KR20090047044A - A concrete member comprising fireproofing material be covered on exterior of a steel pipe and constructing method the same - Google Patents

A concrete member comprising fireproofing material be covered on exterior of a steel pipe and constructing method the same Download PDF

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KR20090047044A
KR20090047044A KR1020070113021A KR20070113021A KR20090047044A KR 20090047044 A KR20090047044 A KR 20090047044A KR 1020070113021 A KR1020070113021 A KR 1020070113021A KR 20070113021 A KR20070113021 A KR 20070113021A KR 20090047044 A KR20090047044 A KR 20090047044A
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steel pipe
concrete
strength
thin steel
reinforced cement
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Korean (ko)
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김욱종
김용로
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대림산업 주식회사
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/30Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts being composed of two or more materials; Composite steel and concrete constructions
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00Use 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
    • C04B14/38Fibrous materials; Whiskers
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92Protection against other undesired influences or dangers
    • E04B1/94Protection against other undesired influences or dangers against fire
    • E04B1/941Building elements specially adapted therefor
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00Structural elongated elements designed for load-supporting
    • E04C3/02Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/29Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
    • E04C3/293Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00Structural elongated elements designed for load-supporting
    • E04C3/30Columns; Pillars; Struts
    • E04C3/36Columns; Pillars; Struts of materials not covered by groups E04C3/32 or E04C3/34; of a combination of two or more materials

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Ceramic Engineering (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Building Environments (AREA)

Abstract

본 발명은 고인성 섬유보강 시멘트 복합재료를 박판강관에 피복시켜 압출성형한 콘크리트 성형틀을 현장에 직접 적용함으로써 고강도 콘크리트의 구속효과에 의한 기둥의 강도를 증대시키고, 고내화성에 의한 고강도 콘크리트의 폭열을 감소시킬 수 있는 강관 피복형 내화성 콘크리트 부재 및 그의 구축방법에 관한 것이다. The present invention increases the strength of the column due to the restraint effect of high-strength concrete by directly applying the extruded concrete molding frame to the field by coating the high toughness fiber reinforced cement composite material on the thin steel pipe, and thermal expansion of high-strength concrete by high fire resistance It relates to a steel pipe-coated refractory concrete member and a construction method thereof that can reduce.

본 발명은, 단면이 원형 또는 각형을 갖는 중공형 박판강관을 성형하는 제1 단계; 고인성 섬유보강 시멘트 복합재료에 의해 박판강관을 피복하여 콘크리트 성형틀을 압출성형하는 제2 단계; 및 상기 콘크리트 성형틀을 현장의 부재위치에 설치하고 내부에 고강도 콘크리트를 타설하여 콘크리트 부재를 구축하는 제3 단계를 포함하는 강관 피복형 내화성 콘크리트 부재 구축방법을 제공한다.The present invention, the first step of forming a hollow thin steel tube having a circular or rectangular cross section; A second step of extruding the concrete forming mold by covering the thin steel pipe with a high toughness fiber reinforced cement composite material; And it provides a steel pipe-coated refractory concrete member construction method comprising the third step of building the concrete member by installing the concrete forming frame in the member position on the site and high-strength concrete is placed therein.

상기한 본 발명은 패널형태가 아닌 중공형태의 성형틀을 고강도 및 고인성 섬유보강 시멘트 복합재료와 내부 형상을 유지하기 위한 박판 강관을 결합한 구조로 압출성형하여 현장의 기둥/보 부재 위치에 설치함으로써 고강도 콘크리트의 구속에 의한 기둥의 강도를 증대시키며, 구조설계시 부재단면을 축소할 수 있는 효과를 가진다.The present invention described above is extruded in a structure that combines a high-strength and high-toughness fiber reinforced cement composite material and a thin steel pipe for maintaining the internal shape by installing a hollow mold not in the form of a panel to install at the site of the column / beam member Increasing the strength of the column by the constraint of high-strength concrete, and has the effect of reducing the member cross-section in the structural design.

