JP2003003605A - Fiber-reinforced concrete member - Google Patents

Fiber-reinforced concrete member

Info

Publication number
JP2003003605A
JP2003003605A JP2001185916A JP2001185916A JP2003003605A JP 2003003605 A JP2003003605 A JP 2003003605A JP 2001185916 A JP2001185916 A JP 2001185916A JP 2001185916 A JP2001185916 A JP 2001185916A JP 2003003605 A JP2003003605 A JP 2003003605A
Authority
JP
Japan
Prior art keywords
polyacetal
concrete member
fiber bundle
fiber
reinforced concrete
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
Application number
JP2001185916A
Other languages
Japanese (ja)
Inventor
Takaki Watanabe
貴樹 渡辺
Ryohei Shimizu
良平 清水
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asahi Kasei Corp
Original Assignee
Asahi Kasei Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Asahi Kasei Corp filed Critical Asahi Kasei Corp
Priority to JP2001185916A priority Critical patent/JP2003003605A/en
Publication of JP2003003605A publication Critical patent/JP2003003605A/en
Pending legal-status Critical Current

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  • Reinforcement Elements For Buildings (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a fiber-reinforced concrete member being easily executed and being capable of obtaining high strength. SOLUTION: In the fiber-reinforced concrete member in which reinforcements are buried as axial reinforcing materials, polyacetal fiber bundles in which a plurality of polyacetal monofilaments having a tensile elastic modulus from 20 Gpa to 150 Gpa and a means outside diameter from 0.4 mm to 100 mm are collected are buried in the concrete member as a reinforcing material in the direction orthogonal to the axial reinforcing materials.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、土木・建築構造物
等に使用される繊維補強されたコンクリート部材に関す
るものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber-reinforced concrete member used in civil engineering / building structures and the like.

【0002】[0002]

【従来の技術】従来、土木・建築構造物等に使用される
コンクリート部材としては、コンクリート部材の軸方向
補強材として異形鉄筋や丸鋼等からなる主筋を配置し、
該コンクリート部材の軸方向と直交する方向の補強材
(以下、単に「横補強材」という)として前記主筋の配
置、形状、寸法に合わせて主に最外部主筋の外側に接す
るようにポリアセタールモノフィラメント単体(特開20
01−20455)を施工現場において配置してコンクリート
を打設し、コンクリート部材の内部に埋設していた。ポ
リアセタール繊維は常温での加工が容易に出来るため、
現場で曲げ加工を容易に行うことが出来、設計変更など
に柔軟に対応できる。
2. Description of the Related Art Conventionally, as a concrete member used for civil engineering, building structures, etc., a main bar made of deformed rebar or round steel is arranged as an axial reinforcing material for the concrete member,
As a reinforcing material in the direction orthogonal to the axial direction of the concrete member (hereinafter, simply referred to as "lateral reinforcing material"), a polyacetal monofilament unitary body so as to come into contact with the outside of the outermost main reinforcing bar mainly in accordance with the arrangement, shape and size of the main bars. (JP 20
01-20455) was placed at the construction site, concrete was poured, and it was buried inside the concrete member. Since polyacetal fiber can be easily processed at room temperature,
Bending can be easily performed on site, and it is possible to flexibly respond to design changes.

【0003】また、鉄骨鉄筋コンクリート部材において
も、鉄骨を建てた後、前述と同様に主筋、ポリアセター
ルモノフィラメント単体を配置し、コンクリートを打設
していた。しかしながら、前述の従来例において、ポリ
アセタールモノフィラメント単体を横補強筋として使用
する場合、鉄筋による帯筋と同等の性能を得るには繊維
を何重にも主筋に巻く必要があり、的確に繊維を配置す
るには手間がかかる。
Also, in the steel frame reinforced concrete member, after the steel frame is built, the main bar and the polyacetal monofilament alone are arranged in the same manner as described above and the concrete is poured. However, in the above-mentioned conventional example, when the polyacetal monofilament alone is used as the lateral reinforcing bar, it is necessary to wind the fiber in multiple layers around the main bar in order to obtain the same performance as the reinforcing bar made of the reinforcing bar. It takes time to do.

