JP2000026144A - Admixture for hydraulic composition - Google Patents

Admixture for hydraulic composition

Info

Publication number
JP2000026144A
JP2000026144A JP10210471A JP21047198A JP2000026144A JP 2000026144 A JP2000026144 A JP 2000026144A JP 10210471 A JP10210471 A JP 10210471A JP 21047198 A JP21047198 A JP 21047198A JP 2000026144 A JP2000026144 A JP 2000026144A
Authority
JP
Japan
Prior art keywords
monomer
copolymer
acid
admixture
hydraulic composition
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
Application number
JP10210471A
Other languages
Japanese (ja)
Inventor
Fujio Yamato
富士桜 倭
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.)
Kao Corp
Original Assignee
Kao Corp
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 Kao Corp filed Critical Kao Corp
Priority to JP10210471A priority Critical patent/JP2000026144A/en
Publication of JP2000026144A publication Critical patent/JP2000026144A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/0068Ingredients with a function or property not provided for elsewhere in C04B2103/00
    • C04B2103/0082Segregation-preventing agents; Sedimentation-preventing agents
    • C04B2103/0083Bleeding-preventing agents

Abstract

PROBLEM TO BE SOLVED: To obtain a hardened body excellent in surface appearance with less bleeding and good work efficiency by adding an additive contg. a copolymer of a specified ester compd. monomer and a compd. monomer such as an acrylate monomer, and an oxycarboxylic acid in a specified ratio to a hydraulic compsn. SOLUTION: A monomer of formula I [where R1 and R2 are each H or methyl, (m) is 0-2, AO is 2-3C oxyalkylene, (n) is 30-300 and X is H or 1-3C alkyl] and one or more monomers of formula II or III [where R3-R5 are each H, methyl or (CH2)m2COOM2, R6 is H or methyl, M1, M2 and Y are each H or a cation and m2 is 0-2] are polymerized in a molar ratio of 1:100 to 100:100 to a wt. average mol.wt. of 3,000-500,000. The resultant copolymer is mixed with a 4-10C oxycarboxylic acid, preferably gluconic acid in a weight ratio of 100:60 to 100:150 to obtain the objective admixture applicable to a hydraulic compsn. having <=300 kg/m3 cement content per unit volume of concrete.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、単位セメント量が
300kg/m3以下の水硬性組成物に有用な混和剤に
関する。
[0001] The present invention relates to an admixture useful for a hydraulic composition having a unit cement amount of 300 kg / m 3 or less.

【0002】[0002]

【従来の技術及び発明が解決しようとする課題】コンク
リート等の水硬性組成物の水和熱による亀裂発生防止、
工事予算などの面から単位セメント量を300kg/m
3以下の貧配合にする場合があり、ナフタレンスルホン
酸系やリグニンスルホン酸系混和剤が使用されている。
2. Description of the Related Art Prevention of cracks caused by heat of hydration of hydraulic compositions such as concrete,
Unit cement amount is 300kg / m in terms of construction budget
In some cases, a poor blend of 3 or less is used, and a naphthalenesulfonic acid-based or ligninsulfonic acid-based admixture is used.

【0003】しかし、水や砂利の分離(ブリージング)
が目立ち、作業性や硬化体表面の美観が損なわれる。そ
の改善にリグニンスルホン酸系AE減水剤とアミノスル
ホン酸樹脂の配合系が提案されている(特開平8-81248
号)が、なお不十分である。
However, separation of water and gravel (breathing)
And the workability and the appearance of the surface of the cured product are impaired. To improve this, a compounding system of a ligninsulfonic acid-based AE water reducing agent and an aminosulfonic acid resin has been proposed (JP-A-8-81248).
No.) is still inadequate.

【0004】本発明は、ブリージングが少なく、作業性
及び硬化体表面の美観に優れた水硬性組成物用添加剤及
び該水硬性組成物の製造方法の提供を目的とする。
An object of the present invention is to provide an additive for a hydraulic composition, which has less bleeding, excellent workability and excellent appearance of the surface of a cured product, and a method for producing the hydraulic composition.

