JP3270443B2 - Cement modifier, cement modification method and modified cement hardened material - Google Patents
Cement modifier, cement modification method and modified cement hardened materialInfo
- Publication number
- JP3270443B2 JP3270443B2 JP2000100129A JP2000100129A JP3270443B2 JP 3270443 B2 JP3270443 B2 JP 3270443B2 JP 2000100129 A JP2000100129 A JP 2000100129A JP 2000100129 A JP2000100129 A JP 2000100129A JP 3270443 B2 JP3270443 B2 JP 3270443B2
- Authority
- JP
- Japan
- Prior art keywords
- cement
- fibers
- modifier
- fiber
- strength
- 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
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/06—Macromolecular compounds fibrous
-
- 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
- C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
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]
【発明の属する技術分野】本発明はセメント改質剤に関
するものである。[0001] The present invention relates to a cement modifier.
【０００２】[0002]
【従来の技術】一般に、セメント改質剤としては、次の
ようなタイプのものを例示できる。 （１）界面活性作用により、コンクリートのワーカビリ
ティや気象作用に対する抵抗性（凍結融解の繰り返し作
用及び中性化）等を改善させるもの （２）強度の増大又は流動性を改善させるもの （３）凝結及び硬化時間を調節するもの （４）防水効果を与えるもの （５）空気泡の作用により充填性を改善したり、重量を
軽減したりするもの （６）その他、鉄筋コンクリート用防せい剤、水中不分
離性混和剤、保水剤、乾燥収縮低減剤として作用するも
の2. Description of the Related Art In general, the following types of cement modifiers can be exemplified. (1) The one that improves the workability of the concrete and the resistance to the weather action (repeating action of freezing and thawing and the neutralization) by the surface active action (2) The one that increases the strength or improves the flowability (3) (4) A substance that gives a waterproof effect. (5) A substance that improves the filling property and reduces the weight by the action of air bubbles. (6) In addition, a rust preventive for reinforced concrete, water Acts as an inseparable admixture, water retention agent, drying shrinkage reducing agent
【０００３】コンクリート改質剤は、以上のようにコン
クリートのワーカビリティ、水密性、耐久性等のコンク
リートの品質を経済的に改善することから、現在ではほ
とんどのコンクリートに使用されている。[0003] As described above, concrete modifiers are economically improved in concrete quality such as workability, water tightness and durability, and are therefore used in most concretes at present.
【０００４】[0004]
【発明が解決しようとする課題】先に本願の発明者は、
サイズ剤を付着した繊維（例えばポリエステル繊維）か
らなる独創的なセメント改質剤を発明した（独自のノウ
ハウであって未公開）。このセメント改質剤は、セメン
トスラリー又はセメントミルクに少量添加して使用する
もので、ブリージングが防止される、セメントスラ
リー又はセメントミルクの硬化物の強度が向上する、
同硬化物のクラックの発生が防止される等の優れたセメ
ント改質効果が得られた。SUMMARY OF THE INVENTION First, the inventor of the present application
We have invented a unique cement modifier consisting of fibers (eg, polyester fibers) with a sizing agent attached (unique know-how, not disclosed). This cement modifier is used by adding a small amount to cement slurry or cement milk, preventing breathing, improving the strength of the cured product of cement slurry or cement milk,
An excellent cement modification effect such as prevention of cracks in the cured product was obtained.
【０００５】ところが、繊維にサイズ剤を付着しただけ
では、繊維同士がこすれ合ったときに静電気が発生し、
繊維が帯電する。このように帯電すると、繊維同士が静
電力によって互いに引き合って寄り集まり、セメントス
ラリー又はセメントミルク中に繊維が分散せずに偏って
しまい、前記各効果が十分に発揮されないという問題が
生じる。また、繊維が偏ると、その部分におけるセメン
トスラリー又はセメントミルクの硬化物の強度が低下す
るという問題が生じる。[0005] However, simply attaching a sizing agent to the fibers generates static electricity when the fibers rub against each other,
The fibers become charged. When charged in this way, the fibers attract each other due to electrostatic force and gather together, so that the fibers are not dispersed in the cement slurry or the cement milk but are skewed, resulting in a problem that the above-mentioned effects are not sufficiently exerted. In addition, when the fibers are unbalanced, there is a problem that the strength of the cement slurry or the hardened material of the cement milk in that portion is reduced.
