JP2892431B2 - Calcium silicate compact and method for producing the same - Google Patents
Calcium silicate compact and method for producing the sameInfo
- Publication number
- JP2892431B2 JP2892431B2 JP2088141A JP8814190A JP2892431B2 JP 2892431 B2 JP2892431 B2 JP 2892431B2 JP 2088141 A JP2088141 A JP 2088141A JP 8814190 A JP8814190 A JP 8814190A JP 2892431 B2 JP2892431 B2 JP 2892431B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- calcium silicate
- raw material
- producing
- pyrophyllite
- 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
- C04B28/18—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
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］ 本発明は珪酸カルシウム成形体及びその製造方法に関
する。Description: TECHNICAL FIELD The present invention relates to a calcium silicate molded article and a method for producing the same.
［従来の技術・課題］ 珪酸カルシウム成形体は建築用内外装材、船舶用隔壁
材、工業用断熱材等の広い分野で利用されている。[Prior art / problems] Calcium silicate compacts are used in a wide range of fields such as interior and exterior materials for buildings, partition walls for ships, and industrial heat insulating materials.
これらの珪酸カルシウム成形体はその用途により諸々
の形状に切断加工されている。この際に、従来の珪酸カ
ルシウム成形体は切断、加工治具の消耗が激しく、工具
の寿命が短い。また、切断面、木口に欠けが生じ易いな
どの問題があった。特に、嵩比重が1.0を超える成形体
や嵩比重が1.0以下であっても厚さが10mmを超える成形
体あるいは加熱処理を施した成形体は著しく切削加工性
が悪かった。These calcium silicate compacts are cut into various shapes depending on the application. At this time, the conventional calcium silicate molded body has severe cutting and processing jigs, and the tool life is short. In addition, there has been a problem that the cut surface and the opening are easily chipped. In particular, a molded product having a bulk specific gravity exceeding 1.0, a molded product having a thickness exceeding 10 mm even when the bulk specific gravity was 1.0 or less, or a molded product subjected to a heat treatment had remarkably poor cutting workability.
このような珪酸カルシウム成形体の加工性を改善する
ための手段として特開昭59−228970号公報や特開昭61−
88036号公報において石綿を含まない珪酸カルシウム成
形体中へワラストナイト及びタルクを添加する方法が提
案されている。しかしながら、低品位のタルク中には、
石綿繊維が混在することがあり、無石綿成形体を目的と
した場合、不向きな方法であった。As means for improving the processability of such a calcium silicate molded article, Japanese Patent Application Laid-Open Nos.
No. 88036 proposes a method of adding wollastonite and talc to a calcium silicate compact containing no asbestos. However, during low-grade talc,
Asbestos fibers may be mixed, and this method is not suitable for the purpose of forming an asbestos-free molded article.
［課題を解決するための手段］ 本発明者らは上述の課題を解決すべく鋭意研究の結
果、珪酸カルシウム成形体にパイロフィライト質鉱物を
添加することにより上記問題点を解決できることを見出
した。[Means for Solving the Problems] The present inventors have conducted intensive studies to solve the above problems, and as a result, have found that the above problems can be solved by adding a pyrophyllite mineral to a calcium silicate formed body. .
すなわち、本発明は珪酸カルシウム成形体において、
Al2O3の化学分析値が12重量％以上のパイロフィライト
質鉱物10〜50重量％含有することを特徴とする珪酸カル
シウム成形体に係る。That is, the present invention relates to a calcium silicate molded body,
The present invention relates to a calcium silicate molded product characterized by containing 10 to 50% by weight of a pyrophyllite mineral having a chemical analysis value of Al 2 O 3 of 12% by weight or more.
更に、本発明は珪酸カルシウム成形体の製造方法にお
いて、原料として石灰質原料と珪酸質原料からなる珪酸
カルシウム原料25〜90重量％、Al2O3の化学分析値が12
重量％以上のパイロフィライト質鉱物10〜50重量％、充
填剤０〜30重量％及び補強用繊維０〜15重量％を使用す
ることを特徴とする珪酸カルシウム成形体の製造方法に
係る。Further, the present invention relates to a method for producing a calcium silicate molded product, wherein a calcium silicate raw material comprising a calcareous raw material and a siliceous raw material is 25 to 90% by weight, and the chemical analysis value of Al 2 O 3 is 12
The present invention relates to a method for producing a calcium silicate molded body, comprising using 10 to 50% by weight of a pyrophyllite mineral of at least 10% by weight, 0 to 30% by weight of a filler, and 0 to 15% by weight of reinforcing fibers.
