JPH06115999A - Concrete composition for self-filling - Google Patents
Concrete composition for self-fillingInfo
- Publication number
- JPH06115999A JPH06115999A JP27014192A JP27014192A JPH06115999A JP H06115999 A JPH06115999 A JP H06115999A JP 27014192 A JP27014192 A JP 27014192A JP 27014192 A JP27014192 A JP 27014192A JP H06115999 A JPH06115999 A JP H06115999A
- Authority
- JP
- Japan
- Prior art keywords
- reducing agent
- added
- water
- concrete
- self
- 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
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
- C04B30/00—Compositions for artificial stone, not containing binders
- C04B30/02—Compositions for artificial stone, not containing binders containing fibrous materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
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するものである。更に詳し
くは建築材料及び二次製品材料として使用するコンクリ
ートの粘性及び流動性を高め、骨材、セメント、水の分
離抵抗性に優れた性状を与えるもので、バイブレーター
等の振動による締め固め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。FIELD OF THE INVENTION The present invention relates to a self-compacting concrete composition which does not require compaction. More specifically, it enhances the viscosity and fluidity of concrete used as building materials and secondary product materials, and imparts excellent properties to the separation resistance of aggregates, cement, and water, and does not require compaction due to vibration such as a vibrator. The present invention relates to a self-compacting concrete composition.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】従来か
らコンクリート組成物の施工法としては、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深刻な問題となっている。二次製
品分野においては、建材ボード等の薄層化、配筋の高密
度化が進んでおり、振動機に依存する施工が困難になっ
てきている。2. Description of the Related Art Conventionally, as a conventional method for constructing a concrete composition, it is general to put concrete into a form frame having reinforcing bars and to perform compaction by vibrating a vibrator. is there. However, in recent years, the noise pollution caused by a vibrator when placing concrete and the shortage of manpower in the concrete industry have become serious problems. In the secondary product field, construction materials such as building boards are becoming thinner and bar reinforcement is becoming denser, making it difficult to perform construction that relies on vibrators.
【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の研究が始まってい
るが、技術的にまだ実用化に到っていないのが現状であ
る。In order to solve these problems, studies have begun on concrete having self-filling properties that do not require vibration compaction, but at present it has not yet been put into practical use technically.
【０００４】一般にコンクリートの流動性を高めると骨
材分離が生じ、配筋間及び配筋／型枠間で骨材による閉
塞が起こる。その結果、充填性の低下やコンクリート組
成の不均一化を引き起こし、コンクリート強度の低下を
招く。また、水中コンクリートのように増粘剤を添加し
たコンクリート配合では、骨材分離は抑制されるもの
の、増粘剤の性質である硬化時間の大幅な遅れと初期強
度の発現が遅いことから、建築や土木、特に工場製品へ
の応用は困難な状況である。Generally, when the fluidity of concrete is increased, the aggregate is separated, and the aggregate is occluded between the reinforcements and between the reinforcements / forms. As a result, the filling property is lowered and the concrete composition is made non-uniform, and the concrete strength is lowered. In addition, in concrete mixes with thickeners such as underwater concrete, although the separation of aggregates is suppressed, a significant delay in the curing time, which is the property of thickeners, and the slow development of initial strength It is difficult to apply it to civil engineering, especially to factory products.
【０００５】近年、ハイパフォーマンスコンクリートの
名称で報告（土木学会誌、1989年10月号）されている締
め固め不要のコンクリート組成物は、高炉スラグやフラ
イアッシュ及び増粘剤を加えたもので、水中コンクリー
トよりは硬化時間が改善されている。しかし、水／セメ
ント比が約 100％もあり、増粘剤も含まれていることか
ら、脱型強度が低く、初期の強度を必要とする土木、建
築構造物や工場製品への使用は困難である。In recent years, a compaction-free concrete composition reported under the name of high-performance concrete (Journal of Japan Society of Civil Engineers, October 1989) is a composition containing blast furnace slag, fly ash and a thickener, and It has an improved set time over concrete. However, since it has a water / cement ratio of about 100% and contains a thickener, it has low demolding strength and is difficult to use for civil engineering, building structures and factory products that require initial strength. Is.
