JP2918461B2 - Admixture for concrete - Google Patents
Admixture for concreteInfo
- Publication number
- JP2918461B2 JP2918461B2 JP6244635A JP24463594A JP2918461B2 JP 2918461 B2 JP2918461 B2 JP 2918461B2 JP 6244635 A JP6244635 A JP 6244635A JP 24463594 A JP24463594 A JP 24463594A JP 2918461 B2 JP2918461 B2 JP 2918461B2
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- admixture
- present
- water reducing
- reducing agent
- 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 - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、土木用配合において、
単位セメント量の小さい貧配合のコンクリートや土木及
び建築用配合において、粒径・粒度等の点で品質の劣る
骨材を用いたコンクリートの品質改善に有効なコンクリ
ート用混和剤に関するものである。The present invention relates to a compound for civil engineering,
The present invention relates to a concrete admixture which is effective for improving the quality of concrete using poor aggregates in terms of particle size, particle size, etc. in poorly-mixed concrete, civil engineering and architectural formulations having a small unit cement amount.
【０００２】[0002]
【従来の技術】現在、コンクリートの製造において、コ
ンクリート用混和剤の使用は不可欠である。その中で、
ＡＥ減水剤は、フレッシュコンクリート及び硬化コンク
リートの諸性質を改善し、コンクリートの経済性を向上
させるために、レディミクストコンクリート、現場練り
の土木・建築用各種コンクリートに広範囲に使われてい
る。従来より、ＡＥ減水剤として多く用いられているも
のには、リグニンスルホン酸塩もしくはその誘導体を主
成分とするもの及びオキシ有機酸塩を主成分とするもの
がある。2. Description of the Related Art At present, in the production of concrete, the use of a concrete admixture is indispensable. inside that,
AE water reducing agents are widely used in ready-mixed concrete and various types of concrete for civil engineering and construction that are kneaded in situ in order to improve the properties of fresh concrete and hardened concrete and improve the economics of concrete. Conventionally, as the AE water reducing agent, those mainly used as a lignin sulfonate or a derivative thereof and those mainly containing an oxyorganic acid salt are exemplified.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上記のＡＥ減
水剤を使用してコンクリートを製造する場合、骨材とし
て、近年の骨材事情の悪化による粒径・粒度等の点で品
質の劣る砕砂・砕石・海砂等を用いると練り上がりのコ
ンクリート状態が悪く、材料分離が生じ、作業性、特に
ポンプ圧送性が低下することもある。この傾向は、特に
単位セメント量の小さい土木用貧配合のコンクリートや
建築用配合でも比較的単位セメント量の小さいコンクリ
ートで問題となっている。However, when concrete is manufactured using the above-mentioned AE water reducing agent, as the aggregate, crushed sand of inferior quality in terms of particle size and grain size due to the recent deterioration of the aggregate condition. -When crushed stone, sea sand, etc. are used, the concrete state after kneading is poor, material separation occurs, and workability, particularly pumpability, may be reduced. This tendency is a problem particularly in poorly-mixed concrete for civil engineering having a small unit cement amount and concrete having a relatively small unit cement amount even for a compound for construction.
【０００４】従来のＡＥ減水剤を使用した場合の上述の
問題点を解決する方法としては、 １．ポンプ圧送性改善のための配合、骨材の調整 ２．ポンプ圧送性改善に効果のあるコンクリート用混和
剤の使用が考えられる。[0004] As a method for solving the above-mentioned problems when a conventional AE water reducing agent is used, there are the following methods. 1. Formulation for improving pumpability and adjustment of aggregate. Use of a concrete admixture that is effective in improving pumpability is conceivable.
【０００５】現在、こうした目的の混和剤が数種市販さ
れてはいるが、コンクリートの品質改善効果は十分では
なかったり、他に欠点があったりする。例えば、増粘剤
にはポンプ圧送性を改善するものがあるが、対象とする
材料によっては、敏感に効果の程度が変動するため、そ
の調整が容易ではない。少しでも最適量より過剰添加す
ると逆にポンプ圧送性が低下する。また、増粘剤はその
ハンドリングが煩わしく作業性が悪い。配合、骨材の調
整もコンクリート製造サイドの材料調達等の問題があ
る。本発明は、このポンプ圧送性に優れた効果を持つコ
ンクリート用混和剤を提供するものである。[0005] At present, several types of admixtures for such purposes are commercially available, but the effect of improving the quality of concrete is not sufficient or has other disadvantages. For example, some thickeners improve the pumpability of pumping, but depending on the target material, the degree of effect fluctuates sensitively, making it difficult to adjust. On the contrary, if it is added in excess of the optimum amount, the pumping performance is reduced. Further, the thickener is cumbersome to handle and has poor workability. Adjustment of the composition and the aggregate also has problems such as material procurement on the concrete manufacturing side. The present invention provides an admixture for concrete having an excellent pumping property.
