JPS63218529A - Rust inhibitor for iron for reinforcing lightweight foamed concrete - Google Patents
Rust inhibitor for iron for reinforcing lightweight foamed concreteInfo
- Publication number
- JPS63218529A JPS63218529A JP5016987A JP5016987A JPS63218529A JP S63218529 A JPS63218529 A JP S63218529A JP 5016987 A JP5016987 A JP 5016987A JP 5016987 A JP5016987 A JP 5016987A JP S63218529 A JPS63218529 A JP S63218529A
- Authority
- JP
- Japan
- Prior art keywords
- cement
- reinforcing
- weight
- gypsum
- rust
- 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
- 230000003014 reinforcing effect Effects 0.000 title claims description 26
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 title claims description 24
- 239000011381 foam concrete Substances 0.000 title claims description 9
- 239000003112 inhibitor Substances 0.000 title description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title 2
- 229910052742 iron Inorganic materials 0.000 title 1
- 239000004568 cement Substances 0.000 claims description 26
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 claims description 12
- 230000003449 preventive effect Effects 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000011398 Portland cement Substances 0.000 claims description 11
- 239000000839 emulsion Substances 0.000 claims description 7
- 239000004567 concrete Substances 0.000 claims description 6
- 239000004816 latex Substances 0.000 claims description 6
- 229920000126 latex Polymers 0.000 claims description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 229920003002 synthetic resin Polymers 0.000 claims description 3
- 239000000057 synthetic resin Substances 0.000 claims description 3
- 239000010440 gypsum Substances 0.000 description 10
- 229910052602 gypsum Inorganic materials 0.000 description 10
- 239000002002 slurry Substances 0.000 description 10
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 150000004684 trihydrates Chemical class 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000002265 prevention Effects 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 3
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 description 3
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000005018 casein Substances 0.000 description 2
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 2
- 235000021240 caseins Nutrition 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920006173 natural rubber latex Polymers 0.000 description 2
- 229920000896 Ethulose Polymers 0.000 description 1
- 239000001859 Ethyl hydroxyethyl cellulose Substances 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- -1 etc. Substances 0.000 description 1
- 235000019326 ethyl hydroxyethyl cellulose Nutrition 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Landscapes
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
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】
〔産業上の利用分野〕
本発明は軽量気泡コンクリート補強鉄筋用の防錆剤に関
するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rust preventive agent for reinforcing reinforcing bars of lightweight cellular concrete.
軽敏気泡コンクリートは珪酸質原料と石灰質原料と水を
混合したものに、アルミニウム等のｌ泡剤を加えてスラ
リー状としたものを、補強鉄筋を組み込んだ型枠に滴し
こみ発泡、半硬化させたのち、ピアノ線等で所望の形状
になるように切断し、これをオートクレーブ中で水蒸気
養生して！１造されている。Light cellular concrete is made by mixing silicic raw materials, calcareous raw materials, and water, adding a foaming agent such as aluminum to form a slurry, and pouring it into a formwork incorporating reinforcing bars to foam and semi-harden. After that, cut it into the desired shape using piano wire, etc., and cure it with steam in an autoclave! One has been built.
この補強鉄筋を素地の才Ｉ埋込んだのでは、軽量気泡コ
ンクリートが高い空隙率を有し、アルカリ性が弱いため
、空気中の湿気等により鉄筋は腐食され易いので、予め
鉄筋に防錆用被膜を形成することが行われている。If this reinforcing reinforcing bar is embedded in the base material, lightweight aerated concrete has a high porosity and is weakly alkaline, so the reinforcing bar is easily corroded by moisture in the air, so the reinforcing bar is coated with a rust-preventing coating in advance. is being formed.
この防錆剤としては、これまで大別して１）セメントを
主結合剤とするもの、２）アスファルトを東結合剤とす
るもの、３）樹脂又は樹脂エマルジタン、あるいはラテ
ックスを主結合剤とするもの、の３種類がある。These rust preventives have been roughly divided into 1) those that use cement as the main binder, 2) those that use asphalt as the main binder, and 3) those that use resin, resin emulgitan, or latex as the main binder. There are three types.
このうち１）のセメントを主成分として、これにラテッ
クスを添加したものとして特公昭３６−２３８７９号、
合成樹脂エマルジタンを添加したものとして特開昭４９
−９４７３１号、特開昭５１３−１０４０４９号、特開
昭５８−２１０９６８号等がある。Among these, 1) which has cement as its main component and latex added to it, is published in Japanese Patent Publication No. 36-23879.
Unexamined Japanese Patent Publication No. 1983 (1973) as a product containing synthetic resin emulgitane
-94731, JP-A-513-104049, JP-A-58-210968, etc.
