JP2000072509A - Production of inorganic building material - Google Patents
Production of inorganic building materialInfo
- Publication number
- JP2000072509A JP2000072509A JP23776498A JP23776498A JP2000072509A JP 2000072509 A JP2000072509 A JP 2000072509A JP 23776498 A JP23776498 A JP 23776498A JP 23776498 A JP23776498 A JP 23776498A JP 2000072509 A JP2000072509 A JP 2000072509A
- Authority
- JP
- Japan
- Prior art keywords
- inorganic building
- building material
- raw material
- admixture
- wollastonite
- 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
-
- 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
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)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この出願の発明は、無機質建
材の製造方法に関するものである。さらに詳しくは、こ
の出願の発明は、強度とともに寸法安定性に優れた建築
用内外装材等の無機質建材を安価かつ容易に製造するこ
とのできる無機質建材の製造方法に関するものである。The present invention relates to a method for producing an inorganic building material. More specifically, the invention of this application relates to a method for manufacturing an inorganic building material that can easily and inexpensively manufacture an inorganic building material such as a building interior / exterior material having excellent strength and dimensional stability.
【０００２】[0002]
【従来の技術】従来より、建築用内外装材には、セメン
トを主成分とする無機質建材が広く用いられている。こ
の無機質建材には、強度向上を目的として、しばしば石
綿、パルプ等の補強材が添加混合されている。その一方
で、このような補強材含有の無機質建材については、吸
湿・乾燥に伴い、変化率で0.3 〜0.4 ％程度という比較
的大きな寸法変化を生じるという問題が指摘されてもい
る。この寸法変化率に従うと、長尺のたとえば3000mmの
製品では寸法変化は１０mmにも及び、住宅等の内外装材
として施工した場合には、製品相互の間に隙間が生じ、
また、割れ等が発生することになる。2. Description of the Related Art Conventionally, inorganic building materials containing cement as a main component have been widely used as interior and exterior materials for buildings. Reinforcing materials such as asbestos and pulp are often added to the inorganic building materials for the purpose of improving strength. On the other hand, it has also been pointed out that such a building material containing a reinforcing material causes a relatively large dimensional change of about 0.3 to 0.4% due to moisture absorption and drying. According to this dimensional change rate, a long product such as 3000 mm has a dimensional change as large as 10 mm, and when constructed as an interior / exterior material for a house or the like, a gap occurs between the products,
In addition, cracks and the like will occur.
【０００３】ここで、寸法変化率は、次式で求められる
値である。すなわち、Here, the dimensional change rate is a value obtained by the following equation. That is,
【０００４】[0004]
【数１】 (Equation 1)
【０００５】そこで、このような無機質建材の寸法変化
を抑えるための試みがこれまでに幾つかなされている。
その一般的な例がオートクレーブ養生である。すなわ
ち、成形したモルタルを高温高圧下に置き、主成分であ
るセメントを原料中のシリカと反応させ、これによって
寸法安定性を実現するのである。[0005] Therefore, several attempts have been made to suppress such dimensional change of inorganic building materials.
A common example is autoclave curing. That is, the molded mortar is placed under high temperature and high pressure, and the cement as a main component reacts with silica in the raw material, thereby realizing dimensional stability.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、オート
クレーブ養生は、上記の通り、高温高圧を条件とし、そ
のための設備を必要とする。この設備は、一般に大規模
であり、従って、製造される無機質建材の価格に反映す
るとともに、その製造は容易とは言いにくい。この出願
の発明は、以上の通りの事情に鑑みてなされたものであ
り、従来の無機質建材の欠点を解消し、強度とともに寸
法安定性に優れた建築用内外装材等の無機質建材を安価
かつ容易に製造することのできる無機質建材の製造方法
を提供することを目的としている。However, as described above, autoclave curing requires high temperature and high pressure, and requires equipment for this purpose. This equipment is generally large-scale and therefore reflects the price of the inorganic building material produced and is not easily manufactured. The invention of this application has been made in view of the circumstances described above, and eliminates the disadvantages of conventional inorganic building materials, and makes it possible to reduce the cost of inorganic building materials such as interior and exterior materials for buildings with excellent strength and dimensional stability. It is an object of the present invention to provide a method for manufacturing an inorganic building material that can be easily manufactured.