【0005】[0005]

【課題を解決するための手段】本発明は、下記の(イ)
成分と(ロ)成分を、(イ)/(ロ)=100/60〜
100/150の重量比率で含有する水硬性組成物用混
和剤及び該(イ)成分と(ロ)成分を水硬性組成物材料
と混和する単位セメント量300kg/m3以下の水硬性組成物
の製造方法に関する。
Means for Solving the Problems The present invention provides the following (A)
The component and the component (b) are (A) / (B) = 100 / 60-
A hydraulic composition admixture containing 100/150 by weight and a hydraulic composition having a unit cement amount of 300 kg / m 3 or less in which the component (a) and the component (b) are mixed with the hydraulic composition material. It relates to a manufacturing method.

【0006】(イ)成分:下記の式(A)で表される単
量体(a)と下記の式(B)及び(C)で表される化合
物から選ばれる1種以上の単量体(b)を主成分とする
単量体混合物を重合して得られる共重合体。
Component (a): at least one monomer selected from monomers (a) represented by the following formula (A) and compounds represented by the following formulas (B) and (C) A copolymer obtained by polymerizing a monomer mixture containing (b) as a main component.

【0007】(ロ)成分:総炭素数4〜10のオキシカル
ボン酸もしくはその塩。
(B) Component: an oxycarboxylic acid having 4 to 10 carbon atoms or a salt thereof.

【0008】[0008]

【化3】 Embedded image

【0009】(式中、R1,R2は水素原子又はメチル
基、m1は0〜2の数、AOは炭素数2〜3のオキシア
ルキレン基、nは30〜300の数、Xは水素原子又は炭素
数1〜3のアルキル基を表す。)
(Wherein, R 1 and R 2 are hydrogen atoms or methyl groups, m 1 is a number of 0 to 2, AO is an oxyalkylene group having 2 to 3 carbon atoms, n is a number of 30 to 300, and X is Represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms.)

【0010】[0010]

【化4】 Embedded image

【0011】(式中、R3〜R5は水素原子、メチル基又
は(CH2)m2COOM2、R6は水素原子又はメチル基、
1,M2,Yは水素原子または陽イオン、m2は0〜2の
数を表す)
Wherein R 3 to R 5 are a hydrogen atom, a methyl group or (CH 2 ) m 2 COOM 2 , R 6 is a hydrogen atom or a methyl group,
M 1 , M 2 , and Y represent a hydrogen atom or a cation, and m 2 represents a number from 0 to 2. )

【0012】[0012]

【発明の実施の形態】本発明が対象とする水硬性組成物
は、(イ)成分と(ロ)成分を添加して製造される貧配
合のセメントをバインダーとするものであり、単位セメ
ント量が300kg/m3以下、特には150〜300
kg/m3のセメントペースト、モルタル、コンクリー
トを含む水硬性組成物である。
BEST MODE FOR CARRYING OUT THE INVENTION The hydraulic composition to which the present invention is directed uses a poorly-mixed cement produced by adding the components (a) and (b) as a binder, and has a unit cement amount of Is 300 kg / m 3 or less, especially 150 to 300
It is a hydraulic composition containing kg / m 3 of cement paste, mortar, and concrete.

【0013】(イ)成分は分散性に優れる水溶性ビニル
共重合体であり、(ロ)成分と併用することで、セメン
ト貧配合水硬性組成物のブリージングを抑制することが
できる。
The component (A) is a water-soluble vinyl copolymer having excellent dispersibility, and when used in combination with the component (B), it is possible to suppress the bleeding of the poorly-mixed hydraulic composition having a low cement content.

【0014】本発明で使用する共重合体(イ)におい
て、式(A)で示される単量体としては、メトキシポリ
エチレングリコール、メトキシポリプロピレングリコー
ル、エトキシポリエチレンポリプロピレングリコール等
の片末端低級アルキル封鎖ポリアルキレングリコールと
アクリル酸又はメタクリル酸とのエステル化物やアクリ
ル酸又はメタクリル酸へのエチレンオキシド、プロピレ
ンオキシド付加物が用いられる。好ましくはメトキシポ
リエチレングリコールとアクリル酸、メタクリル酸との
エステル化物である。ポリアルキレングリコールの平均
付加モル数は、優れた分散性を得るため、30〜300、好
ましくは100〜200である。なお、平均付加モル数等が異
なる2種以上の単量体の混合物であってもよい。
In the copolymer (A) used in the present invention, the monomer represented by the formula (A) is a polyalkylene having a lower alkyl end-blocked at one end, such as methoxypolyethylene glycol, methoxypolypropylene glycol, or ethoxypolyethylene polypropylene glycol. Esterified products of glycol and acrylic acid or methacrylic acid or ethylene oxide or propylene oxide adducts of acrylic acid or methacrylic acid are used. Preferably, it is an esterified product of methoxypolyethylene glycol and acrylic acid or methacrylic acid. The average number of moles of polyalkylene glycol added is 30 to 300, preferably 100 to 200, in order to obtain excellent dispersibility. It should be noted that a mixture of two or more monomers having different average addition mole numbers and the like may be used.

