JPS59203750A - Manufacture of alc - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 本発明は、ＡＬＣ（高温高圧蒸気養生した軽量気泡コン
クリート）の製法に関し、更に詳しくは曲げ強度の改良
されたＡＬＣを製造する方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing ALC (lightweight cellular concrete cured with high temperature and high pressure steam), and more particularly to a method for manufacturing ALC with improved bending strength.

近年、ＡＬＣはその優れた軽量性・耐火性・強度特性な
どにより建築の各分野に急速に普及しつつある。しかし
、ＡＬＣ自体の有する曲げ特性や脆性などの点が充分に
は高くなく、それ故に使用を妨げられている分野も存在
する。In recent years, ALC is rapidly becoming popular in various fields of construction due to its excellent lightness, fire resistance, and strength characteristics. However, the bending properties and brittleness of ALC itself are not sufficiently high, and therefore, there are some fields in which its use is prevented.

本発明者は、繊維の混入や鋼材などの補強材により曲げ
強度を増強する以外に、ＡＬＣ本体を構成する硅酸カル
シウム水和物を改質することによっても曲げ強度が改良
できるのではないかと長年にわたって鋭意研究を重ねて
きた結果、本発明を完成したのである。In addition to increasing the bending strength by incorporating fibers or reinforcing materials such as steel, the present inventors believe that the bending strength may be improved by modifying the calcium silicate hydrate that constitutes the ALC main body. As a result of many years of intensive research, the present invention was completed.

本発明は、ＡＬＣの製法に於て、主として硅酸質原料と
石灰質原料とからなる原料スラリー中に、硅酸質原料粉
末の８１０２量に対して５〜１５モルチの消石灰を予め
粉末状で混合した主として硅酸質原料と石灰質原料とか
らなる混合物を粉末状のまま高温高圧蒸気養生した養生
物を、存在させることを特徴とするＡＬＣの製造方法で
ある。In the production method of ALC, the present invention is characterized in that slaked lime of 5 to 15 moles is mixed in powder form in advance with respect to the amount of 8102 siliceous raw material powder into a raw material slurry mainly consisting of siliceous raw material and calcareous raw material. This is a method for producing ALC characterized by the presence of a curing agent obtained by curing a mixture mainly consisting of a siliceous raw material and a calcareous raw material in powder form with high-temperature, high-pressure steam.

本発明においては、硼砂や砂石の粉末などの硅酸質原料
と消石灰を、５ｌｏ２／Ｃａ（ＯＲ）を比で０．０５〜
０．１５となるような使用量比で予め粉末状で混合し、
場合によっては、少量のセメント粉を添加し、その後粉
末状でその混合物を高温高圧蒸気養生した養生物（以下
、これを粉末養生物という）を、好ましくはＡＬＣスラ
リー中に均一に分散できるように粉砕して、ＡＬＣスラ
リー中に添加存在させる点に特徴がある。In the present invention, silicate raw materials such as borax and sandstone powder and slaked lime are used at a ratio of 5lo2/Ca (OR) of 0.05 to 0.05.
Mix in advance in powder form at a usage ratio of 0.15,
In some cases, a small amount of cement powder is added, and the mixture is then cured in powder form using high-temperature, high-pressure steam (hereinafter referred to as powdered curing agent), preferably so as to be uniformly dispersed in the ALC slurry. It is characterized in that it is pulverized and added to the ALC slurry.

ここでＡＬＣスラリーとは通常用いられるスラリーで、
砕砂や砂石の粉末などの硅酸質原料と生石灰、消石灰、
セメントなどの石灰質原料とから主としてなるものであ
り、これにＡｔ粉などの副原料と必要量の水とを加えて
なるＡＬＣス２リーであり粉末養生物のＡＬＣスラリー
への存在方法は、硅酸質原料と混合して添加しても、石
灰質原料と混合して添加しても、硅酸質原料と石灰質原
料との混合スラリーに添加してもよく、要するに、ＡＬ
Ｃスラリー中に粉末養生物が存在しておればよい０ 粉末養生物の添加量は、通常のＡＬＣ原料スラリー中の
固形分に対し重量でｓｑ６〜６５％好ましくは１０〜４
０チ添加すれば、本発明の効果、即ち曲げ特性の向上効
果が示される。Here, ALC slurry is a commonly used slurry,
Silica raw materials such as crushed sand and sandstone powder, quicklime, slaked lime,
ALC slurry is mainly composed of calcareous raw materials such as cement, to which are added auxiliary raw materials such as At powder and the necessary amount of water. AL
It is sufficient that the powdered curing agent is present in the C slurry0 The amount of the powdered curing agent added is 6 to 65% by weight of the solid content in the normal ALC raw material slurry, preferably 10 to 4 sq.
When 0% is added, the effect of the present invention, that is, the effect of improving bending properties is exhibited.