［作用］ 本発明の珪酸カルシウム成形体はAl2O3の化学分析値
が12重量％以上のパイロフィライト質鉱物を10〜50重量
％含有することに特徴がある。パイロフィライト質鉱物
としてAl2O3の化学分析値が12重量％以上のものを使用
するのは、該分析値比が12未満であると、パイロフィラ
イトの理論組成式Al2O3・4SiO2・H2Oからのずれが大き
くなり過ぎ、パイロフィライト質鉱物中のパイロフィラ
イト含量が少なくなり、添加効果が低下するためであ
る。なお、パイロフィライト質鉱物の組成は石英、カオ
リナイト等が鉱床中に混在するために上記パイロフィラ
イト理論組成式から大きくずれている場合が多く、上記
化学分析値により本発明に使用可能なパイロフィライト
質鉱物を規定した。また、パイロフィライト質鉱物の添
加配合量が10重量％未満の場合には切削加工性の改善が
得られないために好ましくなく、また、50重量％を超え
ると著しい強度低下のために好ましくない。[Function] The calcium silicate compact of the present invention is characterized in that it contains 10 to 50% by weight of a pyrophyllite mineral having a chemical analysis value of Al 2 O 3 of 12% by weight or more. The reason why the chemical analysis value of Al 2 O 3 is 12% by weight or more as the pyrophyllite mineral is that if the analysis value ratio is less than 12, the theoretical composition formula of pyrophyllite Al 2 O 3. This is because the deviation from 4SiO 2 · H 2 O becomes too large, the content of pyrophyllite in the pyrophyllite mineral decreases, and the effect of addition decreases. In addition, the composition of the pyrophyllite mineral often deviates greatly from the above-mentioned pyrophyllite theoretical composition formula because quartz, kaolinite and the like are mixed in the ore deposit, and can be used in the present invention by the above-mentioned chemical analysis values. Pyrophyllite minerals were specified. Further, if the addition amount of the pyrophyllite mineral is less than 10% by weight, it is not preferable because no improvement in the machinability can be obtained, and if it exceeds 50% by weight, the strength is remarkably reduced, which is not preferable. .
本発明の珪酸カルシウム成形体は上記パイロフィライ
ト質鉱物を10〜50重量％添加配合してなるものである。
本発明の珪酸カルシウム成形体は下記の方法により製造
することができる。The calcium silicate compact of the present invention is obtained by adding and blending the above pyrophyllite mineral in an amount of 10 to 50% by weight.
The calcium silicate compact of the present invention can be produced by the following method.
まず、石灰質原料と珪酸質原料からなる珪酸カルシウ
ム原料25〜90重量％、Al2O3の化学分析値が12重量％以
上のパイロフィライト質鉱物10〜50重量％、充填材０〜
30重量％及び補強用繊維０〜15重量％よりなる混合物を
得る。First, a calcium silicate raw material composed of a calcareous raw material and a siliceous raw material, 25 to 90% by weight, a pyrophyllite mineral having a chemical analysis value of Al 2 O 3 of 12% by weight or more, 10 to 50% by weight, a filler 0 to
A mixture consisting of 30% by weight and 0-15% by weight of reinforcing fibers is obtained.
得られた混合物には従来既知の成形方法及び養生反応
を適用することができる。例えば、該混合物に所定量の
水を添加してスラリーを得、次に、プレス脱水法、抄造
法等の方法により成形し、次に、飽和水蒸気圧下オート
クレーブにより養生を行う方法や、前記混合物を慣用の
方法により成形した後、飽和水蒸気圧下オートクレーブ
により養生を行う方法等を使用することができる。A conventionally known molding method and curing reaction can be applied to the obtained mixture. For example, a slurry is obtained by adding a predetermined amount of water to the mixture, then molded by a method such as press dewatering, papermaking, and then cured by an autoclave under a saturated steam pressure, or the mixture is subjected to curing. After molding by a conventional method, a method of curing with an autoclave under a saturated steam pressure can be used.
本発明の珪酸カルシウム成形体を製造するに当たり使
用可能な石灰質原料は特に限定されるものではなく、従
来より使用されている原料が全て使用できる。例えばセ
メント、消石灰、生石灰、アセチレン滓等を使用するこ
とができる。The calcareous raw material that can be used in producing the calcium silicate molded product of the present invention is not particularly limited, and all conventionally used raw materials can be used. For example, cement, slaked lime, quicklime, acetylene slag and the like can be used.
次に、珪酸質原料もまた従来より使用されている原料
が全て使用できる。例えば珪石、ハロイサイト、カオリ
ナイト等の結晶質珪酸、珪藻土、フライアッシュ、シリ
カフラワー、ホワイトカーボン等の非晶質シリカ等を使
用することができる。Next, as the siliceous raw material, all of the conventionally used raw materials can be used. For example, crystalline silicic acid such as silica stone, halloysite, kaolinite, etc., diatomaceous earth, fly ash, silica flower, amorphous silica such as white carbon and the like can be used.
