JPH013039A - Admixture for concrete - Google Patents
Admixture for concreteInfo
- Publication number
- JPH013039A JPH013039A JP62-158737A JP15873787A JPH013039A JP H013039 A JPH013039 A JP H013039A JP 15873787 A JP15873787 A JP 15873787A JP H013039 A JPH013039 A JP H013039A
- Authority
- JP
- Japan
- Prior art keywords
- calcium
- admixture
- concrete
- thiocyanate
- amidosulfonate
- 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.)
- Granted
Links
- 239000004567 concrete Substances 0.000 title claims description 18
- ALWXETURCOIGIZ-UHFFFAOYSA-N 1-nitropropylbenzene Chemical compound CCC([N+]([O-])=O)C1=CC=CC=C1 ALWXETURCOIGIZ-UHFFFAOYSA-N 0.000 claims description 20
- RAFRTSDUWORDLA-UHFFFAOYSA-N phenyl 3-chloropropanoate Chemical compound ClCCC(=O)OC1=CC=CC=C1 RAFRTSDUWORDLA-UHFFFAOYSA-N 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 6
- 150000001414 amino alcohols Chemical class 0.000 claims description 5
- 239000011575 calcium Substances 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims 1
- YZVJHCGMTYDKFR-UHFFFAOYSA-L magnesium;disulfamate Chemical compound [Mg+2].NS([O-])(=O)=O.NS([O-])(=O)=O YZVJHCGMTYDKFR-UHFFFAOYSA-L 0.000 claims 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 6
- 239000001110 calcium chloride Substances 0.000 description 6
- 229910001628 calcium chloride Inorganic materials 0.000 description 6
- 239000004568 cement Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 5
- 238000000354 decomposition reaction Methods 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- ZMZDMBWJUHKJPS-UHFFFAOYSA-N hydrogen thiocyanate Natural products SC#N ZMZDMBWJUHKJPS-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- ZMZDMBWJUHKJPS-UHFFFAOYSA-M Thiocyanate anion Chemical compound [S-]C#N ZMZDMBWJUHKJPS-UHFFFAOYSA-M 0.000 description 2
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- RPAJSBKBKSSMLJ-DFWYDOINSA-N (2s)-2-aminopentanedioic acid;hydrochloride Chemical class Cl.OC(=O)[C@@H](N)CCC(O)=O RPAJSBKBKSSMLJ-DFWYDOINSA-N 0.000 description 1
- BFSVOASYOCHEOV-UHFFFAOYSA-N 2-diethylaminoethanol Chemical compound CCN(CC)CCO BFSVOASYOCHEOV-UHFFFAOYSA-N 0.000 description 1
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 description 1
- OPKOKAMJFNKNAS-UHFFFAOYSA-N N-methylethanolamine Chemical compound CNCCO OPKOKAMJFNKNAS-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- -1 alkali metal salts Chemical class 0.000 description 1
- LHIJANUOQQMGNT-UHFFFAOYSA-N aminoethylethanolamine Chemical compound NCCNCCO LHIJANUOQQMGNT-UHFFFAOYSA-N 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 238000005571 anion exchange chromatography Methods 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 159000000007 calcium salts Chemical group 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- CRVGTESFCCXCTH-UHFFFAOYSA-N methyl diethanolamine Chemical compound OCCN(C)CCO CRVGTESFCCXCTH-UHFFFAOYSA-N 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 150000003567 thiocyanates Chemical class 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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】 瓜栗上■■且分立 本発明は、コンクリート混和剤に関する。[Detailed description of the invention] Urikuri upper ■■ and separation The present invention relates to concrete admixtures.
本発明の混和剤は、コンクリートの硬化促進剤として用
いられる他、コンクリートの防諜剤、凝結促進剤として
、或は更に、従来の減水剤、ＡＥ減水剤、ＡＥ剤などと
配合することにより塩化物を含まない促進形ＡＥＪ水剤
としても用いられる。The admixture of the present invention can be used as a hardening accelerator for concrete, as well as an anti-infiltration agent and a setting accelerator for concrete, or can be used to reduce chloride by blending with conventional water reducers, AE water reducers, AE agents, etc. It is also used as an accelerated AEJ solution that does not contain.
