JP3211204B2 - Wood cement board manufacturing method - Google Patents
Wood cement board manufacturing methodInfo
- Publication number
- JP3211204B2 JP3211204B2 JP30951899A JP30951899A JP3211204B2 JP 3211204 B2 JP3211204 B2 JP 3211204B2 JP 30951899 A JP30951899 A JP 30951899A JP 30951899 A JP30951899 A JP 30951899A JP 3211204 B2 JP3211204 B2 JP 3211204B2
- Authority
- JP
- Japan
- Prior art keywords
- wood
- cement
- alkaline earth
- earth metal
- cement board
- 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 - Fee Related
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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00577—Coating or impregnation materials applied by spraying
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
-
- 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
Description
【０００１】[0001]
【産業上の利用分野】本発明は、主として建築物に使用
される木質セメント板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 method for producing a wood cement board mainly used for buildings.
【０００２】[0002]
【従来の技術】木質セメント板は、木質補強材とセメン
ト系無機材料とを主な原料として湿式法、乾式法あるい
は半乾式法によってマットをフォーミングし、該マット
を一次養生した後、常温養生又はオートクレーブ養生等
の二次あるいは三次養生を行ない、最後に乾燥工程を経
て製造されている。該木質補強材としては木片、木毛、
木質パルプ等が用いられる。従来より、木質セメント板
におけるセメントの硬化を促進するために、塩化カルシ
ウムや塩化マグネシウム等の金属塩化物が硬化促進剤と
して使用されている。2. Description of the Related Art A wood cement board is formed by using a wood reinforcing material and a cement-based inorganic material as main raw materials, forming a mat by a wet method, a dry method, or a semi-dry method. It is manufactured through secondary or tertiary curing such as autoclave curing, and finally through a drying process. Wood reinforcement, wood wool,
Wood pulp or the like is used. Conventionally, metal chlorides such as calcium chloride and magnesium chloride have been used as a hardening accelerator in order to accelerate hardening of cement in a wood cement board.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記金
属塩化物を特定の木質樹種に添加する場合には、該金属
塩化物のセメントに対する硬化促進効果が不充分である
こともあり、水とセメントクリンカーとの反応時に通常
の石膏型エトリンガイトが生成し、得られる木質セメン
ト板は上記乾燥工程中も寸法変化を起すおそれがあるた
め、製品寸法に裁断するのは最終工程である乾燥工程の
後であり、二次あるいは三次養生前に製品寸法に裁断す
ることは考えられなかった。しかし乾燥後に切断するこ
とは木質セメント板の硬度が高くなって裁断時に切断刃
の摩耗、損傷が起り易いと言う問題点がある。さらに、
上記金属塩化物は、鉄等の金属を錆びさせたり、塩素・
塩化物によって人体に悪影響を及ぼしたり、焼却時にダ
イオキシンの発生原因となる等、種々の問題を有してい
る。したがって、本発明の課題は、セメントの速やかな
硬化および石膏型エトリンガイトの生成の防止が可能で
一時養生後に製品寸法に裁断出来、更に塩化物に起因す
る上記問題のない木質セメント板の製造方法を提供する
ことである。However, when the above-mentioned metal chloride is added to a specific woody species, the effect of the metal chloride on hardening of cement may be insufficient. The usual gypsum-type ettringite is produced during the reaction with, and the resulting wood cement board may undergo a dimensional change during the above-mentioned drying step. It was not conceivable to cut into product dimensions before secondary or tertiary curing. However, cutting after drying has the problem that the hardness of the wood cement board increases, and the cutting blade is liable to be worn or damaged during cutting. further,
The above metal chlorides can rust metals such as iron,
There are various problems, such as adverse effects on the human body due to chlorides and generation of dioxin during incineration. Therefore, an object of the present invention is to provide a method for producing a wood cement board which can quickly cure cement and prevent the formation of gypsum-type ettringite, can be cut into product dimensions after temporary curing, and can be free from the above-mentioned problems caused by chlorides. To provide.
