JPH0755853B2 - Method for manufacturing wood-based inorganic board - Google Patents
Method for manufacturing wood-based inorganic boardInfo
- Publication number
- JPH0755853B2 JPH0755853B2 JP63176984A JP17698488A JPH0755853B2 JP H0755853 B2 JPH0755853 B2 JP H0755853B2 JP 63176984 A JP63176984 A JP 63176984A JP 17698488 A JP17698488 A JP 17698488A JP H0755853 B2 JPH0755853 B2 JP H0755853B2
- Authority
- JP
- Japan
- Prior art keywords
- wood
- hydraulic binder
- weight
- inorganic
- raw material
- 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
- C04B28/04—Portland cements
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、寸法安定性に優れた木質系無機質板の製造方
法に関する。TECHNICAL FIELD The present invention relates to a method for producing a wood-based inorganic board having excellent dimensional stability.
［従来の技術・課題］ 木質原料を無機質水硬性結合材で結合した木質系無機質
板は建築分野において広く利用されている。木質系無機
質板の特徴は防火性、釘やネジの保持力に優れているこ
とであるが、一方、最大の欠点として吸放水に伴う寸法
安定性の悪さが指摘されている。寸法安定性が悪いと、
変形あるいは亀裂発生の原因となるため、寸法安定性の
向上は木質系無機質板の品質改良において最も重要な課
題である。[Conventional Technology / Problem] A wood-based inorganic board in which wood raw materials are bonded with an inorganic hydraulic binder is widely used in the field of construction. The characteristics of the wood-based inorganic board are that it is excellent in fire resistance and the holding power for nails and screws, but on the other hand, it has been pointed out that the dimensional stability associated with water absorption and release is the greatest drawback. If the dimensional stability is poor,
Improving the dimensional stability is the most important issue in improving the quality of the wood-based inorganic board because it causes deformation or cracking.
そのための方策として、木質系無機質板中で最も広く用
いられている木質セメント板においては、硬化・脱板後
オートクレーブ養生を行なうことにより寸法安定性を高
めることが提唱されている（特開昭60−86060号公
報）。オートクレーブ養生は珪酸カルシウム系材料の養
生法として広く用いられており、寸法安定性の向上も認
められているが、オートクレーブ養生を行なうには大掛
かりな装置が必要であり、また、木質原料の種類によっ
てはオートクレーブ養生を行なうことにより木質原料に
劣化を生じたり、マトリックスの反応に悪影響を与える
場合もあるため、木質セメメント板の寸法安定性向上の
ための技術としては必ずしも充分なものではない。As a measure for this, it has been proposed that the wood cement board, which is the most widely used among the wood-based inorganic boards, be subjected to autoclave curing after hardening and removing to improve the dimensional stability (Japanese Patent Laid-Open No. Sho 60). -86060). Autoclave curing is widely used as a method for curing calcium silicate-based materials, and it has been confirmed that dimensional stability is improved, but autoclave curing requires a large-scale device, and depending on the type of wood raw material. Is sometimes not sufficient as a technique for improving the dimensional stability of the wood cement plate, because the wood raw material may be deteriorated by the autoclave curing and the reaction of the matrix may be adversely affected.
また、寸法安定性は製品の嵩比重と密接に関連してお
り、配合内容が同一であれば嵩比重の高いものの方が嵩
比重の低いものよりも寸法安定性に優れることが知られ
ている。しかし、嵩比重が高くなると、加工性、施工性
の低下をもたらす。また、配合中に占める木質原料の比
率の低下させれば、寸法安定性が高くなることも知られ
ている。しかし、木質原料の配合比率を低下させると強
度、耐衝撃性等を低下してしまうという問題がある。従
って、これらの方法では木質系無機質板の寸法安定性を
根本的に改善することはできない。In addition, dimensional stability is closely related to the bulk specific gravity of the product, and it is known that the one having a higher bulk specific gravity has a better dimensional stability than the one having a lower bulk specific gravity if the content of the mixture is the same. . However, when the bulk density is high, the workability and workability are deteriorated. It is also known that the dimensional stability increases when the ratio of the wood raw material in the blend is reduced. However, when the blending ratio of the wood raw material is lowered, there is a problem that strength, impact resistance and the like are lowered. Therefore, these methods cannot fundamentally improve the dimensional stability of the wood-based inorganic board.