このセメントを主結合剤としたセメント系Ｕｉ １４剤
はコストが安く、軽量気泡コンクリート基材との付着力
が大きく、防錆性能も一応渭足するので最も一般的に使
用されているが、防錆剤の使用可能日数が短いと云う大
きな欠点があった。Cement-based Ui 14 agent, which uses this cement as the main binder, is the most commonly used because it is cheap, has strong adhesion to lightweight aerated concrete base material, and has moderate rust prevention performance. A major drawback was that the rust agent could only be used for a short period of time.
本発明の目的は上記の欠点のない軽量気泡コンクリート
補強鉄筋用防錆剤を提供することにある（ＩＩ、１１１
点を解決するための手段〕この目的を達成するため、発
明者等は種々検討の結果、セメント系防錆剤に使用する
セメントとして、ポルトランドセメント中に半水石膏を
０．１〜３重ｆ１％ （ＳＯ３ＩＩ換算）含有した凝結
連延性セメントを用いると、使用可能日数が従来に比し
て格段に延長できることを見出して本発明に到達した。The object of the present invention is to provide a rust preventive agent for reinforcing reinforcing bars in lightweight aerated concrete without the above-mentioned drawbacks (II, 111
[Means for solving the problem] In order to achieve this objective, the inventors conducted various studies and found that 0.1 to 3 times f1 of gypsum hemihydrate was added to Portland cement as a cement to be used as a cement-based rust preventive agent. % (calculated as SO3II), the present invention was achieved by discovering that the number of usable days can be significantly extended compared to conventional cements.
すなわち本発明はセメントを主成分とし、これに合成樹
脂エマルシヨン、ラテックス等と水を混合したスラリー
状混合物からなるセメント系軽量気泡コンクリート補強
鉄筋用防錆剤において、該セメントをポルトランドセメ
ント中に半水石膏を０ 、１〜３ ＠Ｅｋ ％ （ＳＯ
３量換算）含有ＬりＭ結遅ｆｆｉ性セメントとしたもの
である。That is, the present invention relates to a rust preventive agent for reinforcing reinforcing bars in cement-based lightweight cellular concrete, which is composed of a slurry-like mixture of cement as a main component, mixed with synthetic resin emulsion, latex, etc., and water. Plaster at 0, 1~3 @Ek% (SO
It is a retarded ffi cement containing L and M (calculated in terms of 3 amounts).
本発明に使用するポルトランドセメントの半水石−ｆｆ
（ＳＯ３量換算）の含有量が０．１重量％以下では使用
可能日数延長の効果が不十分であり、３重量％を超える
とプリージング現象を起こし被膜強、 度が弱くなる。Portland cement hemihydrate used in the present invention-ff
If the content (in terms of SO3 amount) is less than 0.1% by weight, the effect of extending the usable days will be insufficient, and if it exceeds 3% by weight, a pleading phenomenon will occur and the strength and strength of the coating will be weakened.
凝結遅延性セメント以外の防錆剤の構成成分は従来使用
されているものなら、いずれも使用可能日数の延長が可
能である。If the components of the rust preventive agent other than the setting-retarded cement are conventionally used, it is possible to extend the usable period.
これらの成分の中で、特公昭３Ｂ−２３８１８号に記載
のラテックスを使用したもの、特開昭４９−９４７３１
号に記載のセメントに対して樹脂分が１〜５６膚量％の
エチレン−酢酸ビニール共重合樹脂エマルジｑンを用い
たもの、特開昭５８−１８４０４９号に記載の前記エチ
レン−酢酸ビニール共重合樹脂エマルジ１ン等にヒドロ
キシエチルセルロース又はエチルヒＦロキシエチルセル
ロースを混合したもの、この他添加する樹脂としてはス
チレン系４１１ｓのエマルシヨン等を使用したものが推
奨できる。Among these ingredients, those using the latex described in Japanese Patent Publication No. 3B-23818, and those using the latex described in Japanese Patent Publication No. 49-94731.
Those using an ethylene-vinyl acetate copolymer resin emulsion having a resin content of 1 to 56% based on the cement described in No. It is recommended to use a resin emulsion mixed with hydroxyethylcellulose or ethylhydroxyethylcellulose, and as the resin to be added, a styrene-based 411s emulsion or the like is recommended.