【０００６】[0006]
【課題を解決するための手段】本発明者らは、これらの
問題を解決するため種々検討した結果、通常のリグニン
スルホン酸系のＡＥ減水剤にアミノスルホン酸樹脂を特
定量配合することにより、従来のＡＥ減水剤では達成で
きなかった範囲までコンクリートの品質を改善できるこ
とを見い出して本発明に到達したものである。Means for Solving the Problems The present inventors have conducted various studies to solve these problems, and as a result, by adding a specific amount of an aminosulfonic acid resin to an ordinary ligninsulfonic acid-based AE water reducing agent, The present inventors have found that the quality of concrete can be improved to a range that cannot be achieved by a conventional AE water reducing agent, and arrived at the present invention.
【０００７】本発明は、リグニンスルホン酸塩系ＡＥ減
水剤１００重量部に対してアミノスルホン酸樹脂１〜５
０重量部が配合されてなるコンクリート用混和剤であ
る。又、本発明において、アミノスルホン酸樹脂がフェ
ノール類・スルファニル酸ホルムアルデヒド縮合物及び
ビスフェノール類・スルファニル酸ホルムアルデヒド縮
合物の中から選ばれたいずれか１種もしくは２種以上を
用いることが好ましい。[0007] The present invention relates to an aminosulfonic acid resin 1 to 5 based on 100 parts by weight of a ligninsulfonic acid salt type AE water reducing agent.
It is an admixture for concrete containing 0 parts by weight. In the present invention, the aminosulfonic acid resin is preferably one or more selected from phenols / sulfanilic acid formaldehyde condensate and bisphenols / sulfanilic acid formaldehyde condensate.
【０００８】本発明のリグニンスルホン酸塩系ＡＥ減水
剤は通常、副成分として還元性糖類等を含んでおり純度
は６０％程度のものである。およそ９０％以上の高純度
リグニンスルホン酸塩もコンクリート用混和剤として使
用されているが、本発明においては、リグニンスルホン
酸塩純度が７５％を越えると分散性が増し、ポンプ圧送
性が低下するため純度は７５％以下であることが必要で
ある。純度が７５％以下であれば、リグニンスルホン酸
塩は変成もしくは分別されたものでもよい。The ligninsulfonate-based AE water reducing agent of the present invention usually contains reducing sugars and the like as accessory components and has a purity of about 60%. High purity ligninsulfonate of about 90% or more is also used as an admixture for concrete, but in the present invention, when the ligninsulfonate purity exceeds 75%, dispersibility increases and pumpability decreases. Therefore, the purity needs to be 75% or less. If the purity is 75% or less, the lignin sulfonate may be denatured or fractionated.
【０００９】アミノスルホン酸樹脂はフェノール類・ス
ルファニル酸ホルムアルデヒド縮合物及びビスフェノー
ル類・スルファニル酸ホルムアルデヒド縮合物の中から
選ばれたいずれか１種もしくは２種以上であり、望まし
くは、ビスフェノール類・スルファニル酸ホルムアルデ
ヒド縮合物である。これらの縮合物は例えば特開平１−
１１３４１９号公報、特開平３−１４１１４２号公報記
載の方法で製造できる。The aminosulfonic acid resin is at least one selected from the group consisting of phenols / sulfanilic acid formaldehyde condensate and bisphenols / sulfanilic acid formaldehyde condensate, preferably bisphenols / sulfanilic acid. It is a formaldehyde condensate. These condensates are described in, for example,
It can be manufactured by the methods described in JP-A-113419 and JP-A-3-141142.
【００１０】また、リグニンスルホン酸塩系ＡＥ減水剤
１００部に対するアミノスルホン酸樹脂配合比は１〜５
０部である。アミノスルホン酸樹脂がこの範囲を下回る
と、コンクリートの改善効果が期待できず、またこの範
囲以上使用しても、流動性が増し、かえってコンクリー
トの状態が低下する。Also, the mixing ratio of the aminosulfonic acid resin to 100 parts of the ligninsulfonic acid salt type AE water reducing agent is 1 to 5%.