【0004】また、ポリアセタールモノフィラメント単
体を横補強筋として何重にも巻くと、モノフィラメント
自体の全長が長くなり、たるみを生じる可能性がある。
さらにポリアセタールモノフィラメント単体を何重にも
巻く場合、モノフィラメント間にずれが生じ、主筋に対
して確実な定着を行えない可能性がある。ポリアセター
ルモノフィラメントの長さを抑えるためにモノフィラメ
ント単体の断面積を大きくすると、生産上の理由により
引張強度の低下が生じる。
Further, if the polyacetal monofilament itself is wound in multiple layers as lateral reinforcing bars, the total length of the monofilament itself becomes long, which may cause slack.
Further, when the polyacetal monofilament alone is wound in multiple layers, a deviation may occur between the monofilaments, and reliable fixing to the main bar may not be possible. If the cross-sectional area of the monofilament itself is increased in order to suppress the length of the polyacetal monofilament, the tensile strength is lowered due to production reasons.

【0005】[0005]

【発明が解決しようとする課題】本発明は前記課題を解
決するものであり、その目的とするところは、施工が容
易で且つ高い強度の補強コンクリート部材を提供するも
のである。
SUMMARY OF THE INVENTION The present invention is intended to solve the above problems, and an object of the present invention is to provide a reinforced concrete member which is easy to construct and has high strength.

【0006】[0006]

【課題を解決するための手段】即ち本発明は、次の通り
である。第1の発明は、軸方向補強材として鉄筋が埋設
されたコンクリート部材であって、該コンクリート部材
内に前記軸方向と直交する方向の補強材として、引張弾
性率が20Gpa以上150Gpa以下で且つ平均外径が0.4mm以上
100mm以下のポリアセタールモノフィラメントを複数本
寄せ集めたポリアセタール繊維束が埋設されていること
を特徴とする繊維補強コンクリート部材。第2の発明
は、コンクリート部材内の軸方向と直交する方向の補強
材として、鉄筋とポリアセタール繊維束とが埋設されて
いることを特徴とする第1の発明に記載の繊維補強コン
クリート部材。
That is, the present invention is as follows. A first aspect of the present invention is a concrete member in which reinforcing bars are embedded as an axial reinforcing material, and the tensile elastic modulus is 20 GPa or more and 150 GPa or less and average as a reinforcing material in the concrete member in a direction orthogonal to the axial direction. Outer diameter is 0.4 mm or more
A fiber-reinforced concrete member having a polyacetal fiber bundle in which a plurality of polyacetal monofilaments of 100 mm or less are gathered together and embedded. A second invention is the fiber-reinforced concrete member according to the first invention, in which a reinforcing bar and a polyacetal fiber bundle are embedded as a reinforcing member in a direction orthogonal to the axial direction within the concrete member.

【0007】第1の発明によれば、引張弾性率が20Gpa
以上150Gpa以下で且つ平均外径が0.4mm以上100mm以下の
ポリアセタールモノフィラメントを複数本寄せ集めたポ
リアセタール繊維束を補強材としてコンクリート部材内
に埋設したことで、高い強度を得ることが出来、軽量で
且つ常温で加工出来、また、ポリアセタールモノフィラ
メント単体を補強材として使用する場合と比較して主筋
に周回させる回数を減らせるため、施工が容易になり且
つ工期の短縮を図ることが出来る。第2の発明によれ
ば、配筋の困難な接合部内に前記ポリアセタール繊維束
を補強材としてコンクリート部材内に埋設し、鉄筋は配
筋し易い部分のみに使用することによって全体の施工性
が向上する。
According to the first invention, the tensile elastic modulus is 20 Gpa.
By embedding polyacetal fiber bundles having a plurality of polyacetal monofilaments having an average outer diameter of not less than 150 GPa and not more than 0.4 mm and not more than 100 mm in a concrete member as a reinforcing material, it is possible to obtain high strength, light weight, and Since it can be processed at room temperature, and the number of cycles around the main bar can be reduced compared to the case where a single polyacetal monofilament is used as a reinforcing material, the construction can be facilitated and the construction period can be shortened. According to the second aspect of the present invention, the polyacetal fiber bundle is embedded in the concrete member as a reinforcing material in the joint where the reinforcement is difficult, and the reinforcing bar is used only in the part where the reinforcement is easy to improve the overall workability. To do.

