JP2934886B2 - Carbon fiber for cement reinforcement - Google Patents
Carbon fiber for cement reinforcementInfo
- Publication number
- JP2934886B2 JP2934886B2 JP1286443A JP28644389A JP2934886B2 JP 2934886 B2 JP2934886 B2 JP 2934886B2 JP 1286443 A JP1286443 A JP 1286443A JP 28644389 A JP28644389 A JP 28644389A JP 2934886 B2 JP2934886 B2 JP 2934886B2
- Authority
- JP
- Japan
- Prior art keywords
- carbon fiber
- cement
- fiber
- coupling agent
- cement reinforcement
- 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 - Lifetime
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、炭素繊維とセメントの均一な配合性と付着
力に優れ、セメント系複合材にした時に強度発現性の良
好な炭素繊維を提供するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention provides a carbon fiber which is excellent in uniform compoundability and adhesion of carbon fiber and cement, and has good strength development when made into a cement-based composite material. Is what you do.
従来セメント類の水硬性粉体を用いた混練物は各種の
建築材料、土木材料に広く用いられている。このような
混練物を補強し、亀裂発生を防止するため、繊維材料を
配合することも行われてきた。しかし補強繊維として石
綿を用いることは、発癌性の点から好ましくなく、また
ガラス繊維は耐アルカリ性が劣つているため、セメント
中でガラス繊維自体の強度が劣化するという欠点を持つ
ている。このため各種の有機繊維或いは耐アルカリガラ
ス等が強化材として検討されているが、有機繊維では耐
火性の点に問題があり、耐アルカリガラスに用いても、
セメント等のアルカリ性環境下では、長期間使用すると
強度が低下するという問題がある。そこで耐熱性、耐薬
品性に優れた炭素繊維が注目されている。ところが炭素
繊維をセメントに添加混合すると均一に分散しにくく、
さらに均一な分散を得るため強度に撹拌を行うと、繊維
の切断が起つたり、フアイバーボールと呼ばれる繊維の
毛羽だまりができてしまい、補強材として充分な効果を
発揮し得なかつた。Conventionally, kneaded products using hydraulic powders of cements have been widely used for various building materials and civil engineering materials. In order to reinforce such a kneaded material and to prevent the occurrence of cracks, a fiber material has been blended. However, the use of asbestos as a reinforcing fiber is not preferable from the viewpoint of carcinogenicity, and has the disadvantage that the strength of the glass fiber itself is deteriorated in cement because the glass fiber has poor alkali resistance. For this reason, various types of organic fibers or alkali-resistant glass have been studied as a reinforcing material.
In an alkaline environment such as cement, there is a problem that the strength is reduced when used for a long time. Therefore, carbon fibers having excellent heat resistance and chemical resistance have attracted attention. However, when carbon fiber is added to and mixed with cement, it is difficult to disperse it uniformly,
If the stirring is carried out with high strength to obtain a more uniform dispersion, the fibers may be cut or the fiber balls called fiber balls may be formed, and a sufficient effect as a reinforcing material cannot be obtained.
この問題を解決するため、繊維補強材に界面活性剤を
付着させる方法（特開昭60−96554号）、炭素繊維をス
ルホン化処理する方法（特開昭60−137860号）、セメン
トに減水剤を混入する方法（特開昭61−236646号）、炭
素繊維にラテツクスコーテイングを行う方法（特開昭62
−108755号）、アルカリ金属またはアルカリ土金属の塩
化物を混入する方法（特開平１−141852号）、硫酸また
はチオ硫酸塩を混入させる方法（特開平１−141853号）
等が提案されている。In order to solve this problem, a method of attaching a surfactant to a fiber reinforcing material (Japanese Patent Application Laid-Open No. 60-96554), a method of sulfonating carbon fibers (Japanese Patent Application Laid-Open No. 60-137860), (Japanese Patent Application Laid-Open No. Sho 61-236646) and a method of performing latex coating on carbon fiber (Japanese Patent Application Laid-Open No. Sho 62-236646).
-108755), a method of mixing an alkali metal or alkaline earth metal chloride (JP-A-1-141852), and a method of mixing sulfuric acid or thiosulfate (JP-A-1-141853)
Etc. have been proposed.