강관, 내화성 콘크리트, 고인성 섬유보강 시멘트, 콘크리트부재 성형틀 Steel pipe, fire resistant concrete, high toughness fiber reinforced cement, concrete member molding frame

Description

강관 피복형 내화성 콘크리트 부재 및 그의 구축방법{A concrete member comprising fireproofing material be covered on exterior of a steel pipe and constructing method the same}A concrete member comprising fireproofing material be covered on exterior of a steel pipe and constructing method the same}

본 발명은 고강도 콘크리트의 폭열을 방지하기 위한 강관 피복형 내화성 콘크리트 부재 및 그의 구축방법에 관한 것으로, 더욱 상세하게는 고인성 섬유보강 시멘트 복합재료와 박판강관을 압출성형하여 콘크리트 부재 성형틀을 제작하고, 이를 현장에 직접 적용하여 고강도 콘크리트를 타설함으로써 고내화성 및 구조성능을 부여할 수 있는 강관 피복형 내화성 콘크리트 부재 및 그의 구축방법에 관한 것이다. The present invention relates to a steel pipe-coated refractory concrete member and a construction method thereof to prevent thermal expansion of high-strength concrete, and more specifically, to produce a concrete member molding frame by extruding high toughness fiber reinforced cement composite material and sheet steel pipe The present invention relates to a steel pipe-coated refractory concrete member and a method of constructing the same, which are capable of giving high fire resistance and structural performance by pouring high-strength concrete directly on the site.

최근에는 건축 구조물이 초고층화, 대형화되고 있어 고강도 및 고성능 콘크리트의 사용이 증가하고 있다. 고성능 콘크리트는 큰 압축강도와 양호한 내구성을 발휘하도록 제조되는데, 이러한 성능을 충족시키기 위하여 콘크리트 구조체의 내부 조직이 치밀하게 구성된다. 빌딩, 주상복합아파트, 공공시설 등의 초고층 철근콘크 리트구조물에 있어서 고강도 콘크리트를 사용할 경우, 화재 등에 의해 극도의 고온하에 노출되면 콘크리트 속 수분이 밖으로 빠져 나오지 못하고 콘크리트 속에서 터져 콘크리트 파편이 비산되는 폭열현상이 발생하게 된다. 이러한 폭열현상은 고열이 콘크리트 구조체 내부로 전달되면 내부 수증기압이 발생하고, 콘크리트 구조체 내부에서 발생된 내부 수증기압이 콘크리트의 인장강도를 초과하면 심한 폭음과 함께 콘크리트의 구조체에서는 박리 및 탈락 현상이 발생되는 현상이다.  In recent years, the construction of the building has become very high and large, the use of high-strength and high-performance concrete is increasing. High-performance concrete is manufactured to have great compressive strength and good durability, and the internal structure of the concrete structure is densely constructed to satisfy this performance. When high-strength reinforced concrete structures are used in high-rise reinforced concrete structures such as buildings, residential complexes, and public facilities, when exposed to extreme high temperatures by fire, etc., the moisture in the concrete does not escape, and the concrete fragments are blown out. The phenomenon occurs. This thermal explosion phenomenon occurs when high heat is transferred to the inside of the concrete structure, and internal steam pressure is generated, and when the internal water vapor pressure generated inside the concrete structure exceeds the tensile strength of the concrete, severe explosion occurs and peeling and dropping occurs in the concrete structure. to be.

폭열현상이 고강도콘크리트 부재에 발생하게 되면 단면결손이 발생함과 동시에 피복두께의 감소에 의해 내부 철근의 온도상승을 유발하며, 그 결과 부재의 구조내력이 급격히 저하되어 건물붕괴가 가속화된다. 이와 같은 폭열현상으로 인한 콘크리트 구조체의 손상정도는 낮은 물시멘트비로 강도가 크고, 내부 조직이 치밀한 고성능 콘크리트일수록 더 크게 된다.When the thermal explosion occurs on the high-strength concrete member, cross-sectional defects occur and the temperature of the internal reinforcement is increased by the reduction of the coating thickness. As a result, the structural strength of the member is rapidly lowered to accelerate the collapse of the building. The damage of the concrete structure due to the thermal expansion phenomenon is greater in the high strength concrete with a low water cement ratio, the dense internal structure is greater.

