KR100240863B1 - The method of manufacture of a steel fiber for concrete - Google Patents

The method of manufacture of a steel fiber for concrete Download PDF

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KR100240863B1
KR100240863B1 KR1019970080792A KR19970080792A KR100240863B1 KR 100240863 B1 KR100240863 B1 KR 100240863B1 KR 1019970080792 A KR1019970080792 A KR 1019970080792A KR 19970080792 A KR19970080792 A KR 19970080792A KR 100240863 B1 KR100240863 B1 KR 100240863B1
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steel
steel fiber
concrete
cement mortar
bent part
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KR1019970080792A
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Korean (ko)
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KR19990060555A (en
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김춘웅
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김춘웅
금강와이어메쉬산업주식회사
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0242—Flattening; Dressing; Flexing
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/34—Metals, e.g. ferro-silicon
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2261/00—Machining or cutting being involved

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)

Abstract

본 발명은 콘크리트용 강(鋼)섬유 및 그 제법에 관한 것으로 갱벽(坑壁)에 분사적층하는 콘크리트의 강도를 증대시키기 위하여 시멘트 몰타르에 혼합하는 강섬유에 있어서, 여러가닥의 강섬유 소재인 강선(鋼線)을 정형하고 굴곡부가 형성되게 압형한 다음 압형된 강선을 회전컷터에 의하여 순차적으로 절단하여 굴곡부가 구성된 강섬유를 능율적으로 다량 생산하는 동시 강섬유의 굴곡부는, 균등곡형, 편등곡형, 단곡형 및 증곡형 등으로 성형하여 시멘트 몰타르에서 강섬유의 분산효과와 콘크리트의 물리적 강도를 증대할 수 있게 한 것이다.TECHNICAL FIELD The present invention relates to steel fibers for concrete and a method for manufacturing the same. In the steel fibers mixed with cement mortar in order to increase the strength of concrete which is spray-laminated onto a gang wall, steel wire which is a multi-strand steel fiber material The bent part of the simultaneous steel fiber which forms the bent part and forms the bent part, and then cuts the pressed steel wire sequentially by the rotary cutter to produce a large amount of the steel fiber composed of the bent part, such as uniform, uneven, short and It is molded by the thickening type to increase the dispersion effect of steel fiber and the physical strength of concrete in cement mortar.

Description

콘크리트용 강섬유 및 그 제법Steel fiber for concrete and its manufacturing method

본 발명은 콘크리트용 강(鋼)섬유 및 그 제법에 관한 것이다.The present invention relates to a steel fiber for concrete and a method for manufacturing the same.

콘크리트용 강섬유란, 가는 강선(0.65~0.8Ø)을 25~40mm길이로 절단하여 콘크리트 단위용적(1m3)당 약 500,000개를 혼합 분산하여 콘크리트의 물리적 강도를 개선하고 기존의 콘크리트 보다 인장, 휨, 전단에 대한 인성을 높히며, 갱의 벽면과 청장에 공기압력으로 시멘트 몰타르를 분사하여 적층할 때 강섬유의 결합력에 의하여 몰타르가 순간적으로 응도되어 목적하는 콘크리트 구조물을 타설하는데 사용되고 있다.Steel fiber for concrete is, by cutting a thin wire (0.65 ~ 0.8Ø) to 25 ~ 40mm long concrete unit volume (1m 3) about a 500,000 mixed and dispersed to improve the physical strength of concrete and the tensile, bending than conventional concrete per In order to increase the toughness against shear, the mortar is instantaneously hardened by the bonding force of steel fiber when the cement mortar is sprayed and laminated on the wall and the duct of the gang by air pressure.

종래의 강섬유는 단순한 직선형으로 형성되어 있어, 시멘트 몰타르에 혼합하였을 때 강(鋼)섬유가 균일한 분포로 분사되지 못하고 강섬유끼리 뭉치는 폐단이 있으며, 또 강섬유와 시멘트 몰타르와의 결합강도가 높지 못하여 공기압으로 시멘트 몰타를 분사할 때 응고전에 몰타르가 탈락되는 율이 높고 경화된 콘크리트의 물리적 강도가 별로 높지 못한 미비점이 있었다.Conventional steel fibers are formed in a simple straight shape, when mixed with cement mortar, the steel fibers are not sprayed in a uniform distribution, there is a closed end of the bundle of steel fibers, and the bonding strength between the steel fibers and cement mortar is not high When spraying cement malta by pneumatic pressure, the mortar dropped before solidification and the physical strength of hardened concrete was not high.

