chamber 30
The mixture having the same composition as described above is dropped on the supply conveyor belt 31, and is conveyed to the downstream end, and is dropped on the inclined sieve 32. At this time, air is blown out from the air discharge port 34 of the air duct 33, and the mixture 12 is sieved. For this reason, the coarse and heavy raw material of the sieved mixture is the lower mold plate 1 on the middle stream side.
1 and fine and light raw material is deposited on the lower mold plate 11 on the downstream side. As a result, the finest and lightest raw material is deposited on the uppermost surface of the deposit 13, and the deposit 13 having a dense surface portion on the front and back surfaces is obtained.
【0026】表面部分の木質量が8〜14重量%、か
つ、表面部分の密度が内部部分の密度よりも+0.05
〜−0.1g/cm3となるように、前記混合物を篩分け
するために吹き付ける風の空気吐出口における速度は、
10〜20m/秒の範囲である。10m/秒未満の風速
であると、表面部分に粗く重い木片等が分布して表面性
が悪くなるからであり、20m/秒を越えると、表面が
密になりすぎて硬くなり、釘打ちが困難になるととも
に、剥離しやすくなるからである。The wood mass of the surface part is 8 to 14% by weight, and the density of the surface part is +0.05 more than the density of the inner part.
The speed at the air discharge port of the wind blown for sieving the mixture so as to be −0.1 g / cm 3 is:
The range is 10 to 20 m / sec. If the wind speed is less than 10 m / sec, coarse and heavy wood chips are distributed on the surface and the surface property is deteriorated. If the wind speed exceeds 20 m / sec, the surface becomes too dense and hard, and This is because it becomes difficult and easily peels off.
【0027】ついで、前記堆積物13の上面に表面模様
を設けた上型板(図示せず)を載せ、上型板および下型
板11で前記堆積物13を圧締した後、養生硬化させる
ことにより、硬質木片セメント板が得られる。Next, an upper mold plate (not shown) provided with a surface pattern is placed on the upper surface of the deposit 13, and the deposit 13 is pressed and clamped by the upper mold plate and the lower mold plate 11, and then cured and cured. Thereby, a hard wood chip cement board is obtained.
【0028】養生硬化は、セメントを硬化させて木片を
結合一体化する工程である。そして、蒸気養生,オート
クレーブ養生等の従来法を使用できる。Curing and curing is a process of curing cement to bond and integrate the wood pieces. Conventional methods such as steam curing and autoclave curing can be used.
【0029】なお、混合物の散布堆積は風を吹き付けて
行う場合に限らず、例えば、前述の製造方法において第
1,第2フォーミングチャンバーの間に、風を吹き付け
ず、かつ、混合物を単に落下させて散布堆積するだけの
フォーミングチャンバーを少なくとも1台配置し、これ
によって内部部分を形成することにより、肉厚の硬質木
片セメント板を形成してもよい。また、大きさの異なる
2種類の木片をそれぞれ含有する2種類の混合物を、風
を吹き付けずに順次散布堆積させることにより、密度の
異なる表面部分および内部部分を有する堆積物を形成し
てもよい。The spraying and deposition of the mixture is not limited to the case where the wind is blown. For example, in the above-described manufacturing method, the wind is not blown between the first and second forming chambers, and the mixture is simply dropped. By forming at least one forming chamber that only scatters and deposits, thereby forming an inner part, a thick hard wood chip cement board may be formed. In addition, two types of mixtures each containing two types of wood chips having different sizes may be sequentially sprayed and deposited without blowing the wind to form a deposit having a surface portion and an internal portion having different densities. .
【0030】[0030]
(実施例1)セメントとして市販のポルトランドセメン
ト92重量部、木片として目開き4mmの篩を通過する
木片8重量部、硬化剤として塩化カルシウム3重量部、
水40重量部を混合して混合物を得た。ついで、この混
合物を下型板に散布堆積して堆積物を得、その上に上型
板を載せ、圧締した後、養生硬化させることにより、厚
さ3mmの表面部分のみからなる比重1.1の硬質木片
セメント板が得られた。(Example 1) 92 parts by weight of commercially available Portland cement as cement, 8 parts by weight of a piece of wood passing through a 4 mm sieve as a piece of wood, 3 parts by weight of calcium chloride as a hardener,
40 parts by weight of water were mixed to obtain a mixture. Then, the mixture is sprayed and deposited on a lower mold plate to obtain a deposit, and the upper mold plate is placed thereon, pressed, cured and cured to obtain a specific gravity of only a surface portion having a thickness of 3 mm. 1 hard wood chip cement board was obtained.
