JPH0246548B2 - - Google Patents

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Publication number
JPH0246548B2
JPH0246548B2 JP56000978A JP97881A JPH0246548B2 JP H0246548 B2 JPH0246548 B2 JP H0246548B2 JP 56000978 A JP56000978 A JP 56000978A JP 97881 A JP97881 A JP 97881A JP H0246548 B2 JPH0246548 B2 JP H0246548B2
Authority
JP
Japan
Prior art keywords
molded body
cellular concrete
water
lightweight cellular
silicone oil
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
JP56000978A
Other languages
Japanese (ja)
Other versions
JPS57118084A (en
Inventor
Hidehiro Tanaka
Chomei Nishioka
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.)
Denka Co Ltd
Original Assignee
Denki Kagaku Kogyo KK
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
Application filed by Denki Kagaku Kogyo KK filed Critical Denki Kagaku Kogyo KK
Priority to JP97881A priority Critical patent/JPS57118084A/en
Publication of JPS57118084A publication Critical patent/JPS57118084A/en
Publication of JPH0246548B2 publication Critical patent/JPH0246548B2/ja
Granted legal-status Critical Current

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Description

【発明の詳細な説明】[Detailed description of the invention]

本発明は耐水性に優れた軽量気泡コンクリート
成形体の製造法に関する。 従来、軽量気泡コンクリート成形体は、セメン
ト、石灰及び硅石粉末等を主原料とした原料スラ
リーと金属粉末や起泡剤等を混合し、気泡を混入
した後、高温高圧水蒸気養生を行つて製造してい
る。このようにして製造した軽量気泡コンクリー
ト成形体は、軽く、断熱性があり、施工が容易で
あるという利点がある。 その反面、吸水性が高く、耐凍結性に劣る、多
くの気孔を有するのでもろい、表面にできるペー
スト層などの強度が弱く、欠け易すい等の欠点が
あつた。これらを解決するために、塗料などの撥
水性を有する物質を、原料スラリー中に混入する
方法や軽量気泡コンクリート成形体の表面に塗布
する方法などが提案されている。しかしながら原
料スラリー中に混入する方法は、表面の気孔やペ
ースト層の強化は不可能で防水性能を得るには多
量混入する必要があり経済的でない上に混入され
た気泡が不安定になつたり、強度発現が悪るくな
つたりして目的の発泡体が得られなかつた。 また、軽量気泡コンクリート成形体表面に塗布
する方法は表面に傷がついたり、屋外では劣化し
たりして防水性能が損われてくる。 本発明は、これらを解決することを目的とする
ものであつて、成形体の表面にシリコーン油類を
塗布した後、オートクレーブ中で高温高圧水蒸気
養生することにより、耐水性を有し、かつ表面強
度が著しく向上する、耐水性に優れた軽量気泡コ
ンクリート成形体の製造法を提供しようとするも
のである。 即ち、本発明は、軽量気泡コンクリートを成形
し、該成形体表面にシリコーン油類を、1m2当り
100〜500c.c.塗布した後、高温高圧水蒸気養生する
ことを特徴とする軽量気泡コンクリート成形体の
製造法である。 以下さらに本発明を詳しく説明する。 本発明において軽量気泡コンクリート(以下気
泡コンという)とは、セメント、石灰等に、必要
に応じてシリカ系骨材を混和してなる原料スラリ
ーに、アルミニウム等の金属粉末や起泡剤等を混
合し、気泡を混入する一般的な方法により製造さ
れるものであつて、その手段は特に制限を受ける
ものではない。このような方法によつて製造され
た気泡コンを型枠に流し込み成形し、凝固硬化し
た後、必要に応じてピアノ線等で切断加工して成
形体とする。 成型体の表面に塗布するシリコーン油類として
は、一般的なシリコーン油でジメチルシロキサン
オイル、メチルフエニルシロキサンオイル、メチ
ルハイドロジエンシロキサンオイル、メチルシリ
コーンワニス又はフエニルメチルシリコーンワニ
ス又はこれらの変成体等が挙げられ、液状のもの
であればよい。その塗布方法としては一般的に行
なわれている刷毛塗り、スプレー塗装及び浸漬に
よる方法等が可能である。塗布量はその全面に塗
布できれば良く、通常1m2当り、約100〜500c.c.で
十分である。 次に高温高圧水蒸気養生(以下オートクレーブ
養生という)は一般的な条件を用いれば良く、通
常、圧力10Kg/cm2で温度180℃の飽和蒸気が用い
られるが、特に制限されるものではない。 本発明によつて製造された気泡コンは、水の浸
透が非常に少なくなり、耐水性が向上し、耐凍結
性に優れ、かつ表面強度が著しく向上し、欠け難
くなるものである。 以下実施例により説明する。 実施例 1 45重量部の普通ポルトランドセメントと55重量
部の硅石粉に水60重量部の水を混入撹拌して原料
スラリーを製造した。 その原料スラリーに起泡剤(フオーミツクスC
・ハマノ工業)を混合し気泡を混入し、容重
0.7g/c.c.の気泡コンを製造した。この気泡コン
を10×10×40cm型枠に流し込み、1日後型枠を脱
型し成形体を得た。成型体の表面にシリコーンオ
イル(トーレシリコーンSH200)を1m2当り200
c.c.になるよう全面に刷毛塗りした後オートクレー
ブに移し、昇温40℃/hr、最高圧10Kg/cm2、温度
180℃で8時間オートクレーブ養生を行なつた。
この防水性能りについて、成形体を水面下2cmと
なるように水中に浸漬して24時間放置した後の水
分吸収による重量増加を測定したところ、7重量
%であつた。また、比較のためシリコーンオイル
を塗布しないこと以外は全く同じ条件で製造した
成形体の水分吸収による重量増加は19重量%であ
つた。 次に凍割性についてASTM−C−666に準じて
測定した。水中凍結−水中融解(−18℃〜+5℃
のサイクルを1日2サイクル行なう)を行なつた
ところ、比較品は30サイクルで大きな「ひびわ
れ」が発生し表面に形成していたペースト層が爪
を押しただけで容易に傷つき欠け落ちたが、本発
明による製造品は外観はほとんど変化してなく、
爪で強く押しても傷つくことなく非常に硬い表面
であつた。 実施例 2 表−1のように、包通ポルトランドセメント
(普通ポセ)、硅石粉、シリコーン油類の量を変え
たこと以外は実施例1と同様に行つた。結果を表
−1に併記する。 なお、表−1の部は重量である。
The present invention relates to a method for producing lightweight cellular concrete molded bodies with excellent water resistance. Conventionally, lightweight cellular concrete molded bodies are manufactured by mixing raw material slurry mainly made of cement, lime, silica powder, etc. with metal powder, foaming agent, etc., adding air bubbles, and then curing with high temperature and high pressure steam. ing. The lightweight cellular concrete molded body produced in this manner has the advantages of being light, having heat insulating properties, and being easy to construct. On the other hand, it has drawbacks such as high water absorption, poor freeze resistance, brittleness due to its many pores, and weak strength of the paste layer formed on the surface and easy chipping. In order to solve these problems, methods have been proposed in which a water-repellent substance such as a paint is mixed into the raw material slurry or applied to the surface of a lightweight cellular concrete molded body. However, the method of mixing into the raw material slurry is not economical as it is impossible to strengthen the surface pores and the paste layer, and a large amount must be mixed in to obtain waterproof performance, and the mixed air bubbles may become unstable. The desired foam could not be obtained because the strength development