【０００４】[0004]
【課題を解決するための手段】本発明は、上記課題を解
決するために、セメント系無機粉体と木質補強材とを含
有する混合物に蟻酸アルカリ土類金属塩および水を添加
混合した成形材料を基板上に散布してマットをフォーミ
ングし、該マットを圧締して一次養生し、該一次養生後
の半硬化板を製品寸法に裁断した後に常温養生又はオー
トクレーブ養生する木質セメント板の製造方法を提供す
るものである。In order to solve the above-mentioned problems, the present invention provides a molding material obtained by adding an alkaline earth metal formate and water to a mixture containing a cement-based inorganic powder and a wood reinforcing material. Is formed on a substrate, the mat is formed, the mat is pressed, the primary curing is performed, the semi-cured plate after the primary curing is cut into a product size, and then a room temperature curing or an autoclave curing is performed. Is provided.
【０００５】上記蟻酸アルカリ土類金属塩は水溶液とし
て該混合物に添加混合するのが望ましく、該蟻酸アルカ
リ土類金属塩は蟻酸カルシウムであるのが望ましい。上
記木質セメント板の製造方法は、特に該木質補強材にセ
メント硬化阻害物質を多量に含む樹種が含まれている場
合に望ましい方法である。[0005] The alkaline earth metal formate is desirably added to and mixed with the mixture as an aqueous solution, and the alkaline earth metal formate is desirably calcium formate. The above method for producing a wood cement board is a desirable method particularly when the wood reinforcing material contains a tree species containing a large amount of a cement hardening inhibitor.
【０００６】[0006]
【発明の実施の形態】以下、本発明を詳細に説明する。 〔セメント系無機粉体〕本発明に使用されるセメント系
無機粉体とは、ケイ酸カルシウムを主成分とした水硬性
の無機粉体であり、このような無機粉体としては、例え
ばポルトランドセメント、あるいはポルトランドセメン
トに高炉スラグを混合した高炉セメント、フライアッシ
ュを混合したフライアッシュセメント、火山灰や白土等
のシリカ物質を混合したシリカセメント、アルミナセメ
ント、高炉スラグ等がある。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. [Cement-based inorganic powder] The cement-based inorganic powder used in the present invention is a hydraulic inorganic powder containing calcium silicate as a main component, such as Portland cement Alternatively, there are blast furnace cement in which blast furnace slag is mixed with Portland cement, fly ash cement in which fly ash is mixed, silica cement in which silica materials such as volcanic ash and clay are mixed, alumina cement, blast furnace slag, and the like.
【０００７】〔木質補強材〕本発明に用いられる木質補
強材としては、木粉、木毛、木片、木質繊維、木質パル
プ、木質繊維束等があるが、該木質補強材には竹繊維、
麻繊維、バカス、モミガラ、稲わら等のリグノセルロー
スを主成分とする材料を混合してもよい。好ましい木質
補強材としては、巾０．５〜２．０mm、長さ１〜２０m
m、アスペクト比（長さ／厚み）２０〜３０の木片や、
直径０．１〜２．０mm、長さ２〜３５mmの分枝および／
又は彎曲および／又は折曲した木質繊維束がある。上記
木質補強材は、絶乾状態に換算して通常セメント系無機
粉体に対して５〜５０重量％程度混合される。[Wood reinforcement] Wood reinforcement, wood wool, wood chips, wood fiber, wood pulp, wood fiber bundle, etc. are used as wood reinforcement in the present invention.
Materials containing lignocellulose as a main component, such as hemp fiber, bacas, fir and rice straw, may be mixed. Preferred wood reinforcements are 0.5 to 2.0 mm in width and 1 to 20 m in length.
m, a piece of wood with an aspect ratio (length / thickness) of 20-30,
A branch having a diameter of 0.1 to 2.0 mm and a length of 2 to 35 mm and / or
Or a bent and / or bent bundle of wood fibers. The wood reinforcing material is usually mixed in an absolutely dry state in an amount of about 5 to 50% by weight based on the cement-based inorganic powder.