따라서 시멘트 몰타르의 탈락을 방지하기 위하여 벽면이나 천장면에 철망을 거프집 대용으로 친 다음 찰망 구멍을 통하여 시멘트 몰타르를 분사하고 있으나 벽면 공간에 시멘트 몰타르를 채우기도 전에 철망의 구멍이 시멘트 몰타르에 의해 막히어 작업을 진행하기 어려운 문제점이 있었다.Therefore, in order to prevent the fall of cement mortar, a wire mesh is applied to the wall or ceiling as a substitute for guffing, and then cement mortar is sprayed through the hole of the mesh, but before the cement mortar is filled in the wall space, the hole of the wire mesh is blocked by the cement mortar. There was a problem that was difficult to proceed.

본 발명은 종래의 이러한 문제점을 시정하기 위하여, 여러 가지로 시험 연구한 결과 종래 사용되던 직선형 강섬유 대신, 균등곡형, 편등곡형, 단곡형, 중곡형 등 여러 가지 형상으로 굴곡부가 구성된 새로운 강섬유와 그 제법을 개발하였다.The present invention, in order to correct the problems of the prior art, as a result of various tests and studies, instead of the conventionally used straight steel fiber, a new steel fiber composed of bent parts in various shapes such as uniform, uneven, short, medium, and the manufacturing method Developed.

본 발명의 목적은, 시멘트 몰타르에 강섬유가 균일한 분포로 혼합 분산되는 동시 시멘트 몰타르와 강섬유와의 결합강도가 커서, 천장이나 벽면에 공기압에 의항 분사하여 작업할 때 분사된 시멘트 몰타가 강섬유의 결합에 의하여 탈락되지 않고 강력하게 부착되는 동시 순간 경화제에 의하여 경화되어, 철망을 사용함이 없이 유효하게 강력한 콘크리트 구조물을 시공할 수 있는 새로운 강섬유를 제공하려는데 있다.It is an object of the present invention that the bonding strength between the cement mortar and the steel fiber at the same time when the steel fiber is mixed and dispersed in a uniform distribution of cement mortar is large, the cement mortar sprayed when working by spraying air pressure on the ceiling or the wall is a combination of the steel fiber It is to provide a new steel fiber that can be hardened by a simultaneous instant curing agent that is not dropped by the strong instantaneous hardener, and can effectively build a concrete structure without using a wire mesh.

본 발명의 또 다른 목적은, 강섬유의 제조에 있어서, 여러가닥의 강철사를 동시에 직선으로 정형하는 동시 굴곡부를 압형하고 또한 여러가닥의 압형된 강섬유를 칼날이 약간의 각도로 어긋나게 구성된 회전컷트에 의하여 한가닥씩 순차적으로 고속 절단하여 보다 적은 동력으로 보다 능률적으로 다량의 가섬유를 자동으로 생산할 수 있게 하려는데 있다.Another object of the present invention, in the production of steel fibers, by pressing a simultaneous bending part for straightening a plurality of steel yarns at the same time in a straight line, and also a single strand by a rotary cut composed of a plurality of strands of the pressed steel fibers are offset at a slight angle It is intended to be able to automatically produce a large amount of false fibers with less power by sequential high speed cutting.

제1도는 본 발명의 강섬유 제법 실시예의 평면 예시도.1 is a plan view of a steel fiber manufacturing example of the present invention.

제2도는 본 발명의 강섬유 제법 실시예의 측면 예시도.2 is a side view illustrating a steel fiber manufacturing example of the present invention.

제3도는 본 발명의 실시예에서 사용되는 회전컷터의 사시도.3 is a perspective view of a rotary cutter used in the embodiment of the present invention.