従来のポルトランドセメントは三水石膏を８０３量換算
で３．０％以下含有させることによって凝結連延の調節
を行っている。セメントに水を加えて混練するりに、水
に対して溶解度の小さい三水石膏では注水直後は反応が
遅いが、混線が終わった５〜ｌＯ分後も徐々に水和物が
生成し急結する。Conventional Portland cement adjusts setting and spreading by containing trihydrate gypsum in an amount of 3.0% or less in terms of 803%. When adding water to cement and kneading it, gypsum trihydrate, which has a low solubility in water, reacts slowly immediately after adding water, but hydrates gradually form even after 5 to 10 minutes after mixing has ended, causing rapid solidification. do.
しかし本発明に使用するポルトランドセメントは、石膏
を半水石膏として含有しており、半水石膏は三水石膏に
比して遥かに水に対する溶解度が高いため、注水後の数
分の間に水和物が生成して線膜され、流動性の良い状態
が保たれ、その後カルシウムクリケートの水和がｊ！！
延されることになり、従って該セメントを主成分とする
防錆剤スラリーの使用可能日数は格段に延長させること
ができる。モこで本発明に使用するセメントは三水石膏
を含有しないことが望ましい。However, the Portland cement used in the present invention contains gypsum in the form of gypsum hemihydrate, and gypsum hemihydrate has a much higher solubility in water than gypsum trihydrate. hydrate is formed and formed into a linear film, maintaining good fluidity, and then the hydration of calcium silicate is j! !
Therefore, the usable number of days of the rust preventive slurry containing the cement as a main component can be significantly extended. It is desirable that the cement used in the present invention does not contain trihydrate.
半水石膏を含有するセメントを得るには半水石膏を通常
のセメントタリンカーと混合粉砕しても良いし、それぞ
れ別に粉砕して混合しても良い。To obtain cement containing gypsum hemihydrate, gypsum hemihydrate may be mixed and pulverized with ordinary cement talinker, or each may be separately pulverized and mixed.
又三水石膏を用いて且つ粉砕温度を１５０ ”Ｃ以上の
三水石膏の脱水温度以上として脱水して半水石膏を含有
したセメントを得ても良い。Alternatively, a cement containing gypsum hemihydrate may be obtained by using gypsum trihydrate and dehydrating it at a grinding temperature of 150''C or higher, which is the dehydration temperature of gypsum trihydrate.
この発明による防錆剤に鉄筋を浸漬するが、あるいは、
は（す塗りした後乾燥し、鉄筋の表面に適当な厚さの被
膜を形成させる。被膜形成のための乾燥は外力による崩
壊を防ぐため常温乃至８０ ”Ｃ位の＃Ｉ風により行い
、被膜を硬化させ、鉄筋へ固着させる。そして被膜を形
成した鉄筋を軽量気泡コンクリート成形用の型枠内にセ
、トシ、軽量気泡コンクリート製造用原料を調合したス
ラリーを注入し、発泡、硬化、成形を行う。その後、こ
れをオートクレーブ中にて４〜１２ｂ／ｃｍ”の高温高
圧水蒸気養生を施して補強鉄筋を埋設した軽量気泡コン
クリートを得る。Immersing the reinforcing steel in the rust inhibitor according to the invention, or
After coating, dry to form a film of appropriate thickness on the surface of the reinforcing bars.Drying for film formation is done with #I air at room temperature to about 80"C to prevent collapse due to external force. Then, the coated reinforcing bars are placed in a mold for forming lightweight cellular concrete, and a slurry containing raw materials for manufacturing lightweight cellular concrete is injected into the mold to foam, harden, and form. Thereafter, this is subjected to high-temperature and high-pressure steam curing at 4 to 12 b/cm'' in an autoclave to obtain lightweight cellular concrete in which reinforcing reinforcing bars are embedded.
以下この発明の実施例について説明する。 Examples of the present invention will be described below.
実施例１
普通ポルトランドセメン）（ＳＯａ量
換算で半水石膏２重量％含有） １００重量部エ
チレン−酢酸ビニル共ｍ合エマル
ジ目ン（樹脂分５５石量％、スミカフ
レックス５１０；住友化学工業製） ５重量部ヒ
ドロキシエチルセルロース ｏ、＋ｆｆｉ量部水
３５ 重量部上記物質のうちヒドロキシエチルセルロー
スは少量の水に溶解させた後、これにエチレン−酢酸ビ
ニル共重合エマルジジンとセメントと水を加えて′混合
し、粘稠なスラリー状の被膜形成剤を作成した。このス
ラリーは鉄筋表面に良好な被膜を形成させるための保存
期間、すなわち使用可能時間は長く、常温で１６〜１９
日間使用可能であった。Example 1 Ordinary Portland cement) (contains 2% by weight of gypsum hemihydrate in terms of SOa content) 100 parts by weight Ethylene-vinyl acetate co-polymerized emulsion (resin content 55% by weight, Sumikaflex 510; manufactured by Sumitomo Chemical Industries) 5 parts by weight hydroxyethylcellulose o, +ffi parts by weight water
35 parts by weight Among the above substances, hydroxyethyl cellulose is dissolved in a small amount of water, and then ethylene-vinyl acetate copolymer emulzidine, cement, and water are added and mixed to create a viscous slurry film-forming agent. did. This slurry has a long storage period to form a good film on the reinforcing steel surface, that is, it can be used for a long time.
