JP3262383B2 - Concrete composition for self-filling - Google Patents
Concrete composition for self-fillingInfo
- Publication number
- JP3262383B2 JP3262383B2 JP27858092A JP27858092A JP3262383B2 JP 3262383 B2 JP3262383 B2 JP 3262383B2 JP 27858092 A JP27858092 A JP 27858092A JP 27858092 A JP27858092 A JP 27858092A JP 3262383 B2 JP3262383 B2 JP 3262383B2
- Authority
- JP
- Japan
- Prior art keywords
- self
- concrete composition
- concrete
- filling
- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (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、締め固め不要な自己充
填用コンクリート組成物に関し、更に詳しくは土木・建
築及び二次製品材料として使用するコンクリートの流動
性を高め、骨材、セメント、水等の材料分離抵抗性に優
れた性状を有し、充填時のバイブレーターによる締め固
めが不要な自己充填用コンクリート組成物に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete composition for self-compacting which does not require compaction, and more particularly to a concrete composition for use in civil engineering, construction and secondary products which enhances the fluidity of aggregates, cement, water and the like. The present invention relates to a concrete composition for self-filling which has properties such as excellent material separation resistance and does not require compaction by a vibrator at the time of filling.
【０００２】[0002]
【従来の技術】従来からコンクリート組成物の施工方法
としては、鉄筋を配筋した型枠内へコンクリートを投入
してバイブレーターの振動により締め固めを行うのが一
般的である。しかし、近年打設時のバイブレーターによ
る騒音公害、更にコンクリート業界の人手不足が問題と
なっている。2. Description of the Related Art Conventionally, as a method of applying a concrete composition, it has been general that concrete is put into a formwork with reinforcing bars and compacted by vibrating a vibrator. However, in recent years, noise pollution due to vibrators during casting and shortage of manpower in the concrete industry have become problems.
【０００３】これらの問題点に対し、振動締め固めの不
要な自己充填性を持つコンクリート組成物の研究が始ま
っているが、実用化にはまだ問題点が多いのが現状であ
る。[0003] In response to these problems, research has been started on concrete compositions having self-compacting properties that do not require vibration compaction, but there are still many problems in practical use.
【０００４】[0004]
【発明が解決しようとする課題】一般にコンクリートの
流動性を高めると骨材の分離が生じ、粗骨材が絡みあっ
て充填性が悪くなるばかりでなく、均一なコンクリート
が得られないことから強度低下をきたす。また水溶性高
分子を添加したコンクリート、例えば水中コンクリート
〔特公昭62−35984 号公報〕やハイパフォーマンスコン
クリート〔コンクリート工学年次論文集、 699〜704 頁
（1989）〕では骨材の分離は抑制されるものの粘性が高
くなり、充填作業が困難になるばかりではなく、水溶性
高分子の性質である硬化時間の遅延による強度発現が著
しく遅くなる。従って、施工時の型枠にかかる側圧の上
昇、脱型時間の遅延等が課題となる。In general, when the fluidity of concrete is increased, the aggregates are separated, and the aggregates are entangled with each other to deteriorate the filling property. Causes a decline. In concrete containing a water-soluble polymer, for example, underwater concrete (Japanese Patent Publication No. 62-35984) and high-performance concrete (Concrete Engineering Annual Papers, 699-704 (1989)), separation of aggregates is suppressed. However, not only the viscosity becomes high and the filling operation becomes difficult, but also the strength development due to the delay of the curing time, which is a property of the water-soluble polymer, is significantly slowed down. Therefore, problems such as an increase in lateral pressure applied to the formwork during construction, a delay in demolding time, and the like become problems.
【０００５】[0005]
【課題を解決するための手段】本発明者らは高流動性で
分離抵抗性が大きく、自己充填性があり、且つ硬化時間
による強度への影響が少ないコンクリート組成物を得る
ために鋭意検討の結果、本発明の自己充填用コンクリー
ト組成物を完成するに至った。Means for Solving the Problems The present inventors have intensively studied to obtain a concrete composition having a high fluidity, a large separation resistance, a self-compacting property and a small influence of the curing time on the strength. As a result, the self-filling concrete composition of the present invention was completed.
