JP2515197B2 - Calcium silicate refractory coated board and its manufacturing method - Google Patents
Calcium silicate refractory coated board and its manufacturing methodInfo
- Publication number
- JP2515197B2 JP2515197B2 JP3313240A JP31324091A JP2515197B2 JP 2515197 B2 JP2515197 B2 JP 2515197B2 JP 3313240 A JP3313240 A JP 3313240A JP 31324091 A JP31324091 A JP 31324091A JP 2515197 B2 JP2515197 B2 JP 2515197B2
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- calcium silicate
- magnesium hydroxide
- slurry
- refractory coated
- 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
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
- C04B28/18—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 mixtures of the silica-lime type
- C04B28/186—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 mixtures of the silica-lime type containing formed Ca-silicates before the final hardening step
- C04B28/188—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 mixtures of the silica-lime type containing formed Ca-silicates before the final hardening step the Ca-silicates being present in the starting mixture
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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)
- Building Environments (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、けい酸カルシウム質の
耐火被覆板に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a calcium silicate refractory coated plate.
【０００２】[0002]
【従来の技術】鉄骨建築は法定の耐火構造とするために
その躯体の鉄骨表面を耐火性の断熱材で被覆することが
必要である。このために用いられる耐火性断熱材として
は、鉄骨表面に吹き付けて被覆層を形成させるものと板
状に成形されたものとがあり、それぞれ適所に使い分け
られている。板状に成形された耐火材としてはけい酸カ
ルシウム質耐火被覆板が代表的なものであって、耐火性
能と施工性がよいことを特長としている。2. Description of the Related Art In order to have a legal fireproof structure in a steel frame building, it is necessary to cover the steel frame surface of the frame with a fireproof heat insulating material. Fire-resistant heat insulating materials used for this purpose include those that are sprayed onto the surface of the steel frame to form a coating layer, and those that are formed into a plate shape, and are used appropriately in their respective places. A typical fireproof material formed into a plate is a calcium silicate fireproof coated board, which is characterized by good fireproof performance and workability.
【０００３】[0003]
【発明が解決しようとする課題】鉄骨建築における耐火
被覆は上述のように不可欠のものであるが、建物内の有
効空間を少しでも大きく取るためには、所定の耐火性能
を達成するのに必要な被覆層はなるべく薄くて済むこと
が望ましい。けい酸カルシウム質耐火被覆板について
も、現在は耐火１時間の耐火性を得るには２５mmの被覆
板厚さが必要であり、耐火２時間では３５mm、耐火３時
間では５０mmの厚さがそれぞれ必要であるが、この必要
厚さはより小さくすることが望まれている。そこで本発
明の目的は、同じ耐火時間を達成するのに必要なけい酸
カルシウム質耐火被覆板が従来よりも薄くて済むよう
に、該被覆板の耐火断熱性能を改良することにある。Although a fireproof coating in a steel building is indispensable as mentioned above, it is necessary to achieve a predetermined fireproof performance in order to make the effective space in the building as large as possible. It is desirable that the covering layer be as thin as possible. With regard to calcium silicate fire-resistant coated plates, a thickness of 25 mm is currently required to obtain fire resistance for 1 hour of fire resistance, 35 mm for fire resistant 2 hours, and 50 mm for fire resistant 3 hours. However, it is desired to make this required thickness smaller. Therefore, it is an object of the present invention to improve the fireproof heat insulating performance of the calcium silicate-based refractory coated plate, which is required to achieve the same fireproof time, so that it is thinner than before.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成すること
に成功した本発明は、トバモライトとゾノトライトの混
晶からなるマトリックス中に微粒子状水酸化マグネシウ
ムを含有することを特徴とするけい酸カルシウム質耐火
被覆板、ならびに、けい酸質原料、石灰質原料および水
からなるスラリー状混合物を加圧下に加熱してゾノトラ
イト結晶を主成分とするけい酸カルシウム水和物結晶の
スラリーを製造し、これにけい酸質原料、石灰質原料、
微粒子状水酸化マグネシウムおよび補強用無機繊維を混
合したのち板状に成形し、得られた板状成形物を加圧水
蒸気中トバモライト生成条件下で加熱したのち乾燥する
ことを特徴とするけい酸カルシウム質耐火被覆板の製造
法を提供するものである。The present invention, which succeeds in achieving the above object, is characterized by containing particulate magnesium hydroxide in a matrix composed of a mixed crystal of tobermorite and xonotlite. A refractory coated plate and a slurry-like mixture composed of a siliceous raw material, a calcareous raw material and water are heated under pressure to produce a slurry of calcium silicate hydrate crystals containing xonotlite crystals as a main component. Acidic raw material, calcareous raw material,
Calcium silicate characterized by mixing particulate magnesium hydroxide and reinforcing inorganic fibers, forming into a plate, and heating the obtained plate-shaped product in pressurized steam under the conditions of tobermorite formation and then drying. A method for manufacturing a fireproof coated plate is provided.