［課題を解決するための手段］ 本発明者らは従来の製造設備で製造が可能であり、且つ
寸法安定性に優れた木質系無機質板の開発を目的として
研究に着手した。そして種々の原料系について鋭意研究
した結果、係る課題を解決できることを見出し、本発明
を完成するに至った。[Means for Solving the Problems] The present inventors set out to develop a wood-based inorganic board that can be manufactured with conventional manufacturing equipment and is excellent in dimensional stability. As a result of earnest research on various raw material systems, they found that such problems can be solved, and completed the present invention.
即ち、本発明は木質原料、無機質水硬性結合材、前記木
質原料及び無機質水硬性結合材の合計量100重量部に対
してウォラストナイトまたはマイカまたはそれら両者／
炭酸カルシウムまたはパーライトまたはそれら両者の混
合比が重量を基準として2/8〜8/2である混合物2.5〜68
重量部、及び水を混練し、得られた混練物を成形し、次
いで養生することにより無機質水硬性結合材を硬化させ
ることを特徴とする木質系無機質板の製造方法に係る。That is, the present invention is a wood raw material, an inorganic hydraulic binder, wollastonite or mica or both of them based on 100 parts by weight of the total amount of the wood raw material and the inorganic hydraulic binder.
A mixture 2.5-68 in which the mixing ratio of calcium carbonate or perlite or both is 2 / 8-8 / 2 by weight
The present invention relates to a method for producing a wood-based inorganic board, which comprises kneading parts by weight and water, molding the obtained kneaded product, and then curing the resulting material to cure the inorganic hydraulic binder.
［作用］ 本発明は木質原料及び無機質水硬性結合材の従来の原料
に前記木質原料及び無機質水硬性結合材の合計量100重
量部に対してウォラストナイトまたはマイカまたはそれ
ら両者／炭酸カルシウムまたはパーライトまたはそれら
両者の混合比が重量を基準として2/8〜8/2である混合物
2.5〜68重量部、望ましくは7.5〜50重量部を水加するこ
とを特徴とし、これに無機質水硬性結合材を硬化させる
のに必要且つ充分な水を添加し、混練、成形、養生硬化
を行なうことにより木質系無機質板を製造することから
なる。[Operation] In the present invention, wollastonite and / or mica or both thereof / calcium carbonate or perlite are added to the conventional raw materials of the wood raw material and the inorganic hydraulic binder to 100 parts by weight of the total amount of the wood raw material and the inorganic hydraulic binder. Or a mixture in which the mixing ratio of both is 2/8 to 8/2 based on weight
It is characterized by adding 2.5 to 68 parts by weight, preferably 7.5 to 50 parts by weight, to which is added sufficient and sufficient water to cure the inorganic hydraulic binder, and kneading, molding, curing and curing are performed. It comprises producing a wood-based inorganic board by carrying out.
本発明において、木質原料としては従来の木質系無機質
板に用いられる木材細片をそのまま用いることができ
る。また、無機質水硬性結合材としては種々の無機質水
硬性結合材が使用されているが、このうち特に各種セメ
ント、水硬性石膏を用いることが好ましい。木質原料と
無機質水硬性結合材の配合比率は重量比で1/20〜1/1の
範囲まで適用が可能である。ただし、水を除く全原料に
占める無機質水硬性結合材の割合が重量比で40％を下回
らない範囲が好ましい。In the present invention, the wood flakes used for the conventional wood-based inorganic board can be used as they are as the wood raw material. As the inorganic hydraulic binder, various inorganic hydraulic binders are used, and among these, various cements and hydraulic gypsums are particularly preferable. The blending ratio of the wood raw material and the inorganic hydraulic binder can be applied within the range of 1/20 to 1/1 by weight. However, it is preferable that the proportion of the inorganic hydraulic binder in all the raw materials excluding water does not fall below 40% by weight.