【０００６】即ち、本発明は、セルローズ粉末をコンク
リート１ｍ 3 当たり２〜10体積％と高性能減水剤を含有
し、JIS-A-1101記載のスランプ試験法でスランプフロー
値が45cm以上であることを特徴とする自己充填用コンク
リート組成物に関する。That is, according to the present invention, the cellulose powder is condensed.
Containing lied 1 m 3 per 2-10 vol% and superplasticizer, to a self-compacting concrete composition slump flow value is equal to or is 45cm or more in slump test method JIS-A-1101 described.
【０００７】本発明において自己充填用コンクリート組
成物とは、JIS-A-1101に規定するスランプ試験において
スランプフロー値が45cm以上の高流動性を示す領域であ
って、セルローズ粉末と高性能減水剤の混入を基本とす
るもので、増粘剤や水溶性高分子のような硬化遅延をき
たす物質は含まないものであり、尚かつ分離抵抗性を満
足し得るものである。[0007] In the present invention, the concrete composition for self-filling is a region showing a high fluidity with a slump flow value of 45 cm or more in a slump test specified in JIS-A-1101, and comprises a cellulose powder and a high-performance water reducing agent. It does not contain substances that cause curing delay, such as thickeners and water-soluble polymers, and can satisfy separation resistance.
【０００８】本発明の自己充填用コンクリート組成物
は、通常のコンクリート組成と同様にセメント類、細骨
材、粗骨材を主成分とし、更にセルローズ粉末と高性能
減水剤を含むものである。セルローズ粉末は保水能が高
く、分離抵抗に対して極めて有効であり、しかもセメン
トに対する硬化遅延がないことから上述の欠点を解消す
るものである。The self-compacting concrete composition of the present invention contains cements, fine aggregates and coarse aggregates as main components, as well as ordinary concrete compositions, and further contains cellulose powder and a high-performance water reducing agent. Cellulose powder has a high water retention capacity, is extremely effective for separation resistance, and has no hardening delay with respect to cement.
【０００９】セルローズ粉末の混入量はコンクリート
(１ｍ3)当たり２〜10体積％である。２体積％以下では
分離抵抗性が充分ではなく、また10体積％を上回れば増
粘による流動性の低下をきたすので好ましくない。The mixing amount of cellulose powder is concrete
It is 2 to 10% by volume per (1 m 3 ). If it is less than 2% by volume, the separation resistance is not sufficient, and if it exceeds 10% by volume, the fluidity decreases due to thickening, which is not preferable.
【００１０】本発明に使用するセルローズ粉末は通常市
販されているもの、例えば、商品名セルトップ（（株）
興人社製）、商品名ＫＣフロック（山陽国策パルプ
（株）社製）、商品名アビセル（旭化成（株）社製）等
が使用される。The cellulose powder used in the present invention is generally commercially available, for example, Celltop (trade name)
Kojinsha), KC Floc (trade name, manufactured by Sanyo Kokusaku Pulp Co., Ltd.), and Avicel (trade name, manufactured by Asahi Kasei Corporation) are used.
【００１１】また、平均粒径が２〜100 μm であるセル
ローズ粉末が、特に分離抵抗性と流動化性に有効であ
る。平均粒径２μm 未満のものの製造は現実には困難で
あり、また平均粒径 100μm 以上のものでは分離抵抗性
が充分ではない。Cellulose powder having an average particle size of 2 to 100 μm is particularly effective for separation resistance and fluidity. It is practically difficult to produce a product having an average particle size of less than 2 μm, and if the average particle size is more than 100 μm, the separation resistance is not sufficient.