寿おＡＬＣの原料スラリーは、粉末養生物の添加量によ
っては、粉末養生物添加後のスラリー中のＣａ０７８１
０ｗ比が、ＡＬＣ原料スラリーのＣａ０７８１０ｇ比が
０．３〜１．０、より好ましくは０．５〜Ｏ，Ｓとなる
ようにしてもさしつかえない。The raw material slurry for Kotobuki ALC may contain Ca0781 in the slurry after adding the powdered curing agent depending on the amount of the powdered curing agent added.
The 0w ratio may be such that the Ca07810g ratio of the ALC raw material slurry is 0.3 to 1.0, more preferably 0.5 to O,S.

また、粉末養生物の製法に於て、消石灰の使用量を８１
０２量に対して５〜１５モルチ、特に好ましくは１０モ
ルチ前後と限定したのは、この範囲に於て得られるＡＬ
ＣＭ品の曲げ強度の向上が顕著であるからである。In addition, the amount of slaked lime used in the manufacturing method of powdered curing fluid was increased to 81%.
The reason why the AL obtained in this range is limited to 5 to 15 molti, particularly preferably around 10 molti, based on the amount of 0.02
This is because the bending strength of CM products is significantly improved.

本発明に従えば、このような粉末養生物を添加した原料
スラリーを型枠に注入し、取扱いに必要な硬度になった
後、必要ならばピアノ線などで所望の形状に切断し、Ａ
ＬＣの製造方法に用いられる高温高圧蒸気養生して製品
となるのである。According to the present invention, the raw material slurry to which such powdered curing agent has been added is injected into a mold, and after reaching the hardness required for handling, if necessary, it is cut into a desired shape with piano wire or the like, and A
The product is cured using high-temperature, high-pressure steam used in the LC manufacturing method.

このようにして得られたＡＬＣが何故に曲げ強度が向上
するか不明であるが、本発明に用いる粉末養生物に代え
て、砂石と消石灰とからなる混合物に水を加えてスラリ
ーとした後に、高温高圧蒸気養生したものを粉砕してＡ
ＬＣ原料に添加してＡＬＣを製造しても曲げ強度は殆ん
ど向上しない。It is unclear why the bending strength of the ALC obtained in this way is improved, but instead of the powdered curing agent used in the present invention, water is added to a mixture of sandstone and slaked lime to form a slurry. , crushed by high temperature and high pressure steam curing.
Even if ALC is produced by adding it to the LC raw material, the bending strength hardly improves.

このことをより明確に示すために以下に実施例を示す。Examples are shown below to demonstrate this more clearly.

実施例１ 硅石粉と、そのＳｉＯ２量に対し１０モル多量の消石灰
粉とをよく混合し、乾燥粉末状のまま１０気圧（１８０
℃）の飽和水蒸気で１０時間養生した養生物を粉砕して
得た粉状物を、ＡＬＣ成型用混合物、即ち硅石粉６０重
量部、生石灰１５重量部、セメン）２０重量部、石膏５
重量部の混合物１００重量部に対して、２０重量部添加
して、水７０重量部を用いたスラリーとし、Ａｔ粉を加
えて型枠に注入し、発泡させ半硬化させた。半硬化後に
オートクレーブに入れ、１０気圧（１８０℃）の飽和水
蒸気によって約１８時間養生して硬化を完了させた。得
られたＡＬＣの物性は、気乾比重０．５５　、曲げ強度
１９．６　Ｋ９／ａｄ　、　圧縮強度４０．５　Ｋｙ／
ｌ：ｙｌであった（比較例１ 実施例１の粉末養生品の代シに、水を加えてスラリー状
とした後、１０気圧（１８０℃）の飽和水蒸気で養生し
たものを粉砕して得たものを用いて実施例１と同じよう
に処理した０この成型物の物性は、気乾比重０．５５、
曲げ強度１０．９　Ｋｇ／ｃｔｌ　、圧縮強度４０．３
　Ｋｙ／−であった。Example 1 Silica powder and slaked lime powder in an amount of 10 moles more than the amount of SiO2 were mixed well, and the mixture was heated to 10 atm (180
The powder obtained by pulverizing the cured material after curing in saturated steam for 10 hours at ) was mixed into an ALC molding mixture, that is, 60 parts by weight of silica powder, 15 parts by weight of quicklime, 20 parts by weight of cement, and 5 parts by weight of gypsum.
To 100 parts by weight of the mixture, 20 parts by weight were added to form a slurry using 70 parts by weight of water, At powder was added thereto, the mixture was poured into a mold, and foamed and semi-cured. After semi-curing, it was placed in an autoclave and cured in saturated steam at 10 atm (180° C.) for about 18 hours to complete curing. The physical properties of the obtained ALC are: air dry specific gravity 0.55, bending strength 19.6 K9/ad, compressive strength 40.5 Ky/
l:yl (Comparative Example 1) Water was added to the powdered curing product of Example 1 to form a slurry, and the slurry was cured with saturated steam at 10 atm (180°C). The physical properties of the molded product were as follows: air-dry specific gravity: 0.55;
Bending strength: 10.9 Kg/ctl, compressive strength: 40.3
It was Ky/-.