これら石灰質原料と珪酸質原料からなる珪酸カルシウ
ム原料の添加配合量は25〜90重量％の範囲内である。珪
酸カルシウム原料の添加配合量が25重量％未満であると
充分な強度が得られないために好ましくなく、また、90
重量％を超えると充分な切削加工性が得られないために
好ましくない。The added amount of the calcium silicate raw material composed of the calcareous raw material and the siliceous raw material is in the range of 25 to 90% by weight. If the added amount of the calcium silicate raw material is less than 25% by weight, sufficient strength cannot be obtained, which is not preferable.
If the content exceeds% by weight, sufficient cutting workability cannot be obtained, which is not preferable.
また、本発明の珪酸カルシウム成形体には必要に応じ
て適当量の充填材を添加することができる。該充填材の
添加配合量は30重量％以下が好ましい。添加配合量が30
重量％を超えると強度低下を起こす原因となるために好
ましくない。なお、使用可能な充填材類としては例えば
ワラストナイト、マイカ、炭酸カルシウム等を挙げるこ
とができる。Further, an appropriate amount of a filler can be added to the calcium silicate molded article of the present invention, if necessary. The amount of the filler added is preferably 30% by weight or less. Addition amount is 30
Exceeding the weight% is not preferable because it causes a reduction in strength. Examples of fillers that can be used include wollastonite, mica, calcium carbonate, and the like.
更に、本発明の珪酸カルシウム成形体には適当な量の
繊維類を添加配合することができる。繊維類は従来から
珪酸カルシウム成形体に使用されていたものが全て使用
できる。例えば木質パルプ、レーヨン等の有機質繊維、
石綿、ガラス質繊維等の無機質繊維が例示できる。添加
量は15重量％以下、好適には２〜15重量％の範囲内であ
る。15重量％を超えて繊維類を添加すると、原料の混合
不良に起因する成形体の欠陥を生じ易く、また２重量％
未満であると添加効果がなく、オートクレーブ処理前の
成形体の自己保持性の改善効果が期待できない。Further, an appropriate amount of fibers can be added to the calcium silicate molded article of the present invention. As the fibers, all those conventionally used for calcium silicate molded bodies can be used. For example, organic fibers such as wood pulp and rayon,
Examples thereof include inorganic fibers such as asbestos and glassy fibers. The amount added is up to 15% by weight, preferably in the range from 2 to 15% by weight. If fibers are added in excess of 15% by weight, defects in the molded body due to poor mixing of the raw materials are likely to occur, and 2% by weight.
If it is less than the above, there is no effect of addition, and the effect of improving the self-holding property of the molded body before the autoclave treatment cannot be expected.
上述のような成分配合をもつ混合物を上述のような成
形方法によりに所定の形状に成形し、次に、オートクレ
ーブ養生を行う。オートクレーブ養生は140〜220℃の飽
和水蒸気圧下で３時間以上処理する。温度が140℃未満
であったり、養生時間が３時間未満の短時間処理では、
未反応の石灰質が残存する場合が多く、珪酸カルシウム
の生成が不充分となるために好ましくない。また、220
℃を超える温度では得られる珪酸カルシウム成形体が堅
く、脆くなるために不適当である。The mixture having the above-described component composition is formed into a predetermined shape by the above-described forming method, and then autoclaved. The autoclave curing is performed under a saturated steam pressure of 140 to 220 ° C. for 3 hours or more. In the case of short-time treatment with a temperature of less than 140 ° C or a curing time of less than 3 hours,
Unreacted calcareous material often remains, which is not preferable because the formation of calcium silicate becomes insufficient. Also, 220
If the temperature exceeds 0 ° C., the obtained calcium silicate molded body is not suitable because it is hard and brittle.
［実施例］ 以下に実施例を挙げて本発明の珪酸カルシウム成形体
を更に説明する。[Example] Hereinafter, the calcium silicate molded product of the present invention will be further described with reference to examples.
実施例 以下の第１表に示した配合割合にて秤量した原料を固
形分の４倍量の水で分散、混合してスラリー化した後、
型枠に流し込み、150kg/cm2の圧力で脱水成形を行い、
厚さ7mmの成形体を作成した。得られた成形体を180℃の
飽和水蒸気圧下10時間オートクレーブ養生を行った。こ
の成形体を105℃の乾燥機中で24時間乾燥した後、嵩比
重、曲げ強さ並びに加工性を試験した。Example After the raw materials weighed at the compounding ratios shown in Table 1 below were dispersed and mixed with 4 times the amount of solids of water to form a slurry,
Pour into a mold, perform dehydration molding at a pressure of 150 kg / cm 2 ,
A molded body having a thickness of 7 mm was prepared. The obtained molded body was subjected to autoclave curing under a saturated steam pressure of 180 ° C. for 10 hours. After drying this molded body in a dryer at 105 ° C. for 24 hours, the bulk specific gravity, bending strength and workability were tested.
