KR102299003B1 - Manhole cover having improved performance - Google Patents

Manhole cover having improved performance Download PDF

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KR102299003B1
KR102299003B1 KR1020210059827A KR20210059827A KR102299003B1 KR 102299003 B1 KR102299003 B1 KR 102299003B1 KR 1020210059827 A KR1020210059827 A KR 1020210059827A KR 20210059827 A KR20210059827 A KR 20210059827A KR 102299003 B1 KR102299003 B1 KR 102299003B1
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manhole cover
reinforcing material
experimental example
reinforcing
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KR1020210059827A
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Korean (ko)
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권세현
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권세현
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/14—Covers for manholes or the like; Frames for covers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
    • B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
    • B05D3/065—After-treatment
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/002—Priming paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2200/00—Geometrical or physical properties
    • E02D2200/16—Shapes
    • E02D2200/1607—Shapes round, e.g. circle

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)

Abstract

The present invention relates to a manhole cover with improved performance such as lightness, corrosion resistance, and mechanical properties. A manhole cover, which is one aspect of the present invention, has a light weight unlike a manhole cover made of cast iron, and thus is easy to be transported and installed. In addition, the manhole cover, unlike a manhole cover made of cast iron, is free from durability reduction problem by corrosion. Moreover, the manhole cover does not experience a separation phenomenon of a reinforcing material from a rebar due to great binding force between the rebar and the reinforcing material, and thereby has an excellent mechanical properties. The manhole cover comprises a center support unit including the rebar and the reinforcing unit including a reinforcing material placed on the center support unit.

Description

성능이 개선된 맨홀 덮개{MANHOLE COVER HAVING IMPROVED PERFORMANCE}MANHOLE COVER HAVING IMPROVED PERFORMANCE

본 발명은 경량성, 내부식성, 기계적 특성 등의 성능이 우수한 맨홀 덮개에 관한 것이다.The present invention relates to a manhole cover having excellent performance such as light weight, corrosion resistance, and mechanical properties.

맨홀이란 지하에 매설된 수도관이나 하수관, 배선 등을 검사, 수리 또는 청소하기 위하여 사람이 드나들 수 있게 만든 구멍을 의미한다. 맨홀이 지상부와 닿는 상단부는 사람이나 차량 등의 추락을 방지하기 위해 맨홀 덮개를 이용하여 막게된다. 일반적인 맨홀 덮개는 주철로 제조되는데, 주철로 제조된 맨홀 덮개는 시간이 경과함에 따라 외부 환경에 의하여 부식되어 쉽게 갈라지거나 부서지는 등 내구성이 저하되어 안전상 문제가 있고, 사용 수명도 짧다는 단점이 있다. 이에, 최근에는 이러한 단점을 개선하기 위하여, FRP(fiber reinforced plastics)를 활용하여 제조한 맨홀 덮개가 개발된 바 있으나, 맨홀 덮개가 기본적으로 갖추어야할 성능인 기계적 물성이 맨홀 덮개에 비하여 열위에 있고, 유리 섬유 또는 필라멘트와 플라스틱 수지간의 결합력이 낮아 내구성이 낮다는 문제가 발견되었다.A manhole means a hole made for a person to enter and exit to inspect, repair, or clean a water pipe, sewage pipe, wiring, etc. buried underground. The upper part where the manhole touches the ground is blocked by using a manhole cover to prevent people or vehicles from falling. A general manhole cover is made of cast iron, but the manhole cover made of cast iron is corroded by the external environment over time, and the durability is deteriorated such as easily cracked or broken, and there is a problem in safety and the service life is short. . Therefore, in recent years, in order to improve this drawback, a manhole cover manufactured using fiber reinforced plastics (FRP) has been developed, but the mechanical properties, which are the basic performance of the manhole cover, are inferior to those of the manhole cover, It has been found that the bonding strength between the glass fiber or filament and the plastic resin is low, so that the durability is low.

KR 10-2103539 BKR 10-2103539 B

일 측면에서 본 발명의 목적은 경량화된 맨홀 덮개를 제공하는 것이다.In one aspect, it is an object of the present invention to provide a lightweight manhole cover.

일 측면에서 본 발명의 목적은 보강재(보강 물질)의 철근으로부터의 탈리 현상을 최소화하는 것이다.In one aspect, an object of the present invention is to minimize the detachment phenomenon of the reinforcing material (reinforcing material) from the reinforcing bar.

