JPH0568419B2 - - Google Patents
Info
- Publication number
- JPH0568419B2 JPH0568419B2 JP6956786A JP6956786A JPH0568419B2 JP H0568419 B2 JPH0568419 B2 JP H0568419B2 JP 6956786 A JP6956786 A JP 6956786A JP 6956786 A JP6956786 A JP 6956786A JP H0568419 B2 JPH0568419 B2 JP H0568419B2
- Authority
- JP
- Japan
- Prior art keywords
- fine powder
- inorganic fine
- hydraulic inorganic
- concrete
- carbon fibers
- 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
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 52
- 239000004917 carbon fiber Substances 0.000 claims description 52
- 239000000843 powder Substances 0.000 claims description 43
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 26
- 239000012779 reinforcing material Substances 0.000 claims description 23
- 239000004570 mortar (masonry) Substances 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 8
- 230000002787 reinforcement Effects 0.000 claims description 8
- 239000004568 cement Substances 0.000 claims description 5
- 239000011398 Portland cement Substances 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 239000011400 blast furnace cement Substances 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 230000003014 reinforcing effect Effects 0.000 description 19
- 238000005452 bending Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 150000004677 hydrates Chemical class 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000000635 electron micrograph Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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
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)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Description
〔産業上の利用分野〕
この発明は、炭素繊維と水硬性無機微粉体の水
和物とを含むモルタルまたはコンクリート用補強
材に関する。
〔従来の技術〕
従来の、モルタルまたはコンクリート用補強材
としては鉄筋（鉄筋、金網ラス、エキスパンドメ
タル等の、ステンレス鋼を含む鋼材をいう。以下
同じ。）が広く使用され、鉄筋が配置された領域
にコンクリートを打設しこれが硬化することによ
り、コンクリートが鉄筋外周に付着して両者が一
体化されて、コンクリートの補強がなされてい
る。また、特開昭59−103713号公報に記載される
ように、炭素繊維を枠状に形成してこれをコンク
リート製品の補強材として用いることも知られて
いる。
〔発明が解決しようとする問題点〕
しかしながら、前記鉄筋にあつては、材質が鉄
であるために錆の発生が問題になる場合がある。
即ち、コンクリートの打設前に鉄筋に錆が発生し
ていると、打設したコンクリートと鉄筋との結合
が不完全になつて、コンクリートへの補強効果が
減退することにより、またコンクリートの硬化後
にコンクリートに発した割れ目等から水が浸入し
たり、中性化や塩害等により鉄筋に錆が発生する
と、結合している鉄筋とコンクリートとが離れ
て、この場合にもコンクリートへの補強効果が減
退するという問題点がある。
また、鉄とコンクリートとは相互の接着力が必
ずしも充分ではなかつたために、両者を充分に結
合させる目的で鉄筋の外周に凹凸を形成して、両
者の接着面積を増大させたり、物理的にかみ合わ
せる手段をとるのが一般的である。さらに、前記
鉄筋は重量が大であるために、その取扱いが不便
であり且つ鉄筋で補強された薄肉のコンクリート
成形体の場合では重量増加をもたらす等の問題点
もある。
また前記公開公報記載の枠状をした炭素繊維は
それ自体が補強材をなすものであるから、これを
コンクリート打設領域に予め配置する等の現場作
業においては、炭素繊維が露出した状態にある。
このため、その破損や切断を招くおそれがあり、
またコンクリート打設の衝撃や骨材の押圧力によ
つて炭素繊維の曲げや切断のおそれがあるため、
現場作業に困難が伴うという問題点がある。
この発明は、このような従来技術の問題点に着
目してなされたものであり、コンクリートとの親
和性が高くてコンクリートに対して強固に結合で
き、しかも耐腐食性や耐久性が高く、不燃性で、
高温でも耐力の低下が少なく且つ軽量であり、さ
らに強度も高いコンクリート補強材を得ることを
目的としている。
〔問題点を解決するための手段〕
この発明のモルタルまたはコンクリート用補強
材は、炭素繊維と水硬性無機微粉体の水和物とを
含み、前記炭素繊維は連続繊維であり含有量が全
体に対する体積比で５〜30％であつて、これらが
一次元配向且つ分散されてなり、また使用する水
硬性無機微粉体の平均粒径は炭素繊維の直径以下
であり、各炭素繊維がその間に介在される前記水
硬性無機微粉体の水和物により結合され、且つ表
面に前記水硬性無機微粉体の水和物の一部又は全
部が露出されてなる。
〔作用〕
炭素繊維は、組成体に体積比５％から30％まで
含まれていてその上限値が高いため、多量の炭素
繊維を含むことが可能であるから、このコンクリ
ート補強材は強度が増大する。５％未満の場合
は、水硬無機微粉体の硬化体を乾燥収縮が通常の