【０００８】〔骨材〕上記セメント系無機粉体および木
質補強材以外に、本発明においては骨材、特に軽量骨材
を混合してもよい。上記骨材としては、例えばケイ砂、
ケイ石粉等が使用され、上記軽量骨材としてはパーライ
ト、シラスバルーン、膨張頁岩、膨張粘土、焼成ケイ藻
土、フライアッシュ、石炭ガラ等が使用される。上記骨
材は通常混合物の全固形分に対して５〜１５重量％程度
混合される。[Aggregate] In addition to the cement-based inorganic powder and the wood reinforcing material, an aggregate, particularly a lightweight aggregate, may be mixed in the present invention. Examples of the aggregate include quartz sand,
Silica powder and the like are used, and as the lightweight aggregate, pearlite, shirasu balloon, expanded shale, expanded clay, calcined diatomaceous earth, fly ash, coal ash and the like are used. The above aggregate is usually mixed in an amount of about 5 to 15% by weight based on the total solid content of the mixture.
【０００９】〔第三成分〕上記混合物には、所望なれば
更に硫酸アルミニウム、硫酸マグネシウム、アルミン酸
塩類、水ガラス等の硬化促進剤やロウ、ワックス、パラ
フィン、界面活性剤、シリコン等の防水剤や撥水剤等が
混合されてもよい。[Third component] If necessary, the mixture may further contain a hardening accelerator such as aluminum sulfate, magnesium sulfate, aluminates, water glass, or a waterproofing agent such as wax, wax, paraffin, surfactant, or silicone. Or a water repellent may be mixed.
【００１０】〔蟻酸アルカリ土類金属塩〕本発明におい
ては、上記混合物に対して蟻酸アルカリ土類金属塩が添
加される。該蟻酸アルカリ土類金属塩は未反応セメント
クリンカーと水との反応、即ち硬化反応を速やかに進行
させることがで出来、また該セメントクリンカーと該水
との反応時に通常の石膏型エトリンガイトが生成しない
ため、得られる木質セメント板を二次、三次養生前、一
次養生後に製品寸法に裁断しても以後の工程で寸法変化
が殆ど起らない。[Alkaline earth metal formate] In the present invention, an alkaline earth metal formate is added to the above mixture. The alkaline earth metal formate can cause the reaction between the unreacted cement clinker and water, that is, the curing reaction to proceed promptly, and the normal gypsum ettringite does not form during the reaction between the cement clinker and the water. Therefore, even if the obtained wood cement board is cut into product dimensions before the secondary and tertiary curing and after the primary curing, there is almost no dimensional change in the subsequent steps.
【００１１】このように、本発明に使用する蟻酸アルカ
リ土類金属塩は効率良くセメントの硬化を促進するの
で、特にセメント硬化阻害物質を溶出する樹種を含む木
質補強材を使用した木質セメント板の製造において優れ
た硬化促進作用を発揮する。As described above, since the alkaline earth metal formate used in the present invention efficiently promotes the hardening of cement, it is particularly useful for a wood cement board using a wood reinforcing material containing a tree species that elutes a cement hardening inhibitor. Exhibits an excellent curing acceleration effect in production.
【００１２】上記蟻酸アルカリ土類金属塩の中でも、入
手容易性や上記硬化促進作用の面から蟻酸カルシウムを
使用するのが望ましい。また、該蟻酸アルカリ土類金属
塩は、上記混合物への分散性および均一性の点から水溶
液として使用するのが望ましい。該蟻酸アルカリ土類金
属塩は、該セメント系無機粉体１００重量部に対して固
形分として０．５〜４重量部添加するのが望ましい。Among the above alkaline earth metal formate salts, it is desirable to use calcium formate from the viewpoints of availability and the above-mentioned effect of accelerating hardening. The alkaline earth metal formate is desirably used as an aqueous solution from the viewpoint of dispersibility and uniformity in the mixture. It is desirable to add 0.5 to 4 parts by weight of the alkaline earth metal formate as a solid content to 100 parts by weight of the cement-based inorganic powder.