しかし、炭素繊維のスルホン化処理は処理に長時間に
要し、また炭素繊維と各種の化合物を付着させる方法ま
たはセメントに化合物を混入させる方法は炭素繊維とそ
の化合物が反応しないので付着力の改善性に劣るという
問題点があつた。However, the sulfonation treatment of carbon fiber takes a long time, and the method of adhering various compounds to carbon fiber or the method of mixing the compound into cement improves the adhesion because the carbon fiber and the compound do not react. There was a problem that it was inferior.
そこで本発明は上記従来の問題点に鑑み、炭素繊維と
セメントの均一な分散性及び炭素繊維とセメントの付着
力を効率的にしかも効果的に解決した炭素繊維を提供す
るものである。Accordingly, the present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a carbon fiber in which the uniform dispersibility of carbon fiber and cement and the adhesive force between carbon fiber and cement are efficiently and effectively solved.
即ち、本発明の要旨は炭素繊維をアミノシランカツプ
リング剤処理したセメント用炭素繊維である。That is, the gist of the present invention is a carbon fiber for cement obtained by treating a carbon fiber with an aminosilane coupling agent.
本発明の炭素繊維は、ポリアクリルニトリル（以下PA
Nと略記）またはピツチを主成分とするプレカーサーを
焼成してなる弾性率3t/mm2以上、強度50kg/mm2以上の炭
素繊維であり、好ましくは弾性率20t/mm2以上、強度100
kg/mm2以上の炭素繊維である。The carbon fiber of the present invention is made of polyacrylonitrile (hereinafter PA).
N) or a carbon fiber having a modulus of elasticity of 3 t / mm 2 or more and a strength of 50 kg / mm 2 or more, and preferably a modulus of elasticity of 20 t / mm 2 or more and a strength of 100
kg / mm 2 or more carbon fiber.
本発明のアミノシランカツプリング剤は下記の一般式
（１）であらわされるものである。The aminosilane coupling agent of the present invention is represented by the following general formula (1).
YRSiX3 ……（１） ここでＸは、ケイ素原子に結合している加水分解基で
あり、Cl,OCH3,OC2H5,OC2H4OCH3,OCOCH3,N（CH3）２等
である。YRSiX 3 ... (1) Here, X is a hydrolyzable group bonded to a silicon atom, and is Cl, OCH 3 , OC 2 H 5 , OC 2 H 4 OCH 3 , OCOCH 3 , N (CH 3 ) Second magnitude.
ここでYRは、NH2C3H6,NH2C2H4NHC3H6,NH2CONHC3H6等
である。Here, YR is NH 2 C 3 H 6 , NH 2 C 2 H 4 NHC 3 H 6 , NH 2 CONHC 3 H 6 or the like.
一般式（１）で示される化合物の例としては、γ−ア
ミノプロピルトリメトキシシラン、Ｎ−β−（アミノエ
チル）−γ−アミノプロピルトリエトキシシラン、γ−
ユレイドプロピルトリエトキシシラン等を挙げることが
できる。Examples of the compound represented by the general formula (1) include γ-aminopropyltrimethoxysilane, N-β- (aminoethyl) -γ-aminopropyltriethoxysilane, and γ-aminopropyltrimethoxysilane.
Eureidopropyltriethoxysilane and the like can be mentioned.
アミノシランカツプリング剤は、炭素繊維表面の水酸
基と反応して炭素繊維と強固な結合をし且つアミノ基に
よりセメントとの接着力を強固なものにし、しかもアミ
ノシランカツプリング剤が水溶性であれば、炭素繊維と
セメントの分散性を改良する働きがある。The aminosilane coupling agent reacts with the hydroxyl group on the carbon fiber surface to form a strong bond with the carbon fiber and to strengthen the adhesive force with the cement by the amino group, and if the aminosilane coupling agent is water-soluble, It works to improve the dispersibility of carbon fiber and cement.
また炭素繊維にアミノシランカツプリング剤処理した
後界面活性剤を塗布しても良い。A surfactant may be applied to the carbon fiber after the aminosilane coupling agent treatment.