【0008】[0008]

【発明の実施の形態】図により本発明に係る繊維補強コ
ンクリート部材の一実施形態を具体的に説明する。図1
は本発明に係る繊維補強コンクリート部材の第1実施形
態の構成を示す横断面図、図2は本発明に係る繊維補強
コンクリート部材の第1実施形態の構成を示す縦断面
図、図3(a)(b)は第1実施形態において主筋に対する
ポリアセタール繊維束の端部の結束の一例を示す模式斜
視図、図4(a)(c)(d)は本発明に係るポリアセター
ル繊維束の一例を示す断面図である。
BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the fiber reinforced concrete member according to the present invention will be specifically described with reference to the drawings. Figure 1
FIG. 3 is a cross-sectional view showing the configuration of the first embodiment of the fiber-reinforced concrete member according to the present invention, FIG. 2 is a vertical cross-sectional view showing the configuration of the first embodiment of the fiber-reinforced concrete member according to the present invention, and FIG. ) (B) is a schematic perspective view showing an example of binding of end portions of the polyacetal fiber bundle to the main bar in the first embodiment, and FIGS. 4 (a), (c) and (d) are examples of the polyacetal fiber bundle according to the present invention. It is sectional drawing shown.

【0009】次に図1を用いて本発明に係る繊維補強コ
ンクリート部材の第1実施形態の構成について説明す
る。図1において、1は土木・建築構造物等に使用される
コンクリート部材であり、該コンクリート部材1の軸方
向(図1の左右方向)の補強材として異形鉄筋や丸鋼か
らなる複数の主筋2が配置され、横補強筋としてポリア
セタール繊維束3が主筋2に沿って複数の主筋2の角隅部
に配置された主筋2aを囲い込むように巻回されて配置さ
れ、図示しない型枠内にコンクリートを打設して主筋2
及びポリアセタール繊維束3をコンクリート部材1内に一
体的に埋設して固化させる。
Next, the configuration of the first embodiment of the fiber-reinforced concrete member according to the present invention will be described with reference to FIG. In FIG. 1, 1 is a concrete member used for civil engineering / building structures, etc., and a plurality of main bars 2 made of deformed rebar or round steel as reinforcements in the axial direction of the concrete member 1 (left and right direction in FIG. 1). Is arranged, the polyacetal fiber bundle 3 as a lateral reinforcing bar is wound and arranged so as to surround the main bars 2a arranged at the corners of the plurality of main bars 2 along the main bars 2, and is arranged in a formwork (not shown). Placing concrete to main bar 2
Also, the polyacetal fiber bundle (3) is integrally embedded in the concrete member (1) and solidified.

【0010】本発明で用いられるポリアセタール繊維と
しては、その引張弾性率が高くなれば高引張強度とな
り、初期の補強効果が向上するものの、破断伸度が低く
なり、補強時の変形性能が低下することから、引張弾性
率が20Gpa以上150Gpa以下であることが好ましい。ま
た、細径のものは主筋2に対する巻回数が増加するため
施工性が低く、太径のものは高度な製造技術が必要とな
るため生産性が低下することから平均外径が0.4mm以上1
00mm以下のものであることが好ましい。さらにモノフィ
ラメントであって、加工性、補強効果の点で乾式紡糸に
より10倍以上に延伸されたものが好ましく、線膨張係数
-4〜10-6deg-1、引張り強度0.9〜1.5GPa、引張り伸度3
〜10%、比重1.4〜1.45のものが好ましい。
As for the polyacetal fiber used in the present invention, if the tensile elastic modulus becomes high, the tensile strength becomes high and the initial reinforcing effect is improved, but the breaking elongation becomes low and the deformability at the time of reinforcing is lowered. Therefore, the tensile elastic modulus is preferably 20 Gpa or more and 150 Gpa or less. In addition, the thin outer diameter has more workability due to an increase in the number of windings around the main bar 2, and the thick outer diameter requires a high manufacturing technology, which lowers the productivity. Therefore, the average outer diameter is 0.4 mm or more.
It is preferably 00 mm or less. Furthermore, monofilaments, which are drawn 10 times or more by dry spinning in terms of workability and reinforcing effect, are preferable.
-4 to 10 -6 deg -1 , tensile strength 0.9 to 1.5 GPa, tensile elongation 3
It is preferably -10% and a specific gravity of 1.4-1.45.