【０００６】本発明の目的は、上記課題を解決し、セメ
ントスラリー又はセメントミルク中に満遍なく分散させ
ることができ、もってセメント改質効果を十分に発揮さ
せることができるセメント改質剤を提供することにあ
る。An object of the present invention is to solve the above-mentioned problems and to provide a cement modifier which can be dispersed evenly in a cement slurry or cement milk and which can sufficiently exert a cement modifying effect. It is in.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に、本発明は次の（１）〜（３）のように構成された。 （１）帯電防止剤又は繊維間の摩擦を低減させる減摩剤
の少なくとも一方を含んだ繊維長１．０ｍｍ以下の合成
繊維からなるセメント改質剤。また、セメントスラリー
又はセメントミルクに１．０ｍ3 当たり０．２５〜１．
０ｇ添加するセメント改質剤であって、帯電防止剤又は
繊維間の摩擦を低減させる減摩剤の少なくとも一方を含
んだ繊維長１．０ｍｍ以下の合成繊維からなるセメント
改質剤。 （２）帯電防止剤又は繊維間の摩擦を低減させる減摩剤
の少なくとも一方を含んだ繊維長１．０ｍｍ以下の合成
繊維からなるセメント改質剤を、セメントスラリー又は
セメントミルクに１．０ｍ3 当たり０．２５〜１．０ｇ
添加するセメント改質方法。 （３）帯電防止剤又は繊維間の摩擦を低減させる減摩剤
の少なくとも一方を含んだ繊維長１．０ｍｍ以下の合成
繊維からなるセメント改質剤を１．０ｍ3 当たり０．２
５〜１．０ｇ添加したセメントスラリー又はセメントミ
ルクが硬化してなる改質セメント硬化物。Means for Solving the Problems In order to achieve the above object, the present invention has the following constitutions (1) to (3). (1) A cement modifier comprising a synthetic fiber having a fiber length of 1.0 mm or less, containing at least one of an antistatic agent and a lubricant for reducing friction between fibers. In addition, 1.0m 3 per 0.25 in the cement slurry or cement milk.
A cement modifier containing 0 g of a synthetic fiber having a fiber length of 1.0 mm or less, which contains at least one of an antistatic agent and a lubricant for reducing friction between fibers. (2) A cement modifier made of a synthetic fiber having a fiber length of 1.0 mm or less containing at least one of an antistatic agent and a lubricant for reducing friction between fibers is added to cement slurry or cement milk in an amount of 1.0 m 3. 0.25 to 1.0 g per
Cement modification method to be added. (3) A cement modifier consisting of synthetic fibers having a fiber length of 1.0 mm or less containing at least one of an antistatic agent and a lubricant for reducing friction between fibers is added in an amount of 0.2 per 1.0 m 3.
A modified cement hardened material obtained by hardening a cement slurry or cement milk to which 5 to 1.0 g is added.
【０００８】ここで、帯電防止剤や減摩剤の含み方は、
特に限定されず、繊維表面に付着した態様や、繊維に練
り込まれた態様を例示できる。また、付着の場合、その
方法としては浸漬、塗布等を例示できる。これら（１）
（２）又は（３）において、さらに、サイズ剤を付着し
た繊維とすることもできる。Here, the way of including the antistatic agent and the lubricant is as follows.
There is no particular limitation, and examples include a mode of adhering to the fiber surface and a mode of kneading the fiber. In the case of adhesion, immersion, coating and the like can be exemplified as the method. These (1)
In (2) or (3), a fiber to which a sizing agent is attached may be further used.
【０００９】本発明に使用する「繊維」は、特に限定さ
れず、例えば合成繊維、天然繊維又は無機繊維のいずれ
でもよく、ポリエステル繊維、ポリエチレン繊維、ポリ
プロピレン繊維、ポリアミド繊維、アクリル繊維、ウレ
タン繊維、ポリ塩化ビニール繊維、ポリ塩化ビニリデン
繊維、ポリビニールアルコール繊維、アセテート繊維、
パルプ、木綿、羊毛、絹、ヤシ繊維、ガラス繊維等を例
示でき、１種又は２種以上を使用できる。好ましくはポ
リエステル繊維である。The "fiber" used in the present invention is not particularly limited, and may be, for example, any of synthetic fiber, natural fiber and inorganic fiber, such as polyester fiber, polyethylene fiber, polypropylene fiber, polyamide fiber, acrylic fiber, urethane fiber, PVC fiber, polyvinylidene chloride fiber, polyvinyl alcohol fiber, acetate fiber,
Examples thereof include pulp, cotton, wool, silk, coconut fiber, glass fiber and the like, and one or more kinds thereof can be used. Preferably it is a polyester fiber.
【００１０】繊維長は、特に限定されないが、セメント
スラリー又はセメントミルク中に均一に分散させやすい
１．０ｍｍ以下の短繊維とすることが好ましい。[0010] The fiber length is not particularly limited, but is preferably a short fiber of 1.0 mm or less, which is easily dispersed uniformly in cement slurry or cement milk.