0 parts. If the aminosulfonic acid resin falls below this range, the effect of improving concrete cannot be expected, and even if the resin is used beyond this range, the fluidity will increase and the concrete state will deteriorate.
【００１１】本発明のコンクリート用混和剤はセメント
に対し、重量比で０．２５％を標準として使用すること
ができる。The concrete admixture of the present invention can be used as a standard at a weight ratio of 0.25% to cement.
【００１２】セメントは普通ポルトランドセメント、早
強ポルトランドセメント、中庸熱ポルトランドセメン
ト、耐硫酸塩ポルトランドセメント、高炉セメント、フ
ライアッシュセメント、シリカセメント、低発熱セメン
トが用いられる。また、これらはシリカヒューム、石粉
等の混和材、ＡＥ剤、減水剤、ＡＥ減水剤、高性能ＡＥ
減水剤、収縮低減剤、凝結遅延剤、凝結促進剤、増粘剤
等の混和剤とも併用できる。As the cement, ordinary Portland cement, early-strength Portland cement, moderately heated Portland cement, sulfate-resistant Portland cement, blast furnace cement, fly ash cement, silica cement and low heat-generating cement are used. These are admixtures such as silica fume and stone powder, AE agents, water reducing agents, AE water reducing agents, and high performance AEs.
It can be used in combination with an admixture such as a water reducing agent, a shrinkage reducing agent, a setting retarder, a setting accelerator, and a thickener.
【００１３】[0013]
【実施例】以下実施例により本発明を説明する。EXAMPLES The present invention will be described below with reference to examples.
【００１４】コンクリートの使用材料及び配合は次の通
りである。 水 （Ｗ）：水道水 セメント（Ｃ）：アサノポルトランドセメント 比重３．１６ 細骨材 （Ｓ）：児玉産砕砂 比重２．６０ ＦＭ２．６９ 粗骨材 （Ｇ）：青梅産砂岩砕石 比重２．７０ ＦＭ６．９０ 混和剤 Ａ ：サンフローＫ 混和剤 Ｂ ：ビスフェノールＳ・スルファニル酸ホルムアルデヒド縮合物The materials used and the composition of the concrete are as follows. Water (W): Tap water Cement (C): Asano Portland cement Specific gravity 3.16 Fine aggregate (S): Crushed sand from Kodama specific gravity 2.60 FM 2.69 Coarse aggregate (G): Sandstone crushed stone from Ome Specific gravity 2. 70 FM 6.90 Admixture A: Sunflow K Admixture B: Bisphenol S / sulfanilic acid formaldehyde condensate
【００１５】ＡＥ減水剤としてリグニンスルホン酸塩系
のサンフローＫをＡ、ビスフェノールＳ・スルファニル
酸ホルムアルデヒド縮合物をＢと略し、表１の配合によ
りコンクリート試験を行った結果を表２に示す。なお、
スランプはＪＩＳ Ａ １１０１、空気量はＪＩＳ Ａ
１１２８、ブリーディングはＪＩＳ Ａ １１２３、
圧縮強度はＪＩＳ Ａ １１０８に準拠して測定した。As a AE water reducing agent, the lignin sulfonate-based sun flow K is abbreviated as A, and the bisphenol S / sulfanilic acid formaldehyde condensate is abbreviated as B. In addition,
Slump is JIS A 1101, air volume is JIS A
1128, bleeding is JIS A 1123,
The compressive strength was measured according to JIS A 1108.
【００１６】[0016]
【表１】 [Table 1]
【００１７】[0017]
【表２】 [Table 2]
【００１８】本発明品は対照品と比較し、コンクリート
の性状を損なうことなく、材料分離の指標となるブリー
ディング量が減少しており、コンクリート状態が改善さ
れ、ポンプ圧送性も改善されていると判断される。Compared with the control product, the product of the present invention shows that the amount of bleeding, which is an index of material separation, is reduced without impairing the properties of the concrete, that the concrete condition is improved, and that pumpability is also improved. Is determined.
【００１９】また、ポンプ圧送性を評価する加圧ブリー
ディングは日本建築学会『コンクリートポンプ工法施工
指針同解説 付５．フレッシュコンクリートの圧送性お
よびレオロジー定数の試験方法（案） ａ．加圧ブリー
ディング試験方法（案）』に準拠して測定した。この試
験では、脱水量の最適範囲を越えるとポンプ圧送性が不
良と判定する。結果を図−１に示す。The pressure bleeding for evaluating the pumping performance is described in the Architectural Institute of Japan's "Concrete Pump Construction Guideline", Appendix 5. Test Method of Pumpability and Rheological Constant of Fresh Concrete (Draft) a. Pressure bleeding test method (draft)]. In this test, if the amount of dehydration exceeds the optimum range, the pumpability is determined to be poor. The results are shown in FIG.