【0011】図1及び図2に示すように、ポリアセタール
繊維束3は主筋2に沿って複数の主筋2の角隅部に配置さ
れた主筋2aを囲い込むように巻回されて配置され、その
可撓性及び変形残留性から主筋2同士が複数の異なる方
向から伸びて交差して配置されるような複雑に入り組む
主筋2にも容易に巻き付けて配置できる。その際、図4
(b)に示すごとくポリアセタール繊維束を主筋2のリ
ブとリブの間に収まるように配置すれば主筋2相互の位
置ずれを防止することが出来る。この時、打設するコン
クリートの流動性を確保するため、ポリアセタール繊維
束3の配置間隔はコンクリートの粗骨材の最大外形寸法
以上とすることが望ましい。
As shown in FIGS. 1 and 2, the polyacetal fiber bundle 3 is wound around the main bars 2 along the main bars 2 so as to surround the main bars 2a. Due to its flexibility and deformability, the main bars 2 can be easily wound and arranged even on complicated main bars 2 in which the main bars 2 extend from a plurality of different directions and are arranged to intersect each other. At that time,
If the polyacetal fiber bundle is arranged so as to fit between the ribs of the main bar 2 as shown in (b), it is possible to prevent the main bar 2 from being displaced from each other. At this time, in order to secure the fluidity of the concrete to be placed, it is desirable that the arrangement interval of the polyacetal fiber bundles 3 be equal to or larger than the maximum outer dimension of the coarse aggregate of concrete.

【0012】ポリアセタール繊維束3は図1に示すように
螺旋状に連続的に主筋2に巻き付けて配置しても良い
し、1周回あるいは数周回毎に切断されたものを主筋2に
巻き付けて結束しても良い。従来のようにポリアセター
ルモノフィラメント単体を補強筋として主筋に周回させ
る場合と比較して、本発明ではポリアセタール繊維束の
引張強度が高いため、所定の強度を持たせるために必要
な周回数を減らすことが出来る。
The polyacetal fiber bundle 3 may be spirally wound around the main bar 2 continuously as shown in FIG. 1, or the polyacetal fiber bundle 3 may be wound around the main bar 2 after being wound once or several times. You may. Compared with the conventional case in which the polyacetal monofilament alone is circulated around the main bar as a reinforcing bar, since the tensile strength of the polyacetal fiber bundle is high in the present invention, it is possible to reduce the number of cycles required to have a predetermined strength. I can.

【0013】ポリアセタール繊維束3の主筋2に対する結
束方法としては、例えば図3(a)(b)に示すように、
ポリアセタール繊維束3の端部3aを主筋2に結束させる方
法がある。即ち、図3(a)に示すようにポリアセタール
繊維束3の端部3aを主筋2に結び付けても良いし、図3
(b)に示すように、ポリアセタール繊維束3を繊維方向
と同方向に裂き、その裂け目に主筋2を通し、端部3aを
結び付けても良い。また、ポリアセタール繊維束3は補
強材として鉄骨鉄筋コンクリート部材にも適用可能であ
り、柱、梁、基礎、スラブ、壁等のコンクリート部材に
使用できる。特に接合部等の複雑な配置が必要な箇所に
好適である。
As a method of binding the polyacetal fiber bundle 3 to the main bar 2, for example, as shown in FIGS. 3 (a) and 3 (b),
There is a method of binding the end 3a of the polyacetal fiber bundle 3 to the main bar 2. That is, the end 3a of the polyacetal fiber bundle 3 may be tied to the main bar 2 as shown in FIG.
As shown in (b), the polyacetal fiber bundle 3 may be split in the same direction as the fiber direction, the main bar 2 may be passed through the split, and the ends 3a may be tied together. Further, the polyacetal fiber bundle 3 can also be applied to a steel-framed reinforced concrete member as a reinforcing material, and can be used for concrete members such as columns, beams, foundations, slabs and walls. Especially, it is suitable for a place where a complicated arrangement is required such as a joint portion.

