JPH06192980A - Prestressing steel strand and prestressing steel bar, having rust preventing coating and excellent in adhesion and production thereof - Google Patents
Prestressing steel strand and prestressing steel bar, having rust preventing coating and excellent in adhesion and production thereofInfo
- Publication number
- JPH06192980A JPH06192980A JP5174627A JP17462793A JPH06192980A JP H06192980 A JPH06192980 A JP H06192980A JP 5174627 A JP5174627 A JP 5174627A JP 17462793 A JP17462793 A JP 17462793A JP H06192980 A JPH06192980 A JP H06192980A
- Authority
- JP
- Japan
- Prior art keywords
- thermoplastic resin
- steel material
- steel
- prestressing steel
- coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
- D07B1/0693—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a strand configuration
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B5/00—Making ropes or cables from special materials or of particular form
- D07B5/005—Making ropes or cables from special materials or of particular form characterised by their outer shape or surface properties
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B5/00—Making ropes or cables from special materials or of particular form
- D07B5/005—Making ropes or cables from special materials or of particular form characterised by their outer shape or surface properties
- D07B5/006—Making ropes or cables from special materials or of particular form characterised by their outer shape or surface properties by the properties of an outer surface polymeric coating
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2042—Strands characterised by a coating
- D07B2201/2044—Strands characterised by a coating comprising polymers
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2501/00—Application field
- D07B2501/20—Application field related to ropes or cables
- D07B2501/2015—Construction industries
- D07B2501/2023—Concrete enforcements
Landscapes
- Ropes Or Cables (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、プレストレストコンク
リート（以下、「ＰＣコンクリート」という）の緊張に
使用する鋼撚線又は鋼棒からなる鋼材に防錆被覆したＰ
Ｃ鋼材とその製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel material consisting of a steel twisted wire or a steel rod used for tensioning prestressed concrete (hereinafter referred to as "PC concrete"), coated with rust-proof P.
The present invention relates to a C steel material and its manufacturing method.
【０００２】[0002]
【従来の技術】ＰＣコンクリートの製造に際して、ＰＣ
鋼材に予め緊張力を与えた後に、これを埋め込んでコン
クリートを打設し、そのコンクリートの固化後に、ＰＣ
鋼材の両端を開放してコンクリートにプレストレスを導
入するプレテンション工法は、現在、広く用いられてい
る。2. Description of the Related Art When manufacturing PC concrete, PC
After pretensioning the steel material, embedding it in the concrete and placing concrete, and after solidifying the concrete, PC
The pretensioning method of opening both ends of steel and introducing prestress to concrete is widely used at present.
【０００３】しかし、このプレテンション工法は、ＰＣ
鋼材を直接コンクリート内に埋め込むため、ＰＣ鋼材が
防錆被覆のものからなる場合、コンクリートと防錆被覆
層がじかに接触し、その付着力が重要な問題になってく
る。However, this pretensioning method is
Since the steel material is directly embedded in the concrete, when the PC steel material has a rust preventive coating, the concrete and the rust preventive coating layer come into direct contact with each other, and the adhesive force thereof becomes an important problem.
【０００４】しかるに、合成樹脂材料による防錆被覆の
加工を施した鋼撚線の場合は、図６の如く、被覆層外郭
Ｃの凹部となる螺旋状溝形部分Ｃｄが滑らかになり、表
面積が小さくなってしまう傾向がある。しかし、凹部と
なるこの溝形部分Ｃｄが、実はコンクリートが入り込ん
で付着力を保つための主要部であり、ここにコンクリー
トが入り込めないと付着力の低下を招く一因ともなる。
鋼棒の場合は凹部がなく付着力が低いのは云うまでもな
い。However, in the case of a steel twisted wire coated with a rust preventive coating made of a synthetic resin material, as shown in FIG. 6, the spiral groove portion Cd, which is the recess of the coating layer outer shell C, becomes smooth and the surface area is It tends to become smaller. However, this groove-shaped portion Cd, which becomes the concave portion, is actually the main part for the concrete to enter and maintain the adhesive force, and if concrete does not enter here, it also causes a decrease in the adhesive force.
