JPH0794340B2 - Hydraulic cement admixture - Google Patents
Hydraulic cement admixtureInfo
- Publication number
- JPH0794340B2 JPH0794340B2 JP7950393A JP7950393A JPH0794340B2 JP H0794340 B2 JPH0794340 B2 JP H0794340B2 JP 7950393 A JP7950393 A JP 7950393A JP 7950393 A JP7950393 A JP 7950393A JP H0794340 B2 JPH0794340 B2 JP H0794340B2
- Authority
- JP
- Japan
- Prior art keywords
- cement admixture
- hydraulic cement
- water
- hydrogen
- admixture
- 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
Links
- 239000011396 hydraulic cement Substances 0.000 title claims description 11
- 229920001577 copolymer Polymers 0.000 claims description 12
- 239000000178 monomer Substances 0.000 claims description 9
- 238000007334 copolymerization reaction Methods 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 229910052783 alkali metal Inorganic materials 0.000 claims description 3
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 150000001340 alkali metals Chemical class 0.000 claims description 2
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- 125000002947 alkylene group Chemical group 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O ammonium group Chemical group [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 2
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- 150000002431 hydrogen Chemical class 0.000 claims description 2
- 150000002762 monocarboxylic acid derivatives Chemical class 0.000 claims description 2
- 150000001990 dicarboxylic acid derivatives Chemical class 0.000 claims 1
- 239000004568 cement Substances 0.000 description 16
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 9
- 230000014759 maintenance of location Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- XHZPRMZZQOIPDS-UHFFFAOYSA-N 2-Methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid Chemical compound OS(=O)(=O)CC(C)(C)NC(=O)C=C XHZPRMZZQOIPDS-UHFFFAOYSA-N 0.000 description 3
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- -1 alkali metal salts Chemical class 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005227 gel permeation chromatography Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000001603 reducing effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- UVDYBBRVDUKNFV-UHFFFAOYSA-N 2-(prop-2-enoylamino)ethanesulfonic acid Chemical compound OS(=O)(=O)CCNC(=O)C=C UVDYBBRVDUKNFV-UHFFFAOYSA-N 0.000 description 1
- 229920000536 2-Acrylamido-2-methylpropane sulfonic acid Polymers 0.000 description 1
- FKOZPUORKCHONH-UHFFFAOYSA-N 2-methylpropane-1-sulfonic acid Chemical compound CC(C)CS(O)(=O)=O FKOZPUORKCHONH-UHFFFAOYSA-N 0.000 description 1
- LRQCBMGUUWENBW-UHFFFAOYSA-N 3-(2-methylprop-2-enoylamino)propane-1-sulfonic acid Chemical compound CC(=C)C(=O)NCCCS(O)(=O)=O LRQCBMGUUWENBW-UHFFFAOYSA-N 0.000 description 1
- AYKYXWQEBUNJCN-UHFFFAOYSA-N 3-methylfuran-2,5-dione Chemical compound CC1=CC(=O)OC1=O AYKYXWQEBUNJCN-UHFFFAOYSA-N 0.000 description 1
- OFNISBHGPNMTMS-UHFFFAOYSA-N 3-methylideneoxolane-2,5-dione Chemical compound C=C1CC(=O)OC1=O OFNISBHGPNMTMS-UHFFFAOYSA-N 0.000 description 1
- OZAIFHULBGXAKX-VAWYXSNFSA-N AIBN Substances N#CC(C)(C)\N=N\C(C)(C)C#N OZAIFHULBGXAKX-VAWYXSNFSA-N 0.000 description 1
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 125000001142 dicarboxylic acid group Chemical group 0.000 description 1
- 150000001991 dicarboxylic acids Chemical class 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、水硬性セメント混和
剤、特に、優れた初期流動性と流動保持性を示し、しか
も経時に伴う空気量の変化が極めて小さい水硬性セメン
ト混和剤に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic cement admixture, and more particularly to a hydraulic cement admixture which exhibits excellent initial fluidity and fluidity-retaining property, and whose air content changes little over time. is there.
【０００２】[0002]
【従来の技術とその課題】従来から、コンクリートを製
造する際には、ワーカビリティの改善や減水等を目的と
して各種の混和剤が使用されている。2. Description of the Related Art Conventionally, various admixtures have been used in the production of concrete for the purpose of improving workability and reducing water.