한편, 건설교통부에서 규정한 고강도 콘크리트의 기둥/보의 내화성능 관리기준안을 살펴보면, 설계기준강도가 50MPa 이상의 고강도콘크리트 부재를 사용하도록 되어 있고, 특히 주로 초고층건축물 등에는 설계기준강도가 80MPa급의 고강도콘크리트가 적용되기 때문에 건축기준법에 따라 소요의 내화성능(구조내력상 지장을 초래하는 변형, 파괴 및 그 외의 손상을 일으키지 않을 것, 즉 비손상성)이 요구된다.On the other hand, if you look at the fire resistance performance management standards of high strength concrete columns / beams prescribed by the Ministry of Construction and Transportation, the use of high-strength concrete members with a design reference strength of 50MPa or more, especially for high-rise buildings, such as 80MPa-class high strength Because concrete is applied, the fire resistance performance required by the Building Standards Act (that is, it will not cause deformation, destruction and other damages, ie intactness), which will cause structural strength problems.

이에 따라, 고강도콘크리트 부재에 있어서 전술한 폭열현상을 방지하기 위한 공법이 다양하게 제안되고 있다. Accordingly, various methods have been proposed for preventing the above-described thermal expansion phenomenon in high-strength concrete members.

예를 들면, a) 고강도콘크리트 부재의 표면을 박판의 강판으로 피복하는 방 법(강판피복공법); b) 고강도콘크리트 비빔시 용융점이 낮은 유기재료(구체적으로는, 직경 5~100㎛, 길이 3~40mm인 유기섬유)를 0.02~0.5용적% 혼입하여 제조하는 공법(내폭열콘크리트공법); c) 각종 내화패널을 고강도콘크리트 부재의 표면에 앵커로 부착하는 공법(내화패널부착공법), d) 각종 내화도료를 고강도콘크리트 부재의 표면에 도포하는 공법(내화도료도포공법) 등이 제안되고 있다. 그러나, 상기 a)의 강판피복공법은 복잡한 시공과정과 고비용이 소요될 뿐만 아니라 화재시 강판이 화열에 의해 급격히 손상을 입게 된다. 또한, 상기 b)의 내폭열콘크리트공법은 유기섬유의 혼입에 의해 고강도콘크리트 비빔시 화이버볼(Fiber-ball) 현상이 발생되거나 유동성이 크게 저하되어 타설작업이 곤란하게 될 우려가 있다. 특히, 고강도 콘크리트에 폴리프로필렌계열의 섬유를 혼입한 구조는 레미콘 생산성 및 현장에서의 콘크리트 시공성이 급격히 저하되고, 일정 혼입율 이하 또는 분산성이 확보되지 않았을 경우 콘크리트 폭열억제성능의 발현이 불가능한 문제점이 있다. 상기 c)의 내화패널 부착공법은 화재발생시 화열의 차단성능은 양호한 반면, 시공과정이 복잡하고 고비용이 소요되며, 상기 내화패널에 더하여 마감재가 부착되어야 하므로 부재의 단면이 크게 증대될 우려가 있다. 상기 d)의 내화도료도포공법은 시공이 간편하고 부재단면이 증대될 우려가 없는 반면, 화재발생시 소요의 내화성능을 만족시키지 못하는 등의 문제점이 지적되고 있다.For example, a) a method of coating the surface of a high strength concrete member with a thin steel sheet (steel coating method); b) a method of manufacturing by mixing 0.02 to 0.5% by volume of an organic material having a low melting point (specifically, an organic fiber having a diameter of 5 to 100 µm and a length of 3 to 40 mm) in high-strength concrete bibeam (explosion-resistant concrete method); c) A method of attaching various fireproof panels to the surface of the high strength concrete member with an anchor (fireproof panel attachment method), and d) a method of applying various fireproof paints to the surface of the high strength concrete member (fireproof coating method) and the like have been proposed. . However, the steel sheet coating method of a) requires a complicated construction process and high cost, and the steel sheet is suddenly damaged by fire in case of fire. In addition, in the b-resistant concrete method of b), fiber-ball phenomenon occurs when the high-strength concrete bibimbly occurs due to the incorporation of organic fibers, or the fluidity may be greatly reduced, thereby making the casting work difficult. In particular, the structure in which the polypropylene-based fiber is mixed with high-strength concrete has a problem in that concrete ready-mixing performance and concrete workability in the field are drastically deteriorated, and when the concrete mixing ratio or dispersion is not secured, the expression of the concrete heat suppression performance is impossible. . The fireproof panel attaching method of c) has a good thermal insulation performance in the event of a fire, but the construction process is complicated and expensive, and the finishing material should be attached to the fireproof panel, so that the cross section of the member may be greatly increased. While the fireproof coating method of d) is easy to construct and there is no fear of increasing the cross-section of the member, problems such as failing to satisfy the required fire resistance performance in case of fire have been pointed out.