【0015】また、式(B)で示される単量体として
は、アクリル酸、メタクリル酸、クロトン酸等の不飽和
モノカルボン酸系単量体、マレイン酸、イタコン酸、フ
マル酸等の不飽和ジカルボン酸系単量体、又はこれらの
塩、例えばアルカリ金属塩、アルカリ土類金属塩、アン
モニウム塩、アミン塩が挙げられ、好ましくはアクリル
酸、メタクリル酸、又はこれらのアルカリ金属塩であ
る。
The monomer represented by the formula (B) includes unsaturated monocarboxylic acid monomers such as acrylic acid, methacrylic acid and crotonic acid, and unsaturated monomers such as maleic acid, itaconic acid and fumaric acid. Examples thereof include dicarboxylic acid monomers and salts thereof, for example, alkali metal salts, alkaline earth metal salts, ammonium salts, and amine salts, and are preferably acrylic acid, methacrylic acid, or an alkali metal salt thereof.

【0016】また、式(C)で示される単量体として
は、アリルスルホン酸、メタリルスルホン酸、又はこれ
らの塩、例えばアルカリ金属塩、アルカリ土類金属塩、
アンモニウム塩、アミン塩が挙げられる。
Examples of the monomer represented by the formula (C) include allyl sulfonic acid, methallyl sulfonic acid, and salts thereof such as alkali metal salts and alkaline earth metal salts.
Examples include ammonium salts and amine salts.

【0017】本発明における共重合体(イ)を構成する
単量体(a)と(b)の反応単位は、単量体(a)/単
量体(b)=1/100〜100/100(モル比)の範囲が好
ましく、5/100〜50/100の範囲が、特に流動性に優れ
る。また単量体(b)としては共重合体の分子量制御の
観点より、(B)のみ、もしくはさらに(C)を加えた
ものから、更には(B)のみから選ばれるのが好まし
い。
In the present invention, the reaction units of the monomers (a) and (b) constituting the copolymer (a) are as follows: monomer (a) / monomer (b) = 1/100 to 100 / A range of 100 (molar ratio) is preferable, and a range of 5/100 to 50/100 is particularly excellent in fluidity. From the viewpoint of controlling the molecular weight of the copolymer, the monomer (b) is preferably selected from (B) alone, (C) and further (B) alone.

【0018】共重合体(イ)における単量体(a)と
(b)の合計量は、50重量%以上、特には80重量%以上
であることが好ましい。単量体(a),(b)以外の単
量体としては、例えば式(A)においてnが1から30
未満の単量体、アクリロニトリル、アクリル酸エステ
ル、アクリルアミド、メタクリルアミド、スチレン、ス
チレンスルホン酸等が挙げられる。
The total amount of the monomers (a) and (b) in the copolymer (a) is preferably at least 50% by weight, particularly preferably at least 80% by weight. As the monomer other than the monomers (a) and (b), for example, in the formula (A), n is 1 to 30.
Less than a monomer, acrylonitrile, acrylate, acrylamide, methacrylamide, styrene, styrenesulfonic acid and the like.

【0019】本発明の共重合体(イ)は、例えば特開昭
59−162163号、特公平2−7897号、特公平
2−7901号、特公平2−11542号公報等記載の
溶液重合法により製造される。
The copolymer (a) of the present invention can be prepared by a solution polymerization method described in, for example, JP-A-59-162163, JP-B-2-7897, JP-B-2-7901, and JP-B2-111542. It is manufactured by

【0020】具体的には、水や炭素数1〜4の低級アル
コール中、過硫酸アンモニウム、過酸化水素等の重合開
始剤存在下、要すれば、亜硫酸水素ナトリウムやメルカ
プトエタノール等を添加し、50〜100℃で0.5〜10時間反
応させればよい。
Specifically, in the presence of a polymerization initiator such as ammonium persulfate and hydrogen peroxide in water or a lower alcohol having 1 to 4 carbon atoms, if necessary, sodium bisulfite, mercaptoethanol or the like is added, and 50 The reaction may be performed at 100100 ° C. for 0.5 to 10 hours.