【０００３】ところで、優れた初期流動性と流動保持性
が得られる混和剤として、従来、２−アクリルアミド−
２−メチルプロパンスルホン酸（ＡＭＰＳ）系の共重合
体が知られている（特開平３−２２８８５６号）。By the way, as an admixture which can obtain excellent initial fluidity and fluidity retention, 2-acrylamido-
A 2-methylpropanesulfonic acid (AMPS) -based copolymer is known (JP-A-3-228856).
【０００４】この発明は、ＡＭＰＳ系の共重合体のモノ
マー成分の組合せを工夫することにより、従来のものよ
りも一段と優れた初期流動性と流動保持性を示し、しか
も経時に伴う空気量の変化も極め小さい水硬性セメント
混和剤を得ようとするものである。In the present invention, by devising the combination of the monomer components of the AMPS type copolymer, the initial fluidity and the fluidity retaining ability which are far superior to those of the conventional ones are exhibited, and moreover, the change of the air amount with the passage of time. The aim is to obtain an extremely small hydraulic cement admixture.
【０００５】[0005]
【課題を解決するための手段】この発明の水硬性セメン
ト混和剤は、下記（ａ）および（ｂ）のモノマー成分の
共重合比が、モル比で（ａ）／（ｂ）＝５０／５０〜９
０／１０の範囲にあり、重量平均分子量が５０００以上
の水溶性共重合体からなる。In the hydraulic cement admixture of the present invention, the copolymerization ratio of the following monomer components (a) and (b) is (a) / (b) = 50/50 in molar ratio. ~ 9
It consists of a water-soluble copolymer having a weight average molecular weight of 5,000 or more in the range of 0/10.
【０００６】（ａ）：下記一般式（Ｉ）で示されるＮ−
置換−α、β−不飽和モノカルボン酸アミド誘導体 Ｒ1 ：水素または低級アルキル基 Ｒ2 ：炭素数１〜４の直鎖または分岐状アルキレン基 Ｘ：水素、アルカリ金属、アルカリ土類金属、有機アン
モニウム基 （ｂ）：エチレン性不飽和ジカルボン酸無水物(A): N- represented by the following general formula (I)
Substituted-α, β-unsaturated monocarboxylic acid amide derivative R 1 : hydrogen or lower alkyl group R 2 : linear or branched alkylene group having 1 to 4 carbon atoms X: hydrogen, alkali metal, alkaline earth metal, organic ammonium group (b): ethylenically unsaturated dicarboxylic acid anhydride object
【０００７】[0007]
【作用】上記の水溶性共重合体を、セメント混練物に添
加すると、極めて高い初期流動性と流動保持性が得ら
れ、空気量の変化が極めて小さくなる。When the above water-soluble copolymer is added to the cement kneaded product, extremely high initial fluidity and fluidity retention are obtained, and the change in the amount of air becomes extremely small.
【０００８】[0008]
【実施例】この発明で使用するモノマー成分（ａ）とし
ては、２−アクリルアミドー２−メチルプロパンスルホ
ン酸（ＡＭＰＳ）、２−アクリルアミドエタンスルホン
酸、３−メタクリルアミドプロパンスルホン酸またはこ
れらの塩等が挙げられる。Examples As the monomer component (a) used in the present invention, 2-acrylamido-2-methylpropanesulfonic acid (AMPS), 2-acrylamidoethanesulfonic acid, 3-methacrylamidopropanesulfonic acid or salts thereof, etc. Is mentioned.
【０００９】また、モノマー成分（ｂ）としては、無水
マレイン酸、無水イタコン酸、無水シトラコン酸または
その塩等が挙げられる。Examples of the monomer component (b) include maleic anhydride, itaconic anhydride, citraconic anhydride or salts thereof.
【００１０】これらのモノマー成分における塩として
は、アルカリ金属塩、アルカリ土類金属塩、アンモニウ
ム塩、アルカノールアミン塩等の有機アンモニウム塩が
挙げられる。Examples of salts in these monomer components include organic ammonium salts such as alkali metal salts, alkaline earth metal salts, ammonium salts and alkanolamine salts.
【００１１】この発明の水硬性セメント混和剤の配合量
は、対セメント固形分として0.01％〜５％、できれば0.