【０００６】[0006]
【課題を解決するための手段】本発明者らは高性能減水
剤を使用した高流動コンクリートにパルプ繊維を練り水
に対して、0.1 〜5.0 重量％添加することにより、パル
プ繊維のからみによって弱い網目構造を形成し、スラン
プフロー値(JIS-A 1101 に規定）が40cm以上でも材料分
離抵抗性に優れ、自己充填性があり、かつ硬化遅延が少
ない自己充填用コンクリート組成物を完成するに到っ
た。[Means for Solving the Problems] The inventors of the present invention added pulp fibers to high-fluidity concrete using a high-performance water-reducing agent, and added 0.1 to 5.0% by weight to the mixing water. We have completed a self-compacting concrete composition that forms a mesh structure and has excellent material separation resistance even when the slump flow value (specified in JIS-A 1101) is 40 cm or more, has self-filling property, and has little hardening delay. It was.
【０００７】即ち、本発明は、高性能減水剤とパルプ繊
維を含有し、スランプフロー値(JIS-A 1101 に規定）が
40cm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, the present invention contains a high-performance water reducing agent and pulp fiber, and has a slump flow value (specified in JIS-A 1101).
The present invention relates to a self-compacting concrete composition having a size of 40 cm or more.
【０００８】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40cm以上であるコンクリートを
示す。In the present invention, the self-compacting concrete composition means concrete having a slump flow value of 40 cm or more in the slump test specified in JIS-A 1101.
【０００９】本発明における高性能減水剤とは、ナフタ
レンスルホン酸金属塩ホルムアルデヒド縮合物〔例え
ば、マイテイ１５０：花王（株）製〕やメラミンスルホ
ン酸金属塩ホルムアルデヒド縮合物〔例えば、マイテイ
１５０Ｖ−２：花王（株）製〕が挙げられる。さらに高
性能減水剤としては、メラミン、フェノール、尿素及び
アニリンのメチロール化物及びスルホン化物の群から選
ばれる１種又は２種以上の化合物のホルムアルデヒド縮
合物、例えば、フェノールスルホン酸ホルムアルデヒド
縮合物（特許No.1097647号に記載の化合物等）、フェノ
ール・スルファニル酸ホルムアルデヒド共縮合物（特開
平1-113419号公報に記載の化合物等）、さらに不飽和モ
ノカルボン酸及びその誘導体、不飽和ジカルボン酸及び
その誘導体の群から選ばれる１種又は２種以上の単量体
を重合して得られる重合物又は共重合体（特公平2-7901
号、特開平3-75252 号、特公平2-8983号に記載の化合物
等）が挙げられる。添加量はセメントに対して有効分で
0.3〜3.0 重量％添加するのが好ましい。The high-performance water-reducing agent in the present invention means a naphthalenesulfonic acid metal salt formaldehyde condensate [for example, Mighty 150: manufactured by Kao Corporation] or a melamine sulfonic acid metal salt formaldehyde condensate [for example, Mighty 150V-2: Manufactured by Kao Corporation. Further, as a high-performance water reducing agent, a formaldehyde condensate of one or more compounds selected from the group of methylol compounds and sulfonate compounds of melamine, phenol, urea and aniline, for example, phenolsulfonic acid formaldehyde condensate (Patent No. .1097647), phenol-sulfanilic acid formaldehyde co-condensates (compounds described in JP-A 1-113419), unsaturated monocarboxylic acids and their derivatives, unsaturated dicarboxylic acids and their derivatives Polymers or copolymers obtained by polymerizing one or more monomers selected from the group (Japanese Patent Publication No. 2-7901).
JP-A-3-75252, JP-B-2-8983, etc.). The amount added is effective for cement
It is preferable to add 0.3 to 3.0% by weight.
【００１０】本発明におけるパルプ繊維とは、植物体か
ら分離して得られる主としてセルロースからなる繊維を
示す。パルプ繊維には針葉樹や広葉樹などから得られる
バージンパルプや、古紙などから得られる繊維も含まれ
る。パルプ繊維量は練り水に対して、 0.1〜5.0 重量％
であり、好ましくは 0.5〜３重量％である。 0.1重量％
以下では効果が得られず、５重量％以上ではパルプの保
水性によりゲル化し、十分な流動性が得られない。The pulp fiber in the present invention means a fiber mainly composed of cellulose obtained by separating from a plant body. Pulp fibers also include virgin pulp obtained from softwood and hardwood, and fibers obtained from used paper. The amount of pulp fiber is 0.1 to 5.0% by weight based on the kneading water.