Needless to say, a steel rod has no recess and has a low adhesive force.
【０００５】そして何よりも、防錆被覆のＰＣ鋼材は、
溶融合成樹脂の固化による平滑性の表面が、コンクリー
トとの付着力を悪くし、これが最大の欠点となってい
る。And above all, PC steel with anticorrosion coating is
The smooth surface due to the solidification of the molten synthetic resin deteriorates the adhesion to concrete, which is the biggest drawback.
【０００６】[0006]
【発明が解決しようとする課題】上記の事情に鑑み、本
発明は、コンクリートとの付着力を改善した防錆被覆の
ＰＣ鋼材とその製造方法の提供を目的とするものであ
る。SUMMARY OF THE INVENTION In view of the above circumstances, the present invention has as its object to provide a rust-preventive coated PC steel material having improved adhesion to concrete and a method for producing the same.
【０００７】[0007]
【課題を解決するための手段】本発明は、上記目的を達
成するために、防錆被覆したＰＣ用鋼撚線又は鋼棒から
なるＰＣ鋼材において、該ＰＣ鋼材の全周に、熱可塑性
樹脂からなる防錆被覆層を密着形成し、その表面に規則
正しい熱可塑性樹脂からなる螺旋状の凸条を一体形成さ
せた防錆被覆のＰＣ鋼材を構成するものであり、また、
ＰＣ鋼撚線及び鋼棒からなるＰＣ鋼材に、押出機で熱可
塑性樹脂を溶融して被覆する工程と、その表面にもう一
台の補助押出機で、熱可塑性樹脂からなる螺旋状の凸条
を一体形成する工程とにより、ＰＣ鋼材の表面に、熱可
塑性樹脂からなる規則正しい螺旋状の凸条模様を形成さ
せた、防錆被覆のＰＣ鋼材の製造方法を構成するもので
ある。In order to achieve the above object, the present invention provides a PC steel material comprising a steel stranded wire for PC or a steel rod coated with anticorrosion, wherein a thermoplastic resin is provided on the entire circumference of the PC steel material. A rustproof coating PC steel material is formed by closely forming a rustproof coating layer made of, and integrally forming a spiral ridge made of a regular thermoplastic resin on the surface thereof.
A process of melting and coating a thermoplastic resin on a PC steel material consisting of PC steel stranded wire and steel rod with an extruder, and another auxiliary extruder on the surface of which is a spiral convex strip made of a thermoplastic resin. By the step of integrally forming the above, a method for producing an anticorrosion-coated PC steel material, in which a regular spiral convex pattern made of a thermoplastic resin is formed on the surface of the PC steel material.
【０００８】[0008]
【作 用】本発明は、上記のように構成したので、Ｐ
Ｃ鋼材の防錆被覆が、熱可塑性樹脂の被覆層の表面に熱
可塑性樹脂からなる規則正しい螺旋状の凸条を形成させ
たので、コンクリートとの付着力の良い防錆被覆のＰＣ
鋼材が得られた。[Operation] Since the present invention is configured as described above, P
Since the rust preventive coating of C steel material forms regular spiral ridges made of thermoplastic resin on the surface of the coating layer of thermoplastic resin, PC of rust preventive coating with good adhesion to concrete
A steel material was obtained.
【０００９】本発明は、防錆被覆層と、螺旋状の凸条を
溶融状態で一体形成したため、凸部が、完全に接着状態
に形成させることが出来た。その為、より強固なコンク
リートとの付着力が得られた。本発明の防錆被覆のＰＣ
鋼材は、螺旋状の凸条形成が、押出機による工程であ
り、現在の加工ラインに組込んで製造することができ
た。According to the present invention, since the rust preventive coating layer and the spiral ridge are integrally formed in a molten state, the ridge can be formed in a completely adhered state. Therefore, a stronger adhesive force with concrete was obtained. PC of the anticorrosion coating of the present invention
For the steel material, the spiral ridge formation is a process using an extruder, and it could be manufactured by incorporating it into the current processing line.