【0031】(実施例2)実施例1と同一のセメントを
86重量部、実施例1と同一の木片を14重量部を添加
した点を除き、他は前述の実施例1と同様に処理して得
られたものをサンプルとした。(Example 2) Except that 86 parts by weight of the same cement as in Example 1 and 14 parts by weight of the same wood chip as in Example 1 were added, the same treatment was carried out as in Example 1 except for the above. The sample obtained was used as a sample.
【0032】(比較例1)実施例1と同一のセメントを
94重量部、実施例1と同一の木片を6重量部を添加し
た点を除き、他は前述の実施例1と同様に処理して得ら
れたものをサンプルとした。(Comparative Example 1) Except that 94 parts by weight of the same cement as in Example 1 and 6 parts by weight of the same wood chip as in Example 1 were added, the same treatment was carried out as in Example 1 except that The sample obtained was used as a sample.
【0033】(比較例2)実施例1と同一のセメントを
80重量部、実施例1と同一の木片を20重量部を添加
した点を除き、他は前述の実施例1と同様に処理して得
られたものをサンプルとした。なお、説明の便宜上、以
上のサンプルにつき、その組成等をまとめて図2(a)
に示す。Comparative Example 2 The same treatment as in Example 1 was performed except that 80 parts by weight of the same cement as in Example 1 and 20 parts by weight of the same wood chip as in Example 1 were added. The sample obtained was used as a sample. For convenience of explanation, the composition and the like of the above samples are summarized in FIG.
Shown in
【0034】以上のようにして得られたサンプルにつ
き、その表面性,釘打ち性について観察した。観察結果
を図2(b)に示す。ただし、表面性は、サンプルの表
面を目視することにより、商品として実用に供すること
ができるか否かを基準として判定した。また、釘打ち性
は、サンプルの表面に60度の角度で釘を打ち込んだと
き、サンプルの表面に全く変化がなかった場合には
「◎」とし、小さな膨れが生じた場合には「○」とし、
サンプルに大きな膨れが生じ、かつ、小さい欠けが生じ
た場合には「△」とし、サンプルに大きく深い欠けや割
れが生じた場合には「×」とした。The surface properties and nailing properties of the sample obtained as described above were observed. The observation results are shown in FIG. However, the surface property was determined by visually observing the surface of the sample, based on whether or not the sample could be put to practical use as a commercial product. The nailing property was evaluated as “、” when the surface of the sample was not changed at all when the nail was driven into the surface of the sample at an angle of 60 °, and “○” when a small swelling occurred. age,
When a large swelling and small chipping occurred in the sample, the sample was marked with “△”, and when a large and deep chipping or cracking occurred in the sample, it was marked with “x”.
【0035】表面性の観察結果から明らかなように、実
施例1,2は比較例1よりも劣っているが、比較例2よ
りも優れ、商品として実用上、問題がないことが判明し
た。As is clear from the observation results of the surface properties, Examples 1 and 2 were inferior to Comparative Example 1, but were superior to Comparative Example 2, and it was found that there was no practical problem as a commercial product.
【0036】釘打ち性の観察結果から明らかなように、
実施例1,2のいずれもが比較例1,2よりも釘打ち性
において優れていることが判明した。この結果、外装
材,下地材として実施例1,2が比較例1,2よりも総
合的に優れていることがわかった。これにより、実施例
1,2の木片およびセメントの添加量が硬質木片セメン
ト板として適正であることが判明した。As is clear from the observation results of the nailing property,
It was found that both Examples 1 and 2 were superior to Comparative Examples 1 and 2 in nailing properties. As a result, it was found that Examples 1 and 2 were overall superior to Comparative Examples 1 and 2 as the exterior material and the base material. This proved that the amounts of wood chips and cement added in Examples 1 and 2 were appropriate for a hard wood chip cement board.
【0037】(実施例3)図3(a)に示すように、セ
メントとして市販のポルトランドセメント100重量
部、木片として目開き4mmの篩を通過する木片35重
量部、硬化剤として塩化カルシウム5重量部、水60重
量部を混合して混合物を得た。この混合物を下型板に散
布堆積させて得た厚さ30mmの堆積物を上型板で圧締
した後、養生硬化させて厚さ13mmの硬質木片セメン
ト板を得、これをサンプルとした。Example 3 As shown in FIG. 3 (a), 100 parts by weight of commercially available Portland cement as cement, 35 parts by weight of a piece of wood passing through a 4 mm sieve as a piece of wood, and 5 parts by weight of calcium chloride as a hardening agent And 60 parts by weight of water to obtain a mixture. A 30 mm thick deposit obtained by spraying and depositing this mixture on a lower mold plate was pressed with an upper mold plate, and then cured and cured to obtain a 13 mm thick hard wood chip cement plate, which was used as a sample.