【０００５】[0005]
【作用】水酸化マグネシウムを含有する本発明の耐火被
覆板は、水酸化マグネシウムを含まないほかは同様の基
本組成の従来品と比べると、同じ水準の耐火性を鉄骨に
付与するのに必要な厚さが約２／３で済む。その理由
は、加熱されたとき、吸熱反応である水酸化マグネシウ
ムの脱水反応が生じて温度上昇を遅らせることによるも
のと推察される。すなわち、水酸化マグネシウムは約４
００℃で脱水反応を起こして酸化マグネシウムに変わる
ので、それを含有するけい酸カルシウム板は、加熱され
たとき上記脱水温度を越えるまでの時間が長くなって、
見かけ上、断熱性能が向上する。The fire-resistant coated plate of the present invention containing magnesium hydroxide is required to impart the same level of fire resistance to the steel frame as compared with the conventional product having the same basic composition except that it does not contain magnesium hydroxide. Thickness is about 2/3. It is presumed that the reason is that when heated, a dehydration reaction of magnesium hydroxide, which is an endothermic reaction, occurs and delays the temperature rise. That is, magnesium hydroxide is about 4
Since a dehydration reaction occurs at 00 ° C. to convert it to magnesium oxide, the calcium silicate plate containing it has a long time until it exceeds the dehydration temperature when heated,
Apparently, the heat insulation performance is improved.
【０００６】水酸化マグネシウムの配合効果は、水酸化
マグネシウム含有率が約１０重量％未満では意味ある程
度には認められないので、１０重量％以上を含有させる
ことが望ましい。また、水酸化マグネシウムの含有率が
高いほど耐火性能はよいが、多くなるにつれて強度及び
断熱性の低下が避けられないので、約５０重量％を上限
とすることが望ましい。特に好ましい含有率は、１５〜
４０重量％である。次に、本発明によるこの耐火被覆板
の製造法を説明する。The effect of compounding magnesium hydroxide is not recognized to a certain extent when the content of magnesium hydroxide is less than about 10% by weight, so that it is desirable to contain 10% by weight or more. Further, the higher the magnesium hydroxide content, the better the fire resistance performance, but as the content increases, it is inevitable that the strength and the heat insulating property deteriorate. Therefore, it is desirable to set the upper limit to about 50% by weight. Particularly preferred content is 15 to 15.
It is 40% by weight. Next, a method of manufacturing the fireproof coated plate according to the present invention will be described.
