JP3684124B2 - Deformed wire rod - Google Patents

Deformed wire rod Download PDF

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Publication number
JP3684124B2
JP3684124B2 JP37406199A JP37406199A JP3684124B2 JP 3684124 B2 JP3684124 B2 JP 3684124B2 JP 37406199 A JP37406199 A JP 37406199A JP 37406199 A JP37406199 A JP 37406199A JP 3684124 B2 JP3684124 B2 JP 3684124B2
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Japan
Prior art keywords
surface area
concrete
wire rod
deformed
wire
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JP37406199A
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Japanese (ja)
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JP2001182219A (en
Inventor
広美 荒巻
芳久 大津
順一 児玉
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Nippon Steel Corp
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Nippon Steel Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、コンクリートヒューム管、側溝、コンクリートパイル、コンクリートポール等のコンクリート製品及びコンクリート建築用構造物の補強線に用いられる異形線条材に関するものである。
【0002】
【従来の技術】
コンクリートヒューム管、側溝、コンクリートパイル、コンクリートポール等のコンクリート製品及びコンクリート建築用構造物の補強線には、丸鉄線や異形断面を有する異形線条材が用いられている。異形線条材の一般的な形態は、線条材外周面に周方向に突出する各種形状の突起(横リブ)と、長手方向に突出する各種形状の突起(縦リブ)の一方或は双方を有するものが知られている。
【0003】
コンクリート製品やコンクリート建築用構造物を製造するには、補強線としての異形線条材をコンクリート製品やコンクリート建築用構造物に類似した形状に曲げ加工し、溶接や成形した後、型枠にセットする。その後、コンクリート及び建築素材を型枠に流し込んでコンクリート製品やコンクリート建築用構造物とされる。
【0004】
このような補強線に用いられる丸鉄線や異形線条材は、通常、熱間圧延した後に、冷間で伸線加工や異形加工(インデント加工)を行うことによって製造されている。
【0005】
例えば、特開平6−31368号公報においては、線条材のインデント加工方法として、複数のインデント1a、1b、1c、1dにより線条材の周囲に周方向Y及び長さ方向Xの間隔を置き圧痕付けして、複数の圧痕列a1、b1、c1、d1を付設するとともに、各圧痕列の圧痕を、線条材の右廻り、対面側、左廻り及び対面側の順序で、または左廻り、対面側、右廻り及び対面側の順序でかつ同線条材の長さ方向に位相をずらし、順次に圧痕付けする方法が開示されている。
【0006】
しかしながら、このような異形例えばインデント状の溝を冷間加工する場合は、凹みの深さがあまり大きく取れず比表面積を大きくするにも限界がある。また、冷間加工のため加工負荷が大きくなるため加工コストも大きくなるという問題点がある。
【0007】
また、コンクリート製品及び建築用構造物の変形時の強度を高めるために配筋される細径(公称直径6.35mm未満)の補強線としては、一般に丸鉄線が主として使用されていて、異形線条材はあまり使用されていない。なぜならば、細径線材は、冷間で細いダイスの孔を通して細くする伸線加工で製造するのが一般的で、異形線条材は伸線加工で製造することが困難であるからである。
【0008】
【発明が解決しようとする課題】
本発明は、上記問題点を解決すべくなしたもので、コンクリート製品及びコンクリート建築用構造物の変形時の強度を高めるために配筋される補強線として、従来の冷間加工(伸線、異形加工)を省略し、高強度のコンクリート製品及びコンクリート建築用構造物とすることができる公称直径6.35mm未満の溶接性に優れた異形線条材を提供することを目的とする。
【0009】