따라서, 본 발명은 상기한 제반 문제점을 해결하기 위하여 제안된 것으로서, 고인성 섬유보강 시멘트 복합재료를 박판강관에 피복시켜 압출성형한 콘크리트 성형틀을 현장의 기둥/보에 직접 적용함으로써 고강도 콘크리트의 구속효과에 의한 기둥의 강도를 증대시키고, 고내화성에 의한 고강도 콘크리트의 폭열을 감소시킬 수 있는 강관 피복형 내화성 콘크리트 부재 및 그의 구축방법을 제공함에 그 목적이 있다. Therefore, the present invention has been proposed to solve the above problems, the high-strength fiber-reinforced cement composite material is coated on a thin steel pipe to apply the extruded concrete molding frame directly to the pillars / beams of the field to restrain the high-strength concrete It is an object of the present invention to provide a steel pipe-coated refractory concrete member and a method of constructing the same, which can increase the strength of a column by an effect and reduce the thermal expansion of high-strength concrete due to high fire resistance.

상기 목적을 달성하기 위하여 본 발명은, 단면이 원형 또는 각형을 갖는 중공형 박판강관을 성형하는 제1 단계; 고인성 섬유보강 시멘트 복합재료에 의해 박판강관을 피복하여 콘크리트 성형틀을 압출성형하는 제2 단계; 및 상기 콘크리트 성형틀을 현장의 부재위치에 설치하고 내부에 고강도 콘크리트를 타설하여 콘크리트 부재를 구축하는 제3 단계를 포함하는 강관 피복형 내화성 콘크리트 부재 구축방법을 제공한다.The present invention to achieve the above object, the first step of forming a hollow thin steel tube having a circular or rectangular cross section; A second step of extruding the concrete forming mold by covering the thin steel pipe with a high toughness fiber reinforced cement composite material; And it provides a steel pipe-coated refractory concrete member construction method comprising the third step of building the concrete member by installing the concrete forming frame in the member position on the site and high-strength concrete is placed therein.

또한, 본 발명은 원형 또는 각형중 선택된 하나의 단면으로 형성되며, 내부형상을 유지하기 위한 박판 강관; 상기 박판 강관에 임의의 두께로 피복되어 박판강관의 내부로 타설되는 고강도 콘크리트의 폭열방지를 위한 내화성능을 갖는 고인성 섬유보강 시멘트 복합부재; 및 상기 박판 강관 내부에 채워져 기둥/보의 역활을 하는 고강도 콘크리트를 포함하는 강관 피복형 내화성 콘크리트 부재를 제공한다.In addition, the present invention is formed in a cross-section of one selected from a circular or square, thin steel pipe for maintaining the inner shape; A high toughness fiber-reinforced cement composite member having fire resistance to prevent thermal expansion of high-strength concrete that is coated to the thin steel pipe at an arbitrary thickness; And it provides a steel pipe-coated refractory concrete member comprising a high-strength concrete filled in the sheet steel pipe and serves as a column / beam.

상기한 바와 같이 본 발명의 특징에 따르면, 패널형태가 아닌 중공형태의 성형틀을 고강도 및 고인성 섬유보강 시멘트 복합재료와 내부 형상을 유지하기 위한 박판 강관을 결합한 구조로 압출성형하여 현장의 기둥/보 부재 위치에 설치함으로써 고강도 콘크리트의 구속에 의한 기둥의 강도를 증대시키며, 구조설계시 부재단면을 축소할 수 있는 효과를 가진다.According to the characteristics of the present invention as described above, the hollow-shaped mold not in the form of a panel is extruded into a structure combining a high strength and high toughness fiber reinforced cement composite material and a sheet steel pipe to maintain the internal shape pillars / By installing at the beam member position, the strength of the column due to the constraint of high-strength concrete is increased, and it is possible to reduce the member cross section during structural design.