界面活性剤は、セメント系スラリーに空気を連行しセ
メントのワーカビリテイを増加させるAE剤（air−entra
ining admixture）に用いられるアルキルベンゼンスル
ホン酸塩、アルキルスルホン酸トリエタール等、または
セメント粒子を水中に分散させやすくする分散剤（減水
剤）に用いられるリグニンスルホン酸塩、オキシカルボ
ン酸塩、アルキルアリルスルホン酸塩、高級アルコー
ル、アルキルベンゼンスルホン酸ソーダ系のものをい
う。The surfactant is an AE agent (air-entra) which entrains air into the cement slurry and increases the workability of the cement.
alkyl benzene sulfonate, alkyl sulfonic acid trietal, etc. used for ining admixture, or lignin sulfonate, oxycarboxylate, alkyl allyl sulfonic acid used as a dispersant (water reducing agent) for easily dispersing cement particles in water Salts, higher alcohols, and sodium alkylbenzene sulfonates.
酸化処理を行つていない炭素繊維表面には、通常、水
酸基が少ないが、炭素繊維の焼成の方法によつては（例
えば、焼成温度を低くして製造する方法）、水酸基が多
くついた炭素繊維を製造することができる。しかしPAN
系炭素繊維は通常1000℃以上の温度で焼成されるので炭
素繊維の表面の水酸基は少なく、酸化処理を行つて表面
に酸素官能基を導入する方がシランカツプリング剤と反
応しやすい。The surface of the carbon fiber that has not been oxidized usually has few hydroxyl groups. However, depending on the method of firing the carbon fiber (for example, a method of manufacturing by lowering the firing temperature), the carbon fiber having a large number of hydroxyl groups may be used. Fiber can be manufactured. But PAN
Since the base carbon fiber is usually fired at a temperature of 1000 ° C. or higher, the hydroxyl group on the surface of the carbon fiber is small, and it is easier to react with the silane coupling agent by introducing an oxygen functional group into the surface by performing an oxidation treatment.
炭素繊維の酸化処理は、樹脂をマトリツクスとする複
合材に使用される炭素繊維に一般的に行われている空気
酸化処理方法、オゾン酸化処理方法、電解酸化処理方法
などで行うことができる。The oxidation treatment of the carbon fiber can be performed by an air oxidation treatment method, an ozone oxidation treatment method, an electrolytic oxidation treatment method, etc., which are generally performed on carbon fibers used for a composite material using a matrix as a resin.
アミノシランカップリング剤は、炭素繊維表面と反応
させるため、好ましくは0.1〜10wt％付着させるのが良
い。さらに好ましくは0.5〜5wt％付着させるのが良い。The aminosilane coupling agent is preferably attached at 0.1 to 10% by weight in order to react with the carbon fiber surface. More preferably, 0.5 to 5 wt% is deposited.
本発明の炭素繊維が対象とするセメントは、ポルトラ
ンドセメント、白色ポルトランドセメント、アルミナセ
メント等の水硬性セメントである。The cement targeted by the carbon fiber of the present invention is a hydraulic cement such as Portland cement, white Portland cement, and alumina cement.
以下本発明を実施例により具体的に説明する。 Hereinafter, the present invention will be described specifically with reference to Examples.
実施例１ 引張り強度350kg/mm2、引張り弾性率24t/mm2のノンサ
イズの炭素繊維をγ−ユレイドプロピルトリエトキシシ
ラン１％水溶液に浸漬した。その後150℃、５分間で加
熱処理した。Example 1 A non-sized carbon fiber having a tensile strength of 350 kg / mm 2 and a tensile elasticity of 24 t / mm 2 was immersed in a 1% aqueous solution of γ-ureidopropyltriethoxysilane. Thereafter, heat treatment was performed at 150 ° C. for 5 minutes.
この炭素繊維を6mmの長さにカツトし、水／セメント
／メチルセルロース100/50/0.5重量比の混練物に加え混
合した。この混合物を30×30cmの型枠に流込み、成形し
た。養生は水中20℃１日、水中50℃２日行つた。このサ
ンプルを×15cmに切断して曲げ試験を行つた。曲げ強度
は175kg/cm2であつた。This carbon fiber was cut into a length of 6 mm, and added to and mixed with a kneaded product in a water / cement / methylcellulose 100/50 / 0.5 weight ratio. The mixture was poured into a 30 × 30 cm mold and molded. Curing was carried out in water at 20 ° C for 1 day and in water at 50 ° C for 2 days. This sample was cut into a size of 15 cm and subjected to a bending test. The bending strength was 175 kg / cm 2 .