05〜１.5重量％の範囲が好ましい。また、水硬性セメン
ト混和剤の添加方法としては、水溶液としても粉末とし
ても使用でき、またその添加時期は使用目的に応じて選
択でき、例えばセメント組成物の練り混ぜ水に添加して
もよく、セメント組成物の練り混ぜ後に添加して練り混
ぜることも可能である。混和剤の使用にあたり必ずしも
単独で使用する必要はなく、必要に応じて公知のＡＥ
剤、ＡＥ減水剤、高性能ＡＥ減水剤、硬化促進剤、凝結
遅延剤、防錆剤、ポリマー混和剤等のコンクリート混和
材料を併用することができる。対象とするセメントは各
種ポルトランドセメント、混合セメント、フライアッシ
ュセメント、特殊セメント等の水硬性セメントを挙げる
ことができる。The blending amount of the hydraulic cement admixture of the present invention is 0.01% to 5% as solid content of cement, and preferably 0.
The range of 05 to 1.5% by weight is preferable. Further, as a method for adding the hydraulic cement admixture, it can be used as an aqueous solution or as a powder, and its addition timing can be selected according to the purpose of use, for example, it may be added to the water for mixing the cement composition, It is also possible to add and knead after mixing the cement composition. In using the admixture, it is not always necessary to use the admixture alone, and if necessary, known AE
A concrete admixture material such as an agent, an AE water reducing agent, a high-performance AE water reducing agent, a hardening accelerator, a setting retarder, a rust preventive, a polymer admixture and the like can be used in combination. Target cements include various types of portland cements, mixed cements, fly ash cements, hydraulic cements such as special cements.
【００１２】この発明の水溶性共重合体の製造方法はラ
ジカル開始剤の存在下、上記モノマー成分（ａ）および
（ｂ）を共重合させることによって得られる。The method for producing a water-soluble copolymer of the present invention can be obtained by copolymerizing the above monomer components (a) and (b) in the presence of a radical initiator.
【００１３】この発明の水溶性共重合体は、上記モノマ
ー成分（ａ）、（ｂ）の共重合比がモル比で（ａ）／
（ｂ）＝５０／５０〜９０／１０、好ましくは５０／５
０〜８０／２０の範囲にあることが必要である。その共
重合比が９０／１０を越えると初期分散性および分散保
持性が劣り、共重合比が５０／５０未満にする事は技術
的に非常に困難である。また、モノマー成分（ｂ）は共
重合体中ではジカルボン酸無水物構造をとることを必須
としており、生成の過程で一部のジカルボン酸無水物が
分解しジカルボン酸構造あるいは、ジカルボン酸エステ
ル構造になってもジカルボン酸無水物構造を有していれ
ば問題はない。In the water-soluble copolymer of the present invention, the copolymerization ratio of the above monomer components (a) and (b) is (a) /
(B) = 50/50 to 90/10, preferably 50/5
It should be in the range of 0 to 80/20. If the copolymerization ratio exceeds 90/10, the initial dispersibility and dispersion retention are poor, and it is technically very difficult to set the copolymerization ratio to less than 50/50. Further, the monomer component (b) is essentially required to have a dicarboxylic acid anhydride structure in the copolymer, and a part of the dicarboxylic acid anhydride is decomposed in the process of generation to form a dicarboxylic acid structure or a dicarboxylic acid ester structure. However, there is no problem as long as it has a dicarboxylic acid anhydride structure.
【００１４】この発明の共重合体は、重量平均分子量で
５，０００以上であることが必要であり、好ましくは１
０，０００〜２００，０００である。これは重量平均分
子量が５，０００未満であると初期流動性、流動保持性
共に劣る。The copolymer of the present invention must have a weight average molecular weight of 5,000 or more, preferably 1
It is 20,000 to 200,000. When the weight average molecular weight is less than 5,000, both initial fluidity and fluidity retention are poor.
【００１５】〔製造例〕この発明の水溶性共重合体の具
体的な製造例を示すと次のとおりである。[Production Example] A specific production example of the water-soluble copolymer of the present invention is as follows.