【0021】共重合体(イ)の重量平均分子量(ゲルパ
ーミエーションクロマトグラフィー法/ポリスチレンス
ルホン酸換算)は、ブリージング抑制の点より3,000〜5
00,000の範囲が良く、5,000〜100,000がより好ましい。
The weight average molecular weight (gel permeation chromatography / polystyrene sulfonic acid equivalent) of the copolymer (a) is 3,000 to 5 in view of suppression of breathing.
The range of 00,000 is good, and 5,000 to 100,000 is more preferable.

【0022】本発明における(ロ)成分の総炭素数4〜
10のオキシカルボン酸としては、グルコン酸、グルコヘ
プトン酸、アラボン酸、リンゴ酸又はクエン酸が挙げら
れ、好ましくはグルコン酸である。これらの塩として
は、例えば、アルカリ金属塩、アルカリ土類金属塩、ア
ンモニウム塩、アミン塩が挙げられ、好ましくはアルカ
リ金属塩である。
In the present invention, the component (b) has a total carbon number of 4 to 4.
The oxycarboxylic acid of 10 includes gluconic acid, glucoheptonic acid, arabonic acid, malic acid or citric acid, and is preferably gluconic acid. These salts include, for example, alkali metal salts, alkaline earth metal salts, ammonium salts, and amine salts, and are preferably alkali metal salts.

【0023】本発明においては、(イ)成分がメトキシ
ポリエチレングリコールとアクリル酸、メタクリル酸と
のエステル化物とアクリル酸、メタクリル酸又はこれら
の塩との共重合体であり、(ロ)成分がグルコン酸又は
その塩であるものが、本発明の効果に特に優れ好まし
い。
In the present invention, the component (A) is a copolymer of an esterified product of methoxypolyethylene glycol and acrylic acid or methacrylic acid with acrylic acid, methacrylic acid or a salt thereof, and the component (B) is gluconic acid. Those which are acids or salts thereof are particularly excellent in the effects of the present invention and are preferred.

【0024】本発明において、(イ)成分と(ロ)成分
の配合比はブリージング抑制のため、固形分重量比で
(イ)/(ロ)=100/60〜100/150の範囲が好まし
く、100/70〜100/100の範囲が特に好ましい。
In the present invention, the compounding ratio of the component (a) and the component (b) is preferably in the range of (a) / (b) = 100/60 to 100/150 in terms of solids weight ratio in order to suppress breathing. A range of 100/70 to 100/100 is particularly preferred.

【0025】(イ)成分と(ロ)成分の合計の添加量は
セメントに対して、0.01〜3.0重量%(固形分)が好ま
しく、0.05〜1重量%がより好ましい。
The total added amount of the components (a) and (b) is preferably 0.01 to 3.0% by weight (solid content), more preferably 0.05 to 1% by weight, based on the cement.

【0026】水硬性組成物製造時の混和剤の添加方法
は、水硬性組成物材料と同時にミキサーに投入する方法
や、予め混練りした材料へ添加する後添加の方法でもよ
く、また、(イ)成分と(ロ)成分を予め混合すること
なく、その添加量の重量比が、上記範囲となるように別
々に添加してもよい。
The method of adding the admixture during the production of the hydraulic composition may be a method in which the composition is added to the mixer at the same time as the hydraulic composition material, or a method in which the mixture is added to the previously kneaded material. The components (b) and (b) may be separately added without previously mixing them so that the weight ratio of the amounts added falls within the above range.

【0027】本発明の対象となる水硬性組成物はセメン
ト、細骨材、粗骨材を主成分とするものであるが、各種
の高炉スラグ、フライアッシュ等の各種混和材料を使用
することもできる。更に、公知の添加剤(材)、例えば
AE剤、AE減水剤、高性能減水剤、遅延剤、早強剤、
促進剤、起泡剤、発泡剤、消泡剤、増粘剤、防水剤、防
泡剤等を併用することができる。
The hydraulic composition to be used in the present invention is mainly composed of cement, fine aggregate and coarse aggregate, but various admixtures such as various blast furnace slags and fly ash may be used. it can. Further, known additives (materials) such as an AE agent, an AE water reducing agent, a high-performance water reducing agent, a retarder, an early strength agent,
Accelerators, foaming agents, foaming agents, antifoaming agents, thickeners, waterproofing agents, antifoaming agents and the like can be used in combination.