또한, 본 발명은 기둥/보 부재 내부를 초고강도 콘크리트로 적용하더라도 고강도 및 고인성 섬유보강 시멘트 복합재료에 의한 내화성능이 확보되므로, 초고강도 콘크리트의 폭열 방지를 위한 별도의 조치가 필요없고, 고강도 콘크리트의 외부에 박판 강관이 미리 감사고 있어 내화성능 및 구조성능의 확보를 위한 고인성 섬유보강 시멘트 복합재료의 두께를 최소화할 수 있어 경제성이 확보되는 다른 효과를 가진다. In addition, the present invention secures fire resistance by high strength and high toughness fiber reinforced cement composite material even when the inside of the column / beam member is used as ultra high strength concrete, and therefore, no additional measures are required to prevent the thermal expansion of the ultra high strength concrete. Thin steel pipes are externally audited on the outside of the concrete, which can minimize the thickness of the high toughness fiber reinforced cement composite material for securing fire resistance and structural performance.

이하, 본 발명의 바람직한 실시예를 도1 및 도2를 참조하여 상세히 설명한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 1 and 2.

본 발명에 의한 강관 피복형 내화성 콘크리트 부재 및 그의 구축방법은 내부 형상을 유지하는 박판 강관의 외면에 고강도 및 내화성 복합부재를 부착하여 성형틀을 제조하고, 이를 현장의 기둥/보 부재 위치에 설치함으로써 고내화성 및 구조성능을 향상시키고, 고강도 콘크리트의 폭열을 방지할 수 있도록 구현한 것이다.Steel pipe-coated refractory concrete member and construction method thereof according to the present invention by attaching a high-strength and fire-resistant composite member to the outer surface of the sheet steel pipe to maintain the internal shape to manufacture a molding frame, by installing it at the site of the column / beam member It is to improve the high fire resistance and structural performance, and to prevent the thermal explosion of high-strength concrete.

도1a 내지 도1c는 본 발명에 의한 강관 피복형 내화성 콘크리트 부재의 횡단면 및 종단면도이다.1A to 1C are cross-sectional and longitudinal cross-sectional views of a steel pipe-coated refractory concrete member according to the present invention.

도면에 도시한 바와 같이, 본 발명은 내부형상을 유지하기 위한 중공형태의 박판 강관(101)과; 상기 박판 강관(101)에 임의의 두께로 피복되어 박판 강관(101)의 내부로 타설되는 고강도 콘크리트의 폭열방지를 위한 고내화성능 및 고인성을 갖는 섬유보강 시멘트 복합부재(102); 및 상기 박판 강관(102)에 채워져 기둥 역활을 하는 고강도 콘크리트(103)를 포함한다.As shown in the figure, the present invention is a hollow steel sheet 101 of the hollow form for maintaining the internal shape; A fiber-reinforced cement composite member 102 having high fire resistance and high toughness for preventing thermal expansion of high-strength concrete which is coated to the thin steel pipe 101 to an arbitrary thickness and poured into the thin steel pipe 101; And high strength concrete 103 filled in the sheet steel pipe 102 to serve as a pillar.

본 발명의 실시예에서, 상기 박판강관(101)은 도2a에 도시된 바와 같이 사각단면으로 이루어지거나, 도2b에 도시한 바와 같이 원형단면을 이루어질 수 있다.In the embodiment of the present invention, the thin steel pipe 101 may be made of a rectangular cross section as shown in Figure 2a, or may be made of a circular cross section as shown in Figure 2b.

또한, 상기 박판 강관(101)은 도2a 및 도2b에 도시한 바와 같이 섬유보강 시멘트 복합부재(102)와의 부착력을 증대시키기 위하여 외면에 요철 또는 주름부(104)를 형성할 수도 있다. In addition, the thin steel pipe 101 may be formed with irregularities or wrinkles 104 on the outer surface in order to increase the adhesion to the fiber reinforced cement composite member 102, as shown in Figures 2a and 2b.

여기서, 도2a는 사각단면의 강관에 요철이 형성된 구조를 나타내고, 도2b는 원형단면의 강관에 요철이 형성된 구조를 나타낸 것을 보여주고 있다.2A shows a structure in which irregularities are formed in a steel pipe of a square section, and FIG. 2B shows a structure in which irregularities are formed in a steel pipe of a circular cross section.