제4도는 본 발명의 강섬유의 굴곡부의 구성조건 설명도.4 is an explanatory view of the structural conditions of the bent portion of the steel fiber of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 강선 2 : 보빈1: steel wire 2: bobbin

3 : 안내롤러 4 : 분배칸3: guide roller 4: distribution slot

5 : 분배판 6,6′ : 정형 롤러5: Distribution Plate 6,6 ′: Orthopedic Roller

7,7′ : 성형 롤러 8 : 회전컷트7,7 ': forming roller 8: rotating cut

9 : 칼날 9′ : 고정날9: blade 9 ′: fixed blade

제4도는 본 발명의 강섬유의 굴곡부의 구성에 대한 설명도이다. 본 발명의 강섬유는 굵기는 종래와 같은 0.65~0.8Ø이고 길이는 25~40mm 정도이며, 강섬유(f)에 굴곡부(w)가 구성된 점이 특징이다.4 is an explanatory view of the configuration of the bent portion of the steel fiber of the present invention. Steel fiber of the present invention has a thickness of 0.65 ~ 0.8Ø and the length is about 25 ~ 40mm as in the prior art, characterized in that the bent portion (w) is configured in the steel fiber (f).

제4a도는, 강섬유(f)의 굴곡부(w)가 전체에 걸쳐 등각으로 형성된 균등곡형으로 구성되어 있다. 제4(b)도는, 강섬유(f)의 굴곡부(w)가 톱날과 같은 평등곡형으로 구성되어 있다. 제4(c)도는, 강섬유(f)의 굴곡부(w)가 강섬유의 양 단부측에만 형성된 단곡형으로 구성되어 있다. 제4(d)도는, 강섬유(f)의 굴곡부(w)가 중간부에만 형성된 중곡형으로 구성되어 있다.In FIG. 4A, the curved part w of the steel fiber f is formed in the equal curved shape formed in conformal shape over the whole. In FIG. 4 (b), the bending part w of the steel fiber f is comprised in the shape of an equal curve like a saw blade. In FIG. 4 (c), the bending part w of the steel fiber f is comprised in the short form formed only in the both end side of steel fiber. In FIG. 4 (d), the curved part w of the steel fiber f is comprised in the intermediate | middle curved shape formed only in the middle part.

이들 강섬유는 본 발명의 대표적인 굴곡부의 형태를 보인 것이며, 이로부터 다양한 형태의 굴곡부를 전개할 수 있다.These steel fibers are shown in the form of a representative bent portion of the present invention, from which the various forms of bends can be developed.

본 발명에서 강섬유(f)의 굴곡부(w)의 형태는 강섬유의 길이(ℓ), 굴곡변의 길이(d), 굴곡핏치(p) 및 굴곡높이(h)가 다음의 조건에 충족되는 것이 바람직하다.In the present invention, the shape of the bent portion w of the steel fiber f is preferably the length of the steel fiber (l), the length of the bending edge (d), the bending pitch (p) and the bending height (h) satisfy the following conditions. .

형상비(形狀比) R=ℓ/d=40-60이 좋다. 또 변곡비(變曲比) R′=ℓ/p=6-10이 좋다. 또 변형비(變形比) R"=p/h=3-5가 좋다.The aspect ratio R = ℓ / d = 40-60 is good. In addition, the inflection ratio R '= ℓ / p = 6-10 is good. Moreover, strain ratio R "= p / h = 3-5 is good.

이러한 조건은 강섬유가 시멘트 몰타르와의 혼합시의 분산작용, 공기압으로 분사할 때의 유동성, 분사후의 시멘트 몰타르와의 결합성 등에 대하여, 수 없이 시험한 결과 가장 좋은 조건이다.These conditions are the best conditions after numerous tests on the dispersing action of the steel fiber when mixing with cement mortar, fluidity when spraying by air pressure, and bonding to cement mortar after spraying.