【００１６】攪拌棒、温度計、リフラックスコンデンサ
ー、窒素導入管を備えた容量１リットルの４つ口フラス
コに無水マレイン酸（ＭＡＨ）14.71 ｇ（0.15mol)を溶
かしたベンゼン溶液５５０ミリリットルをいれ、そこに
２−アクリルアミド−２−メチルプロパンスルホン酸
（ＡＭＰＳ）31.1ｇ（0.15mol)を溶かしたジメチルアセ
トアミド溶液１５０ミリリットルを加え窒素置換をしな
がら昇温した。６０℃になった時点でα、α’−アゾビ
ス−イソブチロニトリル（ＡＩＢＮ）0.4926ｇ（0.003m
ol) を溶かしたベンゼン溶液１５０ミリリットルを添加
し６０℃を保って８時間重合を行った。重合終了後、ベ
ンゼンを除き析出物をメタノールに溶かしその溶液をテ
トラヒドロフラン中に投入し析出させ、その析出物を減
圧乾燥し白色粉末を得た。得られた白色粉末はゲル浸透
クロマトグラフィー（ＧＰＣ）を用いて測定したところ
重量平均分子量が１０，０００であった。550 ml of a benzene solution containing 14.71 g (0.15 mol) of maleic anhydride (MAH) was placed in a 4-necked flask having a capacity of 1 liter equipped with a stir bar, a thermometer, a reflux condenser, and a nitrogen inlet tube. 150 ml of a dimethylacetamide solution in which 31.1 g (0.15 mol) of 2-acrylamido-2-methylpropanesulfonic acid (AMPS) was dissolved was added thereto, and the temperature was raised while replacing the atmosphere with nitrogen. When the temperature reached 60 ° C, α, α'-azobis-isobutyronitrile (AIBN) 0.4926 g (0.003 m
(150 ml) of a benzene solution in which ol) was dissolved was added, and polymerization was carried out at 60 ° C. for 8 hours. After completion of the polymerization, benzene was removed, the precipitate was dissolved in methanol, the solution was put into tetrahydrofuran to cause precipitation, and the precipitate was dried under reduced pressure to obtain a white powder. The weight average molecular weight of the obtained white powder was 10,000 as measured by gel permeation chromatography (GPC).
【００１７】〔実験例〕この発明の水硬性セメント混和
剤として、２−アクリルアミドー２−メチルプロパンス
ルホン酸と無水マレイン酸の共重合体Ｐ（ＡＭＰＳ−Ｍ
ＡＨ）を使用し、その性能評価を行った結果を表２に示
す。[Experimental Example] As a hydraulic cement admixture of the present invention, a copolymer P (AMPS-M) of 2-acrylamido-2-methylpropanesulfonic acid and maleic anhydride was used.
Table 2 shows the results of performance evaluation using AH).
【００１８】また、水硬性セメント混和剤として公知に
なっている他のポリマーおよびコポリマーについて、性
能評価を行った結果を表３に示す。Table 3 shows the results of performance evaluation of other polymers and copolymers known as hydraulic cement admixtures.
【００１９】なお、上記の性能評価試験は、次のように
して行った。The above performance evaluation test was conducted as follows.
【００２０】混練量が２５リットルになるように下記表
１の組成の調合で計量し、この全量とセメント混和剤の
所定量（対セメント固形分0.45wt％）を４０リットルの
可傾式ミキサーに投入して１８０秒間混練を行った。こ
の際、空気量が一定になるよう市販のＡＥ剤を混入し
た。ミキサーから混練物を取り出し、JIS A1101 に従い
スランプ値を測定、JIS A1128 に従い空気量を測定し
た。その後、練り板中でビニルシートをかぶせ静置、３
０分後、６０分後、９０分後に手練りにより攪拌し、そ
れぞれについて同様の試験法により経時におけるスラン
プ値および空気量を測定した。[0020] The kneading amount was adjusted to 25 liters by the composition shown in Table 1 below, and the total amount and a predetermined amount of cement admixture (relative to cement solid content 0.45 wt%) were added to a 40 liter tilting mixer. It was charged and kneaded for 180 seconds. At this time, a commercially available AE agent was mixed so that the amount of air was constant. The kneaded product was taken out from the mixer, the slump value was measured according to JIS A1101, and the air amount was measured according to JIS A1128. After that, cover the kneading board with a vinyl sheet and let stand for 3
After 0 minutes, 60 minutes, and 90 minutes, the mixture was stirred by hand kneading, and the slump value and the air amount over time were measured for each by the same test method.