【００１１】「帯電防止剤」としては、特に限定されな
いが、親水性モノマー又は親水性ポリマーを含むもの、
界面活性剤（カチオン性、アニオン性、両性及びノニオ
ン性を含む。）、シリコン、金属錯体等を例示でき、１
種又は２種以上を使用できる。具体的には、クラレ社製
の商品「ＡＳ−２２」（アルカンスルホネートと水との
混合物）や、互応化学工業社の商品「サイテックス シ
リコン５３」（シリコンオイルの乳化物と水との混合
物）を例示できる。The "antistatic agent" is not particularly limited, but includes a hydrophilic monomer or a hydrophilic polymer,
Examples include surfactants (including cationic, anionic, amphoteric and nonionic), silicon, metal complexes and the like.
Species or two or more can be used. Specifically, a product "AS-22" (a mixture of alkane sulfonate and water) manufactured by Kuraray Co., Ltd. and a product "Cytex Silicon 53" (a mixture of an emulsion of silicon oil and water) manufactured by Kyogo Kagaku Kogyo Co., Ltd. Can be exemplified.
【００１２】「繊維間の摩擦を低減させる減摩剤」とし
ては、特に限定されないが、パラフィンワックス、脂肪
酸エステル等を例示でき、１種又は２種以上を使用でき
る。具体的には、エシロ化学工業社製の商品「固形ワッ
クス ＡＷ−２００」（パラフィンワックス、脂肪酸ト
リグリセリド（脂肪酸とグリセリンのエステル混合物）
及びノニオン活性剤の混合物）や、互応化学工業社の商
品「サイテックス Ｋ−３８０（サイジングワック
ス）」（脂肪酸トリグリセリド、ポリオキシエチレンア
ルキルエーテル及びノニオン活性剤の混合物）を例示で
きる。The "lubricant for reducing friction between fibers" is not particularly limited, and examples thereof include paraffin wax, fatty acid esters, and the like, and one or more kinds thereof can be used. Specifically, a product “solid wax AW-200” (paraffin wax, fatty acid triglyceride (ester mixture of fatty acid and glycerin) manufactured by Eshiro Chemical Industry Co., Ltd.)
And a mixture of nonionic activators) and a product of "Syotex K-380 (sizing wax)" (a mixture of fatty acid triglyceride, polyoxyethylene alkyl ether and nonionic activator) manufactured by Ryogo Chemical Industry Co., Ltd.
【００１３】繊維に帯電防止剤を付着させることによ
り、繊維の帯電を直接的に防止することができる。ま
た、繊維に減摩剤を付着させることにより、繊維間の摩
擦が低減して滑りが良くなり、繊維の帯電を間接的に防
止することができる。このようにして繊維の帯電が防止
されると、繊維同士の寄り集まりを防止でき、セメント
スラリー又はセメントミルク中で繊維を満遍なく分散さ
せ易くなる。By attaching an antistatic agent to the fibers, the charging of the fibers can be directly prevented. Further, by attaching a lubricant to the fibers, the friction between the fibers is reduced, the slip is improved, and the charging of the fibers can be indirectly prevented. When the charging of the fibers is prevented in this way, the fibers can be prevented from gathering together, and the fibers can be easily dispersed evenly in cement slurry or cement milk.
【００１４】「サイズ剤」は、特に限定されず、例えば
経糸糊又は仕上糊のいずれでもよく、澱粉、ポリビニー
ルアルコール（ＰＶＡ）、アクリル系サイズ剤等を例示
でき、１種又は２種以上を使用できる、好ましくはポリ
アクリル酸エステルである。The "sizing agent" is not particularly limited, and may be, for example, either a warp paste or a finishing paste, and examples thereof include starch, polyvinyl alcohol (PVA), and acrylic sizing agents. It is preferably a polyacrylate which can be used.
【００１５】本発明のセメント改質剤の製造方法は、特
に限定されず、例えば帯電防止剤及び／又は減摩剤を含
んだ繊維よりなる糸又は布を短い繊維に切断する方法で
もよいし、短い繊維に帯電防止剤及び／又は減摩剤を付
着させる方法でもよい。The method for producing the cement modifier of the present invention is not particularly limited, and may be, for example, a method of cutting a yarn or cloth made of fibers containing an antistatic agent and / or a lubricant into short fibers, A method of attaching an antistatic agent and / or a lubricant to the short fibers may be used.