본 발명의 강섬유(f)는, 특정된 굴곡부(w)에 의하여 강섬유끼리는 엉키지 않고 잘 풀리어 시멘트 몰타르에 균일한 분포로 분산되고 하나 하나의 강섬유는 시멘트 몰타르와 비중에 큰 차이가 없고 또한 몰타르의 점도로 인하여 분산된 강섬유가 가라 앉거나 뭉치지 않고 분산 상태로 유지되며, 공기압에 의하여 균일하게 분사되어 콘크리트 내부에 분포된다.The steel fibers f of the present invention are dispersed in a uniform distribution in the pulley cement mortar without being entangled by the specified bend portion w, and one steel fiber does not have a big difference in the specific gravity of the cement mortar and also of the mortar. Due to the viscosity, the dispersed steel fibers are kept in a dispersed state without sinking or agglomeration, and are uniformly sprayed by air pressure and distributed in the concrete.

또한 강섬유(f)의 굴곡부(w)에 의하여 강섬유와 시멘트 몰타르와의 결합강도가 증대된다. 또한 벽면이나 천장에 시멘트 몰타르를 분사했을 때 탈락되지 않고 부착되면서 순간 경화제에 의하여 순간적으로 경화된다.In addition, the bond strength of the steel fiber and cement mortar is increased by the bent portion w of the steel fiber f. In addition, when cement mortar is sprayed on the wall or ceiling, it is hardened by the instant curing agent while being attached without falling off.

따라서 종래와 같이 거프집 대신 철망을 치고 철망의 구멍으로 시멘트 몰타르를 분사하던 폐단을 시정하고 철망 없이 직접 강섬유가 혼합된 시멘트 몰타를 벽면에 분사하여 콘크리트 구조물을 시공할 수 있다.Therefore, it is possible to construct a concrete structure by hitting a wire mesh instead of a giraffe and correcting a closed end of spraying cement mortar into a hole of the wire mesh and spraying a cement malta directly mixed with steel fibers on a wall without a wire mesh.

또한 철망을 가설하는 품과 시간이 절감되고 따라서 공기(工期)가 단축되며, 시공비용이 경제적으로 현저하게 절감된다. 또한 강섬유에 의한 콘크리트의 여러 가지 물리적 강도가 대단히 높게 증대되는 이점이 있다.In addition, it saves time and time to construct the wire mesh, thus shortening the air and significantly lowering the construction cost economically. In addition, there is an advantage that the various physical strength of the concrete by the steel fiber is increased very high.

본 발명의 강섬유의 제조에 대한 실시예를 첨부 도면에 의하여 상세히 설명하면 다음과 같다.When explaining the embodiment of the steel fiber of the present invention in detail by the accompanying drawings as follows.

제1도는 본 발명의 실시예를 보인 평면도이고 제2도는 동 측면도이다.1 is a plan view showing an embodiment of the present invention and Figure 2 is a side view of the same.

강섬유 소재인 강선(065-08Ø)(2)이 감진 60~100개 정도의 보빈(1)을 일방향으로 집중하여 풀릴 수 있게 배치한다. 이들 여러가닥의 강선(2)을 안내롤러(3)에 유도한다.Steel wire (065-08Ø) (2) of the steel fiber material is arranged so that the loosened 60 to 100 bobbin (1) concentrated in one direction. These multiple strands of steel wire 2 are guided to the guide roller 3.

안내롤러(3)의 다음에는 6개의 칸(4)의 형성된 분배판(5)이 설치되어 있다.Next to the guide roller 3, a distribution plate 5 formed of six compartments 4 is provided.

안내롤러(3)로 유도된 강선다발은 6등분하여 분배판(5)의 각 칸(4)으로 분할유도 한다. 본 발명에 분배판의 칸을 6등분으로 한정한 것이 아니다, 분배판(5)의 다음에는 강선을 직선으로 정형(整形)하는 복수개의 정형롤러(6)(6′)가 설치되어 강선이 이 정형롤러(6)(6′) 사이를 통과하는 중에 직선형으로 정형된다.The bundle of steel wires guided by the guide roller 3 is divided into six equal parts and divided into each compartment 4 of the distribution plate 5. In the present invention, the compartment of the distribution plate is not limited to six equal parts. After the distribution plate 5, a plurality of shaping rollers 6 (6 ') for forming a steel wire in a straight line are provided. Straightening is performed while passing between the shaping rollers 6 and 6 '.