【０００７】まずけい酸質原料、石灰質原料および多量
の水からなるスラリー状混合物をオートクレーブ中に入
れ、撹拌しながら加圧下に加熱して反応させる。原料と
するけい酸原料と石灰質原料は特に限定されるものでは
なく、ケイ石、生石灰、消石灰等を、Ｃa／Ｓiモル比が
約０.８５〜１.２になるように用いることができる。反
応条件は、水蒸気圧約１２〜２０kg/cm2、反応時間約３
〜８時間の範囲で、水熱反応によりゾノトライト結晶が
生成するように選定する。得られたゾノトライト結晶の
スラリーに、けい酸質原料と石灰質原料をＣaＯ／ＳiＯ
2モル比が約０.７〜０.９になるように添加し、さらに
微粒子状水酸化マグネシウムを全固形分当たり約１０〜
５０重量％、望ましくは約１５〜４０重量％、添加す
る。スラリー中で嵩高な球状集合体を形成している針状
のゾノトライト結晶は、その配合率が製品の嵩密度を左
右するので、最終的な製品の嵩密度が約０.２５〜０.５
５g/cm3になるように配合する。同時に、約８重量％未
満の補強用無機繊維（たとえば耐アルカリ性ガラス繊
維）やパルプを添加し、均一なスラリー状混合物が形成
されるまで撹拌する。First, a slurry mixture consisting of a siliceous raw material, a calcareous raw material and a large amount of water is put into an autoclave and heated under pressure with stirring to react. The silicic acid raw material and the calcareous raw material used as the raw materials are not particularly limited, and silica stone, quick lime, slaked lime and the like can be used so that the Ca / Si molar ratio is about 0.85 to 1.2. The reaction conditions are steam pressure of about 12 to 20 kg / cm 2 and reaction time of about 3
It is selected such that zonotlite crystals are produced by the hydrothermal reaction in the range of ˜8 hours. To the obtained slurry of xonotlite crystals, a siliceous raw material and a calcareous raw material were added to CaO / SiO.
2 added so that the molar ratio is about 0.7 to 0.9, and about 10 to 10 of finely divided magnesium hydroxide is added based on the total solid content.
50% by weight, preferably about 15-40% by weight is added. The acicular xonotlite crystals forming bulky spherical aggregates in the slurry affect the bulk density of the product, so that the final product has a bulk density of about 0.25 to 0.5.
Blend so that it will be 5 g / cm 3 . At the same time, less than about 8% by weight of reinforcing inorganic fibers (eg alkali resistant glass fibers) and pulp are added and stirred until a homogeneous slurry mixture is formed.
【０００８】次いで、スラリー状混合物を板状に脱水プ
レス成形する。得られた成形物は、水蒸気圧約５〜１５
kg/cm2に保たれるオートクレーブ中で約３〜１０時間反
応させてけい酸質原料と石灰質原料からトバモライトを
生成させ、その後、熱風中で乾燥する。Next, the slurry mixture is dehydrated and press-molded into a plate shape. The obtained molded product has a water vapor pressure of about 5 to 15
The reaction is carried out in an autoclave maintained at kg / cm 2 for about 3 to 10 hours to generate tobermorite from the siliceous raw material and the calcareous raw material, and then dried in hot air.
【０００９】[0009]
【実施例】生石灰４７重量部、ケイ石５３重量部、およ
び水１０００重量部をオートクレーブに仕込み、撹拌し
ながら水蒸気圧１６kg/cm2で４時間反応させ、ゾノトラ
イトを生成させた。その後、得られたゾノトライトスラ
リーにケイ石、消石灰、補強用ガラス繊維、および水酸
化マグネシウムを添加、混合した。混合後のスラリーは
板状に脱水プレス成形し、得られた成形物をオートクレ
ーブ中、水蒸気圧９kg/cm2で７時間反応させ、その後１
２０℃の熱風中で乾燥した。比較例として、水酸化マグ
ネシウムを添加しないほかは同様にしたものも製造し
た。[Example] 47 parts by weight of quick lime, 53 parts by weight of silica stone, and 1000 parts by weight of water were charged into an autoclave and reacted at a water vapor pressure of 16 kg / cm 2 for 4 hours while stirring to generate xonotlite. Then, silica stone, slaked lime, reinforcing glass fiber, and magnesium hydroxide were added to and mixed with the obtained zonotolite slurry. The slurry after mixing was dehydrated and press-molded into a plate shape, and the obtained molded product was reacted in an autoclave at a steam pressure of 9 kg / cm 2 for 7 hours and then 1
It was dried in hot air at 20 ° C. As a comparative example, a similar product was manufactured except that magnesium hydroxide was not added.