実施例２ 表１に示す条件以外は、実施例１と同様の条件で成形
したときの物性を表１に示す。Example 2 Table 1 shows the physical properties when molded under the same conditions as in Example 1 except for the conditions shown in Table 1.
〔効果〕 本発明は、炭素繊維を適正に処理することによつてセ
メントに配合したとき成形体の曲げ強度を大巾に向上せ
しめるものであり、壁材、石綿セメント代替材料、構造
材料等の建築材料、土木材料として優れた性能を発揮す
る。 [Effect] The present invention is intended to greatly improve the bending strength of a molded article when compounded with cement by appropriately treating carbon fiber, and is used for wall materials, asbestos cement substitute materials, structural materials, and the like. Demonstrates excellent performance as building materials and civil engineering materials.
Claims (3)
理したセメント強化用炭素繊維1. A carbon fiber for cement reinforcement in which a carbon fiber is treated with an aminosilane coupling agent.
る請求項１記載の炭素繊維2. The carbon fiber according to claim 1, wherein the aminosilane coupling agent is water-soluble.
維である請求項１記載の炭素繊維3. The carbon fiber according to claim 1, wherein the carbon fiber to be treated is an oxidized carbon fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1286443A JP2934886B2 (en) | 1989-11-02 | 1989-11-02 | Carbon fiber for cement reinforcement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1286443A JP2934886B2 (en) | 1989-11-02 | 1989-11-02 | Carbon fiber for cement reinforcement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03150242A JPH03150242A (en) | 1991-06-26 |
| JP2934886B2 true JP2934886B2 (en) | 1999-08-16 |
Family
ID=17704457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1286443A Expired - Lifetime JP2934886B2 (en) | 1989-11-02 | 1989-11-02 | Carbon fiber for cement reinforcement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2934886B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201514352A (en) * | 2013-08-29 | 2015-04-16 | Dow Corning | Coated fibre and concrete composition comprising the same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6385174A (en) * | 1986-09-22 | 1988-04-15 | 株式会社島津製作所 | Production of reinforcing fiber |
| JPS63195156A (en) * | 1987-02-06 | 1988-08-12 | 恒和化学工業株式会社 | Manufacture of high strength cement set body |
-
1989
- 1989-11-02 JP JP1286443A patent/JP2934886B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03150242A (en) | 1991-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Majumdar | Glass fibre reinforced cement and gypsum products | |
| US6172147B1 (en) | Additive for production of highly workable mortar cement | |
| EP0220073A1 (en) | Cementitious compositions and products | |
| JP2816433B2 (en) | Carbon fiber for cement | |
| US5062897A (en) | Carbon fiber-reinforced hydraulic composite material | |
| CN110922149A (en) | High-toughness high-strength gypsum product and preparation method thereof | |
| JP2009084092A (en) | Mortar-based restoring material | |
| JP2934886B2 (en) | Carbon fiber for cement reinforcement | |
| CN111187021B (en) | Fiber anticorrosion modification process, anticorrosion modified fiber and mildew-proof algae-proof concrete | |
| JPS585861B2 (en) | It's important to know what's going on. | |
| JPH10167792A (en) | Fiber-reinforced cement composition and production of cement cured product | |
| US7993448B2 (en) | Cement-containing composition for use with alkali-resistant fiberglass and poles made therefrom | |
| JP2660143B2 (en) | Carbon fiber and cement composite for cement reinforcement | |
| JPH06127992A (en) | Cement composition for extrusion molded article | |
| JPH0421556A (en) | Fiber-reinforced cement mortar and concrete composition | |
| JPH06122539A (en) | Cement admixture and its production | |
| JPH0465338A (en) | Production of carbon fiber reinforced concrete or similar composition | |
| KR900005975B1 (en) | Method for producing kaolin-bricks | |
| JPS6096554A (en) | Manufacture of cementitious composite body | |
| JP3936014B2 (en) | Carbon fiber bundle for cement reinforcement | |
| JPH03285858A (en) | Cement composition for spraying application | |
| JP2002012465A (en) | Extrusion compact and its manufacturing method | |
| JP3240195B2 (en) | Fiber reinforced cement mortar and fiber reinforced concrete composition | |
| JP2874232B2 (en) | Lightweight cement molding | |
| JPH09136314A (en) | Manufacture of fiber reinforced cement molding |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080604 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090604 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100604 Year of fee payment: 11 |
|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100604 Year of fee payment: 11 |