And preferably 0.5 to 3% by weight. 0.1% by weight
If the amount is 5% by weight or less, the effect is not obtained, and if the amount is 5% by weight or more, the pulp is gelated due to the water retention and sufficient fluidity cannot be obtained.
【００１１】本発明における自己充填用コンクリート組
成物は、他のセメント添加剤（材）、例えば、空気連行
剤、無水石膏系強度増進剤、活性シリカ微粉末、防水
材、減水剤、水溶性高分子、乾燥収縮低減剤、流動化
剤、防水剤、膨張剤（材）、グラスファイバー、スチー
ルファイバー、石粉、フライアッシュ、高炉スラグなど
との併用も可能である。The self-compacting concrete composition of the present invention contains other cement additives (materials) such as an air entraining agent, anhydrite-based strength enhancer, activated silica fine powder, waterproof material, water-reducing agent and high water-solubility. It can also be used in combination with molecules, drying shrinkage reducing agents, fluidizing agents, waterproofing agents, expanding agents (materials), glass fibers, steel fibers, stone powder, fly ash, blast furnace slag and the like.
【００１２】本発明に係るセメント混和剤を添加したセ
メント硬化体の製造に際し、養生方法は通常のセメント
硬化体を硬化せしめる方法で硬化させることも可能であ
り、水蒸気養生やオートクレーブ養生などの方法を用い
てもよい。In the production of a hardened cement product to which the cement admixture according to the present invention is added, the curing method may be a method of hardening an ordinary hardened cement product, such as steam curing or autoclave curing. You may use.
【００１３】以下、実施例をあげてさらに説明する。The present invention will be further described below with reference to examples.
【００１４】[0014]
【発明の効果】本発明の自己充填用コンクリート組成物
によれば、高流動性、高充填性、骨材分離抵抗性、強度
の確保が可能となることから、コンクリートの使用方
法、コンクリートの施工方法が飛躍的に改善され、特に
コンクリート製品の製造においては騒音解消、製造合理
化への波及効果が大きい。EFFECTS OF THE INVENTION According to the self-compacting concrete composition of the present invention, it becomes possible to secure high fluidity, high filling property, aggregate separation resistance, and strength. The method has been dramatically improved, and especially in the production of concrete products, it has a large ripple effect on noise reduction and production rationalization.
【００１５】[0015]
【実施例】以下に本発明の製造例及び実施例を挙げ本発
明を説明するが、本発明はこれら実施例に限定されるも
のではない。尚、以下の例における百分率は重量百分率
である。EXAMPLES The present invention will be described below with reference to production examples and examples of the present invention, but the present invention is not limited to these examples. The percentages in the following examples are weight percentages.
【００１６】 （材料） セメント（Ｃ） ：普通ポルトランドセメント（比重 3.17) 細骨材（Ｓ） ：紀ノ川産砂（比重 2.57 、ＦＭ 2.91) 粗骨材（Ｇ） ：宝塚産砕石（比重 2.61 、ＦＭ 6.34) 高炉スラグ（ＳＬ） ：比表面積 8,000cm2／ｇ、比重 2.90 フライアッシュ（ＦＡ）：比表面積 3,600cm2／ｇ、比重 2.90 （配合）上記の材料を用いて調製したコンクリート組成
物の配合組成を表１に示す。(Material) Cement (C): Normal Portland cement (specific gravity 3.17) Fine aggregate (S): Kinokawa sand (specific gravity 2.57, FM 2.91) Coarse aggregate (G): Takarazuka crushed stone (specific gravity 2.61, FM) 6.34) Blast furnace slag (SL): specific surface area 8,000 cm 2 / g, specific gravity 2.90 fly ash (FA): specific surface area 3,600 cm 2 / g, specific gravity 2.90 (compounding) Mixing of concrete composition prepared using the above materials The composition is shown in Table 1.
【００１７】[0017]
【表１】 [Table 1]
【００１８】（コンクリートの練り混ぜ方法）セメント
分散剤を予め、練り混ぜ水に溶解し、20℃にて 100リッ
トルの傾胴ミキサーを用い、50リットルのコンクリート
を３分間混練した後、スランプフローと骨材分離抵抗性
を測定した。スランプフロー試験は JIS-A 1101 に準拠
して行った。(Mixing method for concrete) Cement dispersant was dissolved in mixing water in advance, and 50 liters of concrete was kneaded for 3 minutes at 20 ° C. using a 100 liter tilting mixer, followed by slump flow. Aggregate separation resistance was measured. The slump flow test was performed according to JIS-A 1101.