【０００７】[0007]
【課題を解決するための手段】この出願の発明は、上記
の課題を解決するものとして、セメントを主体とし、こ
れに補強材及び混和材が添加混合された原料に、水を加
え、成形して養生硬化させる無機質建材の製造方法であ
って、混和材はアスペクト比８〜９のウォラストナイト
であり、原料中に１０〜２０重量％添加混合されること
を特徴とする無機質建材の製造方法を提供する。Means for Solving the Problems In order to solve the above-mentioned problems, the invention of this application is based on a method in which water is added to a raw material in which cement is mainly used, and a reinforcing material and an admixture are added and mixed with the cement. A method for producing an inorganic building material, wherein the admixture is wollastonite having an aspect ratio of 8 to 9 and 10 to 20% by weight is added to and mixed with the raw material. I will provide a.
【０００８】この出願の発明においては、混和材として
さらにシリカを原料中に添加混合すること、並びに雰囲
気温度６０〜８０℃で養生することを好ましい態様とし
てもいる。In the invention of this application, it is also preferable that silica is further added to the raw material as an admixture, and curing is performed at an ambient temperature of 60 to 80 ° C.
【０００９】[0009]
【発明の実施の形態】この出願の発明の無機質建材の製
造方法では、上記の通り、補強材が添加混合されたセメ
ントを主体とする原料中に、アスペクト比８〜９のウォ
ラストナイトを混和材として１０〜２０重量％添加混合
する。ウォラストナイトは、ＣａＳｉＯ3 （ＣａＯ・Ｓ
ｉＯ2 ）の組成を持ち、その結晶は針状である。このよ
うにウォラストナイトは針状構造を有するため、無機質
建材の基材中に存在するゲル孔を通じての水の出入りに
起因する無機質建材の収縮・膨張を物理的に抑えること
ができ、吸湿・乾燥に伴う寸法変化が緩和されるのであ
る。BEST MODE FOR CARRYING OUT THE INVENTION In the method for producing an inorganic building material according to the invention of the present application, as described above, wollastonite having an aspect ratio of 8 to 9 is mixed with a raw material mainly composed of cement mixed with a reinforcing material. 10 to 20% by weight of the material is added and mixed. Wollastonite is made of CaSiO 3 (CaO · S
iO 2 ), and the crystals are acicular. Since wollastonite has a needle-like structure in this manner, shrinkage / expansion of the inorganic building material due to the ingress and egress of water through the gel pores present in the base material of the inorganic building material can be physically suppressed, The dimensional change due to drying is reduced.
【００１０】アスペクト比は、粒子の長さと直径の比、
すなわち、（長さ）／（直径）であるが、この出願の発
明の無機質建材の製造方法では、ウォラストナイトのア
スペクト比を８〜９としている。ウォラストナイトのア
スペクト比が８未満の場合には、0.3 ％未満の寸法変化
率を実現するためにウォラストナイトは２０重量％より
多く必要となる。しかしながら、ウォラストナイトが２
０重量％を超えると、モルタルが抄造又は成型しにくく
なり、成形性が悪化し、生産効率に影響する。同時に価
格にも反映する。また、アスペクト比が９を超えても、
モルタルは抄造又は成型しにくくなる。このように、こ
の出願の発明の無機質建材の製造方法では、ウォラスト
ナイトのアスペクト比の許容範囲を経済性及び生産効率
の両面から規定しており、その上限は９で、下限は８で
ある。The aspect ratio is the ratio of the length to the diameter of a particle,
That is, (length) / (diameter), but the aspect ratio of wollastonite is set to 8 to 9 in the method for manufacturing an inorganic building material according to the invention of this application. If the aspect ratio of wollastonite is less than 8, more than 20% by weight of wollastonite is required to achieve a dimensional change of less than 0.3%. However, wollastonite is 2
If it exceeds 0% by weight, it becomes difficult to form or mold the mortar, the formability deteriorates, and the production efficiency is affected. At the same time reflect on the price. Also, even if the aspect ratio exceeds 9,
Mortar becomes difficult to make or mold. As described above, in the method for manufacturing an inorganic building material according to the invention of the present application, the allowable range of the aspect ratio of wollastonite is defined in terms of both economy and production efficiency, and the upper limit is 9 and the lower limit is 8. .