災米皇技術
］ンクリート用硬化促進剤として、塩化カルシウムが性
能優秀で、かつ安価であるので、従来、最も広く用いら
れて来たが、コンクリートの耐久性の観点より、１９８
７年より塩化物の総量規制が強化されたので、鉄筋コン
クリートには実質上塩化カルシウムは使用できなくなっ
た。Calcium chloride has traditionally been the most widely used curing accelerator for concrete due to its excellent performance and low cost, but from the viewpoint of concrete durability, 198
Regulations on the total amount of chloride were tightened in 1979, making it virtually impossible to use calcium chloride in reinforced concrete.
塩化カルシウムに代わるべき有効な非塩化物系硬化促進
剤としてチオシア・ン酸塩が優れていることは、たとえ
ばドイツ特許第５７８７１６号明細書に記載されている
。特に、チオシアン酸塩は、セメントに対し０．２重量
％以下の低添加率で優れた硬化促進能を示し、塩化カル
シウムとは著しく異なる。The superiority of thiocyanate as an effective non-chloride hardening accelerator to replace calcium chloride is described, for example, in German Patent No. 578,716. In particular, thiocyanate exhibits an excellent ability to accelerate hardening at a low addition rate of 0.2% by weight or less to cement, and is significantly different from calcium chloride.
チオシアン酸塩の中でもナトリウム塩などのアルカリ金
属塩は、コンクリートのアルカリ量を増加させ、アルカ
リ骨材反応を引き起こす恐れがあるが、カルシウム塩は
、セメント化合物と安定な複塩を形成するのでかかる恐
れが全くなく、最も好ましいことが知られている。Among the thiocyanates, alkali metal salts such as sodium salts increase the alkali content of concrete and may cause alkaline aggregate reactions, but calcium salts form stable double salts with cement compounds and may cause this risk. It is known that it is the most preferable because it has no at all.
チオ、シアン酸カルシウムは、鉄筋を腐食させることが
知られているが、セメントに対して０．２重量％以下の
使用量であるならば、コンクリート中の鉄筋には事実上
発錆が起らない。しかしながら、チオシアン酸カルシウ
ムをたとえセメントに対し０．２重量％以下使用しても
鉄筋コンクリートの長期間での耐久性には尚問題がある
。Calcium thio-cyanate is known to corrode reinforcing steel, but if it is used in an amount of 0.2% by weight or less based on cement, there will be virtually no rusting on reinforcing steel in concrete. do not have. However, even if calcium thiocyanate is used in an amount of 0.2% by weight or less based on cement, there are still problems with the long-term durability of reinforced concrete.
一方、亜硝酸カルシウムは、チオシアン酸カルシウムの
鉄筋に対する腐食性を効果的に防止することが、特開昭
６１−１４１６４９号公報に記載されている。同公報に
よると、チオシアン酸カルシウムと亜硝酸カルシウムと
の特定比率の混合物は、アルカリ性を示し長期間安定で
あり、腐食性は全くないので、その製造設備や輸送容器
は、通常、鉄製でよく、鉄筋コンクリートの耐久性にも
優れ、また塩化カルシウムに匹敵する硬化促進能をもつ
優れた硬化促進剤であると説明されている。On the other hand, JP-A-61-141649 describes that calcium nitrite effectively prevents the corrosivity of calcium thiocyanate to reinforcing steel. According to the publication, a mixture of calcium thiocyanate and calcium nitrite in a specific ratio exhibits alkalinity, is stable for a long period of time, and is not corrosive at all, so its production equipment and transportation containers can usually be made of iron. It is said to be an excellent hardening accelerator that has excellent durability for reinforced concrete and has a hardening accelerating ability comparable to that of calcium chloride.
入■が′シようとする。跣点
しかしながら、チオシアン酸カルシウムと亜硝酸カルシ
ウムとの混合物に、強酸が混入されると、亜硝酸カルシ
ウムは強酸により分解され窒素酸化物が生成し、これが
強酸化剤としてチオシアン酸カルシウムを分解してシア
ンガスの発生をもたらすという問題がある。Enter■ tries to enter. However, when a strong acid is mixed into a mixture of calcium thiocyanate and calcium nitrite, the calcium nitrite is decomposed by the strong acid and nitrogen oxides are generated, which act as strong oxidants and decompose the calcium thiocyanate. There is a problem in that it results in the generation of cyan gas.