【0014】図4(a)は上記ポリアセタールモノフィラ
メント5を同一直線上に配置し、細径の繊維等4を用いて
シート状に編み込んだポリアセタール繊維束である。ポ
リアセタール繊維束の幅に関しては、引張強度、施工の
容易さを考慮して決定する必要がある。同図ではポリア
セタールモノフィラメントを一列に配したが、2列、3列
と複数列に及んでも良い。図4(b)に示すように主筋と
して異形鉄筋を用いる場合、鉄筋との定着を強固なもの
にするため、鉄筋のリブとリブの間に収まるような繊維
束の幅であることが望ましい。また、細径の繊維等を破
断することにより簡単にポリアセタール繊維束を裂くこ
とが可能である。束ねる繊維数は5本〜30本程度が望ま
しい。
FIG. 4 (a) shows a polyacetal fiber bundle in which the polyacetal monofilament 5 is arranged on the same straight line and is knitted in a sheet form using fibers 4 having a small diameter. The width of the polyacetal fiber bundle must be determined in consideration of tensile strength and ease of construction. Although the polyacetal monofilaments are arranged in one row in the figure, they may be arranged in two rows, three rows and a plurality of rows. When deformed bar is used as the main bar as shown in FIG. 4 (b), it is preferable that the width of the fiber bundle is set so as to fit between the ribs of the bar in order to strengthen the fixation with the bar. Further, it is possible to easily tear the polyacetal fiber bundle by breaking the thin fibers and the like. The number of fibers to be bundled is preferably about 5 to 30.

【0015】図4(c)は上記ポリアセタールモノフィラ
メント複数本を同一直線上に配置し、耐アルカリ性を有
するEVA(Ethylene−vinylacetate copolymer)等の素
材6でコーティングを施したポリアセタール繊維束であ
る。同図ではポリアセタールモノフィラメントを一列に
配したが、2列、3列と複数列に及んでも良い。図4(b)
に示すように主筋として異形鉄筋を用いる場合、鉄筋と
の定着を強固なものにするため、鉄筋のリブとリブの間
に収まるような繊維束の幅であることが望ましく、束ね
る繊維数は5本〜30本程度がよい。
FIG. 4 (c) shows a polyacetal fiber bundle in which a plurality of the above polyacetal monofilaments are arranged on the same straight line and coated with a material 6 such as EVA (Ethylene-vinylacetate copolymer) having alkali resistance. Although the polyacetal monofilaments are arranged in one row in the figure, they may be arranged in two rows, three rows and a plurality of rows. Figure 4 (b)
When using deformed rebar as the main bar as shown in Fig. 5, in order to strengthen the anchoring with the rebar, it is desirable that the width of the fiber bundle fits between the ribs of the rebar and the number of fibers to be bundled is 5 Books ~ 30 are good.

【0016】図4(d)はポリアセタールモノフィラメン
ト5を複数本束ね、撚り合わせてストランド状にしたポ
リアセタール繊維束である。撚り合わせるモノフィラメ
ントの数は、引張強度、施工の容易さを考慮して5本以
上40本以下が望ましい。前述したポリアセタールモノフ
ィラメントを寄せ集めた繊維束は、従来のようにポリア
セタールモノフィラメント1本を横補強筋に用いる場合
と比較して、断面積が大きくなるため、所定の引張強度
を得るための本数が減り、何重にも主筋に巻回する必要
がなくなり、工期の短縮が図れる。
FIG. 4D shows a polyacetal fiber bundle in which a plurality of polyacetal monofilaments 5 are bundled and twisted to form a strand. The number of monofilaments to be twisted together is preferably 5 or more and 40 or less in consideration of tensile strength and ease of construction. The fiber bundle that collects the above-mentioned polyacetal monofilaments has a larger cross-sectional area compared to the case where one polyacetal monofilament is used for the transverse reinforcing bar as in the conventional case, and therefore the number for obtaining a predetermined tensile strength is reduced. Since it is not necessary to wind the main bar in multiple layers, the construction period can be shortened.