상기 고인성 섬유보강 시멘트 복합부재(102)는 기존의 일반 시멘트 매트릭스에 비해 인성을 크게 향상시킨 재료로서 내부에 혼입되는 유기섬유 및 강섬유에 의해 콘크리트의 체적 팽창에 대응함으로써 균열 저감 및 우수한 내화성능을 가진 건축재료이다. 이러한 고인성 섬유보강 시멘트 복합체에 관한 연구는 최근 상당히 많이 수행되어오고 있으며, 콘크리트와 같이 사용재료의 비율을 변동시킴으로써 요구되는 성능을 조정할 수 있다.The high toughness fiber reinforced cement composite member 102 is a material which greatly improves toughness compared to the conventional cement matrix, and corresponds to the volume expansion of concrete by organic fibers and steel fibers incorporated therein, thereby reducing cracks and providing excellent fire resistance. It is a building material with. Recently, a lot of studies on the high toughness fiber reinforced cement composite have been conducted, and the required performance can be adjusted by varying the proportion of materials used, such as concrete.

본 발명에 적용되는 고인성 섬유보강 시멘트 복합체의 주요 구성재료는 다음과 같다. The main constituent materials of the high toughness fiber reinforced cement composite applied to the present invention are as follows.

시멘트, 플라이애시, 고로슬래그 미분말, 실리카흄, 폴리머시멘트, 내화시멘트등의 시멘트계 결합재와; 입경 5mm 이하의 잔골재와; 충전재, 팽창재, 수축저감재등의 기능성 혼화재; 시공성 확보를 위한 멜라민계 또는 폴리카르본산계 고성능감수제와 같은 혼화재; 콘크리트용 비빔수 ; 및 PE(폴리에틸렌) 섬유, PVA(폴리비닐알콜) 섬유, PP(폴리프로필렌) 섬유, SF(강섬유)등의 섬유계열 부재를 포함하여 조성된다.Cement-based binders such as cement, fly ash, blast furnace slag fine powder, silica fume, polymer cement and refractory cement; Fine aggregate having a particle diameter of 5 mm or less; Functional admixtures such as fillers, inflators, and shrinkage reducing materials; Admixtures such as melamine-based or polycarboxylic acid-based high performance reducing agents for securing workability; Number of non-beams for concrete; And fiber-based members such as PE (polyethylene) fibers, PVA (polyvinyl alcohol) fibers, PP (polypropylene) fibers, SF (steel fibers) and the like.

이러한 구조의 고인성 섬유보강 시멘트 복합체는 내부에 적용되는 고강도 콘크리트의 강도 수준과 유사하게 압축강도 40MPa 이상이며, 고인성을 확보하기 위해 섬유는 고장력 섬유를 사용하고, 내화성능의 향상을 위해 내화성능을 확보할 수 있는 결합재를 일부 적용한 것이다.The high toughness fiber reinforced cement composite of this structure has a compressive strength of 40MPa or more, similar to the strength level of high strength concrete applied to the inside, and the fiber uses high-strength fibers to secure high toughness, and fire resistance performance to improve fire performance. Some of the binders that can ensure the application of.

다음, 상기와 같이 구성된 본 발명의 강관 피복형 내화 콘크리트의 구축방법을 설명한다.Next, the construction method of the steel pipe-coated refractory concrete of the present invention configured as described above will be described.

먼저, 단면이 원형 또는 각형을 갖는 중공형 박판강관을 성형하고, 상기 박판 강관의 외면에 고인성 섬유보강 시멘트 복합재료를 피복하여 콘크리트 성형틀을 압출성형한다.First, a hollow thin steel pipe having a circular or rectangular cross section is formed, and a concrete mold is extruded by coating a high toughness fiber reinforced cement composite material on the outer surface of the thin steel pipe.

상기와 같이 제작된 콘크리트 성형틀을 현장의 부재위치에 설치하고, 강관 내부에 고강도 콘크리트를 타설하여 콘크리트 부재를 구축하게 된다.The concrete forming mold manufactured as described above is installed at the site of the member, and the concrete member is constructed by pouring high strength concrete into the steel pipe.

