KR20010002974A - Membrance coating method for improving adhesive strength and prevent corrosion of iron reinforce - Google Patents

Membrance coating method for improving adhesive strength and prevent corrosion of iron reinforce Download PDF

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Publication number
KR20010002974A
KR20010002974A KR1019990023062A KR19990023062A KR20010002974A KR 20010002974 A KR20010002974 A KR 20010002974A KR 1019990023062 A KR1019990023062 A KR 1019990023062A KR 19990023062 A KR19990023062 A KR 19990023062A KR 20010002974 A KR20010002974 A KR 20010002974A
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South Korea
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coating
film
rebar
paint
epoxy resin
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KR1019990023062A
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Korean (ko)
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김영
김정순
변윤섭
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김영
변윤섭
김정순
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Priority to KR1019990023062A priority Critical patent/KR20010002974A/en
Publication of KR20010002974A publication Critical patent/KR20010002974A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/04—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using press rams
    • B30B9/06—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using press rams co-operating with permeable casings or strainers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/34—Heating or cooling presses or parts thereof

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

PURPOSE: Provided is a method for preventing corrosion of reinforcing steel and for improving adhesion force to cement concrete by means of spreading an epoxy resin and inorganic powder. CONSTITUTION: The method comprises the steps of: cleaning the reinforcing steel with a synthetic detergent and drying; coating the dried reinforcing steel with a coating composition comprising 90 wt% of the thermosetting epoxy resin and 10 wt% of paint; spreading the inorganic powder or sand of fine particles onto the surface of the epoxy coated reinforcing steel; heat-treating.

Description

철근의 부식방지 및 접착력 향상을 위한 피막 도포방법{Membrance coating method for improving adhesive strength and prevent corrosion of iron reinforce}Membrane coating method for improving adhesive strength and prevent corrosion of iron reinforce}

본 발명은 철근 콘크리트 구조물에 이용되는 철근의 부식을 방지하고 시멘트 콘크리트와 접착을 강화하기 위하여 철근에 에폭시수지를 도포처리하고 무기분체를 침착시키는 철근의 부식방지 및 접착력 향상을 위한 피막 도포방법에 관한 것이다.The present invention relates to a coating method for preventing corrosion of reinforcing steel and improving adhesion by applying epoxy resin to steel bars and depositing inorganic powders in order to prevent corrosion of steel used in reinforced concrete structures and to enhance adhesion with cement concrete. will be.

일반적으로 철근은 철근콘크리트 구조물을 시공할 때 콘크리트 속에 보강재로 넣는 연강 선재로서, 그 구조물에 작용하는 전단, 반복인장 또는 반복하중에 항력을 갖도록 하고 콘크리트 구조물의 균열을 막아서 그 내구성과 수명을 향상시키고자 하는 재료이다.In general, rebar is a mild steel wire that is put into reinforcement in concrete when constructing a reinforced concrete structure.It has a drag on shear, cyclic tension or cyclic load acting on the structure and prevents cracking of the concrete structure to improve its durability and lifespan. It is the material to sleep.

그러나 산, 알칼리, 또는 염 등에 의한 부식이 있을 경우는 점차 외력에 대한 저항강도가 저하될 뿐 아니라 재료가 소모되고 오염, 파손되는 것을 막을 수 없는 단점을 가지고 있다. 특히 반복하중이 계속적으로 작용하는 교량 등의 구조물에서는 부식과 반복되는 하중에 의한 철근 피로현상이 증가하여 교량에 균열을 일으키고 그 수명을 단축시켜 심각한 장애를 일으키는 경우도 있다.However, when corrosion is caused by acid, alkali, or salt, the resistance to external force is gradually lowered, and it has a disadvantage in that the material is not consumed, and contamination and damage can not be prevented. In particular, in structures such as bridges where cyclic loads continue to act, rebar fatigue due to corrosion and repeated loads may increase, causing cracks in bridges and shortening their lifespan, which may cause serious obstacles.

