JP3270145B2 - Lightweight aerated concrete panel - Google Patents

Lightweight aerated concrete panel

Info

Publication number
JP3270145B2
JP3270145B2 JP27267192A JP27267192A JP3270145B2 JP 3270145 B2 JP3270145 B2 JP 3270145B2 JP 27267192 A JP27267192 A JP 27267192A JP 27267192 A JP27267192 A JP 27267192A JP 3270145 B2 JP3270145 B2 JP 3270145B2
Authority
JP
Japan
Prior art keywords
alc
panel
concrete panel
drying shrinkage
silica
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
Application number
JP27267192A
Other languages
Japanese (ja)
Other versions
JPH06122572A (en
Inventor
義雄 大熊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asahi Kasei Corp
Original Assignee
Asahi Kasei Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Application filed by Asahi Kasei Corp filed Critical Asahi Kasei Corp
Priority to JP27267192A priority Critical patent/JP3270145B2/en
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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
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • 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
    • C04B2111/23—Acid resistance, e.g. against acid air or rain

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Porous Artificial Stone Or Porous Ceramic Products (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】本発明は軽量気泡コンクリートパ
ネル（以下ＡＬＣパネルという）に関し、特に圧縮強度
を維持しながら乾燥収縮率の低いＡＬＣパネルに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightweight cellular concrete panel (hereinafter, referred to as an ALC panel), and more particularly to an ALC panel having a low drying shrinkage while maintaining compressive strength.

【０００２】[0002]

【従来の技術】ＡＬＣパネルは一般にセメント、珪石粉
を主原料とし、これに必要により生石灰粉、石膏等を加
え、水を添加してスラリー状とし、型枠で成形してオー
トクレーブ養生することによって作られる。ＡＬＣパネ
ルの物性、例えば乾燥収縮率（ＪＩＳ Ａ５４１６に規
定された長さ変化率をいう。以下同じ）や強度のような
物性を向上するためには、上記原料の選択および組成が
重要である。通常採用されている原料は、石英結晶粒径
が２〜１０００μｍの珪石を粉砕して得た２６００〜３
６００ｃｍ2 ／ｇのブレーン比表面積を有する珪石粉
に、セメント、生石灰、石膏等を混合したものである。
代表的な組成としては生石灰を０〜１５ｗｔ％、セメン
トを２０〜５０ｗｔ％、石膏を２〜３ｗｔ％、残りを珪
石粉とし、かつ配合Ｃ／Ｓ（ＣａＯ／ＳｉＯ2 モル比）
を通常０．４〜０．７程度としている。また，水および
起泡剤等を添加して製品パネルの比重を通常０．５程度
とする。起泡導入としてはプレフォーム方式の場合は泡
形成剤を使用し、ＡＬＣの場合は通常金属アルミニウム
等の発泡剤を使用する。2. Description of the Related Art ALC panels are generally made of cement or silica powder as a main raw material, to which quicklime powder, gypsum or the like is added as necessary, and water is added to form a slurry, which is then molded in a mold and autoclaved. Made. In order to improve the physical properties of the ALC panel, for example, the properties such as the drying shrinkage rate (length change rate defined in JIS A5416; the same applies hereinafter) and the strength, the selection and composition of the above raw materials are important. Raw materials usually employed are 2600 to 3 obtained by grinding silica having a quartz crystal particle size of 2 to 1000 μm.
It is obtained by mixing silica, quicklime, gypsum and the like with silica powder having a brane specific surface area of 600 cm 2 / g.
0 to 15 wt% of quicklime as a typical composition, cement 20 to 50 wt%, gypsum 2～3Wt%, the remainder as silica powder, and blending C / S (CaO / SiO 2 molar ratio)
Is usually about 0.4 to 0.7. The specific gravity of the product panel is usually set to about 0.5 by adding water and a foaming agent. For foaming, a foaming agent is used in the case of the preform method, and a foaming agent such as metallic aluminum is usually used in the case of ALC.

【０００３】このような組成で作られた従来のＡＬＣパ
ネルの乾燥収縮率は５×１０-4以下程度で圧縮強度は３
０から４５Ｋｇｆ／ｃｍ2 程度である。（なお乾燥収縮
率および圧縮強度はＪＩＳ Ａ５４１６による。以下同
じ）A conventional ALC panel made of such a composition has a drying shrinkage of about 5 × 10 −4 or less and a compressive strength of 3 × 10 −4.
It is about 0 to 45 kgf / cm 2 . (The drying shrinkage and the compressive strength are based on JIS A5416. The same applies hereinafter.)