本発明に使用するウォラストナイトは性能とコストの面
から天然β−ウォラストナイトが望ましい。また、マイ
カにはマスコバイト、パラゴナイト、バイオタイト等の
種類があるが、本発明にはいずれのマイカも使用するこ
とができる。ウォラストナイト及びマイカの粒度として
はふるい分けで10メッシュ（目開き1.68mm）よりも細か
いものが望ましい。As the wollastonite used in the present invention, natural β-wollastonite is preferable in terms of performance and cost. There are various types of mica such as muscovite, paragonite, and biotite, and any mica can be used in the present invention. The particle size of wollastonite and mica is preferably finer than 10 mesh (opening 1.68 mm) by sieving.
また、本発明においては、ウォラストナイト及び／また
はマイカと、炭酸カルシウム及び／またはパーライトを
使用する。炭酸カルシウム及び／またはパーライトの選
択は目的とする製品の比重により適宜行なうことができ
る。ウォラストナイト及び／またはマイカと炭酸カルシ
ウム及び／またはパーライトの混合比は重量を基準とし
て2/8〜8/2の範囲が望ましい。該混合比が2/8よりも小
さくなる。即ち、ウォラストナイト及び／またはマイカ
の配合量が少なくなると、充分な寸法安定性の改善を達
成することができず、また、該混合比が8/2よりも大き
くなる。即ちウォラストナイト及び／またはマイカの配
合量が多くなると、製品の耐凍結融解性能の低下を生ず
るために望ましくない。In the present invention, wollastonite and / or mica and calcium carbonate and / or perlite are used. The selection of calcium carbonate and / or perlite can be appropriately made depending on the specific gravity of the intended product. The mixing ratio of wollastonite and / or mica to calcium carbonate and / or perlite is preferably in the range of 2/8 to 8/2 based on the weight. The mixing ratio becomes smaller than 2/8. That is, when the blending amount of wollastonite and / or mica is small, it is not possible to achieve a sufficient improvement in dimensional stability, and the mixing ratio becomes larger than 8/2. That is, if the amount of wollastonite and / or mica is increased, the freeze-thaw resistance of the product is deteriorated, which is not desirable.
このような範囲の混合比をもつ混合物を前記木質原料と
無機質水硬性結合材の合計配合量100重量部に対し、2.5
〜68重量部、望ましくは7.5〜50重量部配合する。上述
の混合物の配合量が2.5重量部未満であると、充分な寸
法安定性の向上を得ることができず、また、該配合量が
68重量部を超えると製品強度の低下を生ずるために好ま
しくない。A mixture having a mixing ratio within such a range is used in an amount of 2.5 parts by weight per 100 parts by weight of the total amount of the wood raw material and the inorganic hydraulic binder.
˜68 parts by weight, preferably 7.5 to 50 parts by weight. If the blending amount of the above-mentioned mixture is less than 2.5 parts by weight, sufficient improvement in dimensional stability cannot be obtained, and the blending amount is
If it exceeds 68 parts by weight, the strength of the product is deteriorated, which is not preferable.
なお、本発明において、ウォラストナイト及び／または
マイカ並びに炭酸カルシウム及び／またはパーライトを
他の原料と混合する際の混合順序は問わない。即ち、 木質原料と無機質水硬性結合材との混合に先立って、
ウォラストナイト及び／またはマイカ並びに炭酸カルシ
ウム及び／またはパーライトのうちの少なくとも１種を
木質原料と無機質水硬性結合材の少なくとも１種に予め
混合してておく； 木質原料と無機質水硬性結合材とを混合した後、ウォ
ラストナイト及び／またはマイカ並びに炭酸カルシウム
及び／またはパーライトを同時に添加する； 木質原料と無機質水硬性結合材とを混合した後、ウォ
ラストナイト及び／またはマイカ並びに炭酸カルシウム
及び／またはパーライトを混合する。In the present invention, the order of mixing wollastonite and / or mica, calcium carbonate and / or perlite with other raw materials is not limited. That is, prior to mixing the wood raw material and the inorganic hydraulic binder,
At least one of wollastonite and / or mica and calcium carbonate and / or perlite is premixed with at least one of a wood raw material and an inorganic hydraulic binder; a wood raw material and an inorganic hydraulic binder Wollastonite and / or mica and calcium carbonate and / or perlite are added simultaneously; after mixing the wood raw material and the inorganic hydraulic binder, wollastonite and / or mica and calcium carbonate and / or Or mix perlite.