【0028】[0028]

【実施例】<共重合体(イ)の製造例>本発明の重合体
の製造に使用した単量体(a)の内容と記号を以下に示
す。但し、EOはエチレンオキシド、POはプロピレン
オキシドを表す。
EXAMPLES <Production Example of Copolymer (a)> The contents and symbols of the monomer (a) used in the production of the polymer of the present invention are shown below. Here, EO represents ethylene oxide, and PO represents propylene oxide.

【0029】A−1:メタノールEO・メタクリル酸モ
ノエステル(EO付加モル数=23) A−2:メタノールEO・メタクリル酸モノエステル
(EO付加モル数=55) A−3:メタノールEO・アクリル酸モノエステル(E
O付加モル数=90) A−4:メタノールEO・メタクリル酸モノエステル
(EO付加モル数=115) A−5:メタノールEO・メタクリル酸モノエステル
(EO付加モル数=135) A−6:アクリル酸EO・POランダム付加物(EO付
加モル数=135、PO付加モル数=25) A−7:アクリル酸PO・EOブロック付加物(PO付
加モル数=10、EO付加モル数=180) A−8:メタノールEO・メタクリル酸モノエステル
(EO付加モル数=350)
A-1: Methanol EO / methacrylic acid monoester (number of moles of added EO = 23) A-2: Methanol EO / methacrylic acid monoester (number of moles of added EO = 55) A-3: Methanol EO / acrylic acid Monoester (E
A-4: Methanol EO / methacrylic acid monoester (EO added mole number = 115) A-5: Methanol EO / methacrylic acid monoester (EO added mole number = 135) A-6: Acrylic Acid EO / PO random adduct (EO addition mol = 135, PO addition mol = 25) A-7: Acrylic acid PO / EO block adduct (PO addition mol = 10, EO addition mol = 180) -8: methanol EO / methacrylic acid monoester (number of moles of EO added = 350)

【0030】以下に共重合体(イ)の製造例を共重合体
イ−4で例示して示す。 共重合体イ−4の製造例 反応容器に水15モルを仕込み、窒素雰囲気中75℃でA−
4 0.35モル、メタクリル酸1モル、水15モルを混合溶
解したもの、20%過硫酸アンモニウム水溶液0.01モル、
及び2−メルカプトエタノール4gを同時に2時間かけ
て滴下する。次で20%過硫酸アンモニウム水溶液0.03モ
ルを30分で滴下し、1時間同温度で、更に95℃に昇温し
て35%過酸化水素水12gを加え2時間熟成する。熟成終
了後、48%水酸化ナトリウム水溶液を加えて中和、分子
量45,000の共重合体を得た。
Hereinafter, a production example of the copolymer (a) will be shown as an example of a copolymer a-4. Production Example of Copolymer A-4 15 mol of water was charged into a reaction vessel, and A-
4 0.35 mol, 1 mol of methacrylic acid, 15 mol of water mixed and dissolved, 0.01 mol of 20% ammonium persulfate aqueous solution,
And 2 g of 2-mercaptoethanol are simultaneously added dropwise over 2 hours. Next, 0.03 mol of a 20% aqueous ammonium persulfate solution was added dropwise over 30 minutes, the temperature was raised to 95 ° C. for 1 hour, 12 g of 35% aqueous hydrogen peroxide was added, and the mixture was aged for 2 hours. After completion of the ripening, a 48% aqueous sodium hydroxide solution was added to neutralize the solution to obtain a copolymer having a molecular weight of 45,000.

【0031】表1に得られた共重合体(イ)の組成及び
分子量を示す。
Table 1 shows the composition and molecular weight of the obtained copolymer (a).