ものより大きく、この収縮を拘束しきれないため
硬化体内部にひびわれ等を生じ易く、期待する効
果が発揮されない。また使用する水硬性無機微粉
体の平均粒径が炭素繊維の直径以下であるから、
含浸製造時に水硬性無機微粉体が各炭素繊維間に
充分に回り込み、この水硬性無機微粉体の水和物
が各炭素繊維間を確実に連結することになる。こ
のことは一次元配向された炭素繊維間に水硬性無
機微粉体の水和物が均一に分散されるため、強化
材である炭素繊維の特性を充分に生かすことがで
きる。この意味からもこのコンクリート補強材の
強度が増大し、且つ粒径の大きい水硬性無機微粉
体を使用した時に生ずる水硬性無機微粉体による
炭素繊維自体の屈曲及び切断を防止する。なお、
水硬性微粉体は、ポルトランドセメント、アルミ
ナセメント、耐硫酸塩セメント、高炉セメントま
たはこれらと潜在水硬性を有する超微粒子シリカ
との混合物の微粉体またはこれらを主成分とする
微粉体である。また、高体積比で炭素繊維を一次
元配向しても、炭素繊維の微視的な直線性と繊維
１本１本の分散性が確保される。
さらにこの発明は、水硬性無機微粉体水和物が
コンクリート補強材の表面にも露出しているた
め、打設されたコンクリートとの親和性に富み、
補強体と打設コンクリートとの結合が強固になさ
れる。このため、コンクリートの補強効果は顕著
になる同時に、補強体の主成分が炭素繊維とこれ
を結合するセメント水和物であるため耐久性に富
むことから、コンクリートと補強材との間の結合
が脆弱になることはない。なお、この発明の補強
材とコンクリートとが強固に結合されることの前
記作用は、この発明の補強材の表面に凹凸を形成
してその結合力をさらに強固にすることを妨げる
ものではない。
以下に本発明のコンクリート補強材について表
−１のような成分と配合例を挙げて説明する。表
のような成分と配合の配合物を基礎としており、
これが充分水和し硬化した状態にある。
[Industrial Application Field] The present invention relates to a reinforcing material for mortar or concrete containing carbon fibers and a hydrate of hydraulic inorganic fine powder. [Prior art] Reinforcing bars (referring to steel materials including stainless steel, such as reinforcing bars, wire mesh lath, and expanded metal; the same shall apply hereinafter) have been widely used as reinforcing materials for mortar or concrete in the past. By pouring concrete into the area and hardening it, the concrete adheres to the outer periphery of the reinforcing bars, integrating the two and reinforcing the concrete. It is also known to form carbon fiber into a frame shape and use it as a reinforcing material for concrete products, as described in Japanese Patent Application Laid-open No. 59-103713. [Problems to be Solved by the Invention] However, since the reinforcing bars are made of iron, the occurrence of rust may become a problem.
In other words, if rust occurs on the reinforcing bars before concrete is poured, the bond between the cast concrete and the reinforcing bars will be incomplete, reducing the reinforcing effect on the concrete, and causing corrosion after the concrete hardens. If water enters through cracks in the concrete, or rust occurs on the reinforcing bars due to carbonation or salt damage, the bonded reinforcing bars will separate from the concrete, and in this case, the effectiveness of reinforcing the concrete will also decrease. There is a problem with that. In addition, since the adhesive strength between steel and concrete was not necessarily sufficient, in order to bond the two sufficiently, unevenness was formed on the outer periphery of the reinforcing bars to increase the bonding area between the two, and to physically engage them. It is common to take measures such as Furthermore, since the reinforcing bars are heavy, they are inconvenient to handle, and in the case of thin concrete molded bodies reinforced with reinforcing bars, there are problems such as an increase in weight. Furthermore, since the frame-shaped carbon fiber described in the above-mentioned publication is itself a reinforcing material, the carbon fiber is exposed during on-site work such as placing it in advance in the concrete pouring area. .