また、水の添加、混合の方法及び順序については従来の
木質系無機質板の製造において公知のいずれの方法を用
いてもよい。As for the method and order of adding and mixing water, any known method in the conventional production of wood-based inorganic boards may be used.
なお、上記本発明の構成材料に、必要に応じてシリカヒ
ュームや珪藻土等の無機質微粉末、ベントナイトやカオ
リンやバーミキュライト等の粘土鉱物、パリゴルスカイ
トやセピオライト等の繊維質鉱物、ゼオライト等の多孔
質鉱物粉末、合成樹脂エマルジョン、着色剤、防水剤並
びに硬化促進剤ないし硬化遅延剤等の添加物を得られる
木質系無機質板の物性や成形性に悪影響を及ぼさない範
囲で添加してもよい。なお、これらの成分の添加配合量
は水を除く全原料中に占める無機質水硬性結合材の割合
が重量比で40％を下回らない範囲が好ましい。Incidentally, in the constituent material of the present invention, if necessary, inorganic fine powder such as silica fume and diatomaceous earth, clay minerals such as bentonite, kaolin and vermiculite, fibrous minerals such as palygorskite and sepiolite, porous mineral powder such as zeolite. , Synthetic resin emulsions, colorants, waterproofing agents, and additives such as curing accelerators or curing retarders may be added within a range that does not adversely affect the physical properties and moldability of the wood-based inorganic board. The amount of these components added and compounded is preferably in a range such that the proportion of the inorganic hydraulic binder in all the raw materials except water does not fall below 40% by weight.
［実 施 例］ 実施例 下記に示す原料を用い、本発明品及び比較品を得た。[Examples] Examples Inventive products and comparative products were obtained using the raw materials shown below.
◎原料 （１）木質原料 パルマン社製フレーカーを用いて加工したスギの木材細
片 （２）無機質水硬性結合材 （イ）小野田セメント（株）製普通ポルトランドセメン
ト （ロ）神島化学工業（株）製半水石膏 （３）ウォラストナイト インド産Kemolit A−60 （４）マイカ カナダ産SuzoriteマイカＳ−60 （５）炭酸カルシウム粉末 足立石灰工業（株）製 （６）パーライト 三井金属パーライト（株）製FW （７）珪藻土 日鉄鉱ダイアトン（株）製 ◎製造方法 第１表に記載する本発明品及び比較品とも水／固形原料
＝60/100（重量比）の水を添加し、混練して混練物を得
た。得られた混練物を鉄板上で均一なマット状とし、試
験体の嵩比重が1.0となるようにプレス圧縮し、ターン
バックルで鉄板を固定した後、プレス機から取り外し、
圧縮したままの状態で24時間養生を行なった。次に、タ
ーンバックルを取り外し、鉄板を脱板した後、水硬性結
合材として普通ポルトランドセメントを使用した場合に
は更に２週間養生を行ない、一方、水硬性結合材として
半水石膏を使用した場合は45℃で24時間乾燥して供試体
とした。◎ Raw materials (1) Wood raw materials Wood chips of cedar processed using a flanker made by Palman (2) Inorganic hydraulic binder (a) Onoda Cement Co., Ltd. ordinary Portland cement (b) Kamijima Chemical Co., Ltd. Hemihydrate gypsum (3) Wollastonite Kemolit A-60 from India (4) Mica Suzorite Mica S-60 from Canada (5) Calcium carbonate powder Adachi Lime Industries Co., Ltd. (6) Perlite Mitsui Kinzoku Perlite Co., Ltd. Manufactured by FW (7) Diatomite Nittonite Diaton Co., Ltd. ◎ Manufacturing method Both the product of the present invention and the comparative product shown in Table 1 were added with water / solid raw material = 60/100 (weight ratio) and kneaded. A kneaded product was obtained. The obtained kneaded product is formed into a uniform mat on an iron plate, press-compressed so that the bulk specific gravity of the test piece is 1.0, the iron plate is fixed with a turnbuckle, and then removed from the press machine,
Curing was carried out for 24 hours in the compressed state. Next, after removing the turnbuckle and removing the iron plate, if ordinary Portland cement was used as the hydraulic binder, curing was continued for 2 more weeks, while hemihydrate gypsum was used as the hydraulic binder. Was dried at 45 ° C. for 24 hours to give a sample.