종래에도 철근의 부식방지를 위하여 철근의 표면에 부식 방지 도료를 도포하고 있다. 그러나, 도료를 도포 처리하여 단순 부식방지만을 목적으로 하고 있으며, 철근의 이송이나 작업과정에서 도료의 탈락으로 인한 부식방지효과의 감소와 철근과 콘크리트 사이의 접착력 저하 등의 단점이 있었다.Conventionally, in order to prevent corrosion of reinforcing bars, an anti-corrosion paint is applied to the surface of the rebar. However, the coating is applied for the purpose of simply preventing corrosion, and there are disadvantages such as the reduction of the corrosion protection effect due to the dropout of the paint and the adhesion between the reinforcing steel and the concrete during the transfer or work of the steel.

따라서, 본 발명에서는 단순 부식방지만을 목적으로 하지 않고, 부식방지는 물론 철근과 콘크리트의 접착력을 향상시키기 위한 철근의 피막 도포방법을 제공하기 위한 것이다.Therefore, the present invention is not only for the purpose of simple corrosion protection, but also to provide a coating method of the reinforcing bar to improve the adhesion between the steel and concrete as well as corrosion protection.

본 발명에서는 철근에 자연 산화막이 형성되지 않도록 그 표면에 수지와 도료를 일정비율로 배합하여 도포 처리한 후 무기분체 또는 미립의 모래를 수지피막에 고르게 침착시키고, 적정 온도에서의 고온 열처리 및 상온에서의 냉각공정을 거쳐 피막을 형성함으로써, 무기분체 침착에 의해 탈리방지와 접착력 강화의 장점과 열처리에 의해 피막의 강도를 강화시켜 품질을 향상할 수 있도록 한다.In the present invention, a resin and a paint are mixed and coated on the surface of the reinforcing bar so that a natural oxide film is not formed, and inorganic sand or fine sand is evenly deposited on the resin film. By forming the film through the cooling process of the inorganic powder deposition, it is possible to improve the quality of the film by strengthening the strength of the film by the prevention of detachment and strengthening the adhesive strength by heat treatment.

이에 따라 종래의 도료를 도포 처리하여 단순 부식방지만을 목적으로 한 철근이 이송이나 작업과정에서 도료의 탈락으로 인한 부식방지효과의 감소와 철근과 콘크리트 사이의 접착력 저하 등의 단점을 보완할 수 있는 효과가 기대된다.Accordingly, by applying the conventional paint, the reinforcing bar for the purpose of simple corrosion prevention can compensate for the disadvantages such as the reduction of the anti-corrosion effect due to the dropping of the paint during the transfer or working process, and the deterioration of the adhesive strength between the reinforcing bar and the concrete. Is expected.

도 1은 본 발명에 의한 철근의 부식방지 및 접착력 향상을 위한 피막 도포방법을 설명하기 위한 공정도이다.1 is a process chart for explaining a coating method for preventing corrosion and improving adhesion of reinforcing steel bars according to the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

10 : 세척공정 20 : 건조 공정10: washing process 20: drying process

30 : 피막 형성공정 40 : 분체도포 및 침착공정30: film forming process 40: powder coating and deposition process

50 : 열처리공정50: heat treatment process

이하, 본 발명의 실시예를 첨부된 도면을 참조해서 상세히 설명하면 다음과 같다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 의한 철근의 피막 형성방법을 설명하기 위한 공정도이다.1 is a process chart for explaining a film forming method of reinforcing steel according to the present invention.

본 발명은, 철근을 중성세제를 이용하여 세척하는 세척공정(10)과, 세척된 철근의 수분과 세정액을 제거하는 건조공정(20)과, 완전 건조가 이루어진 철근의 표면에 열 경화성 에폭시 수지와 도료를 배합한 도포액을 도포 처리하는 피막형성 공정(30)과, 피막이 형성된 철근에 무기분체 또는 미립의 모래를 분사시켜 수지피막을 고르게 침착시키는 분체도표 및 침착공정(40)과, 피막이 철근에 완벽하게 융착할 수 있도록 열처리하는 열처리 공정(50)으로 이루어진다.The present invention, the washing step (10) for washing the rebar using a neutral detergent, the drying step (20) for removing the water and the washing liquid of the washed rebar, and the heat-curable epoxy resin and A film forming step (30) for applying a coating liquid containing a coating material, a powder diagram and a depositing step (40) for spraying an inorganic powder or fine sand on the steel bar on which the film is formed to evenly deposit the resin film, and the film on the steel bar. It consists of a heat treatment process 50 for heat treatment to be fused completely.