【００１０】[0010]
【実施例】以下、本発明の実施例に基づいて、さらに詳
しく説明する。図１は、本発明の一実施例を示す防錆被
覆のＰＣ鋼材の略示側面図であり、図２は、ＰＣ鋼撚線
の場合の断面図、図３はＰＣ鋼棒の場合の断面図で、図
４は、図１の防錆被覆のＰＣ鋼材の製造方法を示す略示
側面図である。The present invention will now be described in more detail based on the embodiments of the present invention. FIG. 1 is a schematic side view of an anticorrosion-coated PC steel material showing an embodiment of the present invention, FIG. 2 is a sectional view in the case of a PC steel twisted wire, and FIG. 3 is a sectional view in the case of a PC steel rod. In the figure, FIG. 4 is a schematic side view showing a method for producing the PC steel material of the rust-proof coating of FIG. 1.
【００１１】図４に示すように、ＰＣ鋼材のコイル１を
繰り出し装置２に乗せて、ＰＣ鋼材３を連続して繰り出
し、制動装置４を経て加熱装置５にて加熱後、押出成形
機６のクロスヘッド７に導入される。ここで先導ワイヤ
ー（図示せず）にジョイントさせ、先導ワイヤーは、引
取装置８で先導ワイヤー用巻取装置９の先導ワイヤー用
リール１０に巻取ってしまう。As shown in FIG. 4, the coil 1 of PC steel material is placed on the feeding device 2, the PC steel material 3 is continuously fed, heated by the heating device 5 via the braking device 4, and then the extruder 6 is pressed. It is introduced into the crosshead 7. Here, the leading wire (not shown) is jointed, and the leading wire is wound around the leading wire reel 10 of the leading wire winding device 9 by the take-up device 8.
【００１２】押出成形機６では、ポリエチレン樹脂また
は塩化ビニール樹脂等からなる熱可塑性樹脂を１７０℃
程度で加熱溶融して、ＰＣ鋼材の表面に、まず、防錆の
被覆層１１を形成させる。In the extruder 6, a thermoplastic resin such as polyethylene resin or vinyl chloride resin is heated to 170 ° C.
First, the rust-proof coating layer 11 is formed on the surface of the PC steel material by heating and melting.
【００１３】次に、この被覆層１１が押出成形機６で形
成された直後の、１５０℃乃至１７０℃の高温状態で、
未だ被覆層１１の表面が冷却されていない間に、押出成
形機６の次に配置されている補助押出機１２のヘッド１
３を通される。ここでは、補助押出機１２で加熱溶融さ
れたポリエチレン樹脂または塩化ビニール樹脂からなる
熱可塑性樹脂が、ヘッド１３から図２及び図３の凸条部
分の大きさ（Ｄ×Ｈ）で押し出される。この時、螺旋状
形成用の回転ダイス１４を一定速度で、回転させること
によって、螺旋状凸条１５を規則正しく接着形成するこ
とが出来る。また、この螺旋ピッチ（図１のＰ）は、回
転ダイス１４の回転速度が自由に調整可能となってお
り、任意に決めることが出来るし、凸条部分１５の大き
さもヘッド１３の出口の構造で任意に決定出来る。ま
た、図７に示すように、補助押出機１２の次ぎに他の補
助押出機２１を配置し、そのヘッド２２に被覆層１１を
通し、回転ダイス１４の回転方向と逆方向に回転ダイス
２３を回転させることにより補助押出機１２で加熱溶融
されたポリエチレン樹脂または塩化ビニール樹脂からな
る熱可塑性樹脂が、ヘッド２２から図８、図９及び図１
０に示すように、螺旋状凸条１５と交差する凸条部分２
４を規則正しく接着形成することもできる。Next, immediately after the coating layer 11 is formed by the extruder 6, at a high temperature of 150 to 170 ° C.,
The head 1 of the auxiliary extruder 12 arranged next to the extruder 6 while the surface of the coating layer 11 is not yet cooled.