This may result in damage or disconnection.
In addition, there is a risk of bending or breaking carbon fibers due to the impact of concrete pouring or the pressing force of aggregate.
There is a problem in that field work is difficult. This invention was made by focusing on the problems of the prior art, and it has a high affinity with concrete and can be firmly bonded to concrete, is highly corrosion resistant and durable, and is nonflammable. By sex,
The objective is to obtain a concrete reinforcing material that is lightweight, exhibits little decrease in yield strength even at high temperatures, and has high strength. [Means for Solving the Problems] The reinforcing material for mortar or concrete of the present invention contains carbon fibers and a hydrate of hydraulic inorganic fine powder, and the carbon fibers are continuous fibers, and the content of the carbon fibers is a continuous fiber. The volume ratio is 5 to 30%, and these are one-dimensionally oriented and dispersed, and the average particle size of the hydraulic inorganic fine powder used is less than the diameter of the carbon fibers, and each carbon fiber is interposed between them. hydrates of the hydraulic inorganic fine powder, and a part or all of the hydrates of the hydraulic inorganic fine powder are exposed on the surface. [Function] Carbon fiber is contained in the composition from 5% to 30% by volume, and the upper limit is high, so it is possible to contain a large amount of carbon fiber, so this concrete reinforcement material has increased strength. do. If it is less than 5%, the drying shrinkage of the cured product of the hydraulic inorganic fine powder will be larger than normal, and this shrinkage cannot be fully restrained, so cracks are likely to occur inside the cured product, and the expected effect will not be exhibited. In addition, since the average particle size of the hydraulic inorganic fine powder used is less than the diameter of the carbon fiber,
During impregnation production, the hydraulic inorganic fine powder sufficiently wraps around between each carbon fiber, and the hydrate of this hydraulic inorganic fine powder reliably connects each carbon fiber. This means that the hydrate of the hydraulic inorganic fine powder is uniformly dispersed between the one-dimensionally oriented carbon fibers, so that the characteristics of the carbon fibers as a reinforcing material can be fully utilized. From this point of view, the strength of this concrete reinforcing material is increased, and the bending and cutting of the carbon fibers themselves by the hydraulic inorganic fine powder, which occurs when hydraulic inorganic fine powder with a large particle size is used, is prevented. In addition,
The hydraulic fine powder is a fine powder of Portland cement, alumina cement, sulfate-resistant cement, blast furnace cement, or a mixture of these and ultrafine silica particles having latent hydraulic properties, or a fine powder containing these as a main component. Moreover, even if the carbon fibers are one-dimensionally oriented at a high volume ratio, the microscopic linearity of the carbon fibers and the dispersibility of each fiber are ensured. Furthermore, in this invention, since the hydraulic inorganic fine powder hydrate is also exposed on the surface of the concrete reinforcing material, it is highly compatible with the poured concrete.
The reinforcement body and the poured concrete are strongly bonded. For this reason, the reinforcing effect of concrete becomes remarkable, and at the same time, since the main components of the reinforcing body are carbon fiber and cement hydrate that bind them, it is highly durable, so the bond between concrete and reinforcing material is improved. It doesn't make you vulnerable. Note that the above-mentioned effect of firmly bonding the reinforcing material of the present invention and concrete does not prevent the formation of irregularities on the surface of the reinforcing material of the present invention to further strengthen the bonding force. The concrete reinforcing material of the present invention will be explained below with reference to the components and blending examples shown in Table 1. It is based on a combination of ingredients and combinations as shown in the table.
This is in a sufficiently hydrated and hardened state.