【００１１】また、この出願の発明の無機質建材の製造
方法では、ウォラストナイトの配合量を１０〜２０重量
％としている。この配合量の規定は、上記した通りの経
済性及び生産効率に基づくとともに、寸法安定性の実現
に基づく。すなわち、上記アスペクト比において、１０
重量％未満では寸法変化率が0.3 ％以上となり、寸法安
定性に欠け、２０重量％を超えると、モルタルが抄造又
は成型しにくくなり、また、価格に反映する。In the method for producing an inorganic building material according to the invention of the present application, the amount of wollastonite is 10 to 20% by weight. The definition of the compounding amount is based on the economic efficiency and the production efficiency as described above, and also based on the realization of the dimensional stability. That is, in the above aspect ratio, 10
If the amount is less than 30% by weight, the dimensional change rate becomes 0.3% or more, and the dimensional stability is lacking. If the amount exceeds 20% by weight, the mortar becomes difficult to form or mold and is reflected in the price.
【００１２】このように、この出願の発明の無機質建材
の製造方法では、アスペクト比８〜９のウォラストナイ
トを、補強材が添加混合されたセメントを主体とする原
料中に１０〜２０重量％添加混合することにより、オー
トクレーブ養生によらずに、強度に優れ、しかも寸法変
化率0.3 ％未満という優れた寸法安定性を有する無機質
建材を製造することができるのである。養生は、たとえ
ば雰囲気温度６０〜８０℃で行うことができ、無機質建
材を安価かつ容易に製造することが可能となる。As described above, according to the method for producing an inorganic building material of the invention of this application, wollastonite having an aspect ratio of 8 to 9 is contained in a raw material mainly composed of cement mixed with a reinforcing material in an amount of 10 to 20% by weight. By adding and mixing, an inorganic building material having excellent strength and excellent dimensional stability with a dimensional change rate of less than 0.3% can be produced without depending on the autoclave curing. Curing can be performed, for example, at an ambient temperature of 60 to 80 ° C., and inorganic building materials can be manufactured easily at low cost.
【００１３】なお、この出願の発明の無機質建材の製造
方法では、混和材としてさらにシリカを原料中に添加混
合することもできる。その際のシリカの配合量は、ウォ
ラストナイトとの合計量で２０重量％以下となるように
するのが好ましい。以下実施例を示し、この出願の発明
の無機質建材の製造方法についてさらに詳しく説明す
る。In the method for producing an inorganic building material according to the invention of the present application, silica can be further added to and mixed with the raw material as an admixture. It is preferable that the compounding amount of silica at that time is 20% by weight or less in total with wollastonite. Examples are shown below, and the method for producing an inorganic building material of the present invention will be described in more detail.
【００１４】[0014]
【実施例】（実施例１及び２、比較例１〜５）セメント
を７０重量％とし、これに補強材として石綿を、また、
表１に示した成分を混和材として添加混合した原料に水
を加え、モルタルとし、これを成型した後に、雰囲気温
度６０℃で120 時間養生した。EXAMPLES (Examples 1 and 2, Comparative Examples 1 to 5) Cement was 70% by weight, asbestos was used as a reinforcing material, and
Water was added to a raw material obtained by adding and mixing the components shown in Table 1 as an admixture to form a mortar, which was molded and then cured at an ambient temperature of 60 ° C. for 120 hours.
【００１５】なお、シリカについては粒度100 μｍ以下
のものを使用した。The silica used had a particle size of 100 μm or less.