【００２１】[0021]
【表１】 [Table 1]
【００２２】[0022]
【表２】 [Table 2]
【００２３】[0023]
【表３】 [Table 3]
【００２４】表２、３の結果より （１）実施例はいずれも比較例よりも初期流動性が高
い。From the results shown in Tables 2 and 3, (1) all the examples have higher initial fluidity than the comparative examples.
【００２５】（２）実施例はいずれも比較例よりも流動
保持性が高い。(2) Each of the examples has higher flow retention than the comparative example.
【００２６】（３）実施例はいずれも比較例よりも経時
における空気量が安定している。(3) The air amount of each of the examples is more stable than that of the comparative example.
【００２７】ことがいえる。It can be said that.
【００２８】以上のことよりこの発明のセメント混和剤
は従来のセメント混和剤として知られているものより
も、優れた性能を示すことが確認できた。From the above, it was confirmed that the cement admixture of the present invention exhibits superior performance to those known as conventional cement admixtures.
【００２９】[0029]
【発明の効果】以上のように、この発明のセメント混和
剤は、優れた初期流動性、流動保持性が得られ、しかも
セメントへの空気連行性をほとんど示さない。そのた
め、高い減水効果が得られ、水の添加量が少ない系にお
いても流動性、流動保持性が良好で、セメントの硬化特
性、硬化後の特性に悪影響を与えず高強度のセメント硬
化物を得ることができる。そのため、安定した高品質の
コンクリートを打設することが可能であり、更にコンク
リート二次製品の成型、製造においても高い減水効果と
流動性により高品質、高作業性が望める。As described above, the cement admixture of the present invention has excellent initial fluidity and fluid retention, and exhibits almost no air entrainment to cement. Therefore, a high water-reducing effect can be obtained, and even in a system with a small amount of water added, the fluidity and flow retention are good, and a cement hardened product with high strength can be obtained without adversely affecting the hardening characteristics of cement and the characteristics after hardening. be able to. Therefore, it is possible to pour stable and high-quality concrete, and further high quality and high workability can be expected due to the high water reducing effect and fluidity in the molding and manufacturing of concrete secondary products.
Claims (1)
の共重合比が、モル比で（ａ）／（ｂ）＝５０／５０〜
９０／１０の範囲にあり、重量平均分子量が５０００以
上の水溶性共重合体からなる水硬性セメント混和剤。 （ａ）：下記一般式（Ｉ）で示されるＮ−置換−α、β
−不飽和モノカルボン酸アミド誘導体 Ｒ1 ：水素または低級アルキル基 Ｒ2 ：炭素数１〜４の直鎖または分岐状アルキレン基 Ｘ：水素、アルカリ金属、アルカリ土類金属、有機アン
モニウム基 （ｂ）：エチレン性不飽和ジカルボン酸無水物1. The copolymerization ratio of the following monomer components (a) and (b) is (a) / (b) = 50/50 in molar ratio.
A hydraulic cement admixture consisting of a water-soluble copolymer having a weight average molecular weight of 5000 or more in the range of 90/10. (A): N-substituted-α, β represented by the following general formula (I)
-Unsaturated monocarboxylic acid amide derivative R 1 : hydrogen or lower alkyl group R 2 : linear or branched alkylene group having 1 to 4 carbon atoms X: hydrogen, alkali metal, alkaline earth metal, organic ammonium group (b): ethylenically unsaturated dicarboxylic acid anhydride object
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7950393A JPH0794340B2 (en) | 1993-04-06 | 1993-04-06 | Hydraulic cement admixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7950393A JPH0794340B2 (en) | 1993-04-06 | 1993-04-06 | Hydraulic cement admixture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06293543A JPH06293543A (en) | 1994-10-21 |
| JPH0794340B2 true JPH0794340B2 (en) | 1995-10-11 |
Family
ID=13691743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7950393A Expired - Lifetime JPH0794340B2 (en) | 1993-04-06 | 1993-04-06 | Hydraulic cement admixture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0794340B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118439977A (en) * | 2024-04-25 | 2024-08-06 | 华新水泥股份有限公司 | Reactive masonry cement mortar construction performance regulator and preparation method and application thereof |
-
1993
- 1993-04-06 JP JP7950393A patent/JPH0794340B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06293543A (en) | 1994-10-21 |
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