3 is passed. Here, a thermoplastic resin made of polyethylene resin or vinyl chloride resin that has been heated and melted by the auxiliary extruder 12 is extruded from the head 13 in the size (D × H) of the ridge portion in FIGS. 2 and 3. At this time, by rotating the rotary die 14 for forming a spiral at a constant speed, the spiral protrusions 15 can be regularly bonded and formed. Further, this spiral pitch (P in FIG. 1) can freely adjust the rotational speed of the rotary die 14 and can be arbitrarily determined, and the size of the protruding portion 15 can be the structure of the outlet of the head 13. Can be arbitrarily determined with. Further, as shown in FIG. 7, another auxiliary extruder 21 is arranged next to the auxiliary extruder 12, the coating layer 11 is passed through the head 22 of the auxiliary extruder 21, and the rotary die 23 is rotated in the direction opposite to the rotation direction of the rotary die 14. The thermoplastic resin made of polyethylene resin or vinyl chloride resin, which is heated and melted by the auxiliary extruder 12 by rotating, is fed from the head 22 to FIG. 8, FIG. 9 and FIG.
As shown in 0, the ridge portion 2 that intersects the spiral ridge 15
It is also possible to form a regular adhesive bond.
【００１４】そして、冷却装置１６で冷却されたＰＣ鋼
材３は、被覆層１１の表面に規則正しい螺旋状の凸条部
分１５を有した防錆被覆が形成される。このようにして
製造された本発明の防錆被覆のＰＣ鋼撚線１７あるいは
ＰＣ鋼棒１８は、巻取装置１９によりリール２０に巻き
取られる。Then, the PC steel material 3 cooled by the cooling device 16 is provided with a rustproof coating having regular spiral ridge portions 15 on the surface of the coating layer 11. The anticorrosion-coated PC steel twisted wire 17 or PC steel rod 18 of the present invention thus manufactured is wound around the reel 20 by the winding device 19.
【００１５】このようにして製造されたＰＣ鋼材３から
なる防錆被覆のＰＣ鋼撚線１７、ＰＣ鋼棒１８は、防錆
被覆により、平滑となった表面に、凸条部分１５が完全
に溶融状態で接着形成され、これがコンクリートとの付
着力に寄与しうるものとなった。The anticorrosion-coated PC steel stranded wire 17 and the PC steel rod 18 made of the PC steel material 3 produced in this manner have the ridges 15 completely on the smoothed surface by the anticorrosion coating. Adhesion was formed in the molten state, which could contribute to the adhesive force with concrete.
【００１６】次に、最初の実施例の方法によって製造さ
れた防錆被覆のＰＣ鋼材からなる本発明品を、従来の比
較品と対比して試験した。試料は、ともにＳＷＰＲ７Ｂ
からなるＰＣ鋼撚線の表面に、ポリエチレン樹脂からな
る熱可塑性樹脂の被覆層３００μｍの表面に、ポレエチ
レン樹脂からなる熱可塑性樹脂の螺旋状凸状を一体形成
させたものを使用した。（その凸条部分の大きさは、Ｄ
×Ｈが３．０ｍｍ×１．５ｍｍ 螺旋ピッチが２５ｍｍ
である）Next, the product of the present invention made of a PC steel material with an anticorrosion coating manufactured by the method of the first embodiment was tested in comparison with a conventional comparative product. Both samples are SWPR7B
The surface of the PC steel stranded wire made of was formed by integrally forming a spiral convex shape of a thermoplastic resin made of polyethylene resin on the surface of a coating layer 300 μm of a thermoplastic resin made of polyethylene resin. (The size of the ridge is D
XH is 3.0 mm x 1.5 mm Spiral pitch is 25 mm
Is)
【００１７】また比較品は、ＰＣ鋼撚線の表面に、ポリ
エチレン樹脂からなる熱可塑性樹脂の３００μｍ厚の被
覆層だけのものを使用した。As a comparative product, only a 300 μm thick coating layer of a thermoplastic resin made of polyethylene resin was used on the surface of PC steel stranded wire.