【0017】また、ポリアセタールモノフィラメントを
寄せ集めた繊維束は、従来のようにポリアセタールモノ
フィラメント1本を横補強筋に用いる場合と比較して、
上述したように所定の強度を得るために必要な巻回数が
減るため、繊維束の全長を短縮できる。さらに、ポリア
セタール繊維束は、繊維間に拘束力が働き、繊維にたる
みが発生するのを抑制することが出来る。
Further, the fiber bundle in which the polyacetal monofilaments are gathered together is compared with the conventional case where one polyacetal monofilament is used for the lateral reinforcing bar,
As described above, since the number of windings required to obtain the predetermined strength is reduced, the total length of the fiber bundle can be shortened. Further, the polyacetal fiber bundle can suppress the occurrence of slack in the fibers due to the binding force acting between the fibers.

【0018】それと同時に、寄せ集めることによってモ
ノフィラメント同士のずれが生じることがなくなり、主
筋に対して確実に定着することができる。次に図5を用
いて本発明に係る繊維補強コンクリート部材の第2実施
形態の構成について説明する。図5は本発明に係る繊維
補強コンクリート部材の第2実施形態を示す模式横断面
図である。尚、前記第1形態と同様に構成したものは同
一の符号を付記して説明を省略する。
At the same time, the misalignment of the monofilaments does not occur due to the gathering, and the monofilaments can be reliably fixed to the main bars. Next, the configuration of the second embodiment of the fiber-reinforced concrete member according to the present invention will be described with reference to FIG. FIG. 5 is a schematic cross-sectional view showing a second embodiment of the fiber reinforced concrete member according to the present invention. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

【0019】前記第1形態では、コンクリート部材1の軸
方向と直交する方向の補強材(横補強材)として、ポリ
アセタール繊維束3のみを用いて構成した場合の一例で
あったが、本実施形態では、図5に示すように、コンク
リート部材1の軸方向と直交する方向の補強材(横補強
材)として異形鉄筋や丸鋼からなる帯筋7とポリアセタ
ール繊維束3を併用したものである。図5において、コン
クリート部材1の軸方向(図5の左右方向)に配置された
主筋2の形状、配置に応じて該主筋2の接合部以外の部位
で該主筋2を取り囲むように予め工場等で折り曲げ加工
された帯筋7が主筋2に沿って所定の間隔を持って配置さ
れ、図示しない針金等の番線により主筋2に結束されて
固定される。
The first embodiment is an example in which only the polyacetal fiber bundle 3 is used as the reinforcing material (transverse reinforcing material) in the direction orthogonal to the axial direction of the concrete member 1. Then, as shown in FIG. 5, as a reinforcing material (lateral reinforcing material) in a direction orthogonal to the axial direction of the concrete member 1, a banded bar 7 made of deformed rebar or round steel and a polyacetal fiber bundle 3 are used together. In FIG. 5, the shape of the main reinforcement 2 arranged in the axial direction of the concrete member 1 (the left-right direction in FIG. 5), a factory or the like so as to surround the main reinforcement 2 at a portion other than the joint portion of the main reinforcement 2 according to the arrangement. The strips 7 bent by are arranged at a predetermined interval along the main bar 2, and are bound and fixed to the main bar 2 by a wire such as a wire (not shown).