加工性試験はJIS B−4751に規定されるハンドソー（2
50×12×0.64×14T）に1.2kgの荷重を成形体の厚さ方向
にかけ、ハンドソーの中心部75mmの範囲で往復させ、成
形体が切断された深さを測定したものである。また、兼
房刃物社製超硬チップソー：スーパハイマックスにて24
50mmの長さ及び6mm厚さを有する板状成形体を切断し、
切断木口の様子を観察した。The workability test was performed using a hand saw (2
A load of 1.2 kg was applied to the molded body in a thickness direction of 50 × 12 × 0.64 × 14T) and reciprocated within a range of 75 mm at the center of the hand saw, and the depth at which the molded body was cut was measured. In addition, the carbide tip saw manufactured by Kanefusa: 24
Cutting a plate-shaped molded body having a length of 50 mm and a thickness of 6 mm,
The state of the cutting edge was observed.
なお、実施例に使用したパイロフィライト質鉱物はAl
2O3の化学分析値が15.49重量％のものである。The pyrophyllite mineral used in the examples was Al
The chemical analysis value of 2 O 3 is 15.49% by weight.
比較例 第２表に示す配合割合にて原料を秤量し、以下、実施
例と同様に成形体を作製し、物性試験を行った。 Comparative Example Raw materials were weighed at the compounding ratios shown in Table 2 and molded articles were prepared in the same manner as in the examples, and physical properties were tested.
第２表中、＊１は裏面切口に幅3mm程度の欠けが生じた
ことを示す。 In Table 2, * 1 indicates that a notch with a width of about 3 mm occurred in the rear cut.
［発明の効果］ 本発明の珪酸カルシウム成形体はパイロフィライト質
鉱物を含有しているために、加工性が良好で且つ強度も
高く、建築用内外装材、船舶用隔壁材、工業用断熱材等
の広い分野に利用することができる。[Effect of the Invention] Since the calcium silicate molded product of the present invention contains a pyrophyllite mineral, it has good workability and high strength, and is used for building interior and exterior materials, ship bulkhead materials, and industrial heat insulation. It can be used in a wide range of fields such as materials.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平１−242454（ＪＰ，Ａ) 特開 平２−307855（ＪＰ，Ａ) 特開 昭48−1021（ＪＰ，Ａ) 特開 昭59−21558（ＪＰ，Ａ) 特開 平１−153562（ＪＰ，Ａ) 特開 昭48−92958（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) C04B 28/18 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-242454 (JP, A) JP-A-2-307855 (JP, A) JP-A-48-1021 (JP, A) JP-A-59-1984 21558 (JP, A) JP-A-1-153562 (JP, A) JP-A-48-92958 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) C04B 28/18
Claims (2)
化学分析値が12重量％以上のパイロフィライト質鉱物10
〜50重量％含有することを特徴とする珪酸カルシウム成
形体。1. A pyrophyllite mineral having a calcium silicate compact whose chemical analysis value of Al 2 O 3 is 12% by weight or more.
A calcium silicate molded product characterized by containing about 50% by weight.
て、原料として石灰質原料と珪酸質原料からなる珪酸カ
ルシウム原料25〜90重量％、Al2O3の化学分析値が12重
量％以上のパイロフィライト質鉱物10〜50重量％、充填
剤０〜30重量％及び補強用繊維０〜15重量％を使用する
ことを特徴とする珪酸カルシウム成形体の製造方法。2. A method for producing a calcium silicate molded body, wherein pyrophyllite having a calcium silicate raw material comprising a calcareous raw material and a siliceous raw material of 25 to 90% by weight and a chemical analysis value of Al 2 O 3 of 12% by weight or more. A method for producing a calcium silicate molded product, comprising using 10 to 50% by weight of a porous mineral, 0 to 30% by weight of a filler, and 0 to 15% by weight of reinforcing fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2088141A JP2892431B2 (en) | 1990-04-04 | 1990-04-04 | Calcium silicate compact and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2088141A JP2892431B2 (en) | 1990-04-04 | 1990-04-04 | Calcium silicate compact and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03290349A JPH03290349A (en) | 1991-12-20 |
| JP2892431B2 true JP2892431B2 (en) | 1999-05-17 |
Family
ID=13934658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2088141A Expired - Fee Related JP2892431B2 (en) | 1990-04-04 | 1990-04-04 | Calcium silicate compact and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2892431B2 (en) |
-
1990
- 1990-04-04 JP JP2088141A patent/JP2892431B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03290349A (en) | 1991-12-20 |
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