【００１０】原料配合を変更して得られた６種類の製品
（比較例を含む）について、ＪＩＳA 1304「建築構造部
分の耐火試験方法」に準じて性能試験を行なった。その
結果を、原料配合と共に表１に示す（表中、“ゾノトラ
イト”はゾノトライトスラリーの固形分としての量を示
す）。水酸化マグネシウムを含有する実施例製品は比較
例製品に比べて鋼材の温度上昇を顕著に抑制することが
わかる。Six types of products (including comparative examples) obtained by changing the raw material composition were subjected to a performance test in accordance with JIS A 1304 "Fireproof test method for building structure part". The results are shown in Table 1 together with the raw material composition (in the table, "Zonotolite" indicates the amount of zonotolite slurry as a solid content). It can be seen that the example product containing magnesium hydroxide significantly suppresses the temperature rise of the steel material as compared with the comparative example product.
【００１１】 表１ 実施例１ 比較例１ 実施例２ 比較例２ 実施例３ 比較例３ 原料配合(重量部) ゾノトライト ２５ ２５ ２５ ２５ ３５ ３５ ケイ石 ２０ ３５ ２０ ３５ ２０ ３０ 消石灰 ２０ ３５ ２０ ３５ ２０ ３０ ガラス繊維 ５ ５ ５ ５ ５ ５ Ｍg(ＯＨ)2 ３０ ０ ３０ ０ ２０ ０ 厚さ（mm） ４０ ４０ ３０ ３０ ２０ ２０ 密度（g/cm3） ０.４５ ０.４５ ０.４５ ０.４５ ０.３０ ０.３０ 鋼材平均温度(℃) ３時間加熱後 ３４０ ４２５ ２時間加熱後 ３３０ ３９５ １時間加熱後 ３１５ ３５５Table 1Example 1 Comparative Example 1 Example 2 Comparative example 2 Example 3 Comparative Example 3 Raw material blending (parts by weight) Xonotlite 25 25 25 25 25 35 35 35 Silica 20 35 35 20 35 20 30 Slaked lime 20 35 20 20 35 20 30 Glass fiber 5 5 5 5 5 5 5 Mg (OH)2 30 0 30 0 20 0 Thickness (mm) 40 40 30 30 20 20 Density (g / cm3) 0.45 0.45 0.45 0.45 0.30 0.30 Steel average temperature (° C) 3 hours after heating 340 425 2 hours after heating 330 395 1 hour after heating 315 355
【００１２】[0012]
【発明の効果】上述のように、微粒子状水酸化マグネシ
ウムを均一分散状態で含有させた本発明のけい酸カルシ
ウム質耐火被覆板は、水酸化マグネシウムの脱水反応に
基づく昇温遅延作用により見掛け上の断熱性能が向上す
る。したがって、この耐火被覆板を鉄骨の被覆に使用す
ると、同じ耐火時間を達成するのに必要な厚さが従来品
よりも薄くて済み、鉄骨建築物の内部空間の利用率向上
を可能にする。Industrial Applicability As described above, the calcium silicate refractory coated sheet of the present invention containing finely divided magnesium hydroxide in a uniformly dispersed state apparently has the effect of delaying the temperature rise due to the dehydration reaction of magnesium hydroxide. The heat insulation performance of is improved. Therefore, when this fireproof coated plate is used for coating a steel frame, the thickness required to achieve the same fireproof time is smaller than that of the conventional product, and it is possible to improve the utilization rate of the internal space of a steel frame building.