【００１６】本発明のセメント改質剤が添加されるセメ
ントとしては、特に限定されないが、ポルトランドセメ
ント、ジェットセメント、高炉スラグセメント、フライ
アッシュセメント、アルミナセメント等を例示できる。
セメントに対する本発明のセメント改質剤の添加量は、
セメントスラリー１．０ｍ3 に対し０．２５〜１．０ｇ
程度が好ましく、０．４５〜０．６０ｇがさらに好まし
い。セメント改質剤は、打設直前に添加されることが好
ましい。The cement to which the cement modifier of the present invention is added is not particularly limited, and examples thereof include Portland cement, jet cement, blast furnace slag cement, fly ash cement, alumina cement and the like.
The amount of the cement modifier of the present invention added to the cement is
0.25 to 1.0 g for 1.0 m 3 of cement slurry
The degree is preferably, and more preferably 0.45 to 0.60 g. It is preferable that the cement modifier is added immediately before casting.
【００１７】[0017]
【実施例】次に、本発明をさらに具体的に説明するため
の実施例について説明する。セメント改質剤として、表
１に示す成分を付着した繊維長０．６〜１．０ｍｍのポ
リエステル繊維を製作した。実施例１は、減摩剤及びサ
イズ剤を付着したポリエステル繊維を、実施例２は、帯
電防止剤及びサイズ剤を付着したポリエステル繊維を、
実施例３は、帯電防止剤、減摩剤及びサイズ剤を付着し
たポリエステル繊維を、比較例１は、サイズ剤のみ付着
したポリエステル繊維を、それぞれセメント改質剤とし
て加える例である。また、比較例２として、ポリエステ
ル繊維をセメント改質剤として加えない例も行った。EXAMPLES Next, examples for explaining the present invention more specifically will be described. Polyester fibers having a fiber length of 0.6 to 1.0 mm to which the components shown in Table 1 were attached as cement modifiers were produced. Example 1 is a polyester fiber having a lubricant and a sizing agent attached thereto, and Example 2 is a polyester fiber having an antistatic agent and a sizing agent attached thereto.
Example 3 is an example in which a polyester fiber to which an antistatic agent, a lubricant, and a sizing agent are attached, and Comparative Example 1 is a polyester fiber to which only a sizing agent is attached, as a cement modifier. Further, as Comparative Example 2, an example in which polyester fiber was not added as a cement modifier was also performed.
【００１８】[0018]
【表１】 [Table 1]
【００１９】表１において、帯電防止剤は前述したクラ
レ社製の商品「ＡＳ−２２」であり、減摩剤は前述した
エシロ化学工業社製の商品「固形ワックス ＡＷ−２０
０」である。また、サイズ剤のＰＶＡ１は大日本インキ
化学工業社製の商品「１７タイプ」であり、ＰＶＡ２は
同社製の商品「０５タイプ」であり、アクリル樹脂は互
応化学工業社製の商品「Ｔ−７８０」である。In Table 1, the antistatic agent is "AS-22" manufactured by Kuraray Co., Ltd., and the lubricant is the "solid wax AW-20" manufactured by Eshiro Chemical Industry Co., Ltd.
0 ". PVA1 as a sizing agent is a product “17 type” manufactured by Dainippon Ink and Chemicals, PVA2 is a product “05 type” manufactured by Dainippon Ink and Chemicals, and an acrylic resin is a product “T-780” manufactured by Mutual Chemical Industry Co., Ltd. ".
【００２０】そして、実施例１〜３及び比較例１，２の
各セメント改質剤をセメントスラリーに入れて、下記の
各試験を行った。第一の試験場所は建材試験センター中
国試験所であり、セメントスラリーの配合は次の通りで
ある。 ポルトランドセメント ３００ｋｇ／ｍ3 細骨材（川砂） ８５５ｋｇ／ｍ3 水 １８１ｋｇ／ｍ3 第二の試験場所は出願人会社内であり、セメントスラリ
ーの配合は次の通りである。 ポルトランドセメント ３００ｋｇ／ｍ3 細骨材 ８３４ｋｇ／ｍ3 水 １９０ｋｇ／ｍ3 Each of the cement modifiers of Examples 1 to 3 and Comparative Examples 1 and 2 was put into a cement slurry, and the following tests were performed. The first test site is the Building Materials Testing Center China Laboratory, and the composition of the cement slurry is as follows. Portland cement 300 kg / m 3 fine aggregate (river sand) 855 kg / m 3 water 181 kg / m 3 The second test site is in the applicant company, and the composition of the cement slurry is as follows. Portland cement 300 kg / m 3 fine aggregate 834kg / m 3 water 190 kg / m 3
【００２１】［ブリージング試験］実施例１〜３はセメ
ントスラリー１．００ｍ3に対してセメント改質剤０．
６０ｇの割合で添加し、比較例１はセメントスラリー
１．００ｍ3に対してセメント改質剤０．７０ｇの割合
で添加して、各例を攪拌機で充分混合した後、内径２５
ｃｍ（建材試験センター中国試験所）及び２４ｃｍ（出
願人会社）のシリンダーに充填して開始し、５時間に亘
ってセメントスラリーの上面にしみ出した水の量を測定
した（開始から６０分までは１０分毎に測定し、その後
は３０分毎に測定した。）。５時間後において、比較例
２でしみ出した水の量を１００％として、実施例１〜３
でしみ出した水の量を％表示することとした（表２、表
３）。[Breathing test] In Examples 1 to 3, cement slurry was added to 1.00 m 3 of cement slurry at a concentration of 0.1%.