정형롤러(6)(6′)의 다음에는 한쌍의 성형롤러(7)(7′)가 설치되어 있어 직선형으로 정형된 강선가닥을 압형하여 굴곡부가 형성된다.Next to the shaping rollers 6 and 6 ', a pair of shaping rollers 7 and 7' is provided to form a bent portion by pressing the steel wire strands formed in a straight line.

이 성형롤러(7)(7′)는, 상기한 제4도에 표시된 각종 형태의 굴곡부를 성형할수 있는 압형 롤러이며, 성형할 굴곡부의 형태에 따라 종류별로 성형롤러는 교체사용이 가능하다. 이렇게 정형공정과 성형공정을 거친 다음 성형롤러의 후방에 설치된 회전컷터(8)에 의하여 가선이 절단되어 굴곡부가 구성된 강섬유를 제조한다.The forming rollers 7 and 7 'are pressing rollers capable of molding the bent portions of various forms shown in FIG. 4, and the forming rollers can be replaced and used according to the type of the bent portion to be molded. After the forming process and the molding process, the cutting wire is cut by the rotary cutter 8 installed at the rear of the forming roller to produce a steel fiber having a bent portion.

이 회전컷터(8)는, 제3도에 표시된 바와 같이 복수개의 칼날(9)이 형성된 복수개의 회전컷터(8)를 지축(10)에 체결하되 각 칼날(9)이 약간씩 어긋난 각도로 배치되게 체결되어 있어, 회전컷터(8)의 회전마다 하나씩의 칼날(9)만이 고정날(9′)과 교합하여 강선을 순차적으로 절단하게 되어 있다.As shown in FIG. 3, the rotary cutter 8 engages the plurality of rotary cutters 8 having the plurality of blades 9 formed on the support shaft 10, and is disposed at an angle at which the blades 9 are slightly displaced. It is fastened so that only one blade 9 per rotation of the rotary cutter 8 engages with the fixed blade 9 ', and cuts the steel wire sequentially.

이는 절단 부하가 현저하게 적게 들어, 적은 동력으로 동력소비를 경제적으로 절감할 수 있는 이점이 있다.This has the advantage of significantly reducing the cutting load, economical power consumption with less power.

절단된 강섬유(f)의 길이는 25~40mm정도이며, 굴곡부를 먼저 성형한 다음 강선을 절단하여 강섬유를 제조하는 공정순서로 되어 있기 때문에 상기한 강섬유의 형상비, 변곡비, 변형비 등의 조건을 성형롤러에 의하여 용이하게 충족시킬 수 있다. 절단된 강섬유는 포대에 담어 출하한다.The length of the cut steel fiber (f) is about 25 ~ 40mm, and since the process of forming the bent portion first and then cutting the steel wire to produce the steel fiber, the conditions such as shape ratio, inflection ratio, strain ratio, etc. It can be easily satisfied by the forming roller. The cut steel fibers are shipped in bags.

본 발명의 강섬유는 콘크리트 타설시에 1m3당 약 500,000개 정도 분사되게 혼합하여 사용한다.Steel fiber of the present invention is used to mix about 500,000 sprayed per 1 m 3 when concrete is poured.

본 발명의 강섬유는 일관된 공정으로 자동 생산 하는 것이므로 저렴한 생산 코스트로 다량 생산할 수 있으며 각종 콘크리트 타설, 또는 공기압으로 분사하는 공법에 적용하여 유용하게 사용된다.Steel fiber of the present invention is to be produced automatically in a consistent process can be produced in large quantities at a low production cost, and is usefully applied to various concrete castings, or air pressure spraying method.