【課題を解決するための手段】
本発明者は、細径の異形線材を冷間加工(異形加工)によって製造しようとすると、凹みの深さがあまり取れず比表面積を大きくするにも限界があることに鑑み、冷間加工を省略し、熱間加工によって直接細径(公称直径6.35mm未満)の異形線条材を製造することを研究した。
【0010】
その結果、熱間加工によって製造すると、冷間加工に比較して凹みの深さを大きく、またリブ高さを大きくとることができ、体積当たりの表面積である比表面積を大きくすることができること、特に、図1に示すように、異形線条材の細い線径のもの程、比表面積が大きくなるので、丸鉄線と比べた場合、コンクリートとの付着強度が大きくなることを知見した。
【0011】
本発明は、上記知見に基づいて完成したもので、その発明の要旨は以下の通りである。
【0012】
(1) 熱間圧延にて製造した、公称直径6.35mm未満で、表面の長手方向に連続して凸状または凹状の形状を形成し、凸部表面の外周の表面積が、凸部表面積と凹部表面積とその間の溝の表面積をすべて合計した全表面積の20%〜80%であることを特徴とする異形線条材。
【0016】
(2) 上記(1)記載の異形線条材を補強線として用いたことを特徴とするコンクリート製品或はコンクリート建築用構造物。
【0017】
【発明の実施の形態】
細径(公称直径6.35mm未満)の異形線条材を熱間圧延で製造しようとすると高速圧延が必要となる。ところが、細径線材は剛性が弱いため高速圧延では座屈変形し、通材トラブルが発生する。
【0018】
このため、熱間圧延により細径の異形線条材を製造することはこれまでなされていなかった。即ち、従来は細い線材は、熱間圧延後に、細いダイスの孔を通して細くする冷間の伸線加工により製造するのが一般的であった。
【0019】
本発明者は、細いボア径の水冷ゾーン、張力制御や高速で巻き取るレイングヘッド等を用いることにより、公称直径6.35mm未満の細径の異形線条材の熱間圧延による製造が可能となることを確認した。
【0020】
そして、熱間圧延にあたっては、高温の鋼材を楕円形の断面形状をもった製品の凹状形状と逆の凸状形状を有するカリバーを持つ一対の仕上げロール間を通材圧延成形することにより異形線条材を製造することができた。
【0021】
更に、熱間圧延によって製造した細径の異形線条材は、異形加工等の冷間加工材よりも凹みの深さを大きく、また、リブの高さを大きくすることができ、体積当たりの表面積である比表面積を大きくとることができることを見出した。
【0022】
図1は、線径と比表面積の関係を示す図である。図1においては、丸鉄線、公称直径6.35mm〜16mmの熱間圧延異形線条材及び公称直径6.35mm未満の熱間圧延異形線条材(本発明)についての比表面積を比較して示してある。
【0023】
図1から明らかなように、熱間圧延異形線条材は、表面に凹凸があるため丸鉄線と比べて体積当たりの表面積である比表面積が大きく取れる。そして、熱間圧延異形線条材は、細い線径のもの程比表面積が大きい。例えば、線径が10〜13mmのものよりも、線径が4〜6mmのものの方が約3倍比表面積が大きいものとなることが分かる。
【0024】
そして、コンクリート製品(コンクリート建築用構造物)の補強筋としての異形線条材は、コンクリート製品に類似した形状に曲げ加工され、溶接や成形を施される。その後、型枠にセットされ、コンクリートを型枠に流し込んでコンクリート製品が得られている。このため、コンクリート製品の強度を高めるための一つの重要な要件として、異形線条材とコンクリートとの付着強度の高いことが要求される。
【0025】
本発明の公称直径6.35mm未満、特に公称直径4〜6mmの熱間圧延により製造した細径異形線条材は、図1に示すように、丸鉄線に比較して体積当たりの表面積の比表面積が大きく、コンクリートとの付着強度が大幅に改善される。したがって、本発明では、異形線条材の公称直径を6.35mm未満と限定した。なお、公称直径の下限は、特に限定するものでないが、製造条件や実用性の観点から3mmとすることが好ましい。
【0026】
次に、異形線条材をコンクリート製品に類似した形状に曲げ加工し溶接、成形する工程において必要なことは、曲げ加工性が良いこと、及び溶接性が良いことである。
【0027】
このためには、異形線条材の外周の形をほぼ円形とし、全表面積に対して外周の表面積を大きくする必要がある。外面がほぼ円形で凹みをもったインデント線の方が曲げ角度のバラツキは少なく、曲げ加工性は良い。溶接強度を高くするには、溶接部の接触面積が大きい方が良い。全表面積に対して外周の表面積が大きい程溶接面積も大きくなり溶接強度も高くなる。インデント線は、外面がほぼ円形で凹みをもっているので、広い面積を持つ外面で溶接されるので溶接面積は大きく取れ、しかもそのバラツキは少ない。
【0028】
図2は、本発明の表面の長手方向に連続して凸状または凹状の形状を有する異形線条材の実施例を示す図で、(a)は正面図、(b)は平面図、(c)はA−A断面図、そして(d)は側面図である。