１月 冑を角”ンするための ｒ
本発明のコンクリート用混和剤は、チオシアン酸カルシ
ウム及び亜硝酸カルシウムを含有するコンクリート用混
和剤又はチオシアン酸カルシウムと亜硝酸カルシウムと
アミノアルコールを含有するコンクリート用混和剤に、
更にアミドスルホン酸塩を含有させたことを特徴とする
。The concrete admixture of the present invention is a concrete admixture containing calcium thiocyanate and calcium nitrite, or a concrete admixture containing calcium thiocyanate, calcium nitrite, and amino alcohol. In the admixture,
It is further characterized in that it contains an amidosulfonate.
亜硝酸カルジムは、チオシアン酸カルシウム１モルに対
し０．８モル以上、好ましくは１．０モル以上、アミド
スルフォン酸塩は、亜硝酸カルシウム１モルに対し１．
０モル以上、好ましくは１．２モル以上の各比率に含有
させるのがよい。アミノアルコールは、通常水溶性のも
のが用いられ、その含有率は低くてよい。用いられる水
溶性アミノアルコールの例としては、トリエタノールア
ミン、Ｎ、Ｎ−デイメチルエタノールアミン、Ｎ、 Ｎ
−デイエチルエタノールアミン、Ｎ−（β−アミノエチ
ル）エタノールアミン、Ｎ−メチルエタノールアミン、
Ｎ−メチルデイエタノールアミンおよびそれらの混合物
が挙げられ、好ましくは、トリエタノールアミンである
。The amount of cardim nitrite is 0.8 mol or more, preferably 1.0 mol or more, per 1 mol of calcium thiocyanate, and the amount of amidosulfonate is 1.0 mol or more per 1 mol of calcium nitrite.
It is preferable to contain each in a ratio of 0 mol or more, preferably 1.2 mol or more. A water-soluble amino alcohol is usually used, and its content may be low. Examples of water-soluble amino alcohols used include triethanolamine, N,N-dimethylethanolamine, N,N
-diethylethanolamine, N-(β-aminoethyl)ethanolamine, N-methylethanolamine,
Mention may be made of N-methyldiethanolamine and mixtures thereof, preferably triethanolamine.
本発明の混和剤は、他の公知の混和剤を更に含有するこ
ともできる。The admixture of the present invention may further contain other known admixtures.
本発明の混和剤は、コンクリートの配合時にコンクリー
トに添加さ、れるが、その添加量としては、チオシアン
酸カルシウムは、セメントに対して０．２重量％以下の
使用量となるように、また、アミノアルコールは、セメ
ントに対し０．００１〜０，０６重量％となる量がよい
。The admixture of the present invention is added to concrete at the time of mixing concrete, and the amount of calcium thiocyanate added is 0.2% by weight or less based on cement; The amino alcohol is preferably used in an amount of 0.001 to 0.06% by weight based on the cement.
作−朋
本発明の多成分からなる混和剤に強酸が混入された時、
亜硝酸カルシウムとアミドスルフォン酸塩とは、下式に
より定量的に反応して、Ｎ２ガスを発生し、窒素酸化物
は生成しないのでチオシアン酸カルシウムの分解もほと
んど起こらない。従ってシアンガスの発生も起らない。When a strong acid is mixed into the multi-component admixture of the present invention,
Calcium nitrite and amidosulfonate react quantitatively according to the following formula to generate N2 gas and no nitrogen oxides are generated, so that decomposition of calcium thiocyanate hardly occurs. Therefore, no cyan gas is generated.
Ｃａ （ＮＯｘ） ｚ 十Ｍ （ＳＯＪｌｌｚ） ｚ−
ＣａＳ０４・２Ｈ２０↓＋ＭＳＯ，↓＋２１１２↑ここ
でＭは、ＭｇまたはＣａをしめす。Ca (NOx) z 10M (SOJllz) z-
CaS04・2H20↓+MSO,↓+2112↑Here, M represents Mg or Ca.
実用±
表１に示した組成の混和剤８点を調製し、下記テストＡ
、Ｂ及びＣをおこなった。Practical ± Eight admixtures with the compositions shown in Table 1 were prepared and tested in the following test A.
, B and C were performed.