상기 세척공정(10)은, 수십 개의 철근을 적절히 배열하고 부착된 오염물질을 제거하는 세척공정으로 다음공정의 편의를 위하여 병렬로 배치한다. 일정 길이의 철근이 1회에 100∼200개 투입될 수 있도록 패널 형태의 거치대에 철근 각각이 롤링할 수 있도록 탑재하고 노즐을 통하여 세척액을 분사시켜 세척한다. 이 때 사용하는 세척액은 pH 6.5∼7.5 정도의 중성세제를 이용하며 부착된 이물질은 완벽하게 탈락되어야 한다. 거치대는 로울러에 올려있어서 다음 공정에 연속 이송되도록 하고 각 공정의 작업별 이송은 별도의 중앙 제어장치에 의해 통제되도록 한다.The washing step 10 is a washing step of properly arranging dozens of reinforcing bars and removing contaminants attached thereto, and arranged in parallel for the convenience of the next step. Rebars are mounted on panel holders so that the rebars can be inserted at a time. At this time, the washing liquid used is neutral detergent of pH 6.5 ~ 7.5 and attached foreign substances should be completely eliminated. The cradle is mounted on a roller so that it can be continuously transported to the next process, and the work transfer of each process can be controlled by a separate central controller.

상기 건조공정(20)은, 철근에 부착된 수분이나 세정액을 제거하는 공정으로서 자연 탈수 또는 불로워에 의해 강제 탈수할 수도 있다. 탈수된 철근은 약 250℃정도의 건조기에서 미량의 수증기 부분까지 완전히 탈리될 수 있도록 환풍기를 이용하여 수증기의 배출과 냉각을 동시에 시킨다.The drying step 20 is a step of removing water or washing liquid adhering to the reinforcing bar, and may be forcibly dewatered by natural dehydration or blower. The dehydrated rebar is simultaneously discharged and cooled by using a ventilator so that it can be completely desorbed from the dryer at about 250 ° C to a small amount of steam.

상기 피막형성공정(30)은, 완전한 건조가 이루어지고 냉각된 철근에 피막을 입히는 공정으로 환풍기가 설치된 밀폐실내에서 90중량%의 열경화성 에폭시수지와 10중량%의 도료를 배합한 도포액을 노즐을 통하여 분출 도포 처리하되 이 과정에서 농무(mist)형태의 고르고 작은 입자가 형성되어야 하며 도포되고 남은 기류 중의 도료 농무(mist)는 드래인 닥트를 통하여 회수하고 정화된 공기는 환풍기를 이용하여 배기한다. 피막의 두께는 1mm정도(0.8mm - 1.2mm)가 적합하며 이것은 무기분체의 침착이 적절히 이루어지도록 하기 위함이다.The film forming step (30) is a process of coating the rebar with a complete drying, the coating liquid containing 90% by weight of the thermosetting epoxy resin and 10% by weight of the paint in a sealed chamber equipped with a ventilator nozzle Through the spray coating process, even and small particles in the form of mist (mist) should be formed in this process, and the paint mist in the applied air stream is recovered through the drain duct and the purified air is exhausted by using a ventilator. The thickness of the film is about 1mm (0.8mm-1.2mm) is suitable to ensure the deposition of inorganic powder is appropriate.

상기 분체도포 및 침착공정(40)은, 부식방지용 피막이 형성된 철근에 무기분체 또는 미립의 모래를 분사시켜 수지피막에 고르게 침착시키는 공정이다. 이것은 기존의 도료피막이 철근과 콘크리트 사이의 접착력을 감소시키는 원인을 제공하였는데 그러한 단점을 보완하는 공정이기도 하며 단순 도료피막은 쉽게 탈리현상이 일어나지만 수지코팅과 무기분체의 침착은 탈리방지와 접착력 강화의 장점을 갖게 되는 것이다.The powder coating and deposition step 40 is a step of spraying inorganic powder or fine sand on the steel bar on which the anti-corrosion coating film is formed to evenly deposit the resin film. This is the reason why the existing paint coating reduces the adhesion between reinforcing steel and concrete.It is a process that compensates for the shortcomings, and the simple coating coating easily detaches, but the resin coating and the deposition of inorganic powders prevent the detachment and strengthen the adhesion. You will have an advantage.