【0029】
図2に示すように、異形線条材1は、表面の軸線2方向に連続して凸状の突起(横リブ)3と凹状の溝4とを有し、軸線方向に2本の凸状の突起(縦リブ)5を有する形状となっている。そして、横リブと軸線の角度6は、60度で形成してある。この角度はコンクリート製品の張力方向に応じて30〜90度の範囲で任意に変更できる。
【0030】
このように、表面の長手方向に連続して凹状または凸状の形状を形成することにより、コンクリートとの付着力を向上させることができる。
【0031】
更に、異形線条材の全表面積に対する外周の表面積がコンクリートとの付着力に影響がある。そこで、JIS A 1132に規定されたコンクリート養生法により埋設された異形線条材を、JIS B 7721に従う引き抜き試験を行った。
【0032】
図3は、異形線条材の外周表面積の全表面に対する比率(%)と平均付着力(N/mm2)との関係を示す図である。
【0033】
図3に示すように、異形線条材の外周表面積が全表面積の20〜80%であると、平均付着力(N/mm2)が非常に高いことが分かった。
【0034】
したがって、本発明(請求項4)では、外周の表面積が全表面積の20〜80%と限定した。
【0035】
コンクリートの補強筋として、本発明の異形線条材を用いると、線径を小さくしてコンクリート製品及びコンクリート建築用構造物の破壊強度を確保することが可能となる。そのため、配筋量の低減及び製品の軽量化を図ることができる。
【0036】
【実施例】
表1に示すように、線径4mmφの丸鉄線(熱間圧延材と伸線材)と図2に示すような本発明の公称直径4mmの異形線条材(熱間圧延材)とを、主筋のラセン筋及び補助筋の直線筋として用いコンクリート製品を製造した。そして、コンクリート製品の上部より荷重を加えた時のたわみ量を調査した。その結果を表2に示す。
【0037】
【表1】

Figure 0003684124
【0038】
表2に示すように、本発明の熱間圧延材である異形線条材を使用したコンクリート製品(本発明1及び2)は、熱間圧延材或は伸線材である丸鉄線を使用したコンクリート製品(比較例1及び2)に比較して、コンクリートのひび割れ荷重(コンクリートにひび割れが発生しはじめた時の荷重をいう)及び破壊荷重(コンクリートが破壊した時の荷重をいう)が高いことが確認できた。
【0039】
【表2】
Figure 0003684124
【0040】
更に、公称直径4mmの異形線条材(熱間圧延材)のコンクリートとの付着力を調査するため、JIS A 1132に規定されたコンクリート養生法により埋設された異形線条材を、JIS B 7721の引き抜き試験を行った。その結果を表3に示す。
【0041】
表3から明らかなように、外周の表面積が全表面積の20〜80%の範囲が平均付着力(N/mm2)の値がほぼ同等の高い値の範囲となっていた。
【0042】
丸鉄線の平均付着力は、外周の表面積が全表面積の100%であるから、本発明の異形線条材の平均付着力は丸鉄線に比較して大幅に高いことが分かる。したがって、異形線条材は、外周の表面積を全表面積の20〜80%とすることが望ましいことが明らかになった。
【0043】
【表3】
Figure 0003684124
【0044】
【発明の効果】
本発明によれば、コンクリート管等のコンクリート製品の補強筋として、熱間圧延によって製造された異形線条材をそのまま使用するものであるから、従来のように冷間加工(伸線、異形加工)工程が省略でき、生産コスト低減が図られる。また、コンクリートとの付着力改善により、コンクリート製品の破壊強度が向上し、細い補強筋の使用が可能となるため、配筋量の低減及び製品の軽量化が可能となる。更に、比表面積が大きいため溶接部の面積が大きくなり、溶接強度向上が図られるという効果を奏する。
【図面の簡単な説明】
【図1】線径と比表面積の関係を示す図である。
【図2】本発明の表面の長手方向に連続して凸状または凹状の形状を有する異形線条材の実施例を示す図で、(a)は正面図、(b)は平面図、(c)はA−A断面図、そして(d)は側面図である。
【図3】異形線条材の外周表面積の全表面に対する比率(%)と平均付着力(N/mm2)との関係を示す図である。
【符号の説明】
1 異形線条材
2 軸線
3 横リブ
4 凹状の溝
5 縦リブ
6 横リブと軸線の角度[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a deformed filament material used for a reinforcing wire of a concrete product such as a concrete fume pipe, a side groove, a concrete pile, a concrete pole, or a concrete building structure.