deteriorated. Furthermore, the method of coating the surface of lightweight aerated concrete moldings results in scratches on the surface and deterioration when exposed outdoors, which impairs waterproof performance. The present invention aims to solve these problems, and after coating the surface of a molded body with silicone oil, it is cured with high temperature and high pressure steam in an autoclave, thereby making the molded body water resistant and having a surface. The present invention aims to provide a method for producing a lightweight cellular concrete molded body with excellent water resistance and significantly improved strength. That is, in the present invention, lightweight aerated concrete is molded, and silicone oil is applied to the surface of the molded product per 1 m2 .
This is a method for producing a lightweight cellular concrete molded body, which is characterized by applying 100 to 500 c.c. and then curing it with high temperature and high pressure steam. The present invention will be further explained in detail below. In the present invention, lightweight cellular concrete (hereinafter referred to as cellular concrete) is a raw material slurry made by mixing cement, lime, etc. with silica-based aggregate as necessary, and metal powder such as aluminum, a foaming agent, etc. However, it is manufactured by a general method of mixing air bubbles, and the method is not particularly limited. The foamed concrete manufactured by such a method is poured into a mold, solidified and hardened, and then cut with piano wire or the like as necessary to obtain a molded body. The silicone oils to be applied to the surface of the molded product include general silicone oils such as dimethylsiloxane oil, methylphenylsiloxane oil, methylhydrogensiloxane oil, methylsilicone varnish, phenylmethylsilicone varnish, or modified products thereof. may be used as long as it is liquid. As the application method, commonly used methods such as brush coating, spray coating, and dipping can be used. The amount of coating is sufficient as long as it can be applied to the entire surface, and usually about 100 to 500 c.c. per 1 m 2 is sufficient. Next, high-temperature, high-pressure steam curing (hereinafter referred to as autoclave curing) may be carried out under general conditions, and saturated steam at a pressure of 10 Kg/cm 2 and a temperature of 180° C. is usually used, but there are no particular restrictions. The cellular concrete manufactured by the present invention has extremely low water penetration, improved water resistance, excellent freeze resistance, and significantly improved surface strength, making it difficult to chip. This will be explained below using examples. Example 1 45 parts by weight of ordinary Portland cement and 55 parts by weight of silica powder were mixed with 60 parts by weight of water and stirred to produce a raw material slurry. A foaming agent (Formics C) is added to the raw material slurry.
・Hamano Kogyo) is mixed, air bubbles are mixed in, and the volume and weight are
A foam container of 0.7 g/cc was produced. This foam concrete was poured into a 10 x 10 x 40 cm mold, and after one day, the mold was removed to obtain a molded product. Apply silicone oil (Toray Silicone SH200) to the surface of the molded body at a rate of 200 per 1 m2.
After brushing the entire surface to cc, transfer to an autoclave, heat up to 40℃/hr, maximum pressure to 10Kg/cm 2 and temperature.
Autoclave curing was performed at 180°C for 8 hours.
Regarding this waterproof performance, the weight increase due to moisture absorption was measured after the molded body was immersed in water to a depth of 2 cm below the water surface and left for 24 hours, and was found to be 7% by weight. Furthermore, for comparison, a molded article manufactured under the same conditions except that no silicone oil was applied had a weight increase of 19% by weight due to moisture absorption. Next, freeze cracking properties were measured according to ASTM-C-666. Freezing in water - Thawing in water (-18°C to +5°C
(2 cycles a day), the comparison product developed large "cracks" after 30 cycles, and the paste layer that had formed on the surface was easily damaged and chipped off just by pressing the nail. , the product manufactured according to the present invention has almost no change in appearance;
The surface was very hard and did not get damaged even when I pressed it hard with my fingernail. Example 2 The same procedure as in Example 1 was carried out except that the amounts of Portland cement, silica powder, and silicone oil were changed as shown in Table 1. The results are also listed in Table-1. Note that the parts in Table 1 are weights.