【００１６】[0016]
【表１】 [Table 1]
【００１７】得られた各試料について寸法変化率を測定
した。その結果を表１に合わせて示した。アスペクト比
8.0 のウォラストナイトを１０乃至２０重量％原料中に
添加混合して製造した試料は、0.3 ％未満の寸法変化率
を実現した。寸法安定性に優れた無機質建材の製造が可
能であることが確認される。The dimensional change rate of each of the obtained samples was measured. The results are shown in Table 1. aspect ratio
Samples prepared by adding and mixing 8.0 wollastonite in 10 to 20% by weight of the raw material achieved a dimensional change of less than 0.3%. It is confirmed that it is possible to produce an inorganic building material having excellent dimensional stability.
【００１８】一方、ウォラストナイトのアスペクト比が
８を下回ると、２０重量％の配合量でも寸法安定性は向
上しない。また、アスペクト比が8.0 であっても、配合
量が１０重量％を下回ると、寸法安定性は劣化する。さ
らに、シリカのみでは寸法安定性の向上は望めない。も
ちろんこの出願の発明は、以上の実施形態によって限定
されるものではない。セメント及び補強材の種類、配合
量、また、成形方法、養生条件等の細部については様々
な態様が可能であることは言うまでもない。On the other hand, when the aspect ratio of wollastonite is less than 8, the dimensional stability is not improved even with the blending amount of 20% by weight. Further, even if the aspect ratio is 8.0, if the amount is less than 10% by weight, the dimensional stability is deteriorated. Further, improvement of dimensional stability cannot be expected only with silica. Of course, the invention of this application is not limited by the above embodiments. It goes without saying that various aspects are possible with respect to details such as the types and amounts of cement and reinforcing material, the molding method and the curing conditions.
【００１９】[0019]
【発明の効果】以上詳しく説明した通り、この出願の発
明によって、オートクレーブ養生によらずに、強度とと
もに寸法安定性に優れた建築用内外装材等の無機質建材
を製造することができる。無機質建材は、安価かつ容易
に製造可能となる。As described in detail above, according to the invention of this application, an inorganic building material such as a building interior / exterior material having excellent strength and dimensional stability can be manufactured without depending on autoclave curing. Inorganic building materials can be manufactured cheaply and easily.
Claims (3)
混和材が添加混合された原料に、水を加え、成形して養
生硬化させる無機質建材の製造方法であって、混和材は
アスペクト比８〜９のウォラストナイトであり、原料中
に１０〜２０重量％添加混合されることを特徴とする無
機質建材の製造方法。1. A method for producing an inorganic building material comprising a cement as a main component, a reinforcing material and an admixture, water added to the raw material, and molding and curing. 9. A method for producing an inorganic building material, wherein the wollastonite of No. 9 to No. 9 is added to and mixed with 10 to 20% by weight of the raw material.
加混合される請求項１記載の無機質建材の製造方法。2. The method for producing an inorganic building material according to claim 1, wherein silica is further added to and mixed with the raw material as an admixture.
項１又は２記載の無機質建材の製造方法。3. The method for producing an inorganic building material according to claim 1, wherein the curing is performed at an ambient temperature of 60 to 80 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23776498A JP2000072509A (en) | 1998-08-24 | 1998-08-24 | Production of inorganic building material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23776498A JP2000072509A (en) | 1998-08-24 | 1998-08-24 | Production of inorganic building material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000072509A true JP2000072509A (en) | 2000-03-07 |
Family
ID=17020109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23776498A Pending JP2000072509A (en) | 1998-08-24 | 1998-08-24 | Production of inorganic building material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000072509A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11560335B2 (en) | 2017-12-26 | 2023-01-24 | Kuraray Co., Ltd. | Molded body formed from curable composition |
-
1998
- 1998-08-24 JP JP23776498A patent/JP2000072509A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11560335B2 (en) | 2017-12-26 | 2023-01-24 | Kuraray Co., Ltd. | Molded body formed from curable composition |
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