Comparative Example 1 was added at a rate of 0.70 g of a cement modifier to 1.00 m 3 of a cement slurry, and each example was sufficiently mixed with a stirrer.
cm (Building Materials Testing Center China Laboratory) and 24 cm (Applicant's company) cylinders were started and the amount of water seeping out of the top surface of the cement slurry was measured over 5 hours (from the start to 60 minutes) Was measured every 10 minutes and thereafter every 30 minutes.) After 5 hours, the amount of water exuded in Comparative Example 2 was set to 100%, and Examples 1 to 3 were used.
The amount of water that exuded was expressed in% (Tables 2 and 3).
【００２２】［硬化試験］セメントスラリーを型に注入
して室温で硬化させ、外径１０．０ｃｍ、高さ２０．０
ｃｍの試料を作成した。この試料を、標準養生では２０
±３℃の水中で、また自然養生では戸外放置で、いずれ
も所定日数養生した場合の圧縮強度及び曲げ強度（Ｎ／
ｍｍ2 ）を測定した。[Curing test] A cement slurry was poured into a mold and cured at room temperature, and had an outer diameter of 10.0 cm and a height of 20.0 cm.
cm samples were made. This sample was subjected to 20
Compressive strength and flexural strength (N / N) when cured in water at ± 3 ° C and left outdoors for natural curing for a specified number of days.
mm 2 ) was measured.
【００２３】［クラック試験］セメントスラリーを使用
してテストブロックを製作し、６ヶ月間及び１２ヶ月間
のクラック発生状況を調査した。[Crack Test] A test block was manufactured using a cement slurry, and the occurrence of cracks for 6 months and 12 months was examined.
【００２４】上記各試験の結果を表２、表３、表４及び
表５に示す。表２は平成１１年１１月２４日（開始日）
より建材試験センター中国試験所で行った結果であり、
表３は平成１１年１月１３日（開始日）より出願人会社
内で行った結果であり、表４及び表５は平成１１年７月
１４日（開始日）より出願人会社内で行った結果であ
る。The results of the above tests are shown in Tables 2, 3, 4 and 5. Table 2 is November 24, 1999 (start date)
The results were obtained from the China Testing Laboratory for Construction Materials Testing Center.
Table 3 shows the results obtained from the applicant company on January 13, 1999 (start date). Tables 4 and 5 show the results performed on the applicant company from July 14, 1999 (start date). It is a result.
【００２５】[0025]
【表２】 [Table 2]
【００２６】[0026]
【表３】 [Table 3]
【００２７】[0027]
【表４】 [Table 4]
【００２８】[0028]
【表５】 [Table 5]
【００２９】ブリージング試験では、表２〜表４に示す
ように、本発明のセメント改質剤を入れた実施例１〜３
の試料は、比較例２の試料よりも、ブリージング量が少
ない。In the breathing test, as shown in Tables 2 to 4, Examples 1 to 3 containing the cement modifier of the present invention were used.
The sample No. has a smaller amount of breathing than the sample of Comparative Example 2.
【００３０】硬化試験では、表２〜表４に示すように、
本発明のセメント改質剤を入れた実施例１〜３の試料の
強度は、比較例２の試料の強度に対して、初期強度を除
いて概ね上回った。 初期強度である材齢７日の強度 実施例１〜３の強度を比較例２の強度に対して表すと、
標準養生の圧縮強度は９３〜９９％であり、自然養生の
圧縮強度は８７〜９４％であった。また、標準養生の曲
げ強度は１００％であった（表２）。 強度の判定を行う材齢２８日強度 実施例１〜３の強度を比較例２の強度に対して表すと、
標準養生の圧縮強度は１０１〜１０４％であり、自然養
生の圧縮強度は１１１〜１１８％であった。標準養生の
曲げ強度は１０３％であった（表２）。 長期強度である材齢５６日の強度 実施例１〜３の強度を比較例２の強度に対して表すと、
標準養生の圧縮強度は１０２〜１０７％であり、自然養
生の圧縮強度は１０６〜１１３％であった。この結果を
まとめると、実施例１〜３は保水性が大きいため初期強
度（材齢７日）は若干遅れるが、材齢２１日以降につい
ては安定した強度が得られることが分かる。In the curing test, as shown in Tables 2 to 4,
The strengths of the samples of Examples 1 to 3 containing the cement modifier of the present invention were generally higher than the strength of the sample of Comparative Example 2, except for the initial strength. The strength of the 7-year-old material, which is the initial strength.