【０００４】[0004]

【発明が解決しようとする課題】しかしながら、近年Ａ
ＬＣパネルに要求される性能はますます厳しくなってお
り、このような従来のＡＬＣパネルの物性、特にその乾
燥収縮率においては要求に応えるには不充分となってき
ている。そこで本発明は、従来のＡＬＣパネルにおける
圧縮強度等の他の物性を損なうことなく、その乾燥収縮
率が著しく向上したＡＬＣパネルを提供することを課題
とするものである。However, in recent years, A
The performance required of LC panels is becoming increasingly severe, and the physical properties of such conventional ALC panels, especially the drying shrinkage, are becoming insufficient to meet the requirements. Accordingly, an object of the present invention is to provide an ALC panel in which the drying shrinkage is significantly improved without impairing other physical properties such as the compressive strength of the conventional ALC panel.

【０００５】[0005]

【課題を解決するための手段】前記課題を達成するため
の本発明のＡＬＣパネルは、セメント、珪石粉を主原料
として作られたＡＬＣパネルであって、該パネル中の未
反応珪石の含有量が２０〜４５ｗｔ％、後に定義する有
機酸溶解残量が６５％以上であることを特徴とするもの
である。An ALC panel according to the present invention for achieving the above object is an ALC panel made from cement and silica powder as a main raw material, and contains unreacted silica in the panel. Is 20 to 45% by weight, and an organic acid dissolution remaining amount defined later is 65% or more.

【０００６】以下本発明を詳細に説明する。本発明のＡ
ＬＣパネルを製造するために重要な要件の一つは用いる
原料珪石粉の性状である。すなわち適度の石英結晶粒径
を有し、そのブレーン比表面積が規定の値の範囲を有す
るものを使用する必要がある。好ましい珪石粉は石英結
晶粒径が１００μｍ以上を実質的に含まず、２０〜１０
０μｍのものを５０ｗｔ％以上含み、且つブレーン比表
面積（ＪＩＳ Ｒ５２０１による）が１８００ｃｍ2／
ｇ以上２５００ｃｍ2 ／ｇ未満程度のものである。Hereinafter, the present invention will be described in detail. A of the present invention
One of the important requirements for manufacturing an LC panel is the properties of the raw silica powder used. That is, it is necessary to use a quartz crystal having an appropriate quartz crystal grain diameter and having a specific surface area of the brane within a specified range. Preferred silica powder has a quartz crystal particle size of substantially not more than 100 μm,
0 wt.% Or more and having a Blaine specific surface area (according to JIS R5201) of 1800 cm 2 /
g and less than 2500 cm 2 / g.

【０００７】本発明のＡＬＣパネルを製造する場合、生
石灰０〜１５ｗｔ％、セメントを２０〜５０ｗｔ％、石
膏を２〜３ｗｔ％程度、残りを上記珪石粉とすることが
好ましく、かつＣ／Ｓモル比が０．４〜０．６程度とな
るようにする。このような原料および配合とすることに
より、製造されるＡＬＣパネルにおけるセメントおよび
珪石に由来するＡｌ2 Ｏ3 含有量は２．５〜４ｗｔ％程
度になり、有機酸溶解残量を向上させる上で好ましい。When the ALC panel of the present invention is manufactured, it is preferable that the quicklime is 0 to 15 wt%, the cement is about 20 to 50 wt%, the gypsum is about 2 to 3 wt%, and the remainder is the above-mentioned silica powder, and the C / S mol The ratio is set to be about 0.4 to 0.6. By using such raw materials and blending, the content of Al 2 O 3 derived from cement and silica in the manufactured ALC panel becomes about 2.5 to 4 wt%, and in order to improve the residual amount of dissolved organic acids. preferable.

【０００８】上記のような原料組成のものに適宜の粘性
になるように水を加えてスラリーとし、ＡＬＣパネルの
比重が０．５程度になるように気泡剤、例えば金属アル
ミニウム粉等の発泡剤を適宜添加する。次にこのスラリ
ーを成形用の型枠に流し込み、半硬化状態でピアノ線等
により所定寸法に切断後、オートクレーブ養生して製品
とする。オートクレーブの養生条件は通常約１８０℃、
１０Ｋｇ／ｃｍ2 Ｇの範囲で５〜６時間程度行う。[0008] A slurry is prepared by adding water to the above raw material composition so as to have an appropriate viscosity, and a foaming agent such as a foaming agent such as metallic aluminum powder so that the specific gravity of the ALC panel becomes about 0.5. Is added as appropriate. Next, the slurry is poured into a molding frame, cut into predetermined dimensions with a piano wire or the like in a semi-cured state, and then autoclaved to obtain a product. The curing condition of the autoclave is usually about 180 ° C,
The treatment is performed in the range of 10 kg / cm 2 G for about 5 to 6 hours.