【0020】その後、前記第1実施形態と同様に帯筋7間
及び主筋2同士が交差して配置される柱梁やスラブ等の
接合部にポリアセタール繊維束3を主筋2のリブとリブと
の間に引っ掛けるように配置すれば主筋2同士の位置の
ずれが生じることはない。そして、図示しない型枠内に
コンクリートを打設してコンクリート部材1内に主筋2、
帯筋7及びポリアセタール繊維束3を一体的に埋設して固
化させる。本実施形態では、配筋の困難な接合部内にポ
リアセタール繊維束3を配置し、帯筋7を配筋し易い部分
のみに使用することによって全体の施工性が向上する。
また、主筋2と帯筋7を結束する事により、前記第1実施
形態のように補強材をポリアセタール繊維束3のみで構
成した場合よりも主筋2の位置をより強固に保持するこ
とが出来るのでより好ましい。
After that, as in the first embodiment, the polyacetal fiber bundle 3 is attached to the ribs of the main bars 2 at the joints of the columns and beams or the slabs where the main bars 2 are arranged so as to intersect each other and between the main bars 2. If they are arranged so as to be caught between them, the main muscles 2 will not be displaced from each other. Then, by placing concrete in a formwork (not shown), the main bar 2 in the concrete member 1,
The stirrup 7 and the polyacetal fiber bundle 3 are integrally embedded and solidified. In the present embodiment, by disposing the polyacetal fiber bundle 3 in the joint where the reinforcement is difficult and using the stirrup 7 only in the portion where the reinforcement is easy, the overall workability is improved.
In addition, by binding the main bar 2 and the stirrup 7, the position of the main bar 2 can be held more firmly than in the case where the reinforcing material is composed only of the polyacetal fiber bundle 3 as in the first embodiment. More preferable.

【0021】[0021]

【発明の効果】本発明は、引張弾性率が20Gpa以上150Gp
a以下で且つ平均外径が0.4mm以上100mm以下のポリアセ
タールモノフィラメントを複数本寄せ集めたポリアセタ
ール繊維束を補強材としてコンクリート部材内に埋設し
たことで、高い強度を得ることが出来、軽量で且つ常温
で加工出来、また、ポリアセタールモノフィラメント単
体を補強材として使用する場合と比較して主筋に周回さ
せる回数を減らせるため、施工が容易になり且つ工期の
短縮を図ることが出来る。
The present invention has a tensile modulus of 20 Gpa or more and 150 Gp or more.
By embedding a polyacetal fiber bundle, in which a plurality of polyacetal monofilaments having an average outer diameter of 0.4 mm or more and 100 mm or less is a or less, into a concrete member as a reinforcing material, it is possible to obtain high strength, light weight, and room temperature. In addition, since the number of times of wrapping around the main bar can be reduced as compared with the case where a single polyacetal monofilament is used as a reinforcing material, the construction can be facilitated and the construction period can be shortened.

【0022】また、ポリアセタールモノフィラメント単
体を補強材として使用する場合と比較して、本発明のポ
リアセタール繊維束は繊維同士の間に繊維方向とは直交
方向に拘束力が働き、その結果繊維束にたるみを生じる
ことがなくなる。また、ポリアセタールモノフィラメン
ト単体を補強材として使用する場合と比較して、本発明
のポリアセタール繊維束は幅があるため、主筋との接地
面積が大きくなり、主筋との定着がより強くなる。第2
の発明にあっては、配筋の困難な接合部内にポリアセタ
ール繊維束を配置し、帯筋は配筋し易い部分のみに配置
して、コンクリート内に埋設することにより、全体の施
工性を向上することができる。
Further, in comparison with the case where a single polyacetal monofilament is used as a reinforcing material, the polyacetal fiber bundle of the present invention exerts a restraining force between the fibers in a direction orthogonal to the fiber direction, resulting in slack in the fiber bundle. Will not occur. Further, as compared with the case where the polyacetal monofilament alone is used as a reinforcing material, the polyacetal fiber bundle of the present invention has a width, so that the ground contact area with the main bar becomes large and the fixation with the main bar becomes stronger. Second
In the invention of (1), the polyacetal fiber bundle is arranged in the joint where the reinforcement is difficult, the reinforcement is placed only in the part where reinforcement is easy, and it is embedded in the concrete to improve the overall workability. can do.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施形態であるポリアセタール繊維
束による補強コンクリート部材の横断面図。
FIG. 1 is a cross-sectional view of a reinforced concrete member using a polyacetal fiber bundle according to an embodiment of the present invention.

【図2】本発明の一実施形態であるポリアセタール繊維
束による補強コンクリート部材の縦断面図。
FIG. 2 is a vertical cross-sectional view of a reinforced concrete member using a polyacetal fiber bundle according to an embodiment of the present invention.