【００１２】本発明のコンクリート組成物において高流
動性（スランプフロー値45cm以上）を得るために使用す
る高性能減水剤としては、ナフタレンスルホン酸塩ホル
ムアルデヒド縮合物（例えば、マイテイ１５０；花王
（株）社製）、メラミンスルホン酸塩ホルムアルデヒド
縮合物（例えば、マイテイ１５０Ｖ−２；花王（株）社
製）、ポリカルボン酸もしくはエステルもしくはその塩
（例えば、チュポールＨＰ−８；竹本油脂（株）社
製）、精製リグニンスルホン酸もしくはその塩（例え
ば、サンフローＨＰ−５００；山陽国策パルプ（株）社
製）、ポリスチレンスルホン酸塩（例えば、グラリオン
Ｓ−１００；ライオン（株）社製）、フェノールおよび
／又はアニリンスルホン酸骨格を有するホルムアルデヒ
ド縮合物又は共縮合物（例えば、パリックＦＰ−２００
Ｓ；藤沢薬品（株）社製）等が用いられる。The high-performance water reducing agent used to obtain high fluidity (slump flow value of 45 cm or more) in the concrete composition of the present invention includes naphthalene sulfonate formaldehyde condensate (for example, Mighty 150; Kao Corporation) Melamine sulfonate formaldehyde condensate (for example, Mighty 150V-2; manufactured by Kao Corporation), polycarboxylic acid or ester or a salt thereof (for example, Chupol HP-8; manufactured by Takemoto Yushi Co., Ltd.) ), Purified ligninsulfonic acid or a salt thereof (for example, Sunflow HP-500; manufactured by Sanyo Kokusaku Pulp Co., Ltd.), polystyrenesulfonic acid salt (for example, Glarion S-100; manufactured by Lion Corporation), phenol and And / or formaldehyde condensate or co-condensate having an anilinesulfonic acid skeleton (eg, For example, Palic FP-200
S; manufactured by Fujisawa Pharmaceutical Co., Ltd.).
【００１３】高性能減水剤の添加量は、セメントに対し
て有効成分で 0.6〜3.0 重量％が好ましい。The amount of the high-performance water reducing agent is preferably 0.6 to 3.0% by weight of the active ingredient based on the cement.
【００１４】本発明に於いて使用されるセメント類及び
細骨材、粗骨材等は限定するものではなく、通常のコン
クリートに使用するもので例えば、普通ポルトランドセ
メント、早強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等のセメント、川砂、海砂、砕砂
等の細骨材、川砂利、砕石等の粗骨材が使用される。ま
た、混和材、例えば、高炉スラグ、フライアッシュ、シ
リカヒューム、石粉等を含むコンクリートにも使用する
ことができる。The cement, fine aggregate, coarse aggregate and the like used in the present invention are not limited, and those used for ordinary concrete include, for example, ordinary Portland cement, early-strength Portland cement, blast furnace cement Cement such as fly ash cement, fine aggregate such as river sand, sea sand, and crushed sand, and coarse aggregate such as river gravel and crushed stone are used. It can also be used for concrete containing admixtures, for example, blast furnace slag, fly ash, silica fume, stone powder and the like.
【００１５】また、本発明のコンクリート組成物は、コ
ンクリート成型体に使用される。コンクリート成型体
は、特に限定されるものではなく、通常バイブレーター
によって締め固められている成型体が対象となる。The concrete composition of the present invention is used for molded concrete. The concrete molded body is not particularly limited, and is usually a molded body compacted by a vibrator.
【００１６】本発明のコンクリート組成物の製造法は、
特に限定するものではなく、ミキサー混練時に全材料を
一括投入あるいは分割投入のいずれでもよい。また高性
能減水剤とセルローズパウダーの添加も同様であり、粉
末状で添加する方法あるいは水に溶解または分散させて
投入する方法のいずれの方法でも可能である。The method for producing the concrete composition of the present invention comprises:
There is no particular limitation, and all materials may be charged at once or dividedly charged at the time of kneading the mixer. The same applies to the addition of a high-performance water reducing agent and cellulose powder, and any of a method of adding a powder or a method of dissolving or dispersing in water and adding the same is also possible.