【００１８】試験は、防錆被覆のＰＣ鋼材をジャッキに
て引張り荷重をかけ、コンクリートを打設し、コンクリ
ートの圧縮強度が３００ｋｇｆ／ｃｍ2 以上になって固
まった後、ジャッキを除々にゆるめ、防錆被覆のＰＣ鋼
材が縮み、コンクリート供試体に応力が導入される状態
を、コンクリート供試体の表面に貼り付けた歪ゲージで
測定した。その結果は、図５のグラフに示す。In the test, a rust-proof coated PC steel material was subjected to a tensile load with a jack to pour concrete, and after the concrete had a compressive strength of 300 kgf / cm 2 or more and solidified, the jack was gradually loosened. The state in which the rust-proof coated PC steel material contracted and stress was introduced into the concrete specimen was measured with a strain gauge attached to the surface of the concrete specimen. The results are shown in the graph of FIG.
【００１９】本発明品は、比較品と比べれば高い値を示
し、比較品よりコンクリートとの付着力が大きくなっ
た。The product of the present invention showed a higher value than the comparative product, and the adhesive force to the concrete was larger than that of the comparative product.
【００２０】[0020]
【発明の効果】本発明の防錆被覆のＰＣ鋼材は、熱可塑
性樹脂の被覆層の表面に、熱可塑性樹脂による螺旋条凸
条を形成させたので、コンクリートとの付着力が大きく
改善された。INDUSTRIAL APPLICABILITY The anticorrosion-coated PC steel material according to the present invention has a spiral-shaped ridge formed of a thermoplastic resin formed on the surface of the coating layer of the thermoplastic resin, so that the adhesive force to concrete is greatly improved. .
【００２１】本発明品は、コンクリートとの付着力が大
きくなったので、プレストレストコンクリート工法に使
用する場合、その付着長を短くすることができるように
なった。Since the product of the present invention has a large adhesive force with concrete, when used in the prestressed concrete construction method, the adhesive length can be shortened.
【００２２】本発明の製造方法は、もう一台の押出機に
よる工程を加えるだけなので、現在の加工ラインに簡単
に、経済的に組み込むことができた。The manufacturing method of the present invention can be easily and economically incorporated into the current processing line because it only requires the addition of another extruder.
【図１】本発明の一実施例を示す防錆被覆のＰＣ鋼材の
略示側面図である。FIG. 1 is a schematic side view of an anticorrosion-coated PC steel material showing an embodiment of the present invention.
【図２】本発明の一実施例を示す防錆被覆のＰＣ鋼撚線
からなる鋼材の断面図である。FIG. 2 is a cross-sectional view of a steel material made of a rust-proof PC steel stranded wire showing an embodiment of the present invention.
【図３】本発明の一実施例を示す防錆被覆のＰＣ鋼棒か
らなる鋼材の断面図である。FIG. 3 is a cross-sectional view of a steel material made of a PC steel rod having an anticorrosion coating showing an embodiment of the present invention.
【図４】本発明の防錆被覆のＰＣ鋼材の製造方法を示す
略示側面図である。FIG. 4 is a schematic side view showing a method for producing a PC steel material having a rust preventive coating according to the present invention.
【図５】本発明品と比較品を対比試験した結果を示す供
試体端部からの距離に対するプレストレス導入量のグラ
フである。FIG. 5 is a graph showing the amount of prestress introduced with respect to the distance from the end of the test piece, showing the results of comparison tests of the present invention product and the comparative product.
【図６】従来の防錆被覆鋼撚線からなる鋼材の断面図で
ある。FIG. 6 is a cross-sectional view of a steel material including a conventional rustproof coated steel stranded wire.
【図７】本発明の他の実施例を示す防錆被覆のＰＣ鋼材
の製造方法を示す略示側面図である。FIG. 7 is a schematic side view showing a method for producing a PC steel material with a rust preventive coating showing another embodiment of the present invention.
【図８】本発明の他の実施例を示す防錆被覆のＰＣ鋼材
の略示側面図である。FIG. 8 is a schematic side view of a rustproof coated PC steel material showing another embodiment of the present invention.
【図９】本発明の他の実施例を示す防錆被覆のＰＣ鋼撚
線からなる鋼材の断面図である。FIG. 9 is a cross-sectional view of a steel material made of PC steel stranded wire with a rust preventive coating showing another embodiment of the present invention.