【図3】(a) 繊維束端部固定例の概略図。 (b) 繊維束端部固定例の概略図。FIG. 3A is a schematic view of an example of fixing a fiber bundle end portion. (b) A schematic view of an example of fixing a fiber bundle end portion.

【図4】(a) ポリアセタール繊維束形状例の概略図。 (b) 繊維束固着例の概略図。 (c) ポリアセタール繊維束形状例の概略図。 (d) ポリアセタール繊維束形状例の概略図。FIG. 4 (a) is a schematic view of a polyacetal fiber bundle shape example. (b) A schematic view of an example of fixing a fiber bundle. (c) A schematic view of an example of a polyacetal fiber bundle shape. (d) Schematic diagram of a polyacetal fiber bundle shape example.

【図5】本発明の一実施形態であるポリアセタール繊維
束による補強コンクリート部材の断面図。
FIG. 5 is a cross-sectional view of a reinforced concrete member using a polyacetal fiber bundle according to an embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1:コンクリート 2:主筋 2a:角部主筋 3:ポリアセタール繊維束 3a:ポリアセタール繊維束端部 4:細径の繊維等 5:ポリアセタールモノフィラメント 6:コーティング素材 7:帯筋 1: concrete 2: Main line 2a: Corner main bar 3: Polyacetal fiber bundle 3a: end of polyacetal fiber bundle 4: Fine fiber etc. 5: Polyacetal monofilament 6: Coating material 7: Belt

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 軸方向補強材として鉄筋が埋設されたコ
ンクリート部材であって、該コンクリート部材内に前記
軸方向と直交する方向の補強材として、引張弾性率が20
Gpa以上150Gpa以下で且つ平均外径が0.4mm以上100mm以
下のポリアセタールモノフィラメントを複数本寄せ集め
たポリアセタール繊維束が埋設されていることを特徴と
する繊維補強コンクリート部材。
1. A concrete member having reinforcing bars embedded therein as an axial reinforcing material, wherein the tensile elastic modulus is 20 as a reinforcing material in the concrete member in a direction orthogonal to the axial direction.
A fiber-reinforced concrete member, in which a polyacetal fiber bundle, in which a plurality of polyacetal monofilaments having an average outer diameter of 0.4 mm or more and 100 mm or less and having an average outer diameter of Gpa or more and 150 Gpa or less, is embedded, is embedded.
【請求項2】 コンクリート部材内の軸方向と直交する
方向の補強材として、鉄筋とポリアセタール繊維束とが
埋設されていることを特徴とする請求項1に記載の繊維
補強コンクリート部材。
2. The fiber-reinforced concrete member according to claim 1, wherein a reinforcing bar and a polyacetal fiber bundle are embedded as a reinforcing member in a direction orthogonal to the axial direction in the concrete member.
JP2001185916A 2001-06-20 2001-06-20 Fiber-reinforced concrete member Pending JP2003003605A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001185916A JP2003003605A (en) 2001-06-20 2001-06-20 Fiber-reinforced concrete member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001185916A JP2003003605A (en) 2001-06-20 2001-06-20 Fiber-reinforced concrete member

Publications (1)

Publication Number Publication Date
JP2003003605A true JP2003003605A (en) 2003-01-08

Family

ID=19025423

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001185916A Pending JP2003003605A (en) 2001-06-20 2001-06-20 Fiber-reinforced concrete member

Country Status (1)

Country Link
JP (1) JP2003003605A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005213801A (en) * 2004-01-28 2005-08-11 Asahi Kasei Construction Materials Co Ltd Earthquake resistant reinforcing construction method for foundation
KR101618564B1 (en) 2014-07-03 2016-05-10 코오롱글로벌 주식회사 Three-dimensional type reinforcement for protective and blast resistant and concrete composition using thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005213801A (en) * 2004-01-28 2005-08-11 Asahi Kasei Construction Materials Co Ltd Earthquake resistant reinforcing construction method for foundation
KR101618564B1 (en) 2014-07-03 2016-05-10 코오롱글로벌 주식회사 Three-dimensional type reinforcement for protective and blast resistant and concrete composition using thereof

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