【0032】[0032]

【表1】 [Table 1]

【0033】比較例として使用した市販混和剤の内容と
記号を示す。 NS:ナフタレンスルホン酸系分散剤(マイテイ150;
花王(株)製)。 LG:リグニンスルホン酸系分散剤(ポゾリスNo.70;
NMB社製)
The contents and symbols of the commercially available admixtures used as comparative examples are shown below. NS: naphthalenesulfonic acid-based dispersant (Mighty 150;
Kao Corporation). LG: Lignin sulfonic acid type dispersant (Pozoris No. 70;
NMB)

【0034】化合物(ロ)の内容と記号を示す。 R−1:グルコン酸ナトリウム R−2:リンゴ酸ナトリウムThe contents and symbols of the compound (b) are shown below. R-1: sodium gluconate R-2: sodium malate

【0035】評価方法 表2に示すコンクリート配合で、材料と混和剤を強制ミ
キサーにより3分間混練りし、下記方法で流動性等を調
整後、ブリージング率、硬化体の表面状態を評価した。
Evaluation method In the concrete composition shown in Table 2, the material and the admixture were kneaded for 3 minutes by a forced mixer, and after adjusting the fluidity and the like by the following methods, the breathing rate and the surface condition of the cured product were evaluated.

【0036】[0036]

【表2】 表2の記号と内容を以下に示す。 W: 水道水 C: 普通ポルトランドセメント(秩父小野田社製) 比重=3.16 S: 瀬戸内産海砂 比重=2.54 G: 和歌山産砕石 比重=2.59 s/a:砂/(砂+砂利) (容積率)[Table 2] The symbols and contents of Table 2 are shown below. W: Tap water C: Ordinary Portland cement (manufactured by Chichibu Onoda) Specific gravity = 3.16 S: Sea sand from Setouchi Specific gravity = 2.54 G: Wakayama crushed stone Specific gravity = 2.59 s / a: Sand / (sand + Gravel) (volume ratio)

【0037】流動性(スランプ値)は、19±1cmになる
ように本発明及び比較混和剤の添加量で、初期空気量は
4±1%になるように気泡連行剤(マイテイAE-03:
花王(株)製)と消泡剤(アンチフォームE-20:花王
(株)製)で調整した。なお、スランプ値の測定はJI
S-A1101法に準じた。
The fluidity (slump value) is the addition amount of the present invention and the comparative admixture so as to be 19 ± 1 cm, and the air entraining agent (Mighty AE-03:
It was adjusted with Kao Corp.) and an antifoaming agent (Antiform E-20: Kao Corp.). The slump value was measured by JI
According to SA1101 method.

【0038】ブリージング率の測定は、JIS-A1123
法に準じた。
Measurement of the breathing rate is based on JIS-A1123.
According to the law.

【0039】硬化体の表面美観は、調整したコンクリー
トを100×200×400mmの鋼製型枠に投入してテーブルバ
イブレーターで3000r/m×60秒間振動締め固め、20℃で
2日間養生後、脱型して下記基準で観察した。
The surface appearance of the cured product was determined by placing the prepared concrete in a steel mold of 100 × 200 × 400 mm, compacting it with a table vibrator at 3000 r / m × 60 seconds, curing it at 20 ° C. for 2 days, and removing it. It was molded and observed according to the following criteria.

【0040】 砂利がほとんど目立たず、表面が平滑 ++ 砂利が少し目立たつが、表面が平滑 + 砂利が目立ち、表面は平滑性なし −Gravel is hardly conspicuous and the surface is smooth ++ Gravel is slightly conspicuous, but the surface is smooth + gravel is conspicuous and the surface has no smoothness −

【0041】評価結果を表3,4に示す。The evaluation results are shown in Tables 3 and 4.

【0042】[0042]

【表3】 [Table 3]

【0043】[0043]

【表4】 [Table 4]

【0044】[0044]

【発明の効果】表3,表4で明らかなように、本発明の
混和剤が添加されたコンクリートは、ブリージグが少な
く、しかも肌面が綺麗である。従って、本発明によりセ
メント貧配合水硬性組成物の構築上、施工上のトラブル
の解消ができる。
As is clear from Tables 3 and 4, the concrete to which the admixture of the present invention is added has a small amount of breathing and a beautiful skin surface. Therefore, according to the present invention, troubles in construction and construction of the cement poorly-mixed hydraulic composition can be solved.