【００１３】〔木質セメント板の製造〕本発明において
は、半乾式法又は乾式法によって木質セメント板を製造
する。半乾式法の場合、まず、上記セメント系無機粉体
および木質補強材、そして所望により骨材、第三成分を
含有する混合物に、蟻酸アルカリ土類金属塩および水を
添加混合し、得られた成形材料を基板上に散布してマッ
トをフォーミングする。水は、該マットの水分含有率が
１５〜５０重量％となるように添加するのが好ましい。
蟻酸アルカリ土類金属塩と水との添加順序は特に限定さ
れないが、両者をほぼ同時に添加するのが好ましい。上
述した通り、該蟻酸アルカリ土類金属塩は水溶液として
添加するのが好ましく、また蟻酸アルカリ土類金属塩を
上記添加用の水に溶解させ、両者を一体的に添加しても
よい。[Manufacture of Wood Cement Board] In the present invention, a wood cement board is manufactured by a semi-dry method or a dry method. In the case of the semi-dry method, first, the mixture containing the cement-based inorganic powder and the wood reinforcing material, and, if desired, the aggregate and the third component, was added and mixed with an alkaline earth metal formate and water, and the mixture was obtained. The molding material is sprayed on the substrate to form the mat. Water is preferably added so that the moisture content of the mat is 15 to 50% by weight.
The order of addition of the alkaline earth metal formate and water is not particularly limited, but it is preferable to add both at substantially the same time. As described above, the alkaline earth metal formate is preferably added as an aqueous solution. Alternatively, the alkaline earth metal formate may be dissolved in the above-mentioned water for addition, and both may be added integrally.
【００１４】乾式法の場合、まず、上記セメント系無機
粉体および木質補強材、そして所望により骨材、第三成
分を含有する混合物に、蟻酸アルカリ土類金属塩の水溶
液（蟻酸アルカリ土類金属塩＋水）を添加混合し、得ら
れた成形材料を基板上に散布してマットをフォーミング
し、該マットに更に水を添加する。更に添加する水は、
該マットの水分含有率が１５〜５０重量％となるように
添加するのが好ましい。In the case of the dry method, first, an aqueous solution of an alkaline earth metal formate (an alkaline earth metal formate) is added to a mixture containing the cement-based inorganic powder, the wood reinforcing material, and, if desired, an aggregate and a third component. The resultant molding material is sprayed on a substrate to form a mat, and water is further added to the mat. Further added water is
It is preferable to add the mat so that the moisture content of the mat is 15 to 50% by weight.
【００１５】以上のようにしてマットがフォーミングさ
れたら、該マットを基板とともに圧締して加熱状態下で
一次養生する。該一次養生において適用される温度は通
常５０〜１００℃であり、圧締圧は通常２〜５MPa であ
る。本発明では該マット中のセメントの硬化促進剤とし
て、上記蟻酸アルカリ土類金属塩が使用されるので、上
記一次養生中該蟻酸アルカリ土類金属塩によって通常の
石膏型エトリンガイトの生成が抑制される。したがって
上記一次養生後、得られた一次養生品（半硬化板）は脱
型した上で製品寸法に裁断することが容易となる。裁断
後は常温養生又はオートクレーブ養生等の二次、三次養
生を行なう。常温養生は、通常常温で２〜４日間行わ
れ、オートクレーブ養生は、通常８５％RH以上の湿度、
１５０〜１８０℃の温度で８〜１８時間行われる。常温
養生又はオートクレーブ養生後は、乾燥工程を経て表面
処理を行い製品とする。上記したように本発明では蟻酸
アルカリ土類金属塩によってマット中のエトリンガイト
の生成が抑制されているので、上記二次、三次養生中あ
るいは乾燥工程中に半硬化板の寸法変化が殆ど起らな
い。When the mat is formed as described above, the mat is pressed together with the substrate and primary cured under a heated condition. The temperature applied in the primary curing is usually 50 to 100 ° C., and the pressing pressure is usually 2 to 5 MPa. In the present invention, since the alkaline earth metal formate is used as a hardening accelerator for cement in the mat, the formation of ordinary gypsum ettringite is suppressed by the alkaline earth metal formate during the primary curing. . Therefore, after the primary curing, the obtained primary cured product (semi-cured plate) can be easily removed and then cut into product dimensions. After cutting, secondary and tertiary curing such as room temperature curing or autoclave curing is performed. Room temperature curing is usually performed at room temperature for 2 to 4 days, and autoclave curing is usually performed at a humidity of 85% RH or more.