【０００９】本発明のＡＬＣパネルは、それに含まれる
未反応珪石が２０〜４５ｗｔ％、好ましくは２５〜４０
ｗｔ％になされる。未反応珪石が２０ｗｔ％より少ない
と乾燥収縮率が大きくなり、また、４５ｗｔ％より大き
くなると圧縮強度が低下してくる傾向になるので好まし
くない。また、その有機酸溶解残量は６５％以上、好ま
しくは７０％以上、更に好ましくは７５％以上とされ
る。この値が６５％より低下すると乾燥収縮率の点で好
ましくない。なおこの値は高いほど好ましい傾向にある
が、オートクレーブでの養生時間が長くなる等の理由か
ら、実用的には９０％程度に上限を押さえることが好ま
しい。なおここで有機酸溶解残量は次の式で算出される
値である。In the ALC panel of the present invention, the unreacted silica contained therein is 20 to 45 wt%, preferably 25 to 40 wt%.
wt%. If the amount of unreacted silica is less than 20% by weight, the drying shrinkage increases, and if it is more than 45% by weight, the compressive strength tends to decrease. Further, the residual amount of the organic acid dissolved is 65% or more, preferably 70% or more, and more preferably 75% or more. If this value is lower than 65%, it is not preferable in terms of drying shrinkage. The higher this value is, the more preferable it is. However, it is practically preferable to keep the upper limit at about 90% because the curing time in an autoclave becomes longer. Here, the residual amount of dissolved organic acid is a value calculated by the following equation.

【００１０】有機酸溶解残量％＝（ピクリン酸溶解残量
ｗｔ％−塩酸溶解残量ｗｔ％）×１００／（１００−塩
酸溶解残量ｗｔ％） なお、上記酸塩酸溶解残量は未反応珪石量に相当し、ピ
クリン酸溶解残量は常温でピクリン酸３％メタノール溶
液で３時間処理したもので、非結晶トバモライトを溶解
した残量に相当する。[0010] Organic acid dissolved residual amount% = (picric acid dissolved residual amount wt%-hydrochloric acid dissolved residual amount wt%) x 100 / (100-hydrochloric acid dissolved residual amount wt%) The above acid acid dissolved residual amount is unreacted. The remaining amount of picric acid dissolved is equivalent to the amount of dissolving amorphous tobermorite at room temperature for 3 hours after treatment with a 3% methanol solution of picric acid.

【００１１】このような本発明のＡＬＣパネルは、圧縮
強度等の他の物性を低下させることなく、その乾燥収縮
率を向上させることができる。すなわち本発明のＡＬＣ
パネルの乾燥収縮率は従来のＡＬＣパネルの値より大幅
に低くなり、その値はおよそ２．５×１０-4以下程度と
なる。また、その圧縮強度はおよそ３５〜４５Ｋｇｆ／
ｃｍ2 程度のレベルである。The ALC panel of the present invention can improve the drying shrinkage without lowering other properties such as compressive strength. That is, the ALC of the present invention
The drying shrinkage of the panel is significantly lower than that of the conventional ALC panel, and the value is about 2.5 × 10 −4 or less. The compressive strength is about 35 to 45 kgf /
It is on the order of cm 2 .

【００１２】[0012]

【実施例】次に本発明の実施例を説明する。Next, embodiments of the present invention will be described.

【００１３】[0013]

【実施例１〜５および比較例１】表１に示す各原料と組
成比で配合して各種のスラリーを調整し、それらをＡＬ
Ｃ製造用の型枠にそれぞれ流し込み、半硬化させた後ピ
アノ線で所定形状に切断した。つぎにこれらの各成形体
をオートクレーブで１８０℃、１０Ｋｇ／ｃｍ2Ｇ、４
時間水熱養生して実施例および比較例のＡＬＣパネルを
作った。これらＡＬＣパネルの諸物性を表２に示す。Examples 1 to 5 and Comparative Example 1 Various slurries were prepared by blending with the respective raw materials shown in Table 1 in a composition ratio, and these were subjected to AL.
C was poured into molds for production, semi-cured, and then cut into a predetermined shape with a piano wire. Next, each of these compacts was autoclaved at 180 ° C., 10 kg / cm 2 G,
ALC panels of Examples and Comparative Examples were prepared by hydrothermal curing for hours. Table 2 shows the physical properties of these ALC panels.