以上説明したように、この発明に用いられる炭
素繊維は配合物に体積比５％から30％まで含まれ
ていて、その上限値が高いため多量の炭素繊維を
含むことが可能であるから、この配合物により形
成されるコンクリート補強材は強度が増大する。
また使用する水硬性無機微粉体は平均粒形が炭素
繊維の直径以下となつているから、水硬性無機微
粉体が各炭素繊維間に充分に回り込み、この微粒
子の水和物が各炭素繊維間を確実に連結すること
になるため、この意味からもこの発明に係る補強
材の強度が増大する。
特に、この発明において、水硬性無機微粉体の
平均粒径を前記のように極端に小さくしているこ
とは、前記粒子が炭素繊維を屈曲させることを防
止することになり、且つ炭素繊維相互の間隔を小
さくすることができるから、補強材の含有炭素繊
維量の増大を可能にしている。このかとからも、
この発明の補強材では、水硬性無機微粉体の粒径
を小さくしたことが、第１に多量の炭素繊維の含
有を可能とし、且つ第２に炭素繊維間を水硬性無
機微粉体が強固に結合することを実現させたもの
であり、これらの結果優れたコンクリート補強材
を作ることができるという効果がある。
さらにこの発明によれば、水硬性無機微粉体の
水和物がコンクリート補強材の表面にも露出して
いるため、打設されたコンクリートとの親和性に
富み、補強体と打設コンクリートとの結合が強固
になされる。このため、コンクリートの補強効果
は顕著になり、なおかつ、補強体の主成分が炭素
繊維とこれを結合する水硬性無機微粉体の水和物
であるため耐久性に富むことから、コンクリート
と補強材との間の結合が脆弱になることはない。
また、炭素繊維は水硬性無機微粉体の水和物によ
つて結合されていて容易に屈曲や破損を生じない
ため、この補強材をモルタルやコンクリート打設
領域に配置する作業中や、打設されたモルタルや
コンクリートの骨材による炭素繊維の破損を生じ
るおそれもないから、この発明による補強材の補
強効果は高い。また、まだ固まらない状態の前記
配合物を、恰もロープを引き回すようにして配設
し、そのままモルタルやコンクリートを打設して
一体化することも可能となる。
〔実施例〕
表−１に示した水硬性無機微粉体スラリー（母
材混合物）を調製し、ここに炭素繊維束（6000フ
イラメント束、単繊維直径7μｍ）を引張り張力
20mg／ｄにて連続的に浸漬し、繊維間に水硬性無
機微粉体スラリーを含浸させ、水硬性無機微粉体
スラリー含浸炭素繊維束とした。この炭素繊維束
51本を内径10mmφ長さ１ｍのアクリル樹脂チユー
ブ中に導入し、20℃にて24時間静置後50℃温水中
48時間浸漬した。この段階でチユーブより取り出
しさらに１週間室内に静置した後、180℃の高圧
水蒸気養生を７時間行つてほぼ完全に硬化させ
た。得られた成形物は、実質的に連続繊維が一次
元配向されており、繊維間には水和物が介在して
いた。
また、この成形物の断面を走査型電子顕微鏡写
真にて示すと第３，４図の通りである。第３，４
図において２は炭素繊維、５は母材を示す。
得られた棒状成形物の表面をサンドペーパーに
削り面荒し後、ASTMC234−62（鉄筋ボンドによ
るコンクリート試験方法）に示される方法に準じ
て試験体を作成した。比較のため同一直径の普通
丸鋼の試験体も作成した。使用したコンクリート
の圧縮強度は290Kg／cm2で、付着応力度は32Kg
ｆ／cm2であつたが、本実施例の棒状形成物の付着
応力度はこれを約10％大きい値を示し、良好な付
着性を有していることが確認された。なお、この
棒状成形物の引張強度は1900Kgｆ／cm2である。
As explained above, the carbon fiber used in this invention is contained in the compound at a volume ratio of 5% to 30%, and since the upper limit is high, it is possible to contain a large amount of carbon fiber. The concrete reinforcement formed by the mix has increased strength.
In addition, the average particle size of the hydraulic inorganic fine powder used is less than the diameter of the carbon fibers, so the hydraulic inorganic fine powder wraps around between each carbon fiber, and the hydrated particles of this fine particle are distributed between each carbon fiber. In this sense, the strength of the reinforcing material according to the present invention increases. In particular, in this invention, the average particle size of the hydraulic inorganic fine powder is extremely small as described above, which prevents the particles from bending the carbon fibers and also prevents the carbon fibers from bending. Since the spacing can be reduced, it is possible to increase the amount of carbon fiber contained in the reinforcing material. From Konoka too,
In the reinforcing material of this invention, the particle size of the hydraulic inorganic fine powder is reduced, which firstly enables the inclusion of a large amount of carbon fiber, and secondly, the hydraulic inorganic fine powder firmly connects the carbon fibers. As a result, it is possible to create an excellent concrete reinforcement material. Furthermore, according to this invention, since the hydrate of the hydraulic inorganic fine powder is also exposed on the surface of the concrete reinforcing material, it has a high affinity with the poured concrete, and the reinforcing material and the poured concrete have good compatibility. A strong connection is made. For this reason, the reinforcing effect of concrete becomes remarkable, and since the main component of the reinforcing body is a hydrate of carbon fiber and hydraulic inorganic fine powder that binds it, it is highly durable. The bond between them will not become weak.