It is performed at a temperature of 150 to 180 ° C. for 8 to 18 hours. After curing at room temperature or after curing in an autoclave, the product is subjected to a surface treatment through a drying step to obtain a product. As described above, in the present invention, since the formation of ettringite in the mat is suppressed by the alkaline earth metal formate, the dimensional change of the semi-cured plate hardly occurs during the secondary or tertiary curing or during the drying step. .
【００１６】木質セメント板表面に凹凸模様を付する場
合には、該基板の型面に該凹凸模様に対応した凹凸模様
を形成しておけばよい。また、表面に凹凸模様のない平
滑な木質セメント板を製造する場合には、基板として直
接搬送板を使用してもよい。When an uneven pattern is provided on the surface of the wood cement board, an uneven pattern corresponding to the uneven pattern may be formed on the mold surface of the substrate. In the case of producing a smooth wood cement board having no uneven pattern on the surface, a direct transport board may be used as a substrate.
【００１７】以上説明した本発明の方法によって、二層
構造又は三層構造の木質セメント板を製造することも出
来る。二層構造の場合には、まず粒子径の細かい木質補
強材を混合した成形材料を基板上に散布し、次いでその
上に粒子径の大きい木質補強材を混合した成形材料を散
布して二層構造のマットをフォーミングし、該マットを
圧締・加熱して上記粒子径の細かい木質補強材を混合し
た成形材料によって緻密構造の表層部を形成し、上記粒
子径の大きい木質補強材を混合した成形材料によって粗
構造の裏層部を形成する。According to the method of the present invention described above, a two-layer or three-layer wood cement board can be produced. In the case of a two-layer structure, first, a molding material mixed with a fine-grained wood reinforcing material is sprayed on a substrate, and then a molding material mixed with a large-grained wood reinforcing material is sprayed thereon to form a two-layer structure. Forming a mat having a structure, pressing and heating the mat, forming a surface layer portion of a dense structure with a molding material obtained by mixing the wood reinforcing material having a fine particle diameter, and mixing the wood reinforcing material having a large particle diameter. A back layer having a rough structure is formed by a molding material.
【００１８】三層構造の場合には、上記粒子径の大きい
木質補強材を混合した成形材料の上に更に粒子径の細か
い木質補強材を混合した成形材料を散布して三層構造の
マットをフォーミングし、該マットを圧締・加熱して上
記粒子径の大きい木質補強材を混合した成形材料からな
る層を芯層部とし、その上下の粒子径の細かい木質補強
材を混合した成形材料からなる層を表裏層部とする。ま
た、上記二層構造のマットを、粒子径の大きい木質補強
材を混合した成形材料からなる層相互が接触するように
二枚積層して圧締・加熱してもよい。In the case of a three-layer structure, a matting material having a finer particle diameter is further dispersed on a molding material having a wood reinforcing material having a larger particle diameter mixed thereon to form a mat having a three-layer structure. Forming, pressing and heating the mat to form a core layer composed of a mixture of the above-mentioned wood reinforcing material having a large particle diameter as a core layer portion, and forming a layer of the wood reinforcing material having a fine particle diameter above and below the core. These layers are referred to as front and back layers. Alternatively, two mats having the above-described two-layer structure may be laminated and pressed and heated so that layers made of a molding material mixed with a wood reinforcing material having a large particle diameter are in contact with each other.