【００１９】次に表１の組成物に高性能減水剤としてナ
フタレンスルホン酸ナトリウムホルムアルデヒド縮合物
（商品名：マイテイ１５０、花王（株）製）を添加し、
パルプ繊維（セルロース）量を変化させたコンクリート
のスランプフロー値（cm) 、分離抵抗性及び圧縮強度を
表２に示す。圧縮強度はコンクリート練り上がり後２時
間気中に静置した後、４時間蒸気養生して、24時間後に
JIS-A 1108法に準じて測定したものである。Next, sodium naphthalenesulfonate formaldehyde condensate (trade name: Mighty 150, manufactured by Kao Corporation) was added to the composition of Table 1 as a high-performance water reducing agent,
Table 2 shows the slump flow value (cm), separation resistance, and compressive strength of concrete in which the amount of pulp fiber (cellulose) was changed. The compressive strength is as follows: after the concrete is kneaded, it is left in the air for 2 hours, then steam-cured for 4 hours, and after 24 hours.
It is measured according to JIS-A 1108 method.
【００２０】[0020]
【表２】 [Table 2]
【００２１】表２から、本発明のコンクリート組成物
は、スランプフロー値が40cm以上の高流動性を示し、か
つ分離抵抗性が良好である。パルプ繊維量が本発明の範
囲外では分離抵抗性が劣り、十分な自己充填性コンクリ
ートが得られないのが確認できる。From Table 2, the concrete composition of the present invention exhibits high fluidity with a slump flow value of 40 cm or more and good separation resistance. It can be confirmed that when the amount of pulp fibers is outside the range of the present invention, the separation resistance is poor and a sufficient self-compacting concrete cannot be obtained.
【００２２】次に表１中の配合No.3にパルプ繊維と表３
に示す高性能減水剤又は一般減水剤を添加した比較試験
結果を表４に示す。測定方法は前記と同じである。Next, the pulp fiber and Table 3 are shown in the compound No. 3 in Table 1.
Table 4 shows the results of a comparative test in which the high-performance water reducing agent or the general water reducing agent shown in 1 was added. The measuring method is the same as above.
【００２３】[0023]
【表３】 [Table 3]
【００２４】[0024]
【表４】 [Table 4]
【００２５】表４から、本発明の高性能減水剤を添加し
た組成物は、良好な結果を示し、それに対して、一般減
水剤を添加した組成物は、流動性及び分離抵抗性の何れ
かが確保できず、十分な自己充填性コンクリートが得ら
れないことが確認できる。From Table 4, the composition containing the superplasticizer of the present invention showed good results, while the composition containing the general water reducing agent had either fluidity or separation resistance. Therefore, it can be confirmed that sufficient self-filling concrete cannot be obtained.
Claims (2)
ランプフロー値(JIS-A 1101 に規定）が40cm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 self-compacting concrete composition containing a high-performance water-reducing agent and pulp fibers, and having a slump flow value (specified in JIS-A 1101) of 40 cm or more.
0 重量％である請求項１記載の自己充填用コンクリート
組成物。2. The pulp fiber is added to the kneading water in an amount of 0.1 to 5.
The self-compacting concrete composition according to claim 1, which is 0% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27014192A JPH06115999A (en) | 1992-10-08 | 1992-10-08 | Concrete composition for self-filling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27014192A JPH06115999A (en) | 1992-10-08 | 1992-10-08 | Concrete composition for self-filling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06115999A true JPH06115999A (en) | 1994-04-26 |
Family
ID=17482120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27014192A Pending JPH06115999A (en) | 1992-10-08 | 1992-10-08 | Concrete composition for self-filling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06115999A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002004378A3 (en) * | 2000-07-10 | 2002-05-23 | Univ Michigan | Self-compacting cementitious composite |
-
1992
- 1992-10-08 JP JP27014192A patent/JPH06115999A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002004378A3 (en) * | 2000-07-10 | 2002-05-23 | Univ Michigan | Self-compacting cementitious composite |
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