JPH07115965B2 - Method for manufacturing steam-cured lightweight cellular concrete - Google Patents
Method for manufacturing steam-cured lightweight cellular concreteInfo
- Publication number
- JPH07115965B2 JPH07115965B2 JP2017892A JP1789290A JPH07115965B2 JP H07115965 B2 JPH07115965 B2 JP H07115965B2 JP 2017892 A JP2017892 A JP 2017892A JP 1789290 A JP1789290 A JP 1789290A JP H07115965 B2 JPH07115965 B2 JP H07115965B2
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- viscosity
- slurry
- cellular concrete
- lightweight cellular
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Landscapes
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
本発明は、水蒸気養生軽量気泡コンクリート（以下ALC
と略する）の製造方法の改良に関する。The present invention is a steam-cured lightweight cellular concrete (hereinafter referred to as ALC
Abbreviated).
ALCは、セメント及び生石灰等の石灰質原料粉末と、珪
石、珪砂等の珪酸質原料粉末とに、水を加えて前水和し
てから、ミキサーにて撹拌混合しスラリー状としたの
ち、アルミニウム粉末を加えて発泡、半可塑化させ、次
いでオートクレープに移して高温高圧水蒸気養生を行っ
て製造されている。 なお、前水和は、ミキサーの撹拌力低下による混合不足
を防止するために行われ、その詳細については特開昭62
−265160に記載されている。 このようにして得られたALCは、建築材料として極めて
均質な外観を有することが必要である。 しかし、ミキサーにて撹拌する際、空気泡が混入し、そ
れがそのまま型枠内へ持ち込まれることにより、製品の
表面及び内部に、長径5mm以上の粗大な気泡（巨大気
泡）が相当数存在することがしばしばあって、製品表面
の美感を損ねて商品価値を落とすのみでなく、塗料など
を塗布する場合には穴埋め等の作業を必要とするなどの
問題点があった。ALC is a calcareous raw material powder such as cement and quick lime, and a siliceous raw material powder such as silica stone, silica sand, and the like. Is foamed and semi-plasticized, and then transferred to an autoclave for high-temperature and high-pressure steam curing to manufacture. The pre-hydration is carried out in order to prevent insufficient mixing due to a decrease in the stirring power of the mixer.
-265160. The ALC thus obtained must have a very homogeneous appearance as a building material. However, when agitating with a mixer, air bubbles are mixed and brought into the mold as it is, so that there are a considerable number of coarse bubbles (giant bubbles) with a major axis of 5 mm or more on the surface and inside of the product. In many cases, there is a problem that not only the appearance of the product is spoiled and the commercial value is lowered, but also the work such as filling holes is required when applying paint or the like.
本発明の目的は、前記のような巨大気泡の発生を極力抑
制することのできるALCの製造方法を提供することにあ
る。An object of the present invention is to provide a method for producing ALC capable of suppressing the generation of giant bubbles as described above as much as possible.
本発明のALCの製造方法は、セメント及び生石灰よりな
る石灰質原料と、少なくとも珪石あるいは珪砂よりなる
珪酸質原料、アルミニウム粉末からなる発泡剤、及び水
を主要原料とする水蒸気養生軽量気泡コンクリートの製
造方法において、石灰質原料と珪酸質原料と添加剤と水
からなる原料スラリーの粘度が1.8P以下1.3P以上の状態
にして鋳込成型を行い、鋳込成型で形成された成形体を
高温高圧水蒸気養生するように構成した。The method for producing ALC of the present invention is a calcareous raw material consisting of cement and quicklime, a siliceous raw material consisting of at least silica stone or silica sand, a foaming agent consisting of aluminum powder, and a method for producing steam-cured lightweight cellular concrete containing water as a main raw material. In, in the raw material slurry consisting of calcareous raw material, siliceous raw material, additives and water, the viscosity of the raw material slurry is 1.8P or less 1.3P or more, cast molding is performed, and the molded body formed by the cast molding is subjected to high temperature high pressure steam curing. Configured to do so.