【００１９】〔実施例１〜３，比較例１〜４〕表１に示
す組成の混合物に対して、水分含有量が４５重量％にな
るように水を添加し、攪拌して均一化した。得られた成
形材料を搬送板上に散布してマットをフォーミングし、
該マットを該搬送板とともに圧締し、５０℃で１２時間
一次養生せしめた。その後圧締状態を解き一次試験片
（縦７cm×横２０cm×厚さ１．２cm）を切出した。該一
次試験片を更に常温で４日間自然養生し、最後に８０℃
で６時間乾燥させて最終試験片を得た。なお、表１中の
セメントとしてはポルトランドセメントを使用し、木片
としてはセメント硬化阻害物質を多量に含むヒノキの辺
材を使用した。Examples 1 to 3 and Comparative Examples 1 to 4 Water was added to a mixture having the composition shown in Table 1 so that the water content became 45% by weight, and the mixture was stirred to homogenize. Spread the obtained molding material on the carrier plate to form a mat,
The mat was pressed together with the carrier plate and primary cured at 50 ° C. for 12 hours. Thereafter, the pressed state was released and a primary test piece (7 cm long × 20 cm wide × 1.2 cm thick) was cut out. The primary test piece was further naturally cured at room temperature for 4 days.
For 6 hours to obtain a final test piece. Note that Portland cement was used as the cement in Table 1, and cypress sapwood containing a large amount of a cement hardening inhibitor was used as the wood chip.
【００２０】[0020]
【表１】 [Table 1]
【００２１】上記一次試験片と最終試験片との寸法変化
およびスパン１５cmとして曲げ強度を測定した。結果を
表２に示す。The dimensional change between the primary test piece and the final test piece and the bending strength were measured with a span of 15 cm. Table 2 shows the results.
【００２２】[0022]
【表２】 [Table 2]
【００２３】表２に示すように、蟻酸カルシウムを使用
して製造した実施例１〜３の木質セメント板は、比較例
１〜４の木質セメント板と比較して寸法変化が改善さ
れ、特に比較例３と比較して非常に高い曲げ強度を有す
る。As shown in Table 2, the wood cement boards of Examples 1 to 3 manufactured using calcium formate have improved dimensional changes as compared with the wood cement boards of Comparative Examples 1 to 4, especially It has a very high bending strength compared to Example 3.
【００２４】[0024]
【発明の効果】本発明の方法によれば、速やかにセメン
トを硬化させることができるとともに、通常の石膏型エ
トリンガイトの生成を防止することができるため、マッ
トを一次養生後の半硬化板の硬度が高くならない状態で
製品寸法に裁断することが出来、切断刃の摩耗、損傷を
防いで長持ちさせることが出来、そして強度の高い木質
セメント板を効率良く製造することができる。また、本
発明の方法では、硬化促進剤として蟻酸アルカリ土類金
属塩を使用するため、塩化物に起因する錆・腐食、人体
に対する悪影響、ダイオキシン等の問題もない。According to the method of the present invention, the cement can be quickly cured and the production of ordinary gypsum-type ettringite can be prevented. Can be cut to a product size without increasing the height, the cutting blade can be prevented from abrasion and damage, can be prolonged, and a high-strength wood cement board can be manufactured efficiently. Further, in the method of the present invention, since alkaline earth metal formate is used as a curing accelerator, there are no problems such as rust and corrosion caused by chloride, adverse effects on human bodies, and dioxins.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｃ０４Ｂ 111:10 Ｃ０４Ｂ 111:10 (58)調査した分野(Int.Cl.7，ＤＢ名) C04B 2/00 - 32/02 ──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. 7 identification code FI C04B 111: 10 C04B 111: 10 (58) Field surveyed (Int.Cl. 7 , DB name) C04B 2/00-32/02
Claims (4)
有する混合物に蟻酸アルカリ土類金属塩および水を添加
混合した成形材料を基板上に散布してマットをフォーミ
ングし、該マットを圧締して一次養生し、該一次養生後
の半硬化板を製品寸法に裁断した後に常温養生又はオー
トクレーブ養生することを特徴とする木質セメント板の
製造方法。1. A molding material obtained by adding and mixing an alkaline earth metal formate and water to a mixture containing a cement-based inorganic powder and a wood reinforcing material is sprayed on a substrate to form a mat, and the mat is pressed. A method for producing a wood cement board, comprising: tightening and primary curing; cutting the semi-cured board after the primary curing into product dimensions; and then curing at room temperature or in an autoclave.