한편, 콘크리트 부재 내부에 철근 배근이 필요한 경우 성형틀 설치 위치에 사전 배근 작업을 실시한다. On the other hand, when reinforcement is required inside the concrete member, the preliminary reinforcement work is performed at the molding frame installation position.

상기 콘크리트 성형틀의 압출성형시에, 고인성 섬유보강 시멘트 복합재료와 박판 강관의 부착성을 증대시키기 위하여 상기 사각 또는 원형 단면의 박판 강관 외면에 요철이나 주름을 성형하여 상기 고강도 섬유보강 시멘트 복합재료와의 부착성을 증대시킨다. In the extrusion molding of the concrete mold, the high strength fiber reinforced cement composite material is formed by forming irregularities or wrinkles on the outer surface of the thin steel pipe of rectangular or circular cross section to increase the adhesion between the high toughness fiber reinforced cement composite material and the thin steel pipe. Increases adhesion to

상기 고인성 섬유보강 시멘트 복합재료는 시멘트, 혼화재료, 잔골재, 합성섬유, 강섬유, 성형조제 및 물을 혼합하여 조성되며, 이와 같이 조성된 고인성 섬유보강 시멘트 복합부재는 내화성능이 우수하여 고강도 콘크리트의 폭열을 방지할 수 있는 것이다.The high toughness fiber reinforced cement composite material is formed by mixing cement, admixture, fine aggregate, synthetic fiber, steel fiber, molding aid and water, and the high toughness fiber reinforced cement composite member thus prepared has high fire resistance and high strength concrete. This can prevent the explosion.

이상에서 설명한 본 발명은 전술한 실시예 및 첨부된 도면에 의해 한정되는 것이 아니고, 본 발명의 기술적 사상을 벗어나지 않는 범위 내에서 여러 가지 치환, 변형 및 변경이 가능하다는 것이 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 있어 명백할 것이다.The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes can be made in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

도1a 및 도1b는 본 발명에 의한 강관 피복형 내화성 콘크리트 부재의 횡단면 예시도.Figure 1a and Figure 1b is a cross-sectional view of the steel pipe-coated refractory concrete member according to the present invention.

도1c는 본 발명에 의한 강관 피복형 내화성 콘크리트 부재의 종단면도.Figure 1c is a longitudinal sectional view of a steel pipe-coated fire-resistant concrete member according to the present invention.

도2a 및 도2b는 본 발명의 요부인 박판 강관의 단면도.Figure 2a and Figure 2b is a cross-sectional view of the thin steel pipe which is the main portion of the present invention.

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

101: 박판 강관 102: 고인성 섬유보강 시멘트 복합부재101: sheet steel pipe 102: high toughness fiber reinforced cement composite member

103: 고강도 콘크리트 부재 104: 요철103: high strength concrete member 104: irregularities

Claims (6)