[0002]
[Prior art]
For reinforcing wires of concrete products such as concrete fume pipes, gutters, concrete piles, concrete poles, and concrete building structures, round iron wires or deformed wire rods having deformed cross sections are used. The general form of the deformed wire rod is one or both of various shapes of protrusions (lateral ribs) protruding in the circumferential direction on the outer peripheral surface of the wire rod and various shapes of protrusions (vertical ribs) protruding in the longitudinal direction. Are known.
[0003]
To manufacture concrete products and concrete building structures, the deformed wire rod as a reinforcing wire is bent into a shape similar to concrete products and concrete building structures, welded and molded, and then set in a formwork To do. Thereafter, concrete and building materials are poured into a formwork to obtain a concrete product or a concrete building structure.
[0004]
A round iron wire or a deformed wire rod used for such a reinforcing wire is usually manufactured by hot-rolling and then cold-drawing or deforming (indenting).
[0005]
For example, in Japanese Patent Application Laid-Open No. 6-31368, as a method of indenting a filament material, a plurality of indents 1a, 1b, 1c, and 1d are used to place an interval in the circumferential direction Y and the length direction X around the filament material. Indentation is provided with a plurality of indentation rows a1, b1, c1, and d1, and the indentation in each indentation row is turned clockwise, facing side, counterclockwise and facing side of the wire rod or counterclockwise. A method is disclosed in which indentation is sequentially performed by shifting the phase in the order of facing side, clockwise rotation and facing side, and in the length direction of the same wire material.
[0006]
However, when such a deformed shape, for example, an indented groove, is cold worked, the depth of the recess is not so large, and there is a limit to increasing the specific surface area. In addition, there is a problem that the processing cost increases because the processing load increases due to cold processing.
[0007]
In addition, as a reinforcing wire with a small diameter (nominal diameter of less than 6.35 mm) that is arranged to increase the strength of concrete products and building structures during deformation, generally a round iron wire is mainly used. The strip is not used much. This is because thin wire rods are generally manufactured by a wire drawing process in which the wire rod is thinned through a thin die hole in a cold state, and deformed wire rods are difficult to manufacture by wire drawing.
[0008]
[Problems to be solved by the invention]
The present invention has been made in order to solve the above-described problems, and as a reinforcing wire to be reinforced to increase the strength at the time of deformation of a concrete product and a concrete building structure, conventional cold working (drawing, An object of the present invention is to provide a deformed wire rod excellent in weldability having a nominal diameter of less than 6.35 mm, which can be formed into a high-strength concrete product and a concrete building structure.
[0009]
[Means for Solving the Problems]
The present inventor, when trying to manufacture a deformed wire having a small diameter by cold working (deformed processing), cold working is performed in view of the fact that the depth of the dent is not so much and there is a limit to increase the specific surface area. Omitted and studied to manufacture deformed wire rods with a small diameter (nominal diameter of less than 6.35 mm) directly by hot working.
[0010]
As a result, when manufactured by hot working, the depth of the dent can be increased compared to cold working, the rib height can be increased, and the specific surface area per volume can be increased, In particular, as shown in FIG. 1, the thinner the deformed wire rod, the larger the specific surface area. Therefore, it has been found that the adhesion strength with concrete is increased when compared with a round iron wire.
[0011]
The present invention has been completed based on the above findings, and the gist of the present invention is as follows.
[0012]
(1) Produced by hot rolling, having a nominal diameter of less than 6.35 mm , continuously forming a convex or concave shape in the longitudinal direction of the surface, and the surface area of the outer periphery of the convex surface is the convex surface area A deformed wire rod having a total surface area of 20% to 80% of the total surface area of the recess surface area and the groove surface area therebetween .
[0016]
(2) A concrete product or a concrete building structure, wherein the deformed wire rod described in (1) is used as a reinforcing wire.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
High speed rolling is required to manufacture a deformed wire rod having a small diameter (nominal diameter of less than 6.35 mm) by hot rolling. However, since thin wire rods have low rigidity, they buckle and deform during high speed rolling, causing troubles in threading.
[0018]
For this reason, it has not been made so far to produce a thin deformed wire rod by hot rolling. That is, conventionally, a thin wire was generally manufactured by cold wire drawing after thinning through a hole of a thin die after hot rolling.
[0019]
By using a water cooling zone with a narrow bore diameter, a tension head, a laying head that winds at high speed, etc., the present inventor can manufacture a deformed wire rod having a nominal diameter of less than 6.35 mm by hot rolling. It was confirmed that
[0020]
And, in hot rolling, a deformed wire is formed by passing and rolling hot steel material between a pair of finish rolls having a caliber having a convex shape opposite to the concave shape of the product having an elliptical cross-sectional shape. The strip was able to be manufactured.