It was usable for days.
このスラリーに鉄筋を浸清し、引上げて乾燥させ鉄筋表
面に被膜を形成させて、これを型枠内に配置してスラリ
ー状の軽量気泡コンクリート原料配合物を流し込み、発
泡成形させた後、オートクレーブ内で１８５℃、 １１
．５／ｂ／ｃｍ”の水蒸気養生を１０時間行ったものに
ついて耐候性試験を行った結果、防錆性能は極めて良好
であり、またコンクリート内に埋め込まれた鉄筋の錆の
発生を観察した結果、殆と錆が出現していなかった。Reinforcing bars are soaked in this slurry, pulled up and dried to form a film on the surface of the reinforcing bars, placed in a formwork, poured with a slurry-like lightweight cellular concrete raw material mixture, foam-molded, and then placed in an autoclave. 185℃ within 11
．． 5/b/cm" steam curing for 10 hours, the results showed that the rust prevention performance was extremely good. Also, as a result of observing the occurrence of rust on the reinforcing bars embedded in the concrete, Almost no rust appeared.
比較例１
実施例１においてＳＯ３量換算で半水石膏２重量％含有
した普通ポルトランドセメントの代わりに５０３量換算
で工水石膏２重量％含有した普通ポルトランドセメント
を使用して防錆剤を調整した。Comparative Example 1 In place of the ordinary Portland cement containing 2% by weight of gypsum hemihydrate in terms of SO3 amount in Example 1, a rust preventive was prepared by using ordinary Portland cement containing 2% by weight of industrial gypsum in terms of 503 amount. .
この混合物はやや粘度が高く、防錆剤としての使用可能
日数は２〜３日と短かった。This mixture had a rather high viscosity and could only be used as a rust preventive for a short period of 2 to 3 days.
実施例２
普通ポルトランドセメント（５０３量
換算で半水石膏２重量％含有）１００重量部天然ゴムラ
テックスエマルジｄン
（固形分６０％） ８重量部粉末
カゼイン（９０メツシュ程度） ３重量部水
３５
重量部上記物質のうちカゼインは少量のアルカリ液に
溶解させた後、天然ゴムラテツクスとセメントと水を加
えて混合し、粘稠なスラリー状の鉄筋防錆被膜形成剤を
作成した。このスラリーは鉄筋表面に均質な被膜を形成
させるための使用可能日数及び防錆性能共に実施例１と
ほぼ同等であた。Example 2 Ordinary Portland cement (contains 2% by weight of gypsum hemihydrate calculated as 503) 100 parts by weight Natural rubber latex emulsion (solid content 60%) 8 parts by weight Powdered casein (approximately 90 mesh) 3 parts by weight Water
35
Parts by Weight Among the above substances, casein was dissolved in a small amount of alkaline solution, and then natural rubber latex, cement, and water were added and mixed to prepare a viscous slurry-like reinforcing steel rust preventive film forming agent. This slurry was almost equivalent to Example 1 in terms of the number of days it could be used to form a homogeneous coating on the surface of the reinforcing bars and its antirust performance.
実施例３
汗通ポルトランドセメント中の石膏を半水石膏としてＳ
Ｏ３換算重量％で夫々０．１，１ 、２．３．３．５含
有するセメントを使用し、その他は実施例１と同様の調
合で粘稠なスラリー状被膜形成剤を作成し、鉄筋防錆被
膜形成剤としての使用可能日数を調べた結果を第１表に
示す。Example 3 S
A viscous slurry film-forming agent was prepared using cement containing 0.1, 1 and 2.3.3.5% by weight in terms of O3, and the other ingredients were the same as in Example 1. Table 1 shows the results of investigating the number of days it can be used as a rust film forming agent.
この結果から半水石膏のＳ０３換Ｗｆｆｆ量で０．１％
のもので３〜４日あり、１％及び２％でも比較例２の３
倍以上、３％では２０〜２３日と比較例１の約４倍と長
く防錆性能は良好であった。３．５％ではスラリーの固
液分離が見られ良好な鉄筋防錆被膜形成剤とは云えない
ものであった。From this result, the S03 conversion Wfff amount of gypsum hemihydrate is 0.1%.