◎試験 得られたそれぞれの供試体の嵩比重、曲げ強度、吸水寸
法変化率、耐凍結融解性能を測定した。結果を第１表に
示す。◎ Test The bulk specific gravity, bending strength, water absorption dimensional change rate, and freeze-thaw resistance of each of the obtained test pieces were measured. The results are shown in Table 1.
（１）嵩比重 JIS A 5417 7.4による。ただし、無機質水硬性結合材と
して半水石膏を用いた場合は乾燥温度を45℃とした。(1) Bulk specific gravity According to JIS A 5417 7.4. However, when hemihydrate gypsum was used as the inorganic hydraulic binder, the drying temperature was 45 ° C.
（２）曲げ強度 無機質水硬性結合材として普通ポルトランドセメントを
使用した場合は、供試体を105℃で24時間乾燥し、一
方、無機質水硬性結合材として半水石膏を使用した場合
は60℃で24時間乾燥した後、曲げ強度を求めた。なお、
曲げ強度を求める際の供試体の形状はJIS A 1408 5号試
験片とした。(2) Bending strength When ordinary Portland cement was used as the inorganic hydraulic binder, the specimen was dried at 105 ° C for 24 hours, while at 60 ° C when hemihydrate gypsum was used as the inorganic hydraulic binder. After drying for 24 hours, flexural strength was determined. In addition,
The JIS A 1408 No. 5 test piece was used as the shape of the test piece when determining the bending strength.
（３）吸水寸法変化率 JIS A 5422 6.4の吸水による長さ変以試験に準じ、下記
の条件にて測定を行った。(3) Water absorption dimensional change rate The measurement was performed under the following conditions in accordance with the length change test by water absorption of JIS A 5422 6.4.
乾燥条件 無機質水硬性結合材として普通ポルトランドセメントを
使用した場合:105℃で24時間。 Drying conditions When ordinary Portland cement is used as the inorganic hydraulic binder: 105 ° C for 24 hours.
無機質水硬性結合材として半水石膏を使用した場合:60
℃で24時間。When hemihydrate gypsum is used as the inorganic hydraulic binder: 60
24 hours at ℃.
◎耐凍結融解性能 無機質水硬性結合材が普通ポルトランドセメントの場
合:ASTM C666 A法による水中凍結融解法。◎ Freezing and thawing resistance When the inorganic hydraulic binder is ordinary Portland cement: Freezing and thawing method in water according to ASTM C666 A method.
無機質水硬性結合材が半水石膏の場合：気中凍結融解
法。When the inorganic hydraulic binder is hemihydrate gypsum: freeze-thaw method in air.
いずれも100サイクル経過後の目視観察によるものであ
る。All are based on visual observation after 100 cycles.
第１表中 ◎は外観上はほとんど劣化が認められない； 〇は外観上の劣化は認められないが、その程度は軽微で
ある； △は外観上中程度の劣化が認められる； ×は外観上著しい劣化が認められる。In Table 1, ⊚ shows almost no deterioration in appearance; ◯ shows no deterioration in appearance, but the degree is slight; △ shows moderate deterioration in appearance; × shows appearance Significant deterioration is observed.