【0038】前記混合物を散布堆積する装置は、図1で
示した第1,第2フォーミンクチャンバーの間に、混合
物を単に落下させて散布堆積する第3,第4フォーミン
クチャンバーを配置したものである。そして、第1フォ
ーミンクチャンバー内で搬送方向と逆方向に風速19m
/秒の風を吹き付ける一方、第2フォーミンクチャンバ
ー内で搬送方向に沿って風速19m/秒の風を吹き付け
て分級し、第1,第3,第4,第2フォーミングチャン
バーを順次利用して混合物を散布堆積させ、堆積物を得
た。In the apparatus for dispersing and depositing the mixture, third and fourth forming chambers for dispersing and depositing the mixture by simply dropping the mixture are disposed between the first and second forming chambers shown in FIG. It is. Then, in the first forming chamber, the wind speed is 19 m in the direction opposite to the transport direction.
/ Second wind, while classifying by blowing a wind of 19 m / sec along the transport direction in the second forming chamber along the transport direction, using the first, third, fourth, and second forming chambers sequentially. The mixture was sprinkled and deposited to obtain a deposit.
【0039】前記堆積物を圧力20kg/cm2で圧締
し、温度80℃で8時間養生した後、40℃の屋内で3
日間放置することにより、硬質木片セメント板を得、こ
れをサンプルとした。The sediment was pressed at a pressure of 20 kg / cm 2 , cured at a temperature of 80 ° C. for 8 hours, and then indoors at 40 ° C. for 3 hours.
By leaving it to stand for a day, a hard wood chip cement board was obtained and used as a sample.
【0040】(実施例4)第1,第2フォーミンクチャ
ンバー内で吹き付ける風の速度をそれぞれ正逆14m/
秒とした点を除き、他は前述の実施例3と同様に処理す
ることにより、硬質木片セメント板を得、これをサンプ
ルとした。(Embodiment 4) The speed of the wind blown in the first and second forming chambers was 14 m /
A hard wood chip cement board was obtained and treated as a sample by treating in the same manner as in Example 3 except that the time was changed to seconds.
【0041】(実施例5)第1,第2フォーミンクチャ
ンバー内で吹き付ける風の速度をそれぞれ正逆10m/
秒とした点を除き、他は前述の実施例3と同様に処理す
ることにより、硬質木片セメント板を得、これをサンプ
ルとした。(Embodiment 5) The speed of the wind blown in the first and second forming chambers was 10 m /
A hard wood chip cement board was obtained and treated as a sample by treating in the same manner as in Example 3 except that the time was changed to seconds.
【0042】(比較例3)第1,第2フォーミンクチャ
ンバー内で吹き付ける風の速度をそれぞれ正逆21m/
秒とした点を除き、他は前述の実施例3と同様に処理す
ることにより、硬質木片セメント板を得、これをサンプ
ルとした。(Comparative Example 3) The speed of the wind blown in the first and second forming chambers was 21 m /
A hard wood chip cement board was obtained and treated as a sample by treating in the same manner as in Example 3 except that the time was changed to seconds.
【0043】(比較例4)すべてのフォーミンクチャン
バー内で風を吹き付けない点を除き、他は前述の実施例
3と同様に処理することにより、硬質木片セメント板を
得、これをサンプルとした。(Comparative Example 4) A hard wood chip cement board was obtained and treated as a sample by treating it in the same manner as in Example 3 except that air was not blown in all the forming chambers. .
【0044】そして、実施例3,4,5および比較例
3,4のサンプルそれぞれについて、表面部分における
木片とセメントとの比、表面部分と内部部分との密度
差、剥離強度、表面性、および、釘打ち性についてそれ
ぞれ測定,観察を行った。測定,観察結果を図3(b)
に示す。Then, for each of the samples of Examples 3, 4, 5 and Comparative Examples 3 and 4, the ratio of wood chips to cement at the surface portion, the density difference between the surface portion and the internal portion, the peel strength, the surface properties, and And nailing properties were measured and observed, respectively. Fig. 3 (b) shows the measurement and observation results.
Shown in
【0045】表面部分における木片とセメントとの比
は、表面から0.5mmまでの部分を削り出し、400
℃における重量減少率によって求めた。これは、各単体
の所定温度での重量減少率を一定とした場合、その混合
系の重量減少率が直線的に近似することを前提とし、計
算によって求めた。The ratio of wood chips to cement at the surface portion was determined by shaving a portion up to 0.5 mm from the surface,
It was determined by the weight loss rate at ° C. This was determined by calculation on the assumption that the weight loss rate of each mixed system at a predetermined temperature was constant, and the weight loss rate of the mixed system was linearly approximated.