───────────────────────────────────────────────────── 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 22:06 Ｃ０４Ｂ 22:06 Ｚ 14:42） 14:42） Ｚ (56)参考文献 特開 昭57−140814（ＪＰ，Ａ) 特開 昭62−207782（ＪＰ，Ａ) 特開 平３−161635（ＪＰ，Ａ)─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display location C04B 22:06 C04B 22:06 Z 14:42) 14:42) Z (56) References JP-A-57-140814 (JP, A) JP-A-62-207782 (JP, A) JP-A-3-161635 (JP, A)
Claims (2)
なるマトリックス中に微粒子状水酸化マグネシウムを含
有することを特徴とするけい酸カルシウム質耐火被覆
板。1. A calcium silicate refractory coated plate characterized by containing particulate magnesium hydroxide in a matrix composed of a mixed crystal of tobermorite and xonotlite.
なるスラリー状混合物を加圧下に加熱してゾノトライト
結晶を主成分とするけい酸カルシウム水和物結晶のスラ
リーを製造し、これにけい酸質原料、石灰質原料、微粒
子状水酸化マグネシウムおよび補強用無機繊維を混合し
たのち板状に成形し、得られた板状成形物を加圧水蒸気
中トバモライト生成条件下で加熱したのち乾燥すること
を特徴とするけい酸カルシウム質耐火被覆板の製造法。2. A slurry-like mixture of a siliceous raw material, a calcareous raw material and water is heated under pressure to produce a slurry of calcium silicate hydrate crystals containing xonotlite crystals as a main component. Characteristic is that high quality raw material, calcareous raw material, particulate magnesium hydroxide and reinforcing inorganic fiber are mixed and then shaped into a plate, and the obtained plate-shaped molded product is heated in pressurized steam under the conditions of tobermorite formation and then dried. A method for manufacturing a calcium silicate refractory coated board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3313240A JP2515197B2 (en) | 1991-11-01 | 1991-11-01 | Calcium silicate refractory coated board and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3313240A JP2515197B2 (en) | 1991-11-01 | 1991-11-01 | Calcium silicate refractory coated board and its manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05124877A JPH05124877A (en) | 1993-05-21 |
| JP2515197B2 true JP2515197B2 (en) | 1996-07-10 |
Family
ID=18038807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3313240A Expired - Lifetime JP2515197B2 (en) | 1991-11-01 | 1991-11-01 | Calcium silicate refractory coated board and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2515197B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2349879B (en) * | 1998-02-23 | 2001-09-05 | Asahi Chemical Ind | Cured calcium silicate object with high strength |
| DE102005018423A1 (en) | 2005-04-21 | 2006-10-26 | Forschungszentrum Karlsruhe Gmbh | Process for the production of components |
| CN111945242A (en) * | 2020-08-14 | 2020-11-17 | 上海申湘混凝土纤维有限公司 | Whisker carbon nanotube modified polypropylene crude fiber and preparation method thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS544968A (en) * | 1977-06-15 | 1979-01-16 | Mitsubishi Motors Corp | Production of molded plastic article having thin metallic film |
| JPS55167167A (en) * | 1979-05-15 | 1980-12-26 | Nippon Asbestos Co Ltd | Manufacture of calcium silicate heat resistant material |
| JPS57140814A (en) * | 1981-02-23 | 1982-08-31 | Japan Steel Works Ltd:The | Heat insulation method for heated metallic material |
| JPS61232256A (en) * | 1985-04-05 | 1986-10-16 | ニチアス株式会社 | Structural material for low melting point metal casting appliance and manufacture |
| JPS62207782A (en) * | 1986-03-06 | 1987-09-12 | 清水建設株式会社 | Refractory coating for steel frame |
| JP2624329B2 (en) * | 1989-05-22 | 1997-06-25 | 株式会社トクヤマ | Calcium silicate composition |
| JPH0765354B2 (en) * | 1989-11-21 | 1995-07-19 | エスケ−化研株式会社 | Steel frame fireproof coating method |
-
1991
- 1991-11-01 JP JP3313240A patent/JP2515197B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05124877A (en) | 1993-05-21 |
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