In addition, carbon fibers are bonded by hydrated hydraulic inorganic fine powder and do not easily bend or break. The reinforcing effect of the reinforcing material according to the present invention is high because there is no fear that the carbon fibers will be damaged by the mortar or aggregate of the concrete. Furthermore, it is also possible to arrange the unhardened compound as if it were a rope, and to integrate it by pouring mortar or concrete as it is. [Example] A hydraulic inorganic fine powder slurry (base material mixture) shown in Table 1 was prepared, and a carbon fiber bundle (6000 filament bundle, single fiber diameter 7 μm) was stretched thereto under tension.
The carbon fibers were continuously dipped at 20 mg/d to impregnate the fibers with the hydraulic inorganic fine powder slurry to form a carbon fiber bundle impregnated with the hydraulic inorganic fine powder slurry. This carbon fiber bundle
51 tubes were introduced into an acrylic resin tube with an inner diameter of 10 mmφ and a length of 1 m, and after standing at 20°C for 24 hours, they were placed in warm water at 50°C.
Soaked for 48 hours. At this stage, it was taken out of the tube and allowed to stand indoors for another week, followed by high-pressure steam curing at 180°C for 7 hours to almost completely cure it. In the obtained molded article, substantially continuous fibers were oriented in one dimension, and hydrates were present between the fibers. Further, the cross section of this molded product is shown in FIGS. 3 and 4 using scanning electron micrographs. 3rd, 4th
In the figure, 2 indicates the carbon fiber and 5 indicates the base material. After roughening the surface of the obtained rod-shaped molded article with sandpaper, a test specimen was prepared according to the method shown in ASTMC234-62 (concrete test method using reinforcing steel bond). For comparison, a test piece of ordinary round steel with the same diameter was also created. The compressive strength of the concrete used was 290Kg/ cm2 , and the adhesive stress was 32Kg.
f/cm 2 , but the adhesion stress of the rod-shaped product of this example was about 10% larger than this, confirming that it had good adhesion. The tensile strength of this rod-shaped molded product is 1900 Kgf/cm 2 .
第１図はこの発明の一実施例を示す半断面図、
第２図ａ及びｂはそれぞれこの発明の他の実施例
を示す斜視図、第３図及び第４図はそれぞれこの
発明の実施例の繊維の形状とセメント粒子構造と
を示す電子顕微鏡写真（1580倍）である。
１……コンクリート補強材、２……炭素繊維、
３……水硬性無機微粉体の水和物、４……シリカ
ヒユームの水和物、５……母材。
FIG. 1 is a half-sectional view showing an embodiment of the present invention;
FIGS. 2a and 2b are perspective views showing other embodiments of the present invention, and FIGS. 3 and 4 are electron micrographs (1580 times). 1... Concrete reinforcement material, 2... Carbon fiber,
3...Hydraulic inorganic fine powder hydrate, 4...Silica hume hydrate, 5...Base material.