【図１０】本発明の他の実施例を示す防錆被覆のＰＣ鋼
棒からなる鋼材の断面図である。FIG. 10 is a cross-sectional view of a steel material made of a PC steel rod having a rust preventive coating showing another embodiment of the present invention.
３ ＰＣ鋼材 ６ 被覆層を形成させる押出機 １１ 熱可塑性樹脂からなる被覆層 １２ 螺旋状凸条を形成させる補助押出機 １３ ヘッド １４ 回転ダイス １５ 螺旋状凸条部分 １７ 請求項１の防錆被覆のＰＣ鋼撚線 １８ 請求項２の防錆被覆のＰＣ鋼棒 ２１ 螺旋状凸条を形成させる他の補助押出機 ２２ ヘッド ２３ 回転ダイス ２４ 螺旋状凸条部分 3 PC Steel 6 Extruder for forming coating layer 11 Coating layer made of thermoplastic resin 12 Auxiliary extruder for forming spiral convex strip 13 Head 14 Rotating die 15 Spiral convex strip portion 17 Corrosion preventive coating of claim 1 PC steel stranded wire 18 PC steel rod of rust-proof coating according to claim 2 21 Other auxiliary extruder for forming spiral ridges 22 Head 23 Rotary die 24 Spiral ridge portion
Claims (3)
ＰＣストランドにおいて、ＰＣストランドを加熱しなが
ら、熱可塑性樹脂からなる防錆被覆層を該ＰＣストラン
ドの全周に密着形成し、その表面に規則正しい熱可塑性
樹脂からなる螺旋状の凸条を一体形成させたことを特徴
とする防錆被覆のＰＣ鋼撚線。1. A PC strand in which a plurality of side wires are twisted around the outer circumference of a core wire, while the PC strand is being heated, an anticorrosive coating layer made of a thermoplastic resin is formed in close contact with the entire circumference of the PC strand. A rustproof coated PC steel stranded wire, characterized in that a spiral ridge made of regular thermoplastic resin is integrally formed on the surface.
がら熱可塑性樹脂からなる防錆被覆層を該ＰＣ鋼棒の全
周に密着形成し、その表面に規則正しい熱可塑性樹脂か
らなる螺旋状の凸条を一体形成させたことを特徴とする
防錆被覆のＰＣ鋼棒。2. A PC steel rod, in which a rust preventive coating layer made of a thermoplastic resin is adhered and formed on the entire circumference of the PC steel rod while heating the PC steel rod, and a spiral shape made of a regular thermoplastic resin is formed on the surface thereof. Rust-proof coated PC steel rod characterized by integrally forming the ridges of.
加熱しながら押出成形機に導入する工程と、押出成形機
で熱可塑性樹脂を溶融して被覆する工程と、もう一台の
押出成形機で速度に応じて規則正しい螺旋状の凸条模様
を被覆層の表面に形成させる工程とからなることを特徴
とする防錆被覆のＰＣ鋼材の製造方法。3. A step of introducing a PC steel material consisting of a PC steel twisted wire or a steel rod into an extruder while heating, a step of melting and coating a thermoplastic resin in the extruder, and another extrusion. A method for producing a PC steel material with a rust preventive coating, comprising the step of forming a regular spiral convex pattern on the surface of the coating layer with a molding machine according to the speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5174627A JPH06192980A (en) | 1992-10-27 | 1993-06-23 | Prestressing steel strand and prestressing steel bar, having rust preventing coating and excellent in adhesion and production thereof |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4-310794 | 1992-10-27 | ||
| JP31079492 | 1992-10-27 | ||
| JP5174627A JPH06192980A (en) | 1992-10-27 | 1993-06-23 | Prestressing steel strand and prestressing steel bar, having rust preventing coating and excellent in adhesion and production thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06192980A true JPH06192980A (en) | 1994-07-12 |
Family
ID=26496174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5174627A Pending JPH06192980A (en) | 1992-10-27 | 1993-06-23 | Prestressing steel strand and prestressing steel bar, having rust preventing coating and excellent in adhesion and production thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06192980A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100356313B1 (en) * | 2000-06-30 | 2002-10-12 | 고려제강 주식회사 | Streel strand for prestressed concrete using indented wire and device for manufacturing the same |
| GB2499510A (en) * | 2012-01-31 | 2013-08-21 | Bridon Ltd | Anti-vibration Sheathing for Cables |