[0021]
Furthermore, the thin deformed wire rod produced by hot rolling can have a deeper dent depth and a higher rib height than a cold-worked material such as a deformed material. It has been found that the specific surface area, which is the surface area, can be increased.
[0022]
FIG. 1 is a diagram showing the relationship between the wire diameter and the specific surface area. In FIG. 1, specific surface areas of a round iron wire, a hot-rolled deformed wire with a nominal diameter of 6.35 mm to 16 mm, and a hot-rolled deformed wire with a nominal diameter of less than 6.35 mm (the present invention) are compared. It is shown.
[0023]
As apparent from FIG. 1, the hot-rolled irregularly shaped wire rod has irregularities on the surface, so that the specific surface area, which is the surface area per volume, can be larger than the round iron wire. And as for a hot-rolled irregular-shaped line material, the specific surface area is so large that a thin wire diameter is. For example, it can be seen that a wire having a diameter of 4 to 6 mm has a specific surface area approximately three times larger than that having a wire diameter of 10 to 13 mm.
[0024]
The deformed wire rod as the reinforcing bar of the concrete product (concrete building structure) is bent into a shape similar to that of the concrete product, and is subjected to welding and molding. After that, the concrete product is obtained by being set in a mold and pouring concrete into the mold. For this reason, as one important requirement for increasing the strength of the concrete product, it is required that the adhesion strength between the deformed wire rod and the concrete is high.
[0025]
As shown in FIG. 1, the thin irregular shaped wire rod produced by hot rolling with a nominal diameter of less than 6.35 mm, particularly with a nominal diameter of 4 to 6 mm according to the present invention has a surface area ratio per volume as compared with a round iron wire. The surface area is large, and the adhesion strength with concrete is greatly improved. Therefore, in the present invention, the nominal diameter of the deformed wire rod is limited to less than 6.35 mm. The lower limit of the nominal diameter is not particularly limited, but is preferably 3 mm from the viewpoint of manufacturing conditions and practicality.
[0026]
Next, what is necessary in the process of bending, welding, and forming a deformed wire rod into a shape similar to a concrete product is that bending workability is good and weldability is good.
[0027]
For this purpose, it is necessary to make the shape of the outer periphery of the deformed wire rod substantially circular and to increase the surface area of the outer periphery with respect to the total surface area. An indented wire with a substantially circular outer surface and a dent has less bending angle variation and has better bending workability. In order to increase the welding strength, it is better that the contact area of the welded portion is large. The larger the outer surface area relative to the total surface area, the larger the welding area and the higher the welding strength. Since the outer surface of the indented wire is substantially circular and has a dent, the indented wire is welded on the outer surface having a large area, so that the welding area can be increased and the variation is small.
[0028]
FIG. 2 is a view showing an example of a deformed wire rod having a convex or concave shape continuously in the longitudinal direction of the surface of the present invention, wherein (a) is a front view, (b) is a plan view, c) is an AA cross-sectional view, and (d) is a side view.
[0029]
As shown in FIG. 2, the deformed wire rod 1 has a convex protrusion (lateral rib) 3 and a concave groove 4 continuously in the direction of the surface axis 2, and two convex shapes in the axis direction. The projections (vertical ribs) 5 are formed. The angle 6 between the horizontal rib and the axis is 60 degrees. This angle can be arbitrarily changed in the range of 30 to 90 degrees depending on the tension direction of the concrete product.
[0030]
Thus, the adhesive force with concrete can be improved by forming a concave or convex shape continuously in the longitudinal direction of the surface.
[0031]
Furthermore, the surface area of the outer periphery with respect to the total surface area of a deformed filament material has influence on the adhesive force with concrete. Therefore, a drawing test according to JIS B 7721 was conducted on the deformed wire rods embedded by the concrete curing method defined in JIS A 1132.
[0032]
FIG. 3 is a diagram showing the relationship between the ratio (%) of the outer peripheral surface area of the deformed wire rod to the entire surface and the average adhesion force (N / mm 2 ).
[0033]
As shown in FIG. 3, it was found that the average adhesion (N / mm 2 ) was very high when the outer peripheral surface area of the deformed wire rod was 20 to 80% of the total surface area.