【００１７】[0017]
【実施例】以下、実施例により本発明を説明するが、本
発明はこれらの実施例に限定されるものではない。EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to these examples.
【００１８】実施例１ 用いた材料を以下に示す。 ・セメント ：中央セメント社製 比重＝3.16 ・細骨材 ：紀の川産川砂 比重＝２．５７ ・粗骨材 ：宝塚産砕石 比重＝2.60 ・セルローズ：商品名セルトップ（（株）興人社製）を
粒度調整した。 記号Ｓ−１：平均粒径 3.5μm 記号Ｓ−２：平均粒径 21.3μm 記号Ｓ−３：平均粒径 44.2μm 記号Ｓ−４：平均粒径 92.5μm 記号Ｓ−５：平均粒径 123.2μm ・高性能減水剤：前述のものを選定して実施した。 記号Ｋ−１：マイティ１５０；花王（株）社製 記号Ｋ−２：マイティ１５０Ｖ−２；花王（株）社製 記号Ｋ−３：チュポールＨＰ−８；竹本油脂（株）社製 記号Ｋ−４：サンフローＨＰ−５００；山陽国策パルプ
（株）社製 記号Ｋ−５：グラリオンＳ−１００；ライオン（株）社
製 記号Ｋ−６：パリックＦＰ−２００Ｓ；藤沢薬品（株）
社製 ・比較水溶性高分子 記号Ｈ−１：メチルセルローズ（メトローズ６０ＳＨ、
信越化学（株）社製） 表１にセルローズパウダーを含むコンクリート組成の配
合を示す。Example 1 Materials used are shown below. -Cement: Chuo Cement Co., Ltd. Specific gravity = 3.16-Fine aggregate: River sand from Kinokawa specific gravity = 2.57-Coarse aggregate: Crushed stone from Takarazuka specific gravity = 2.60-Cellulose: brand name Celltop (produced by Kojin Co., Ltd.) Was adjusted for particle size. Symbol S-1: Average particle size 3.5 μm Symbol S-2: Average particle size 21.3 μm Symbol S-3: Average particle size 44.2 μm Symbol S-4: Average particle size 92.5 μm Symbol S-5: Average particle size 123.2 μm -High performance water reducing agent: The above-mentioned one was selected and implemented. Symbol K-1: Mighty 150; manufactured by Kao Corporation Symbol K-2: Mighty 150V-2; manufactured by Kao Corporation Symbol K-3: Chupol HP-8; Symbol K- manufactured by Takemoto Yushi Co., Ltd. 4: Sunflow HP-500; Sanyo Kokusaku Pulp Co., Ltd. symbol K-5: Glarion S-100; Lion Co., Ltd. symbol K-6: Palic FP-200S; Fujisawa Pharmaceutical Co., Ltd.
-Comparative water-soluble polymer Symbol H-1: Methylcellulose (Metroze 60SH,
(Shin-Etsu Chemical Co., Ltd.) Table 1 shows the composition of the concrete composition containing cellulose powder.
【００１９】表２に高性能減水剤を添加した場合のスラ
ンプフロー値（cm）とコンクリートの分離抵抗性、圧縮
強度（24時間後）を示す。スランプフロー値（cm）は60
±５cmになるように高性能減水剤を添加した。分離抵抗
性の評価を下記に示す。 ○：骨材分離及び水の分離なし。 ×：骨材分離及び水の分離あり。Table 2 shows the slump flow value (cm), the separation resistance of concrete and the compressive strength (after 24 hours) when a high-performance water reducing agent was added. Slump flow value (cm) is 60
A high performance water reducing agent was added so as to be ± 5 cm. The evaluation of separation resistance is shown below. ：: No separation of aggregate and water. X: Aggregate separation and water separation.