本発明においては、鋳込成型時の原料スラリーの粘度が
1.8P以下1.3P以上の状態にするが、その理由を以下に述
べる。 鋳込成型時のスラリー粘度が1.8より大きくなると、巨
大気泡の数が増大し、表面の美感を損ねる。逆に、スラ
リー粘度が1.3未満になると、建材として必要な物性の
一つである圧縮強度の4OKg/cm2を確保できない。 なお、鋳込成型時の水と固体の比（W/S）は、0.67〜0.7
3が望ましく、鋳込温度は38〜45℃が望ましい。 本発明の方法において、スラリー粘度を低下させること
により、巨大気泡が大幅に減少するのは、スラリー粘度
が高いと、ミキサーによる撹拌時に巻き込んだ空気が脱
泡しにくく、製品の表面に巨大気泡となって現れるから
である。 第１図に、ALC原料として珪石、生石灰、普通ポルトラ
ンドセメントを種々の割合で配合して顔料スラリーを作
り、この原料スラリーの鋳込温度および鋳込粘度を変化
させて鋳込んだ時のスラリーの鋳込粘度（Ｐ）と製品表
面の長径が5mm以上の巨大気泡の数（巨大気泡数、個/
m2）の関係を示した。 この図から原料配合や鋳込温度に拘らず、巨大気泡数と
鋳込粘度には相関性があることがわかる。すなわち鋳込
粘度の上昇に伴って巨大気泡数が増加する。In the present invention, the viscosity of the raw material slurry at the time of cast molding
The reason is as follows: 1.8P or less and 1.3P or more. If the slurry viscosity during casting is higher than 1.8, the number of giant bubbles will increase and the surface aesthetics will be impaired. On the other hand, if the slurry viscosity is less than 1.3, it is not possible to secure the compressive strength of 4 OKg / cm 2 , which is one of the physical properties required as a building material. The ratio of water to solid (W / S) during casting is 0.67 to 0.7.
3 is desirable, and the casting temperature is desirably 38 to 45 ° C. In the method of the present invention, by reducing the viscosity of the slurry, the giant bubbles are significantly reduced.When the slurry viscosity is high, the air entrained during stirring by the mixer is difficult to defoam, and the giant bubbles are formed on the surface of the product. Because it appears. Fig. 1 shows a mixture of silica stone, quick lime, and ordinary Portland cement as ALC raw materials at various ratios to form a pigment slurry, and the slurry temperature when cast by changing the casting temperature and casting viscosity of this raw material slurry. Number of giant bubbles with a casting viscosity (P) and a major axis of the product surface of 5 mm or more (number of giant bubbles, number /
m 2 ). From this figure, it can be seen that there is a correlation between the number of giant bubbles and the casting viscosity regardless of the raw material composition and the casting temperature. That is, the number of giant bubbles increases as the casting viscosity increases.
実施例NO.1〜NO.7 第１表に示すように石灰質原料として普通ポルトランド
セメント及び生石灰粉末の所定量と、珪酸質原料として
珪石粉末の所定量を用い、これに外割りで固体量の67〜
73重量％の水を加えて、吐出流量が30〜40m3/minのミキ
サーで原料スラリーを調整した。この原料スラリーを38
〜50℃に保持し、かつスラリーの粘度を1.3〜2.9Pの範
囲に調整して、アルミニウム粉末からなる発泡剤を加え
て、大きさが6.0m長×1.5m幅×0.6mの鋳型に原料スラリ
ーを流し込んで発泡半硬化させた。硬化した成形品をピ
アノ線で厚さ10cmに切断した後、オートクレープ養生を
行い、製品の各々について鋳込時のスラリー粘度に対応
した製品表面の巨大気泡数を計測した。巨大気泡数を計
測する製品表面は、製品のいずれか一方の側からランダ
ムに20m2を選んだ。本実施例におけるALC原料の調合割
合、圧縮強度並びに巨大気泡数の結果を第１表に示す。
第１表には従来例（NO.8〜NO.10）も示してある。な
お、圧縮強度の測定はJIS Ａ−5416によった。 第１表の結果から本発明方法によって得られた製品の表
面積1m2当たりの巨大気泡数は、本発明の粘度範囲内
で、大幅に減少していることが判る。Examples NO.1 to NO.7 As shown in Table 1, a predetermined amount of ordinary Portland cement and quicklime powder as a calcareous raw material and a predetermined amount of silica stone powder as a siliceous raw material were used. 67 ~
73% by weight of water was added, and the raw material slurry was adjusted with a mixer having a discharge flow rate of 30 to 40 m 3 / min. 38 of this raw material slurry
Hold at ~ 50 ℃, adjust the viscosity of the slurry in the range of 1.3 ~ 2.9P, add a foaming agent made of aluminum powder, and make a raw material into a mold with a size of 6.0 m long × 1.5 m width × 0.6 m. The slurry was cast to foam and semi-cure. After the cured molded product was cut to a thickness of 10 cm with a piano wire, autoclave curing was performed, and the number of giant bubbles on the product surface corresponding to the slurry viscosity at the time of casting was measured for each product. The product surface for measuring the number of giant bubbles was randomly selected 20 m 2 from either side of the product. Table 1 shows the results of the mixing ratio of the ALC raw material, the compressive strength, and the number of giant bubbles in this example.