The compressive strength of the standard curing was 93 to 99%, and the compressive strength of the natural curing was 87 to 94%. The bending strength of the standard curing was 100% (Table 2). The 28-day-old strength for judging the strength When the strengths of Examples 1 to 3 are expressed with respect to the strength of Comparative Example 2,
The compressive strength of the standard curing was 101 to 104%, and the compressive strength of the natural curing was 111 to 118%. The bending strength of the standard curing was 103% (Table 2). 56-year-old strength, which is the long-term strength When the strengths of Examples 1 to 3 are expressed relative to the strength of Comparative Example 2,
The compressive strength of the standard curing was 102 to 107%, and the compressive strength of the natural curing was 106 to 113%. Summarizing the results, it can be seen that in Examples 1 to 3, the initial strength (age 7 days) is slightly delayed due to high water retention, but stable strength is obtained after 21 days.
【００３１】クラック試験では、表２〜表４に示すよう
に、本発明のセメント改質剤を入れた実施例１〜３の試
料を使用して施工したものは、比較例２の試料を使用し
て施工したものに比べて、クラックの発生が無かった。
そして、実施例１〜３のものは６ヶ月〜１２ヶ月を経過
した後もさらなるクラックの発生は認められなかった
が、比較例２のものは経時的にクラックが増大した。In the crack test, as shown in Tables 2 to 4, the samples of Examples 1 to 3 containing the cement modifier of the present invention were used, and the samples of Comparative Example 2 were used. Cracks were not generated as compared with the one constructed.
In Examples 1 to 3, no further cracks were observed even after 6 to 12 months, but in Comparative Example 2, cracks increased with time.
【００３２】表３に示すように、実施例１〜３を比較し
た結果、ブリージング試験及び圧縮試験においては実施
例３が一番良い結果が出た。そこで、実施例３につい
て、表５に示すように比較例１との比較試験を行った。As shown in Table 3, as a result of comparing Examples 1 to 3, in the breathing test and the compression test, Example 3 showed the best result. Therefore, a comparative test was performed on Example 3 with Comparative Example 1 as shown in Table 5.
【００３３】表５に示すように、ブリージング試験で
は、実施例３の試料は比較例１の試料よりもブリージン
グ量が少なかった。硬化試験では、次のような結果とな
った。 初期強度である材齢７日の強度 実施例３の強度を比較例１の強度に対して表すと、標準
養生の圧縮強度は９５％であり、自然養生の圧縮強度は
９４％であった。 強度の判定を行う材齢２８日強度 実施例３の強度を比較例１の強度に対して表すと、標準
養生の圧縮強度は１０２％であり、自然養生の圧縮強度
は１０７％であった。この結果をまとめると、実施例３
は比較例１よりも保水性が大きいため初期強度（材齢７
日）は若干遅れるが、材齢２８日については安定した強
度が得られることが分かる。クラック試験では、実施例
３及び比較例１ともにクラック発生は無かった。以上の
通り、実施例３と比較例１とを比較した結果、ブリージ
ング試験及び圧縮試験においては、実施例３の方が良い
結果が出た。As shown in Table 5, in the breathing test, the sample of Example 3 had a smaller amount of breathing than the sample of Comparative Example 1. In the curing test, the following results were obtained. Strength at 7 days of age, which is the initial strength. When the strength of Example 3 is expressed relative to the strength of Comparative Example 1, the compressive strength of standard curing was 95%, and the compressive strength of natural curing was 94%. Strength at 28 days of age for judging strength When the strength of Example 3 was expressed relative to the strength of Comparative Example 1, the compressive strength of standard curing was 102%, and the compressive strength of natural curing was 107%. The results are summarized in Example 3.
Has an initial strength (age 7)
(Day) is slightly delayed, but it can be seen that a stable strength can be obtained for a material age of 28 days. In the crack test, no crack occurred in both Example 3 and Comparative Example 1. As described above, as a result of comparing Example 3 with Comparative Example 1, in the breathing test and the compression test, Example 3 had better results.