【００２０】[0020]
【表１】 [Table 1]
【００２１】[0021]
【表２】 [Table 2]
【００２２】[0022]
【発明の効果】本発明の自己充填用コンクリート組成物
を用いれば、高流動性と分離抵抗性に優れ、しかも初期
強度の確保が可能になることから、コンクリートの使用
方法と施工方法が飛躍的に改善される。特にコンクリー
トの製造においては騒音の解消、製造の合理化への波及
効果が大きい。EFFECTS OF THE INVENTION The use of the concrete composition for self-filling of the present invention is excellent in high fluidity and separation resistance and can secure the initial strength. To be improved. Particularly in the production of concrete, there is a great ripple effect on noise reduction and production rationalization.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) C04B 24/38 C04B 16/02 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) C04B 24/38 C04B 16/02
Claims (3)
たり２〜10体積％と高性能減水剤を含有し、JIS-A-1101
記載のスランプ試験法でスランプフロー値が45cm以上で
あることを特徴とする自己充填用コンクリート組成物。1. A cellulose powder concrete 1 m 3 equivalents
Contains 2 to 10% by volume of high performance water reducing agent, JIS-A-1101
A self-compacting concrete composition characterized by having a slump flow value of 45 cm or more according to the slump test method described.
m であることを特徴とする請求項１記載の自己充填用コ
ンクリート組成物。2. The cellulose powder has an average particle size of 2 to 100 μm.
The self-compacting concrete composition according to claim 1, wherein m is m.
ホルムアルデヒド縮合物、メラミンスルホン酸塩ホルム
アルデヒド縮合物、ポリカルボン酸もしくはそのエステ
ルもしくはその塩、精製リグニンスルホン酸もしくはそ
の塩、ポリスチレンスルホン酸塩、フェノールおよび／
又はアニリンスルホン酸骨格を有するホルムアルデヒド
縮合物又は共縮合物であることを特徴とする請求項１記
載の自己充填用コンクリート組成物。3. The high-performance water reducing agent is a naphthalene sulfonate formaldehyde condensate, a melamine sulfonate formaldehyde condensate, a polycarboxylic acid or an ester or a salt thereof, a purified lignin sulfonic acid or a salt thereof, a polystyrene sulfonate, a phenol. and/
The concrete composition for self-filling according to claim 1, which is a formaldehyde condensate or a cocondensate having an anilinesulfonic acid skeleton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27858092A JP3262383B2 (en) | 1992-10-16 | 1992-10-16 | Concrete composition for self-filling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27858092A JP3262383B2 (en) | 1992-10-16 | 1992-10-16 | Concrete composition for self-filling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06127998A JPH06127998A (en) | 1994-05-10 |
| JP3262383B2 true JP3262383B2 (en) | 2002-03-04 |
Family
ID=17599247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27858092A Expired - Fee Related JP3262383B2 (en) | 1992-10-16 | 1992-10-16 | Concrete composition for self-filling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3262383B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002070428A1 (en) * | 2001-03-01 | 2002-09-12 | The Trustees Of Columbia University In The City Of New York | Admixture to improve consolidation of cement composition with low moisture content |
| JP5671430B2 (en) * | 2011-09-02 | 2015-02-18 | ハリマ化成株式会社 | Modified lignin and phenolic resin molding material containing the same |
| KR101841329B1 (en) | 2015-12-11 | 2018-03-23 | 한양대학교 산학협력단 | Test Device and Test Method Using the Same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5532664B2 (en) * | 1972-10-25 | 1980-08-26 | ||
| JPH01160852A (en) * | 1987-12-18 | 1989-06-23 | Tokyu Constr Co Ltd | Extremely highly fluidized concrete |
| JPH0791103B2 (en) * | 1989-07-13 | 1995-10-04 | 日本国土開発株式会社 | Concrete mix composition |
-
1992
- 1992-10-16 JP JP27858092A patent/JP3262383B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06127998A (en) | 1994-05-10 |
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