단면이 원형 또는 각형을 갖는 중공형 박판강관을 성형하는 제1 단계;A first step of forming a hollow thin steel tube having a circular or rectangular cross section; 고인성 섬유보강 시멘트 복합재료에 의해 박판강관을 피복하여 콘크리트 성형틀을 압출성형하는 제2 단계; 및A second step of extruding the concrete forming mold by covering the thin steel pipe with a high toughness fiber reinforced cement composite material; And 상기 콘크리트 성형틀을 현장의 부재위치에 설치하고 내부에 고강도 콘크리트를 타설하여 콘크리트 부재를 구축하는 제3 단계The third step of building the concrete member by installing the concrete forming frame in the member position of the site and pouring high strength concrete therein 를 포함하는 강관 피복형 내화성 콘크리트 부재 구축방법.Steel pipe clad refractory concrete member construction method comprising a. 제 1 항에 있어서,The method of claim 1, 상기 제1 단계는 The first step is 고인성 섬유보강 시멘트 복합재료와의 부착성능을 향상시키기 위하여 박판 강관의 외표면에 다수의 요철을 형성하여 압출하는 과정을 포함하는 강관 피복형 내화성 콘크리트 부재 구축방법.A method for constructing a steel pipe-coated refractory concrete member comprising a process of forming and extruding a plurality of irregularities on an outer surface of a thin steel pipe in order to improve adhesion with a high toughness fiber reinforced cement composite material. 제 1 항에 있어서,The method of claim 1, 상기 고인성 섬유보강 시멘트 복합재료는 시멘트, 혼화재료, 잔골재, 합성섬유, 강섬유, 성형조제 및 물을 혼합하여 조성되는 것을 특징으로 하는 강관 피복형 내화성 콘크리트 부재 구축방법.The high toughness fiber reinforced cement composite material is a steel pipe-coated refractory concrete member construction method characterized in that the cement, admixture, fine aggregate, synthetic fibers, steel fibers, molding aid and water is mixed. 제 1 항에 있어서, The method of claim 1, 상기 제3 단계는 The third step is 콘크리트 부재 내부에 철근 배근이 필요한 경우 성형틀 설치 위치에 사전 배근 작업을 실시하는 과정을 포함하는 강관 피복형 내화성 콘크리트 부재 구축방법.Method for constructing a steel pipe-coated fire-resistant concrete member comprising the step of performing the pre-reinforcement work in the forming frame installation position when the reinforcement is required inside the concrete member. 원형 또는 각형중 선택된 하나의 단면으로 형성되며, 내부형상을 유지하기 위한 박판 강관;A thin steel pipe which is formed in a cross section selected from a circular shape or a square shape and maintains an internal shape; 상기 박판 강관에 임의의 두께로 피복되어 박판강관의 내부로 타설되는 고강도 콘크리트의 폭열방지를 위한 내화성능을 갖는 고인성 섬유보강 시멘트 복합부재; 및 A high toughness fiber-reinforced cement composite member having fire resistance to prevent thermal expansion of high-strength concrete that is coated to the thin steel pipe at an arbitrary thickness; And 상기 박판 강관 내부에 채워져 기둥 역활을 하는 고강도 콘크리트High strength concrete filled inside the thin steel pipe to serve as a pillar 를 포함하는 강관 피복형 내화성 콘크리트 부재.Steel pipe-covered refractory concrete member comprising a. 제 3 항에 있어서,The method of claim 3, wherein 상기 박판강관과 고인성 섬유보강 시멘트 복합재료의 부착성을 향상시키기 위하여 상기 박판 강관의 외표면에 형성된 다수의 요철을 더 포함하는 강관 피복형 내화성 콘크리트 부재.Steel-coated fire-resistant concrete member further comprises a plurality of irregularities formed on the outer surface of the thin steel pipe in order to improve the adhesion between the thin steel pipe and the high toughness fiber reinforced cement composite material.
KR1020070113021A 2007-11-07 2007-11-07 A concrete member comprising fireproofing material be covered on exterior of a steel pipe and constructing method the same KR20090047044A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104018671A (en) * 2014-05-29 2014-09-03 广东工业大学 Non-glue confined concrete column using cement paste base body fiber cloth and manufacturing method thereof
CN104947849A (en) * 2015-05-07 2015-09-30 清华大学 Novel adhesive-lined concrete filled steel tube component and manufacturing method thereof
KR20160114758A (en) * 2015-03-24 2016-10-06 최광호 High ductility engineered cementitious composite reinforced with pva fiber and amorphous steel fiber
CN107514096A (en) * 2017-09-21 2017-12-26 华侨大学 A kind of steel epoxy resin mortar multiple tube concrete combination column
CN111608415A (en) * 2020-05-13 2020-09-01 武汉大学 Square steel tube concrete column reinforcing method based on high-ductility cement-based material

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104018671A (en) * 2014-05-29 2014-09-03 广东工业大学 Non-glue confined concrete column using cement paste base body fiber cloth and manufacturing method thereof
KR20160114758A (en) * 2015-03-24 2016-10-06 최광호 High ductility engineered cementitious composite reinforced with pva fiber and amorphous steel fiber
CN104947849A (en) * 2015-05-07 2015-09-30 清华大学 Novel adhesive-lined concrete filled steel tube component and manufacturing method thereof
CN107514096A (en) * 2017-09-21 2017-12-26 华侨大学 A kind of steel epoxy resin mortar multiple tube concrete combination column
CN111608415A (en) * 2020-05-13 2020-09-01 武汉大学 Square steel tube concrete column reinforcing method based on high-ductility cement-based material
CN111608415B (en) * 2020-05-13 2021-07-06 武汉大学 Square steel tube concrete column reinforcing method based on high-ductility cement-based material

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