| CN111560781A (en) * | 2020-06-12 | 2020-08-21 | 宁波凯特机械有限公司 | Offline injection-coated steel wire rope production line equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01190861A (en) * | 1988-01-26 | 1989-07-31 | Shinko Kosen Kogyo Kk | Tension member for structure |
| JPH03218817A (en) * | 1989-11-02 | 1991-09-26 | Nippon Petrochem Co Ltd | Fiber reinforced plastic rod with ridge on surface and its manufacture |
-
1993
- 1993-06-23 JP JP5174627A patent/JPH06192980A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01190861A (en) * | 1988-01-26 | 1989-07-31 | Shinko Kosen Kogyo Kk | Tension member for structure |
| JPH03218817A (en) * | 1989-11-02 | 1991-09-26 | Nippon Petrochem Co Ltd | Fiber reinforced plastic rod with ridge on surface and its manufacture |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100356313B1 (en) * | 2000-06-30 | 2002-10-12 | 고려제강 주식회사 | Streel strand for prestressed concrete using indented wire and device for manufacturing the same |
| GB2499510A (en) * | 2012-01-31 | 2013-08-21 | Bridon Ltd | Anti-vibration Sheathing for Cables |
| GB2499510B (en) * | 2012-01-31 | 2016-01-13 | Bridon Ltd | Anti-vibration sheathing for cables |
| CN111560781A (en) * | 2020-06-12 | 2020-08-21 | 宁波凯特机械有限公司 | Offline injection-coated steel wire rope production line equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3532783A (en) | Method of molding bonded messenger cable | |
| US5618065A (en) | Electric welding pipe joint having a two layer outer member | |
| JPH06192980A (en) | Prestressing steel strand and prestressing steel bar, having rust preventing coating and excellent in adhesion and production thereof | |
| JPH086267B2 (en) | Anticorrosion-coated PC steel stranded wire and PC steel rod, and method for producing the same | |
| US5670208A (en) | PC stand coated with rust inhibitor and method thereof | |
| JP2524553B2 (en) | Method for manufacturing anti-corrosion coated variant PC steel rod | |
| JP2761522B2 (en) | Processing method of high adhesion rust-proof coated PC strand | |
| JP3861209B2 (en) | Method for processing unbonded PC strand with anti-corrosion coating having high adhesion | |
| JPH0726347B2 (en) | Method for producing anticorrosion coated PC strand | |
| JP2691509B2 (en) | Manufacturing method of anticorrosion coated PC strand with spiral groove | |
| US4229238A (en) | Process for manufacturing coaxial cable | |
| JP3350829B2 (en) | Rust prevention coated PC strand and its rust prevention processing method | |
| JPH06187851A (en) | Manufacture of fiber-reinforced composite wire for overhead power transmission line and device therefor | |
| JPH11172587A (en) | Raw material strand and production of raw material strand | |
| JP2909470B2 (en) | Processing method of high adhesion rust prevention coated PC steel | |
| JP2759166B2 (en) | Method for producing rust-proof coated PC strand | |
| JP3347213B2 (en) | Method of forming H-shaped slot rod for optical fiber cable | |
| JPH072256B2 (en) | Method for producing anticorrosion coated PC strand | |
| JPH07238482A (en) | Rustproof coated pc strand and its processing | |
| JPS6318311A (en) | Manufacture of spacer for carrying optical fiber | |
| JPH0753044Y2 (en) | Spacer for supporting optical fiber having spiral grooves that are alternately inverted | |
| JPH04241182A (en) | Antirust coated pc wire and production thereof | |
| JPH08170405A (en) | Pc steel wire with rust preventive coating well-adhesive to concrete and its manufacture | |
| JPS5935685B2 (en) | Manufacturing method for composite material with irregularly shaped reinforcing core | |
| JPH11200265A (en) | Production of rust preventing pc strand |