なお、混和剤Ｎ０．３，４，５．６．７および８に含ま
れるアミドスルフォン酸塩の亜硝酸カルシウムに対する
モル比は、それぞれ１．０４，１．２２゜１．４６．
１．５３． １．２１および１．４２である。また、混
和剤Ｎα２〜５およびＮα６〜８に含まれる亜硝酸カル
シウムのチオシアン酸カルシウムに対するモル比は、そ
れぞれ、１．１８および０．９５である。In addition, the molar ratio of amidosulfonate to calcium nitrite contained in admixtures No. 3, 4, 5, 6.7 and 8 is 1.04, 1.22° and 1.46°, respectively.
1.53. 1.21 and 1.42. Furthermore, the molar ratios of calcium nitrite to calcium thiocyanate contained in admixtures Nα2-5 and Nα6-8 are 1.18 and 0.95, respectively.
テストＡ
サンプル１．０ｇに水を加えて１０．０ ｇとしく１＋
１）ＩＩＩＪを１０ｆｆｌｌ添加し、発生したガスを０
．１規定Ｎａ０８３００ｍｌに入った吸収瓶に１０分間
、吸引した。吸収液を適宜希釈し、電気化学検出器を具
備したアニオン・クロマトグラフィにてシアンの定量分
析を行なった。Test A Add water to 1.0 g of sample to make 10.0 g and 1+
1) Add 10ffll of IIIJ and reduce the generated gas to 0.
．． Suction was applied to an absorption bottle containing 300 ml of 1N Na08 for 10 minutes. The absorption liquid was diluted appropriately, and cyan was quantitatively analyzed using anion chromatography equipped with an electrochemical detector.
発生したシアンの化学当量をサンプル中に含まれていた
チオシアン酸の化学当７で割って１００を掛けてチオシ
アン酸カルシウム分解率として表１に示した。The chemical equivalent of the generated cyanide was divided by the chemical equivalent of thiocyanic acid contained in the sample by 7 and multiplied by 100, which is shown in Table 1 as the calcium thiocyanate decomposition rate.
亜硝酸カルシウムを含まないチオシアン酸カルシウム（
混和剤Ｎα１）は、はとんど分解しないが、亜硝酸カル
シウムを含みアミドスルフォン酸塩を含まないサンプル
（混和剤Ｎα２）では、チオシアン酸カルシウムの分解
が著しい。これに対しアミドスルフォン酸塩を含んだ各
サンプルのチオシアン酸カルシウム分解率は著しく小さ
い。アミドスルフォン酸塩の効果は明瞭であり、アミド
スルフォン酸塩の量比によっては、混和剤Ｎｏ、 １と
同等レベルのチオシアン酸カルシウム分解率に下げるこ
ともできることがわかる。Calcium thiocyanate without calcium nitrite (
The admixture Nα1) hardly decomposes, but in the sample containing calcium nitrite and no amidosulfonate (admixture Nα2), the decomposition of calcium thiocyanate is significant. In contrast, the calcium thiocyanate decomposition rate of each sample containing amidosulfonate was significantly lower. The effect of the amidosulfonate is clear, and it can be seen that the decomposition rate of calcium thiocyanate can be lowered to the same level as that of admixture No. 1 depending on the amount ratio of the amidosulfonate.
テストＢ
テスｌ−Ａで用いた同じサンプルを用い、普通ポルトラ
ンドセメントに対して各サンプルを１重量％添加しその
硬化促進能としてＪＩＳ Ｒ５２０１に準しモルタル圧
縮強度を測定した。結果はまとめて表１に示す。アミド
スルフォン酸塩を添加した混和剤ト；ｏ３〜８は、いず
れも、混和剤Ｎｏ、 ２と同等もしくはそれ以上の硬化
促進能を有することを示している。Test B Using the same samples used in Test I-A, each sample was added in an amount of 1% by weight to ordinary Portland cement, and the mortar compressive strength was measured in accordance with JIS R5201 to determine its ability to accelerate hardening. The results are summarized in Table 1. All of the admixtures No. 3 to 8 to which the amidosulfonate was added have a curing accelerating ability equal to or greater than that of admixtures No. 2 and 2.