【００２０】加圧ブリーディング試験結果において、本
発明品が脱水量を適正値に調整しポンプ圧送性を改善し
ているものと判断できる。From the results of the pressurized bleeding test, it can be determined that the product of the present invention has adjusted the amount of dehydration to an appropriate value and improved the pumping performance.
【００２１】[0021]
【発明の効果】本発明品を用いることにより、土木用配
合において、単位セメント量の小さい貧配合のコンクリ
ートや土木及び建築用配合において、粒径・粒度等の点
で品質の劣る骨材を用いてもポンプ圧送性の良好なコン
クリート組成物を製造できる。EFFECTS OF THE INVENTION By using the product of the present invention, it is possible to use aggregates of poor quality in terms of grain size and particle size in poorly-mixed concrete and civil and architectural formulations with a small unit cement amount in civil engineering formulations. However, it is possible to produce a concrete composition having good pumpability.
【図１】図１は本発明の実施例品及び対照品のポンプ圧
送性を示した脱水量と加圧時間の関係図表である。FIG. 1 is a table showing the relationship between the amount of dehydration and the pressurization time, showing the pumping ability of the product of the present invention and the control product of the present invention.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小川 勝正 埼玉県東松山市東平1551 日本製紙株式 会社 コンクリート技術研究所内 (72)発明者 高橋 仁 埼玉県東松山市東平1551 日本製紙株式 会社 コンクリート技術研究所内 (56)参考文献 特開 平６−72750（ＪＰ，Ａ) 特開 平３−141142（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) C04B 24/18 C04B 24/22 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Katsumasa Ogawa, Inventor 1551, Tohei, Higashimatsuyama-shi, Saitama Prefecture Nippon Paper Industries Co., Ltd. 56) References JP-A-6-72750 (JP, A) JP-A-3-141142 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) C04B 24/18 C04B 24/22
Claims (2)
のリグニンスルホン酸塩系ＡＥ減水剤１００重量部に対
してアミノスルホン酸樹脂１〜５０重量部が配合されて
なるコンクリート用混和剤。An admixture for concrete comprising 1 to 50 parts by weight of an aminosulfonic acid resin per 100 parts by weight of a ligninsulfonate-based AE water reducing agent having a ligninsulfonate purity of 75% or less.
スルファニル酸ホルムアルデヒド縮合物及びビスフェノ
ール類・スルファニル酸ホルムアルデヒド縮合物の中か
ら選ばれたいずれか１種もしくは２種以上である請求項
１記載のコンクリート用混和剤。2. An aminosulfonic acid resin comprising phenols
The admixture for concrete according to claim 1, wherein the admixture is one or more selected from a sulfanilic acid formaldehyde condensate and a bisphenol / sulfanilic acid formaldehyde condensate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6244635A JP2918461B2 (en) | 1994-09-13 | 1994-09-13 | Admixture for concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6244635A JP2918461B2 (en) | 1994-09-13 | 1994-09-13 | Admixture for concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0881248A JPH0881248A (en) | 1996-03-26 |
| JP2918461B2 true JP2918461B2 (en) | 1999-07-12 |
Family
ID=17121692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6244635A Expired - Fee Related JP2918461B2 (en) | 1994-09-13 | 1994-09-13 | Admixture for concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2918461B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110407501B (en) * | 2019-08-14 | 2020-07-03 | 广州基业长青新材料有限公司 | Permeable concrete strong-effect agent |
| CN111748067A (en) * | 2020-06-11 | 2020-10-09 | 安徽鑫固环保股份有限公司 | Method for synthesizing anti-freezing early-strength sulfamic acid high-efficiency water reducing agent from acetic acid wastewater |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0617256B2 (en) * | 1989-10-26 | 1994-03-09 | 日本製紙株式会社 | Water reducing agent for cement |
| JP3181103B2 (en) * | 1992-07-17 | 2001-07-03 | 日本製紙株式会社 | Cement water reducing agent, cement composition containing the same, and cured product |
-
1994
- 1994-09-13 JP JP6244635A patent/JP2918461B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0881248A (en) | 1996-03-26 |
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