[0034]
Therefore, in the present invention (Claim 4), the outer peripheral surface area is limited to 20 to 80% of the total surface area.
[0035]
When the deformed wire rod of the present invention is used as a reinforcing bar for concrete, the wire diameter can be reduced to ensure the fracture strength of the concrete product and the concrete building structure. Therefore, the amount of bar arrangement can be reduced and the weight of the product can be reduced.
[0036]
【Example】
As shown in Table 1, a round bar wire (hot rolled material and wire drawn material) having a diameter of 4 mmφ and a deformed wire material (hot rolled material) having a nominal diameter of 4 mm according to the present invention as shown in FIG. A concrete product was produced using straight and auxiliary muscles. The amount of deflection when a load was applied from the top of the concrete product was investigated. The results are shown in Table 2.
[0037]
[Table 1]
Figure 0003684124
[0038]
As shown in Table 2, the concrete products using the deformed wire rod that is the hot rolled material of the present invention (the present inventions 1 and 2) are the concrete using the hot rolled material or the round iron wire that is the wire drawn material. Compared with the product (Comparative Examples 1 and 2), the crack load of concrete (referred to as the load when cracks begin to occur in concrete) and the fracture load (referred to as the load when concrete breaks) are higher. It could be confirmed.
[0039]
[Table 2]
Figure 0003684124
[0040]
Furthermore, in order to investigate the adhesion strength of the deformed wire rod (hot rolled material) with a nominal diameter of 4 mm to the concrete, the deformed wire rod embedded by the concrete curing method defined in JIS A 1132 is used as JIS B 7721. A pull-out test was conducted. The results are shown in Table 3.
[0041]
As is apparent from Table 3, the range of the outer peripheral surface area of 20 to 80% of the total surface area was a high value range in which the average adhesive force (N / mm 2 ) was almost equivalent.
[0042]
It can be seen that the average adhesion of the round wire is 100% of the total surface area of the outer peripheral surface, so that the average adhesion of the deformed wire rod of the present invention is significantly higher than that of the round wire. Therefore, it became clear that it is desirable that the irregular shaped wire rod has an outer peripheral surface area of 20 to 80% of the total surface area.
[0043]
[Table 3]
Figure 0003684124
[0044]
【The invention's effect】
According to the present invention, as a reinforcing bar for a concrete product such as a concrete pipe, the deformed wire rod produced by hot rolling is used as it is. ) The process can be omitted and the production cost can be reduced. In addition, by improving the adhesive strength with concrete, the fracture strength of the concrete product is improved and a thin reinforcing bar can be used, so the amount of bar arrangement can be reduced and the product can be reduced in weight. Furthermore, since the specific surface area is large, the area of the welded portion is increased, and the effect of improving the welding strength is achieved.
[Brief description of the drawings]
FIG. 1 is a diagram showing a relationship between a wire diameter and a specific surface area.
FIGS. 2A and 2B are diagrams showing an example of a deformed wire rod having a convex or concave shape continuously in the longitudinal direction of the surface of the present invention, wherein FIG. 2A is a front view, FIG. 2B is a plan view, c) is an AA cross-sectional view, and (d) is a side view.
FIG. 3 is a graph showing the relationship between the ratio (%) of the outer peripheral surface area of the deformed wire rod to the entire surface and the average adhesion force (N / mm 2 ).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Profile line material 2 Axis 3 Horizontal rib 4 Recessed groove 5 Vertical rib 6 Angle of horizontal rib and axis

Claims (2)

熱間圧延にて製造した、公称直径6.35mm未満で、表面の長手方向に連続して凸状または凹状の形状を形成し、凸部表面の外周の表面積が、凸部表面積と凹部表面積とその間の溝の表面積をすべて合計した全表面積の20%〜80%であることを特徴とする異形線条材。Produced by hot rolling, with a nominal diameter of less than 6.35 mm , forming a convex or concave shape continuously in the longitudinal direction of the surface, the surface area of the outer periphery of the convex surface is a convex surface area and a concave surface area A deformed wire rod having a total surface area of 20% to 80% of the total surface area of the grooves therebetween . 請求項記載の異形線条材を補強線として用いたことを特徴とするコンクリート製品或はコンクリート建築用構造物。 A concrete product or a concrete building structure, wherein the deformed wire rod according to claim 1 is used as a reinforcing wire.
JP37406199A 1999-12-28 1999-12-28 Deformed wire rod Expired - Fee Related JP3684124B2 (en)

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