【００１４】[0014]

【表１】 [Table 1]

【００１５】[0015]

【表２】 [Table 2]

【００１６】表２から明らかなように、有機酸残量が大
きいものは乾燥収縮率および圧縮強度が向上している。As is clear from Table 2, those having a large residual amount of organic acid have improved drying shrinkage and compressive strength.

【００１７】[0017]

【実施例５〜１２および比較例２〜３】各原料を表３に
示す組成比で配合し、スラリーとしてそれらをＡＬＣ製
造用の型枠にそれぞれ流し込み、半硬化させた後ピアノ
線で所定形状に切断した。つぎにこれらの各成形体をオ
ートクレーブで１８０℃、１０Ｋｇ／ｃｍ2 Ｇ、５時間
水熱養生して実施例および比較例のＡＬＣパネルを作っ
た。これらＡＬＣパネルの諸物性を表４に示す。Examples 5 to 12 and Comparative Examples 2 to 3 Each raw material was blended in the composition ratio shown in Table 3, and each was poured as a slurry into a mold for ALC production, semi-cured, and then formed into a predetermined shape with a piano wire. Cut into pieces. Next, each of these molded bodies was hydrothermally cured in an autoclave at 180 ° C., 10 kg / cm 2 G, for 5 hours to produce ALC panels of Examples and Comparative Examples. Table 4 shows the physical properties of these ALC panels.

【００１８】[0018]

【表３】 [Table 3]

【００１９】[0019]

【表４】 [Table 4]

【００２０】表４から明らかなように、未反応珪石の含
有量が低いものは、乾燥収縮率が悪化している。また、
未反応珪石の含有量が高いものは、圧縮強度が悪化する
と共に、乾燥収縮率は向上する傾向にある。As is clear from Table 4, those having a low content of unreacted silica have a poor drying shrinkage. Also,
When the content of unreacted silica is high, the compressive strength tends to deteriorate and the drying shrinkage tends to increase.

【００２１】[0021]

【発明の効果】本発明のＡＬＣパネルは以上のような構
成とすることにより、圧縮強度を維持しつつ乾燥収縮率
を従来より大幅に向上することができる。According to the ALC panel of the present invention having the above-described structure, the drying shrinkage can be greatly improved while maintaining the compressive strength.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 セメント、珪石粉を主原料として作られ
た軽量気泡コンクリートパネルにおいて、該パネル中の
未反応珪石の含有量が２０〜４５ｗｔ％、下記において
定義する有機酸溶解残量が６５％以上であることを特徴
とする軽量気泡コンクリートパネル。有機酸溶解残量％＝（ピクリン酸溶解残量ｗｔ％−塩酸溶解残量ｗｔ％）×１０ ０／（１００−塩酸溶解残量ｗｔ％） 1. A cement in the lightweight cellular concrete panel made of silica powder as the main raw material, 20 to 45 wt% content of unreacted silica in said panel, an organic acid dissolution remaining to Oite defined below A lightweight cellular concrete panel characterized by being 65% or more. Organic acid dissolution residual amount% = (picric acid dissolving residual wt% -hydrochloric acid dissolving residual wt%) × 100 / (100-hydrochloric acid dissolving residual wt%)
JP27267192A 1992-10-12 1992-10-12 Lightweight aerated concrete panel Expired - Lifetime JP3270145B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27267192A JP3270145B2 (en) 1992-10-12 1992-10-12 Lightweight aerated concrete panel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27267192A JP3270145B2 (en) 1992-10-12 1992-10-12 Lightweight aerated concrete panel

Publications (2)

Publication Number Publication Date
JPH06122572A JPH06122572A (en) 1994-05-06
JP3270145B2 true JP3270145B2 (en) 2002-04-02

Family

ID=17517172

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27267192A Expired - Lifetime JP3270145B2 (en) 1992-10-12 1992-10-12 Lightweight aerated concrete panel

Country Status (1)

Country Link
JP (1) JP3270145B2 (en)

Also Published As

Publication number Publication date
JPH06122572A (en) 1994-05-06

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