テストＣ
テストＡおよびＢで用いた同じ組成のサンプルに水酸化
カルシウムを飽和させて試験液とし、ＪＩＳ Ａ６２０
５の付属書１試験方法５に卓じて自然電極電位の経時変
化を測定したところ、混和剤Ｎｏ、 １は鉄筋に発錆が
みられその自然電極電位は卑の方向を示し、その他の混
和剤の自然電極電位は、全て貴の方向を示し鉄筋に対し
て発錆を認めなかった。その結果の判定を表１にまとめ
て示す。○印は無発錆を、Ｘ印は発錆を表わす。Test C A sample with the same composition used in Tests A and B was saturated with calcium hydroxide to prepare a test liquid, and JIS A620
When the change in natural electrode potential over time was measured in accordance with Test Method 5 in Appendix 1 of 5, admixture No. 1 showed rusting on the reinforcing steel, and its natural electrode potential showed a more base direction. The natural electrode potential of the agent all showed a noble direction, and no rust was observed on the reinforcing steel. The results are summarized in Table 1. The mark ○ indicates no rust, and the mark X indicates rust.
以下余白
光１υ亮果
本発明の混和剤は、特にコンクリート用硬化促進剤とし
て有用であり、万が−、誤って強酸が混入されても、有
毒な窒素酸化物ガス、シアンガスを実質的に発生しない
。しかも本発明の混和剤は、塩化カルシウムに匹敵する
硬化促進性を示し、かつ塩化物を含まず、非アルカリで
あるので、耐久性に優れた良質なコンクリートを得るこ
とができ、また他の混和剤と併用することもできるので
、本発明の工業的有用性は大である。The admixture of the present invention is particularly useful as a hardening accelerator for concrete, and even if a strong acid is accidentally mixed in, it will substantially generate toxic nitrogen oxide gas and cyan gas. do not. In addition, the admixture of the present invention exhibits hardening accelerating properties comparable to calcium chloride, does not contain chlorides, and is non-alkaline, making it possible to obtain high-quality concrete with excellent durability. Since the present invention can be used in combination with other agents, the industrial utility of the present invention is great.
特許出願人 日産化学工業株式会社Patent applicant: Nissan Chemical Industries, Ltd.
Claims (5)
含有するコンクリート用混和剤にアミドスルフォン酸塩
を含有させたコンクリート用混和剤。(1) A concrete admixture containing an amidosulfonate in a concrete admixture containing calcium thiocyanate and calcium nitrite.
ネシウムのアミドスルホン酸塩またはそれらの混合物で
ある特許請求の範囲第（１）項記載の混和剤。(2) The admixture according to claim (1), wherein the amidosulfonate is a calcium or magnesium amidosulfonate or a mixture thereof.
含有するコンクリート用混和剤が、更にアミノアルコー
ルを含有するものである特許請求の範囲第（１）項記載
の混和剤。(3) The admixture for concrete containing calcium thiocyanate and calcium nitrite further contains an amino alcohol.
シウムを０．８モル以上含む特許請求の範囲第（１）項
記載の混和剤。(4) The admixture according to claim (1), which contains 0.8 mol or more of calcium thiocyanate per 1 mol of calcium nitrite.
モルに対し１．０モル以上含む特許請求の範囲第（１）
項記載の混和剤。(5) Amidosulfonate to calcium nitrite 1.0
Claim No. (1) containing 1.0 mole or more per mole
Admixtures as described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15873787A JP2508101B2 (en) | 1987-06-25 | 1987-06-25 | Admixture for concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15873787A JP2508101B2 (en) | 1987-06-25 | 1987-06-25 | Admixture for concrete |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JPS643039A JPS643039A (en) | 1989-01-06 |
| JPH013039A true JPH013039A (en) | 1989-01-06 |
| JP2508101B2 JP2508101B2 (en) | 1996-06-19 |
Family
ID=15678233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15873787A Expired - Lifetime JP2508101B2 (en) | 1987-06-25 | 1987-06-25 | Admixture for concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2508101B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5422141A (en) * | 1993-03-12 | 1995-06-06 | W. R. Grace & Co.-Conn. | Corrosion inhibiting composition for reinforced concrete and method of applying same |
| JP5100983B2 (en) * | 2005-06-24 | 2012-12-19 | コンストラクション リサーチ アンド テクノロジー ゲーエムベーハー | Foaming agent for cement composition, cement composition containing the same, method for preventing shrinkage of cement composition, and use of foaming agent in cement composition |
| JP6482034B2 (en) * | 2016-12-14 | 2019-03-13 | 花王株式会社 | Hydraulic composition for centrifugal molding |
-
1987
- 1987-06-25 JP JP15873787A patent/JP2508101B2/en not_active Expired - Lifetime
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