比較例２ 実施例１の粉末養生品を用いずに、実施例！記載のＡＬ
Ｃ成型用混合物のみで実施例１と同じ条件で処理した製
品の物性は、気乾比重０．５５、曲げ強度１１．１　Ｋ
ｇ／ｃｔｌ、　　圧縮強度４０．０　Ｋｑ／−であった
。Comparative Example 2 Example without using the powder curing product of Example 1! AL listed
The physical properties of the product processed using only the C molding mixture under the same conditions as in Example 1 were: air-dried specific gravity 0.55 and bending strength 11.1 K.
g/ctl, and the compressive strength was 40.0 Kq/-.

実施例２ 硅石粉とその８１０２量に対し６モルチ量の消石灰粉と
をよく混合し、乾燥粉末状で１０気圧（１８０℃）の飽
和水蒸気で１２時間養生した養生物を粉砕して得た粉状
物を、実施例１のＡＬＣ成型用混合物１００重量部に対
して５０重量部添加して用いた他は、実施例１と同じ条
件で処理した。得られたＡＬＣの物性は気乾比重０．５
８、曲げ強度１７．８Ｋｆ／ｃｊＩ、圧縮強度４０．６
　Ｋｇ／ｃｄであった。Example 2 A powder obtained by thoroughly mixing silica powder and slaked lime powder in an amount of 6 molt per 8102 of the powder, curing the dry powder in saturated steam at 10 atm (180°C) for 12 hours, and pulverizing the cured product. The treatment was carried out under the same conditions as in Example 1, except that 50 parts by weight of the mixture was added to 100 parts by weight of the ALC molding mixture of Example 1. The physical properties of the obtained ALC are air dry specific gravity 0.5
8. Bending strength 17.8 Kf/cjI, compressive strength 40.6
Kg/cd.

実施例３ 硅石粉とその８１０２量に対し、１４モル多量の消石灰
粉とをよく混合し、乾燥粉末状で１６０℃の飽和水蒸気
で８時間養生したものを粉砕して得た粉状養生物を、実
施例１の通常の気泡コンクＩＪ　＋ト成型用混合物１０
０重量部に対して８重量部添加して用いた他は実施例１
と同じ条件で処理した。Example 3 A powdered cured product was obtained by thoroughly mixing silica powder and slaked lime powder in an amount of 14 moles per 8102 of the powder, curing in dry powder form for 8 hours in saturated steam at 160°C, and pulverizing the resulting product. , ordinary foam concrete IJ + to molding mixture 10 of Example 1
Example 1 except that 8 parts by weight was added to 0 parts by weight.
treated under the same conditions.

得られた製品の物性は気乾比重０．５５、曲げ強度１６
．４　Ｋｇ／ｄｉ圧縮強度４０．３　Ｋｇ／ａｔｌであ
った。The physical properties of the obtained product are air-dried specific gravity 0.55 and bending strength 16.
．． 4 Kg/di compressive strength was 40.3 Kg/atl.

比較例３ 砕石粉とそのｓｉ　ｏ２世に対し４０モル多量の消石灰
粉とをよく混合し、乾燥粉末状で１５０℃の飽和水蒸気
で８時間養生したものを粉砕して得た粉状養生物を、実
施例１０通常の気泡コンクリート成型用混合物１００重
量部に対しｘｏｆｉ量部添加して用いた他は実施例１と
同じ条件で処理した。しかし、得られた製品の物性は、
気乾比重０．５５　、曲げ強度１２．６〜／ｄｔ、　　
圧縮強度４０．１１（グ／−であシ、比較例１や比較例
２の曲げ強度より強くなるものの、実施例のＡＬＣ＃′
のように曲げ強度が１４　鞭ｒは越えなかった。Comparative Example 3 A powdered cured product obtained by thoroughly mixing crushed stone powder and slaked lime powder in an amount of 40 moles more than its sio2, and curing it in dry powder form for 8 hours in saturated steam at 150 ° C. Example 10 The treatment was carried out under the same conditions as in Example 1, except that xofi parts were added to 100 parts by weight of a conventional aerated concrete molding mixture. However, the physical properties of the obtained product are
Air dry specific gravity 0.55, bending strength 12.6~/dt,
Compressive strength: 40.11 (g/-), although it is stronger than the bending strength of Comparative Example 1 and Comparative Example 2, the ALC#' of Example
The bending strength did not exceed 14 r.

特許出願人　旭化成工業株式会社 ７一Patent applicant: Asahi Kasei Industries, Ltd. 71

Claims (1)

【特許請求の範囲】[Claims] ＡＬＣの製法に於て、主として硅酸質原料と石灰質原料
とからなる原料スラリーψに、硅酸質原料粉末の５ｉＯ
ｓｔ量に対し５〜１５モル−の消石灰を予め粉末状で混
合した主として硅酸質原料と石灰質原料とからなる混合
物を粉末状のまま高温高圧蒸気養生した養生物を、存在
させることを特徴とするＡＬＣの製法In the ALC manufacturing method, 5iO of siliceous raw material powder is added to the raw material slurry ψ mainly consisting of siliceous raw material and calcareous raw material.
It is characterized by the presence of a curing agent in which a mixture mainly consisting of a silicic raw material and a calcareous raw material is prepared by pre-mixing 5 to 15 moles of slaked lime in powder form with respect to the st amount, and is cured in powder form with high temperature and high pressure steam. ALC manufacturing method