상기 열처리공정(50)은, 에폭시 수지에 무기분체를 함유한 피막이 철근에 완벽하게 융착할 수 있도록 고온실에서 처리되는 공정이다. 적정한 온도에서 3∼5분정도 처리하여 경화시키는 것이 좋으며 온도가 너무 높으면 수지가 변성 또는 연소로 인하여 물성이 떨어지고 온도가 너무 낮으면 경화시간이 길어져서 도막이 흐르거나 뭉쳐져서 두께가 고르지 못하게 되는 원인이 된다. 이렇게 처리된 제품은 상온의 공기 중에서 서서히 냉각하여 철근의 피막강도를 강화시키고 품질을 향상시킨다.The heat treatment step 50 is a process that is treated in a high temperature room so that the coating film containing the inorganic powder in the epoxy resin can be perfectly fused to the rebar. It is good to cure it for 3 ~ 5 minutes at the proper temperature. If the temperature is too high, the resin will lose its physical properties due to denaturation or combustion, and if the temperature is too low, the curing time will be prolonged, resulting in uneven thickness due to flowing or agglomeration. do. Products treated in this way are gradually cooled in air at room temperature to strengthen the film's film strength and improve quality.

이에 따라 본 발명에 의하면, 철근의 표면에 에폭시 수지와 도료의 혼합 피막을 도포한후, 분체 도포 및 침착 공정 및 열처리공정을 거쳐서 부식방지는 물론 콘트리트와의 접착력을 향상시킬 수 있는 피막을 형성할 수 있게 된다.Accordingly, according to the present invention, after coating the mixed film of the epoxy resin and the paint on the surface of the rebar, through the powder coating and deposition process and heat treatment process to form a coating that can prevent corrosion as well as improve adhesion to the concrete It becomes possible.

본 발명은 응용분야로서 판상, 관상의 철재 등 모든 분야에 활용할 수 있으며, 본 발명의 실시예로서 설명하지는 않았지만 철재의 표면에 피막을 형성하는 모든 분야에 응용이 가능하다.The present invention can be applied to all fields such as plate and tubular steel as an application field, and is not described as an embodiment of the present invention.

이상에서 설명한 바와 같이 본 발명에 의하면, 에폭시 수지와 도료를 혼합하여 피막 처리를 하므로써 부식 방지용 피막을 형성할 수 있으며, 수지 코팅과 무기분체의 침착으로 인하여 탈리 방지와 접착력 강화의 효과가 있다. 또한, 분체 도포 및 침착 공정 후에 고온 열처리를 하여 상온에서 서서히 냉각시킴으로써, 철근의 피막 강도를 강화시키고 품질을 향상시키는 효과가 있다.As described above, according to the present invention, an anti-corrosion coating can be formed by mixing an epoxy resin and a paint to form a coating treatment, and there is an effect of preventing peeling and strengthening adhesion due to deposition of a resin coating and an inorganic powder. In addition, by performing a high temperature heat treatment after the powder coating and deposition process to gradually cool at room temperature, there is an effect of strengthening the film strength of the reinforcing bar and improving the quality.

Claims (3)