【0046】表面部分と内部部分との密度差は、深さに
応じて測定して得た密度測定グラフ図に基づき、表面か
ら0.5mm付近の密度と、表面から3mm付近の密度
との差を求めた。The density difference between the surface portion and the inner portion is determined based on a density measurement graph obtained by measuring according to the depth, based on the difference between the density near 0.5 mm from the surface and the density near 3 mm from the surface. I asked.
【0047】剥離強度は、JIS−A5905 繊維板
に対して行う試験方法に準じて測定した。The peel strength was measured according to a test method performed on JIS-A5905 fiberboard.
【0048】表面性および釘打ち性は前述の実施例1,
2および比較例1,2に対して行った方法と同一の方法
により、実験,観察した。The surface properties and nailing properties were determined in Example 1 described above.
2 and Comparative Examples 1 and 2, experiments and observations were performed by the same method as that performed for Comparative Examples 1 and 2.
【0049】図3(b)から明らかなように、剥離強
度、表面性および釘打ち性のすべてについて、実施例
3,4,5のいずれもが実用に供することができるのに
対し、比較例3は剥離強度が低く、実用に供し得ないも
のであることが判明した。さらに、実施例3,4,5の
いずれもが比較例4よりも表面性および釘打ち性におい
て優れていることが判明した。これにより、内部部分よ
りも表面部分が疎である実施例3,4,5であっても、
その表面部分におけるセメントおよび木片の添加量が適
正であれば、所望の硬質木片セメント板を得られること
がわかった。As is clear from FIG. 3B, all of Examples 3, 4 and 5 can be put to practical use in all of peel strength, surface properties and nailing properties, while Comparative Examples Sample No. 3 was found to have a low peel strength and could not be used practically. Further, it was found that all of Examples 3, 4, and 5 were superior to Comparative Example 4 in surface properties and nailing properties. Thereby, even in Examples 3, 4, and 5 where the surface portion is sparser than the inner portion,
It has been found that a desired hard wood chip cement board can be obtained if the amounts of cement and wood chips added to the surface portion are proper.
【0050】比較例3から、表面部分と内部部分との密
度差が0.07g/cm3程度でも、剥離強度が低くなる
ことがわかった。From Comparative Example 3, it was found that the peel strength was low even when the density difference between the surface portion and the inner portion was about 0.07 g / cm 3 .
【0051】また、所望の表面性および釘打ち性を得る
ためには、セメントとの重量比において8重量%以上で
あることが必要であり、11重量%であっても所望の表
面性および釘打ち性を確保できることが判明した。In order to obtain desired surface properties and nailing properties, it is necessary that the weight ratio to cement is 8% by weight or more, and even if it is 11% by weight, the desired surface properties and nailing properties are obtained. It turned out that hitting property could be secured.
【0052】[0052]
【発明の効果】以上の説明から明らかなように、本発明
にかかる請求項1の硬質木片セメント板によれば、表面
性および釘打ち性に優れた硬質木片セメント板が得られ
る。請求項2によれば、前述の効果に加え、層間剥離が
生じにくい硬質木片セメント板が得られる。請求項3に
よれば、前述の特性を備えた硬質木片セメント板を、連
続的かつ高い生産性で製造できるという効果がある。As is clear from the above description, according to the hard wood chip cement board of the first aspect of the present invention, a hard wood cement board excellent in surface properties and nailing properties can be obtained. According to the second aspect, in addition to the above effects, a hard wood chip cement board in which delamination hardly occurs is obtained. According to claim 3, there is an effect that a hard wood chip cement board having the above-mentioned characteristics can be manufactured continuously and with high productivity.
【図1】 本願発明の一実施形態にかかる生産工程を示
す概略正面図である。FIG. 1 is a schematic front view showing a production process according to an embodiment of the present invention.
【図2】 実施例1,2および比較例1,2を示し、図
(a)は成分組成を示す図表であり、図(b)は測定,
観察結果を示す図表である。FIGS. 2A and 2B show Examples 1 and 2 and Comparative Examples 1 and 2, wherein FIG. 2A is a table showing component compositions, and FIG.
It is a chart showing an observation result.