It takes 3 to 4 days for 1% and 2%.
At 3% or more, the rust prevention performance was good for 20 to 23 days, about 4 times as long as in Comparative Example 1. At 3.5%, solid-liquid separation of the slurry was observed, and it could not be said to be a good antirust film forming agent for reinforcing bars.
比較例２
実施例３の普通ポルトランドセメント中の石膏を工水石
膏とした以外は実施例３と全く同様にして試験を行った
。結果を第１表に併記する。Comparative Example 2 A test was conducted in exactly the same manner as in Example 3, except that the gypsum in the ordinary Portland cement in Example 3 was replaced with industrial gypsum. The results are also listed in Table 1.
工水石膏のＳ０３換算重量で０．１％のものはスラリー
とならず、３％で使用可能日数は７〜８日と短く、３．
５％でも使用可能日数は７〜８日で被膜もやや粗（防錆
性能も少し劣るものであった。3. S03 equivalent weight of 0.1% industrial water gypsum does not become slurry, and 3% can be used for only 7 to 8 days.
Even at 5%, the usable period was 7 to 8 days, and the coating was somewhat rough (rust prevention performance was also slightly inferior).
第 １ 表
〔効果〕
以上詳細に説明したように、ポルトランドセメントとし
て半水石膏を０．１〜３重量％含有した凝結遅延性セメ
ントを主成分とする本発明の軽量気泡コンクリート補強
鉄筋用防錆剤は、その使用可能日数が長く防錆性能にお
いても優れており、大川的価値は大なるものがある。Table 1 [Effects] As explained in detail above, the anti-rust effect for reinforcing reinforcing bars in lightweight aerated concrete of the present invention is based on a retarded setting cement containing 0.1 to 3% by weight of gypsum hemihydrate as Portland cement. The agent has a long shelf life and excellent anti-rust performance, and is therefore of great value to Okawa.
Claims (1)
ラテックス等と水を混合したスラリー状混合物からなる
セメント系軽量気泡コンクリート補強鉄筋用防錆剤にお
いて、該セメントはポルトランドセメント中に半水石膏
を０．１〜３重量％（ＳＯ＿３量換算）含有した凝結遅
延性セメントであることを特徴とする軽量気泡コンクリ
ート補強鉄筋用防錆剤。The main component is cement, and a synthetic resin emulsion,
In a cement-based lightweight cellular concrete reinforcing reinforcing steel rust preventive agent made of a slurry-like mixture of latex, etc. and water, the cement contains 0.1 to 3% by weight (in terms of SO_3 amount) of gypsum hemihydrate in Portland cement. A rust preventive agent for reinforcing reinforcing bars in lightweight aerated concrete, which is characterized by being a setting-retarding cement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5016987A JPS63218529A (en) | 1987-03-06 | 1987-03-06 | Rust inhibitor for iron for reinforcing lightweight foamed concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5016987A JPS63218529A (en) | 1987-03-06 | 1987-03-06 | Rust inhibitor for iron for reinforcing lightweight foamed concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63218529A true JPS63218529A (en) | 1988-09-12 |
Family
ID=12851699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5016987A Pending JPS63218529A (en) | 1987-03-06 | 1987-03-06 | Rust inhibitor for iron for reinforcing lightweight foamed concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63218529A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107954665A (en) * | 2017-12-26 | 2018-04-24 | 陕西凝远新材料科技股份有限公司 | A kind of light-weighted autoclaved special healant of sand aerated concrete plate and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4994731A (en) * | 1972-11-20 | 1974-09-09 | ||
| JPS56164049A (en) * | 1980-05-21 | 1981-12-16 | Sumitomo Metal Mining Co | Rust preventive coat forming agent for lightweight foamed concrete reinforcing iron bar |
| JPS57140344A (en) * | 1980-10-11 | 1982-08-30 | Steinmueller Gmbh L & C | Additive for fly ash cement |
-
1987
- 1987-03-06 JP JP5016987A patent/JPS63218529A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4994731A (en) * | 1972-11-20 | 1974-09-09 | ||
| JPS56164049A (en) * | 1980-05-21 | 1981-12-16 | Sumitomo Metal Mining Co | Rust preventive coat forming agent for lightweight foamed concrete reinforcing iron bar |
| JPS57140344A (en) * | 1980-10-11 | 1982-08-30 | Steinmueller Gmbh L & C | Additive for fly ash cement |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107954665A (en) * | 2017-12-26 | 2018-04-24 | 陕西凝远新材料科技股份有限公司 | A kind of light-weighted autoclaved special healant of sand aerated concrete plate and preparation method thereof |
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