철근을 중성세제를 이용하여 세척하는 세척공정(10)과,Washing process (10) for washing the reinforcement using a neutral detergent, 세척된 철근의 수분과 세정액을 제거하는 건조공정(20)과,A drying step 20 of removing the water and the washing solution of the washed rebar; 건조가 이루어진 철근의 표면에 열 경화성 에폭시 수지와 도료를 배합한 도포액을 도포 처리하는 피막형성공정(30)과,A film forming step (30) for applying a coating liquid containing a thermosetting epoxy resin and a paint on the surface of the dried rebar; 피막이 형성된 철근에 무기분체 또는 미립의 모래를 분사시켜 수지피막을 고르게 침착시키는 분체도표 및 침착공정(40)과,A powder diagram and a deposition step 40 for evenly depositing a resin film by spraying inorganic powder or fine sand on a film formed rebar; 피막이 철근에 완벽하게 융착할 수 있도록 열처리하는 열처리 공정(50)으로 이루어진 것을 특징으로 하는 철근의 부식방지 및 접착력 향상을 위한 피막도포방법.Coating method for preventing corrosion and improving adhesion of the reinforcing steel bar, characterized in that the heat treatment step (50) consisting of a heat treatment so that the film is completely fused to the steel bar. 제 1 항에 있어서, 상기 피막형성 공정(30)은,The method of claim 1, wherein the film forming step (30), 건조가 이루어지고 냉각된 철근을 환풍기가 설치된 밀폐실내에 거치하고, 90중량%의 열경화성 에폭시수지와 10중량%의 도료를 배합한 도포액을 상기 철근의 표면에 도포하되,The dried and cooled rebar is placed in a sealed room equipped with a ventilator, and a coating liquid containing 90 wt% thermosetting epoxy resin and 10 wt% paint is applied to the surface of the reinforcing bar, 상기 도포액은 농무(mist) 형태의 고르고 작은 입자가 형성되도록 노즐을 통하여 분출 도포 처리하며, 남은 기류 중의 도료 농무(mist)는 드래인 닥트를 통하여 회수하고 정화된 공기는 환풍기를 이용하여 배기하여 피막의 두께가 0.8 mm - 1.2mm가 되도록 도포하는 것을 특징으로 하는 철근의 부식방지 및 접착력 향상을 위한 피막 도포 방법.The coating solution is sprayed through a nozzle to form even and small particles in the form of a mist, and the paint mist in the remaining air stream is recovered through a drain duct, and the purified air is exhausted using a ventilator. A coating method for preventing corrosion and improving adhesion of reinforcing bars, characterized in that the coating is applied so that the thickness of the coating is 0.8 mm-1.2 mm. 제1항에 있어서, 상기 열처리공정(50)은,According to claim 1, wherein the heat treatment step 50, 에폭시 수지에 무기분체를 함유한 피막이 철근에 완벽하게 융착할 수 있도록 고온실에서, 수지가 변성 또는 연소되지 않는 고온과 경화시간이 길어져서 도막이 흐르거나 뭉쳐져서 두께가 고르지 못하게 되는 저온을 고려하여 결정된 적정한 온도로 3∼5분 정도 처리하여 경화시키고, 상온의 공기 중에서 서서히 냉각하는 것을 특징으로 하는 철근의 부식방지 및 접착력 향상을 위한 피막 도포 방법.In the high-temperature room, the resin containing inorganic powder in epoxy resin can be perfectly fused to the reinforcing bar, and it is determined in consideration of the low temperature where the resin is not modified or burned and the curing time is long and the coating film flows or aggregates, resulting in uneven thickness. A coating method for preventing corrosion and improving adhesion of reinforcing steel bars, which is treated by curing at an appropriate temperature for about 3 to 5 minutes and gradually cooled in air at room temperature.
KR1019990023062A 1999-06-18 1999-06-18 Membrance coating method for improving adhesive strength and prevent corrosion of iron reinforce KR20010002974A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020071989A (en) * 2001-03-08 2002-09-14 송한태 The method painting of metal a steel for a shutter door

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5672058A (en) * 1979-11-17 1981-06-16 Tokyo Silicone Kk Wear-resistant paint
JPS60222176A (en) * 1985-03-12 1985-11-06 Mitsubishi Heavy Ind Ltd Painting method of inferior surface
JPH04135674A (en) * 1990-09-28 1992-05-11 Nippon Steel Corp Coated steel material
JPH06120657A (en) * 1992-10-01 1994-04-28 Hitachi Chem Co Ltd Production of metal base board
KR950013591A (en) * 1993-11-17 1995-06-15 이승재 Reinforcing Bar Anticorrosion Coating
US8201373B2 (en) * 2009-09-09 2012-06-19 Charles Jr Kenneth L Liner for concrete forms

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5672058A (en) * 1979-11-17 1981-06-16 Tokyo Silicone Kk Wear-resistant paint
JPS60222176A (en) * 1985-03-12 1985-11-06 Mitsubishi Heavy Ind Ltd Painting method of inferior surface
JPH04135674A (en) * 1990-09-28 1992-05-11 Nippon Steel Corp Coated steel material
JPH06120657A (en) * 1992-10-01 1994-04-28 Hitachi Chem Co Ltd Production of metal base board
KR950013591A (en) * 1993-11-17 1995-06-15 이승재 Reinforcing Bar Anticorrosion Coating
US8201373B2 (en) * 2009-09-09 2012-06-19 Charles Jr Kenneth L Liner for concrete forms

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020071989A (en) * 2001-03-08 2002-09-14 송한태 The method painting of metal a steel for a shutter door

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