【００３４】以上のように本発明のセメント改質剤は、
繊維が帯電防止剤又は減摩剤を含んでいるので、セメン
トスラリー又はセメントミルク中に満遍なく均一に分散
させることができ、極めて少量の添加で、セメントスラ
リーやセメントミルクのブリージング防止効果、セメン
トの強度向上効果、セメントのクラック防止効果を十分
に発揮する。しかも、セメント硬化物の表面は平滑で光
沢を帯びるようになる。As described above, the cement modifier of the present invention
Since the fiber contains an antistatic agent or a lubricant, it can be evenly and uniformly dispersed in cement slurry or cement milk. The effect of improvement and the effect of preventing cracking of cement are fully exhibited. In addition, the surface of the cured cement becomes smooth and glossy.
【００３５】なお、本発明は前記実施形態の構成に限定
されず、発明の趣旨から逸脱しない範囲で適宜変更して
具体化することもできる。Note that the present invention is not limited to the configuration of the above-described embodiment, and can be embodied by appropriately changing it without departing from the spirit of the invention.
【００３６】[0036]
【発明の効果】以上詳述したように、請求項１〜５の発
明に係るセメント改質剤によれば、セメントスラリー又
はセメントミルク中に満遍なく均一に分散させることが
でき、もってセメント改質効果を十分に発揮させること
ができるという優れた効果を奏する。As described in detail above, the cement modifier according to the first to fifth aspects of the present invention can be evenly and uniformly dispersed in a cement slurry or a cement milk, thereby improving the cement modifying effect. Can be sufficiently exerted.
Claims (12)
る減摩剤の少なくとも一方を含んだ繊維長１．０ｍｍ以
下の合成繊維からなるセメント改質剤。1. A cement modifier comprising a synthetic fiber having a fiber length of 1.0 mm or less containing at least one of an antistatic agent and a lubricant for reducing friction between fibers.
１．０ｍ3 当たり０．２５〜１．０ｇ添加するセメント
改質剤であって、帯電防止剤又は繊維間の摩擦を低減さ
せる減摩剤の少なくとも一方を含んだ繊維長１．０ｍｍ
以下の合成繊維からなるセメント改質剤。2. A cement modifier added to cement slurry or cement milk in an amount of 0.25 to 1.0 g per 1.0 m 3 , wherein at least one of an antistatic agent and a friction reducing agent for reducing friction between fibers. Fiber length 1.0mm including
A cement modifier comprising the following synthetic fibers.
る減摩剤の少なくとも一方を含んだ繊維長１．０ｍｍ以
下の合成繊維からなるセメント改質剤を、セメントスラ
リー又はセメントミルクに１．０ｍ3 当たり０．２５〜
１．０ｇ添加するセメント改質方法。3. A cement slurry comprising a synthetic fiber having a fiber length of 1.0 mm or less and containing at least one of an antistatic agent and a lubricant for reducing friction between fibers is added to cement slurry or cement milk. 0m 3 per 0.25
A cement modification method in which 1.0 g is added.
る減摩剤の少なくとも一方を含んだ繊維長１．０ｍｍ以
下の合成繊維からなるセメント改質剤を１．０ｍ3 当た
り０．２５〜１．０ｇ添加したセメントスラリー又はセ
メントミルクが硬化してなる改質セメント硬化物。4. A cement modifier comprising a synthetic fiber having a fiber length of 1.0 mm or less containing at least one of an antistatic agent and a lubricant for reducing friction between fibers is added in an amount of 0.25 to 1.05 m 3 . Modified cement hardened material obtained by hardening 1.0 g of cement slurry or cement milk.
る請求項１又は２記載のセメント改質剤。5. The cement modifier according to claim 1, wherein the fibers have sizing agents attached thereto.
る請求項３記載のセメント改質方法。6. The method for modifying cement according to claim 3, wherein the fibers have sizing agents attached thereto.
る請求項４記載の改質セメント硬化物。7. The modified cement cured product according to claim 4, wherein the fibers have a sizing agent attached thereto.
項１又は２記載のセメント改質剤。8. The cement modifier according to claim 1, wherein the fibers are polyester fibers.
項３記載のセメント改質方法。9. The method according to claim 3, wherein the fibers are polyester fibers.
求項４記載の改質セメント硬化物。10. The modified cement cured product according to claim 4, wherein said fibers are polyester fibers.
リー又はセメントミルクの打設直前に添加する請求項３
記載のセメント改質方法。11. The method according to claim 3, wherein the cement modifier is added immediately before the cement slurry or the cement milk is poured.
The method for modifying cement according to the above.