［発明の効果］ 本発明方法により製造された木質系無機質板は曲げ強
度、吸水寸法変化率、耐凍結融解性能とも良好な結果を
示し、従来の木質系無機質板の欠点を解消することがで
きるものである。 [Effects of the Invention] The wood-based inorganic board manufactured by the method of the present invention shows good results in bending strength, water absorption dimensional change rate, and freeze-thaw resistance, and can eliminate the drawbacks of conventional wood-based inorganic boards. It is a thing.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０４Ｂ 18/26 28/14 // Ｃ０４Ｂ 111:30 (56)参考文献 特開 昭60−226440（ＪＰ，Ａ) 特開 昭60−226439（ＪＰ，Ａ) 特公 昭61−4784（ＪＰ，Ｂ２)─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification number Office reference number FI technical display location C04B 18/26 28/14 // C04B 111: 30 (56) References JP-A-60-226440 ( JP, A) JP 60-226439 (JP, A) JP 61-4784 (JP, B2)
Claims (1)
原料及び無機質水硬性結合材の合計量100重量部に対し
てウォラストナイトまたはマイカまたはそれら両者／炭
酸カルシウムまたはパーライトまたはそれら両者の混合
比が重量を基準として2/8〜8/2である混合物2.5〜68重
量部、及び水を混練し、得られた混練物を成形し、次い
で養生することにより無機質水硬性結合材を硬化させる
ことを特徴とする木質系無機質板の製造方法。1. A wood raw material, an inorganic hydraulic binder, and wollastonite or mica or both / calcium carbonate or perlite or a mixture of both based on 100 parts by weight of the total amount of the wood raw material and the inorganic hydraulic binder. 2.5 to 68 parts by weight of a mixture having a ratio of 2/8 to 8/2 based on weight and water are kneaded, the resulting kneaded product is molded, and then cured to cure the inorganic hydraulic binder. A method for producing a wood-based inorganic board characterized by the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63176984A JPH0755853B2 (en) | 1988-07-18 | 1988-07-18 | Method for manufacturing wood-based inorganic board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63176984A JPH0755853B2 (en) | 1988-07-18 | 1988-07-18 | Method for manufacturing wood-based inorganic board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02141446A JPH02141446A (en) | 1990-05-30 |
| JPH0755853B2 true JPH0755853B2 (en) | 1995-06-14 |
Family
ID=16023148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63176984A Expired - Fee Related JPH0755853B2 (en) | 1988-07-18 | 1988-07-18 | Method for manufacturing wood-based inorganic board |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0755853B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2754306B2 (en) * | 1992-10-09 | 1998-05-20 | ニチハ株式会社 | Wood cement board |
| JP2943844B2 (en) * | 1994-08-26 | 1999-08-30 | ニチハ株式会社 | Wood cement board |
| JP3549790B2 (en) * | 1999-11-30 | 2004-08-04 | ニチハ株式会社 | Inorganic plate and method for producing the same |
| LU90627B1 (en) * | 2000-08-09 | 2002-02-12 | Heribert Hoehn | Process for making concrete or mortar with a vegetable additive |
| JP2002166406A (en) * | 2000-12-01 | 2002-06-11 | Nichiha Corp | Method for manufacturing woody cement board |
| JP5214849B2 (en) * | 2005-10-27 | 2013-06-19 | 学校法人日本大学 | Wooden plasterboard |
| JP5634895B2 (en) * | 2011-01-26 | 2014-12-03 | 電気化学工業株式会社 | Composition for building material and method for producing carbonated building material |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60226439A (en) * | 1984-04-26 | 1985-11-11 | 旭化成株式会社 | Lightweight excelsior cement composition |
| JPS60226440A (en) * | 1984-04-26 | 1985-11-11 | 旭化成株式会社 | Excelsior cement composition for extrusion forming |
| JPS614784A (en) * | 1984-06-16 | 1986-01-10 | Sumitomo Metal Ind Ltd | Method for charging coke oven with raw coal |
-
1988
- 1988-07-18 JP JP63176984A patent/JPH0755853B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02141446A (en) | 1990-05-30 |
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