Claims (1)
み、前記炭素繊維は連続繊維であり含有量が全体
に対する体積比で５〜30％であつて、これらが一
次元配向且つ分散されてなり、また使用する水硬
性無機微粉体の平均粒径は炭素繊維の直径以下で
あり、各炭素繊維がその間に介在される前記水硬
性無機微粉体の水和物により結合され、且つ表面
に前記水硬性無機微粉体の水和物の一部又は全部
が露出されてなるモルタルまたはコンクリート用
補強材。 ２ 水硬性無機微粉体の水和物は、炭素繊維の直
径より大きい粒径のものが水硬性無機微粉体総量
に対する体積比で30％以下である特許請求の範囲
第１項記載のモルタルまたはコンクリート用補強
材。 ３ 切断面で観察される、相隣接する炭素繊維間
の距離が、該炭素染繊維の半径より離れているも
のの割合が80％以上である特許請求の範囲第１項
又は第２項記載のモルタルまたはコンクリート用
補強材。 ４ 水硬性無機微粉体は、炭素繊維の直径より大
きい粒径のものが水硬性無機微粉体総量に対して
体積比で30％以下であり、且つ炭素繊維の直径よ
り大きい粒径をもつ水硬性無機微粉体の含有量
が、炭素繊維含有量が５〜10％未満の場合は30％
以下、炭素繊維含有量が10〜20％未満の場合は20
％以下、炭素繊維含有量が20〜30％の場合には10
％以下である特許請求の範囲第１項又は第３項の
いずれかに記載のモルタルまたはコンクリート用
補強材。 ５ 水硬性無機微粉体が、ポルトランドセメン
ト、高炉セメント、アルミナセメント、耐硫酸塩
セメントの少なくともいずれかの微粉体又はこれ
らを主成分とする微粉体である特許請求の範囲第
１項又は第４項のいずれかに記載のモルタルまた
はコンクリート用補強材。 ６ 炭素繊維は全体の断面に実質的に平均して分
散している特許請求の範囲第１項ないし同第５項
のいずれかに記載のモルタルまたはコンクリート
用補強材。 ７ 高圧水蒸気養生により硬化させてなる特許請
求の範囲第１項ないし同第６項のいずれかに記載
のモルタルまたはコンクリート用補強材。[Scope of Claims] 1 Contains carbon fibers and a hydrate of hydraulic inorganic fine powder, the carbon fibers being continuous fibers and having a content of 5 to 30% by volume relative to the whole, which are primary fibers. The hydraulic inorganic fine powder used is originally oriented and dispersed, and the average particle size of the hydraulic inorganic fine powder used is less than the diameter of the carbon fibers, and each carbon fiber is bonded by the hydrate of the hydraulic inorganic fine powder interposed therebetween. A reinforcing material for mortar or concrete, in which a part or all of the hydrate of the hydraulic inorganic fine powder is exposed on the surface. 2. The mortar or concrete according to claim 1, wherein the hydrate of the hydraulic inorganic fine powder has a particle size larger than the diameter of the carbon fibers in a volume ratio of 30% or less to the total amount of the hydraulic inorganic fine powder. reinforcement material. 3. The mortar according to claim 1 or 2, wherein the distance between adjacent carbon fibers observed on a cut surface is greater than the radius of the carbon dyed fibers in a proportion of 80% or more. or reinforcement for concrete. 4 Hydraulic inorganic fine powder has a particle size larger than the diameter of carbon fibers, and the volume ratio of the hydraulic inorganic fine powder is 30% or less of the total amount of hydraulic inorganic fine powder, and the hydraulic inorganic fine powder has a particle size larger than the diameter of carbon fibers. 30% if the inorganic fine powder content is less than 5-10% carbon fiber content
Below, 20 if the carbon fiber content is less than 10-20%
% or less, 10 if the carbon fiber content is 20-30%
% or less, the reinforcing material for mortar or concrete according to claim 1 or 3. 5. Claims 1 or 4, wherein the hydraulic inorganic fine powder is a fine powder of at least one of Portland cement, blast furnace cement, alumina cement, and sulfate-resistant cement, or a fine powder mainly composed of these. Reinforcement material for mortar or concrete as described in any of the above. 6. The reinforcing material for mortar or concrete according to any one of claims 1 to 5, wherein the carbon fibers are substantially evenly distributed over the entire cross section. 7. A reinforcing material for mortar or concrete according to any one of claims 1 to 6, which is cured by high-pressure steam curing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6956786A JPS62226847A (en) | 1986-03-27 | 1986-03-27 | Reinforcing material for mortar or concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6956786A JPS62226847A (en) | 1986-03-27 | 1986-03-27 | Reinforcing material for mortar or concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62226847A JPS62226847A (en) | 1987-10-05 |
| JPH0568419B2 true JPH0568419B2 (en) | 1993-09-28 |
Family
ID=13406482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6956786A Granted JPS62226847A (en) | 1986-03-27 | 1986-03-27 | Reinforcing material for mortar or concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62226847A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019034486A (en) * | 2017-08-17 | 2019-03-07 | 日本電気硝子株式会社 | Method for molding cured body |
-
1986
- 1986-03-27 JP JP6956786A patent/JPS62226847A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62226847A (en) | 1987-10-05 |
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