リー又はセメントミルクの打設直前に添加する請求項４
記載の改質セメント硬化物。12. The method according to claim 4, wherein the cement modifier is added immediately before the cement slurry or the cement milk is poured.
The cured product of the modified cement according to the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000100129A JP3270443B2 (en) | 2000-03-31 | 2000-03-31 | Cement modifier, cement modification method and modified cement hardened material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000100129A JP3270443B2 (en) | 2000-03-31 | 2000-03-31 | Cement modifier, cement modification method and modified cement hardened material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001287975A JP2001287975A (en) | 2001-10-16 |
| JP3270443B2 true JP3270443B2 (en) | 2002-04-02 |
Family
ID=18614377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000100129A Expired - Fee Related JP3270443B2 (en) | 2000-03-31 | 2000-03-31 | Cement modifier, cement modification method and modified cement hardened material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3270443B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5275906B2 (en) * | 2009-05-29 | 2013-08-28 | 帝人株式会社 | Fiber for reinforcing cement molding |
| JP6745227B2 (en) * | 2017-01-25 | 2020-08-26 | 住友林業株式会社 | Fiber for cement material reinforcement |
| JP6791804B2 (en) * | 2016-12-22 | 2020-11-25 | 住友林業株式会社 | Fiber for reinforcing cement material |
| JP7348643B2 (en) * | 2019-12-09 | 2023-09-21 | ワーク・ファイン株式会社 | Fresh concrete fluidizer |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5322196B2 (en) * | 1975-02-22 | 1978-07-07 | ||
| JPS5669245A (en) * | 1979-11-07 | 1981-06-10 | Fuji Fiber Glass Kk | Product of cut glass filament |
| JPS6418950A (en) * | 1987-07-10 | 1989-01-23 | Dainippon Ink & Chemicals | Carbon fiber reinforced inorganic product |
| DK695688D0 (en) * | 1988-12-14 | 1988-12-14 | Danaklon As | FIBERS AND MATERIALS CONTAINING THE SAME |
| JP2752871B2 (en) * | 1992-11-27 | 1998-05-18 | 株式会社ペトカ | Carbon fiber and cement composite for cement reinforcement |
-
2000
- 2000-03-31 JP JP2000100129A patent/JP3270443B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001287975A (en) | 2001-10-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1263690B1 (en) | Fire-resistant high performance concrete composition | |
| RU2036886C1 (en) | Method for preparation of mixture for production of composite material products from composite materials | |
| US5753368A (en) | Fibers having enhanced concrete bonding strength | |
| JP2014139136A (en) | Novel concrete mixture and cement mixture | |
| WO2023164987A1 (en) | Dual-scale toughened cement-based composite material and use thereof | |
| JP2825742B2 (en) | Manufacturing method of cement structural unit without bag hole | |
| EP0271825A2 (en) | Hydraulic cementitious compositions reinforced with fibers containing polymerized polyacrylonitrile | |
| JP3270443B2 (en) | Cement modifier, cement modification method and modified cement hardened material | |
| Luan et al. | Experimental study on mortar with the addition of hydrophobic silicone oil for water absorption, strength, and shrinkage | |
| GB2293821A (en) | Admixtures for slip forming of concrete | |
| CN112521081A (en) | Building reinforced high-ductility concrete and preparation and construction method thereof | |
| JP4451083B2 (en) | Mortar manufacturing method | |
| JPH09249442A (en) | Premix mortar and mortar product | |
| CN110510948A (en) | A kind of high performance lightweight aggregate concrete and preparation method thereof | |
| JP3470240B2 (en) | Polymer dispersion for polymer cement mortar composition, and polymer cement mortar composition | |
| US7993448B2 (en) | Cement-containing composition for use with alkali-resistant fiberglass and poles made therefrom | |
| JPS58120554A (en) | Cement group self-levelling floor material | |
| JPH0421556A (en) | Fiber-reinforced cement mortar and concrete composition | |
| JP6959000B2 (en) | Cement composition | |
| JP2004189512A (en) | Composition of mortar | |
| JPH10167792A (en) | Fiber-reinforced cement composition and production of cement cured product | |
| JP3797058B2 (en) | Cement joint material | |
| JPH0517184B2 (en) | ||
| JP4827188B2 (en) | Base material | |
| JPS6096554A (en) | Manufacture of cementitious composite body |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090118 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090118 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100118 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100118 Year of fee payment: 8 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313113 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100118 Year of fee payment: 8 |
|
| R360 | Written notification for declining of transfer of rights |
Free format text: JAPANESE INTERMEDIATE CODE: R360 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100118 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100118 Year of fee payment: 8 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110118 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120118 Year of fee payment: 10 |
|
| LAPS | Cancellation because of no payment of annual fees |