【表】【table】

【表】 なお、実験No.2−7及び実験No.2−8はエ
チルシリケートを使用、それ以外は、シ
リコーンオイルを使用した。
[Table] Ethyl silicate was used in Experiment No. 2-7 and Experiment No. 2-8, and silicone oil was used in the other cases.

Claims (1)

【特許請求の範囲】[Claims] 1 軽量気泡コンクリートを成形し、該成形体表
面にシリコーン油類を、1m2当たり100〜500c.c.塗
布した後、高温高圧水蒸気養生することを特徴と
する軽量気泡コンクリートリート成形体の製造
法。
1. A method for producing a lightweight cellular concrete REIT molded body, which comprises molding lightweight cellular concrete, applying 100 to 500 c.c./m2 of silicone oil to the surface of the molded body, and then curing with high-temperature, high-pressure steam. .
JP97881A 1981-01-07 1981-01-07 Manufacture of lightweght foamed concrete Granted JPS57118084A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP97881A JPS57118084A (en) 1981-01-07 1981-01-07 Manufacture of lightweght foamed concrete

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP97881A JPS57118084A (en) 1981-01-07 1981-01-07 Manufacture of lightweght foamed concrete

Publications (2)

Publication Number Publication Date
JPS57118084A JPS57118084A (en) 1982-07-22
JPH0246548B2 true JPH0246548B2 (en) 1990-10-16

Family

ID=11488697

Family Applications (1)

Application Number Title Priority Date Filing Date
JP97881A Granted JPS57118084A (en) 1981-01-07 1981-01-07 Manufacture of lightweght foamed concrete

Country Status (1)

Country Link
JP (1) JPS57118084A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63277581A (en) * 1987-05-08 1988-11-15 Onoda:Kk Water-proofing treatment of light-weight aerated concrete
JP3917726B2 (en) * 1997-01-30 2007-05-23 大同コンクリート工業株式会社 Silicon impregnated porous sound absorbing material

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5838389B2 (en) * 1975-05-14 1983-08-23 タイヨウブツサン カブシキガイシヤ Mukitsutsuzokeibutsunokiyoudozoukiyouhouhou

Also Published As

Publication number Publication date
JPS57118084A (en) 1982-07-22

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