て添加混合する請求項１記載の木質セメント板の製造方
法。2. The method for producing a wood cement board according to claim 1, wherein said alkaline earth metal formate is added and mixed as an aqueous solution.
ウムである請求項１又は２記載の木質セメント板の製造
方法。3. The method for producing a wood cement board according to claim 1, wherein the alkaline earth metal formate is calcium formate.
を多量に含む樹種が含まれる請求項１〜３のいずれかに
記載の木質セメント板の製造方法。4. The method for producing a wood cement board according to claim 1, wherein said wood reinforcing material includes a tree species containing a large amount of a cement hardening inhibitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30951899A JP3211204B2 (en) | 1999-10-29 | 1999-10-29 | Wood cement board manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30951899A JP3211204B2 (en) | 1999-10-29 | 1999-10-29 | Wood cement board manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001130940A JP2001130940A (en) | 2001-05-15 |
| JP3211204B2 true JP3211204B2 (en) | 2001-09-25 |
Family
ID=17993981
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30951899A Expired - Fee Related JP3211204B2 (en) | 1999-10-29 | 1999-10-29 | Wood cement board manufacturing method |
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| Country | Link |
|---|---|
| JP (1) | JP3211204B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20230074162A (en) | 2020-09-18 | 2023-05-26 | 고쿠리츠겐큐카이하츠호진 가이죠·고완·고쿠기쥬츠겐큐죠 | Ship construction simulation method, construction simulation program, and construction simulation system |
| KR20230104644A (en) | 2020-11-12 | 2023-07-10 | 고쿠리츠겐큐카이하츠호진 가이죠·고완·고쿠기쥬츠겐큐죠 | Shipbuilding simulation method based on unified database, construction simulation program and construction simulation system, and construction method of ship quality database |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003327457A (en) * | 2001-11-05 | 2003-11-19 | Sekisui Chem Co Ltd | Substitution for portland cement, production method thereof, hard block cement board obtained by using the same and production method thereof |
| ATE375970T1 (en) * | 2004-03-19 | 2007-11-15 | James Hardie Int Finance Bv | MULTI-MODE ACCELERATOR FOR CEMENT MATERIALS |
| US9016090B2 (en) | 2013-06-12 | 2015-04-28 | Hamid Hojaji | Glass microspheres comprising sulfide, and methods of producing glass microspheres |
| US10196296B2 (en) | 2015-01-17 | 2019-02-05 | Hamid Hojaji | Fluid permeable and vacuumed insulating microspheres and methods of producing the same |
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1999
- 1999-10-29 JP JP30951899A patent/JP3211204B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20230074162A (en) | 2020-09-18 | 2023-05-26 | 고쿠리츠겐큐카이하츠호진 가이죠·고완·고쿠기쥬츠겐큐죠 | Ship construction simulation method, construction simulation program, and construction simulation system |
| KR20230104644A (en) | 2020-11-12 | 2023-07-10 | 고쿠리츠겐큐카이하츠호진 가이죠·고완·고쿠기쥬츠겐큐죠 | Shipbuilding simulation method based on unified database, construction simulation program and construction simulation system, and construction method of ship quality database |
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| Publication number | Publication date |
|---|---|
| JP2001130940A (en) | 2001-05-15 |
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