【図3】 実施例3,4,5および比較例3,4を示
し、図(a)は成分組成を示す図表であり、図(b)は
製造条件および観察結果を示す図表である。FIGS. 3A and 3B show Examples 3, 4, and 5 and Comparative Examples 3 and 4, wherein FIG. 3A is a table showing component compositions, and FIG. 3B is a table showing manufacturing conditions and observation results.
10…搬送コンベアベルト、11…下型板、12…混合
物、13…堆積物、20,30…第1,第2フォーミン
グチャンバー、21,31…供給コンベアベルト、2
2,32…篩、23,33…送風ダクト、24,34…
空気吐出口、25,35…空気排出口。DESCRIPTION OF SYMBOLS 10 ... Conveyor belt, 11 ... Lower mold plate, 12 ... Mixture, 13 ... Sediment, 20, 30 ... 1st, 2nd forming chamber, 21, 31 ... Supply conveyor belt, 2
2, 32 ... sieve, 23, 33 ... air duct, 24, 34 ...
Air outlets, 25, 35 ... air outlets.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 FI C04B 103:14 111:30 (72)発明者 日笠 基 富山県東砺波郡井波町井波1番地の1 大 建工業株式会社内──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 6 Identification symbol FI C04B 103: 14 111: 30 (72) Inventor Motoi Hikasa 1 Dai-Ichi Kogyo Co., Ltd.
Claims (3)
セメント板において、表面部分の木質量を8〜14重量
%としたことを特徴とする硬質木片セメント板。1. A hard wood chip cement board mainly composed of cement and wood chips, wherein the wood mass of the surface portion is 8 to 14% by weight.
および内部部分からなる少なくとも2層以上の硬質木片
セメント板において、 前記表面部分の木質量を8〜14重量%、全体密度を
0.7〜1.3g/cm3とし、前記表面部分の密度が前記
内部部分の密度よりも+0.05〜−0.1g/cm3以
内であることを特徴とする硬質木片セメント板。2. A hard wood chip cement board comprising at least two layers consisting of a surface portion and an inner portion mainly composed of cement and wood chips, wherein said surface portion has a wood mass of 8 to 14% by weight and an overall density of 0.7. and ~1.3g / cm 3, hard cemented chip board, characterized in that the density of the surface portion than said density of the inner part is within + 0.05~-0.1g / cm 3.
をフォーミングチャンバー内で落下させると同時に、風
を吹き付けて分級し、搬送手段によって搬送される下型
板に散布堆積させて堆積物を得た後、この堆積物に上型
板を載せて圧締し、養生硬化する硬質木片セメント板の
製造方法において、 硬質木片セメント板の表面部分の木質量を8〜14重量
%、全体密度を0.7〜1.3g/cm3とするととも
に、表面部分の密度が内部部分の密度よりも+0.05
〜−0.1g/cm3以内となるように、フォーミングチ
ャンバー内で吹き付ける風の速度を10〜20m/秒と
したことを特徴とする硬質木片セメント板の製造方法。3. A mixture mainly composed of cement and wood chips is dropped in a forming chamber, and at the same time, air is blown to classify the mixture, and the mixture is dispersed and deposited on a lower mold plate conveyed by a conveying means to obtain a sediment. A method of manufacturing a hard wood chip cement board which puts an upper mold plate on this sediment, presses and cures and hardens the hard wood chip board. 1.3 g / cm 3 and the density of the surface portion is +0.05 more than the density of the inner portion.
So that ~-0.1g / cm 3 less, method for producing a rigid cemented chip board, characterized in that the speed of the wind blowing in the forming chamber and 10 to 20 m / sec.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3893797A JPH10231160A (en) | 1997-02-24 | 1997-02-24 | Hard wood chip cement board and its production |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3893797A JPH10231160A (en) | 1997-02-24 | 1997-02-24 | Hard wood chip cement board and its production |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH10231160A true JPH10231160A (en) | 1998-09-02 |
Family
ID=12539148
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3893797A Pending JPH10231160A (en) | 1997-02-24 | 1997-02-24 | Hard wood chip cement board and its production |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH10231160A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000170305A (en) * | 1998-12-03 | 2000-06-20 | Okura Ind Co Ltd | Sound insulation floor panel and sound insulation floor panel mounting structure |
JP2016000928A (en) * | 2014-06-12 | 2016-01-07 | Jfe建材株式会社 | Roof structure |
-
1997
- 1997-02-24 JP JP3893797A patent/JPH10231160A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000170305A (en) * | 1998-12-03 | 2000-06-20 | Okura Ind Co Ltd | Sound insulation floor panel and sound insulation floor panel mounting structure |
JP2016000928A (en) * | 2014-06-12 | 2016-01-07 | Jfe建材株式会社 | Roof structure |
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