Table 1 also shows conventional examples (NO.8 to NO.10). The compression strength was measured according to JIS A-5416. From the results in Table 1, it can be seen that the number of giant bubbles per 1 m 2 of surface area of the product obtained by the method of the present invention is significantly reduced within the viscosity range of the present invention.
【発明の効果】 本発明は以上のように構成されているので、ALC製品と
しての充分な圧縮強度を保持しつつ、ALC製品の巨大気
泡数が減少し、表面の美感を改善したALC製品を製造す
ることができる。EFFECTS OF THE INVENTION Since the present invention is configured as described above, it is possible to provide an ALC product in which the number of giant bubbles of the ALC product is reduced and the aesthetic appearance of the surface is improved while maintaining sufficient compressive strength as the ALC product. It can be manufactured.
第１図はALC原料スラリーの鋳込時の粘度と製品の巨大
気泡数との関係を示す図である。FIG. 1 is a diagram showing the relationship between the viscosity of ALC raw material slurry during casting and the number of giant bubbles in the product.
Claims (1)
と、少なくとも珪石あるいは珪砂よりなる珪酸質原料、
アルミニウム粉末からなる発泡剤、及び水を主要原料と
する水蒸気養生軽量気泡コンクリートの製造方法におい
て、石灰質原料と珪酸質原料と添加剤と水からなる原料
スラリーの粘度が1.8P以下1.3P以上であることを特徴と
する水蒸気養生軽量気泡コンクリートの製造方法。1. A calcareous raw material composed of cement and quicklime, and a siliceous raw material composed of at least silica stone or silica sand,
In a method for producing a steam-curing lightweight aerated concrete that uses aluminum powder as a foaming agent and water as a main raw material, the viscosity of a raw material slurry that includes a calcareous raw material, a siliceous raw material, an additive, and water is 1.8P or less and 1.3P or more. A method for producing a steam-cured lightweight cellular concrete, which is characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017892A JPH07115965B2 (en) | 1990-01-30 | 1990-01-30 | Method for manufacturing steam-cured lightweight cellular concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017892A JPH07115965B2 (en) | 1990-01-30 | 1990-01-30 | Method for manufacturing steam-cured lightweight cellular concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03223185A JPH03223185A (en) | 1991-10-02 |
| JPH07115965B2 true JPH07115965B2 (en) | 1995-12-13 |
Family
ID=11956372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2017892A Expired - Lifetime JPH07115965B2 (en) | 1990-01-30 | 1990-01-30 | Method for manufacturing steam-cured lightweight cellular concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07115965B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100309550B1 (en) * | 1998-10-30 | 2001-11-07 | 가다야마 세이지 | The concrete contained soluable slurry which consist of calcium bicarbonate. |
| KR20030061983A (en) * | 2002-01-14 | 2003-07-23 | 대신콘크리트 주식회사 | Lightweight bubble artificial stone using foam and its manufacturing method |
-
1990
- 1990-01-30 JP JP2017892A patent/JPH07115965B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03223185A (en) | 1991-10-02 |
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