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 FI テーマコート゛(参考) C04B 103:44 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C04B 103: 44

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 下記の(イ)成分と(ロ)成分を、
(イ)/(ロ)=100/60〜100/150の重量
比率で含有する水硬性組成物用混和剤 (イ)成分:下記の式(A)で表される単量体(a)と
下記の式(B)及び(C)で表される化合物から選ばれ
る1種以上の単量体(b)を主成分とする単量体混合物
を重合して得られる共重合体。 (ロ)成分:総炭素数4〜10のオキシカルボン酸もしく
はその塩。 【化1】 (式中、R1,R2は水素原子又はメチル基、m1は0〜2
の数、AOは炭素数2〜3のオキシアルキレン基、nは
30〜300の数、Xは水素原子又は炭素数1〜3のアルキ
ル基を表す。) 【化2】 (式中、R3〜R5は水素原子、メチル基又は(CH2)m2
COOM2、R6は水素原子又はメチル基、M1,M2,Yは
水素原子又は陽イオン、m2は0〜2の数を表す。)
1. The following components (a) and (b):
(A) / (b) = 100/60 to 100/150 weight ratio of admixture for hydraulic composition containing (a) component: a monomer (a) represented by the following formula (A): A copolymer obtained by polymerizing a monomer mixture containing at least one monomer (b) selected from the compounds represented by the following formulas (B) and (C). (B) Component: oxycarboxylic acid having 4 to 10 carbon atoms or a salt thereof. Embedded image (Wherein R 1 and R 2 are hydrogen atoms or methyl groups, and m 1 is 0 to 2)
AO is an oxyalkylene group having 2 to 3 carbon atoms, and n is
The number 30 to 300, X represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms. ) (Wherein, R 3 to R 5 represent a hydrogen atom, a methyl group or (CH 2 ) m 2
COOM 2 and R 6 represent a hydrogen atom or a methyl group, M 1 , M 2 , and Y represent a hydrogen atom or a cation, and m 2 represents a number of 0 to 2. )
【請求項2】 オキシカルボン酸がグルコン酸である請
求項1記載の水硬性組成物用混和剤
2. The admixture for a hydraulic composition according to claim 1, wherein the oxycarboxylic acid is gluconic acid.
【請求項3】 共重合体(イ)を構成する単量体
(a)、(b)の反応単位が、単量体(a)/(b)=
1/100〜100/100(モル比)、かつ共重合体(イ)の
重量平均分子量が3,000〜500,000である請求項1の水硬
性組成物用混和剤
3. The reaction unit of the monomers (a) and (b) constituting the copolymer (a) is a monomer (a) / (b) =
The admixture for hydraulic compositions according to claim 1, wherein the weight average molecular weight of the copolymer (a) is 1/100 to 100/100 (molar ratio) and the weight average molecular weight of the copolymer (a) is 3,000 to 500,000.
【請求項4】 請求項(1)記載の(イ)成分と(ロ)
成分を、(イ)/(ロ)=100/60〜100/15
0の重量比率で水硬性組成物材料と混和する単位セメン
ト量300kg/m3以下の水硬性組成物の製造方法
4. The component (a) according to claim (1) and (b)
The components are (a) / (b) = 100/60 to 100/15
Method for producing a hydraulic composition having a unit cement amount of 300 kg / m 3 or less which is mixed with the hydraulic composition material at a weight ratio of 0
JP10210471A 1998-07-08 1998-07-08 Admixture for hydraulic composition Pending JP2000026144A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10210471A JP2000026144A (en) 1998-07-08 1998-07-08 Admixture for hydraulic composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10210471A JP2000026144A (en) 1998-07-08 1998-07-08 Admixture for hydraulic composition

Publications (1)

Publication Number Publication Date
JP2000026144A true JP2000026144A (en) 2000-01-25

Family

ID=16589897

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10210471A Pending JP2000026144A (en) 1998-07-08 1998-07-08 Admixture for hydraulic composition

Country Status (1)

Country Link
JP (1) JP2000026144A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003002713A (en) * 2001-06-20 2003-01-08 Kao Corp Dispersing agent for lean-mix hydraulic composition
JP2009242197A (en) * 2008-03-31 2009-10-22 Nippon Paper Chemicals Co Ltd Cement dispersing agent, concrete admixture and cement composition

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003002713A (en) * 2001-06-20 2003-01-08 Kao Corp Dispersing agent for lean-mix hydraulic composition
JP4562953B2 (en) * 2001-06-20 2010-10-13 花王株式会社 Dispersant for poorly formulated hydraulic composition
JP2009242197A (en) * 2008-03-31 2009-10-22 Nippon Paper Chemicals Co Ltd Cement dispersing agent, concrete admixture and cement composition

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