본 발명의 강섬유는 종래의 직선형 강섬유와 달리, 굴곡부가 형성되어 있기 때문에 콘크리트 시멘트 몰타르에 강섬유를 혼합교반 하였을 때, 강섬유끼리는 뭉치지 않으면서 시멘트 몰타르와의 결합강도는 매우 높기 때문에 균일한 분포로 분산 유지되고 유동성이 양호하여 시멘트 몰타르와 함께 공기압력으로 용이하게 분사되어 벽면이나 갱의 천장 등에 강력하게 밀착되는 동시 몰타르가 튀어 탈락되지 않으며, 순간 경화제에 의하여 순간적으로 콘크리트가 경화되면 강섬유가 일종의 철근과 같은 강화작용을 하여 콘크리트의 물리적 강도가 매우 향상되어 견고한 구조물을 시공할 수 있는 효과가 있다.Unlike the conventional straight steel fiber, the steel fiber of the present invention has a bent portion, and thus when the steel fiber is mixed and agitated in the concrete cement mortar, the bond strength with the cement mortar is very high without the agglomeration of the steel fibers. It has good fluidity and is easily sprayed with air pressure with cement mortar, so that it can be strongly adhered to wall or gang ceiling. By reinforcing action, the physical strength of concrete is greatly improved, and there is an effect that can construct a solid structure.

또한 일관된 공정으로 강선으로부터 굴곡부가 형성된 강섬유를 자동생산하므로 저렴한 생산 코스트로 능률적으로 다량의 강섬유를 생산하여 각종 콘크리트 구조물의 시공에 유효하게 사용할 수 있는 효과가 있다.In addition, since the automatic production of steel fibers with bends formed from steel wires in a consistent process, there is an effect that can be effectively used in the construction of various concrete structures by efficiently producing a large amount of steel fibers at a low production cost.

Claims (1)

콘크리트 타설시에 시멘트 몰타르에 혼합하여 사용하는 강섬유를 제조함에 있어서, 다수의 강선의 보빈(2)으로부터 풀리는 강선(1)을 안내롤러(3)에 의하여 유도하여 여러개의 칸(4)이 형성된 분배판(5)에 의하여 상기 복수가닥의 강선(1)을 각 칸(4)에 분할 유도하여 이를 복수개의 압형롤러(6)(6′)에 의하여 직선으로 정형한 다음 한쌍의 성형 롤러(7)(7′)에 의하여 강섬유(f)에 굴곡부를 성형하고, 칼날(9)이 어긋난 각도로 배치된 회전컷터(8)와 고정날(8′)에 의하여 상기 굴곡부가 성형된 강선을 순차적으로 소정의 길이로 절단하여, 일관된 공정으로 굴곡부가 구성된 강섬유를 제조하는 것을 특징으로 하는 콘크리트용 강섬유의 제법.In the production of steel fibers mixed with cement mortar for concrete pouring, a plurality of compartments 4 are formed by guiding the steel wire 1 released from the bobbin 2 of a plurality of steel wires by the guide roller 3. The plurality of strands of steel wire 1 are guided into the respective compartments 4 by the plate 5, and the molds are linearly formed by a plurality of press rollers 6 and 6 ', and then a pair of forming rollers 7 are formed. The curved portion was formed in the steel fiber f by 7 ', and the rotary cutter 8 and the steel wire in which the curved portion were formed by the fixed blade 8' were arranged in succession. The steel fiber manufacturing method for concrete, characterized in that to cut into a length of, to produce a steel fiber consisting of a bent portion in a consistent process.
KR1019970080792A 1997-12-31 1997-12-31 The method of manufacture of a steel fiber for concrete KR100240863B1 (en)

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KR102241540B1 (en) 2021-01-16 2021-04-15 배정은 Floor finishing construction method using steel fiber reinforced concrete and dry-shake

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KR20000006739A (en) * 1999-10-25 2000-02-07 박정환 Production method of concrete using iron core
KR100439865B1 (en) * 2001-11-08 2004-07-12 에스케이건설 주식회사 Synthetic fiber for using concrete and shotcrete
KR100471675B1 (en) * 2002-03-22 2005-03-09 스틸화이버코리아 주식회사 Manufacture of a rigid and ductile wire for the reinforcement of concrete
KR102580052B1 (en) * 2021-05-28 2023-10-11 경기대학교 산학협력단 Steel Fiber and Concrete Composite including the same

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JPH05194001A (en) * 1992-01-21 1993-08-03 Bridgestone Bekaert Steel Code Kk Steel fiber for reinforcing concrete and its production

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Publication number Priority date Publication date Assignee Title
KR102241540B1 (en) 2021-01-16 2021-04-15 배정은 Floor finishing construction method using steel fiber reinforced concrete and dry-shake

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