일 측면에서 본 발명의 목적은 반영구적인 맨홀 덮개를 제공하는 것이다.It is an object of the present invention in one aspect to provide a semi-permanent manhole cover.

일 측면에서 본 발명의 목적은 기계적 물성이 우수한 맨홀 덮개를 제공하는 것이다. In one aspect, an object of the present invention is to provide a manhole cover with excellent mechanical properties.

본 발명의 목적은 상기된 바와 같은 기술적 과제로 한정되지 않으며, 이하의 설명으로부터 또 다른 기술적 과제가 도출될 수 있다.The object of the present invention is not limited to the technical problem as described above, and another technical problem may be derived from the following description.

상기 목적을 달성하기 위하여 본 발명은 일 측면에서 철근을 포함하는 중앙 지지부(11); 및 상기 중앙 지지부에 타설된 보강 물질을 포함하는 보강부(12)를 포함하며, 상기 철근은, 프라이머제 총 중량을 기준으로, 0.1~1 중량%의 광개시제; 30~50 중량%의 불포화폴리에스테르; 및 20~40 중량%의 아크릴레이트류를 포함하는 프라이머제에 침지된 후 자외선 조사 처리 된 것을 포함하며, 상기 자외선 조사 처리는, 500~900 mJ/cm2의 광량으로 30~60초간 수행하는 것을 포함하며, 상기 보강 물질은, 보강 물질 총 중량을 기준으로, 15~25 중량%의 유리 섬유; 35~45 중량%의 불포화 폴리에스테르; 1~5 중량%의 카본 섬유; 5~15 중량%의 아크릴레이트류; 및 1~5 중량%의 시멘트를 포함하는 맨홀 덮개를 제공한다.In order to achieve the above object, the present invention includes a central support 11 including a reinforcing bar in one side; and a reinforcing portion 12 comprising a reinforcing material poured into the central support portion, wherein the reinforcing bar includes, based on the total weight of the primer, 0.1 to 1% by weight of a photoinitiator; 30-50% by weight of unsaturated polyester; And after being immersed in a primer containing 20 to 40% by weight of acrylates, including a UV irradiation treatment, the UV irradiation treatment, 500 ~ 900 mJ / cm 2 It is carried out for 30 to 60 seconds with a light quantity of wherein the reinforcing material comprises, based on the total weight of the reinforcing material, 15 to 25% by weight of glass fibers; 35-45% by weight of an unsaturated polyester; 1-5% by weight of carbon fibers; 5 to 15% by weight of acrylates; and 1-5% by weight of cement.

본 발명의 일 측면인 맨홀 덮개는 주철로 제조한 맨홀 덮개와는 달리 경량성이 우수하여, 운반 및 설치가 용이하다. 또한, 상기 맨홀 덮개는 주철로 제조한 맨홀 덮개와는 달리 부식에 의한 내구성 저하 문제가 없다. 또한, 상기 맨홀 덮개는 철근과 보강 물질간의 결합력이 우수하여, 철근으로부터 보강 물질의 탈리 현상이 없어, 기계적 물성이 우수하다.Unlike the manhole cover made of cast iron, the manhole cover, which is an aspect of the present invention, has excellent light weight, and is easy to transport and install. In addition, the manhole cover does not have a problem of deterioration of durability due to corrosion, unlike the manhole cover made of cast iron. In addition, the manhole cover is excellent in bonding strength between the reinforcing bar and the reinforcing material, there is no detachment of the reinforcing material from the reinforcing bar, and has excellent mechanical properties.

도 1은 본 발명의 일 측면인 맨홀 덮개의 평면도이다.1 is a plan view of a manhole cover, which is an aspect of the present invention.

이하에서, 각 구성을 보다 상세히 설명하나, 이는 하나의 예시에 불과할 뿐, 본 발명의 권리범위가 다음 내용에 의해 제한되지 아니한다.Hereinafter, each configuration will be described in more detail, but this is only an example, and the scope of the present invention is not limited by the following content.

본 발명의 명세서 및 청구범위에 사용된 용어 또는 단어는 통상적이거나 사전적인 의미로 한정 해석되지 아니하며, 발명자는 그 자신의 발명을 가장 최선의 방법으로 설명하기 위해 용어의 개념을 적절하게 정의할 수 있다는 원칙에 입각하여 본 발명의 기술적 사상에 부합하는 의미와 개념으로 해석되어야만 한다.The terms or words used in the specification and claims of the present invention are not to be construed as limited in their ordinary or dictionary meanings, and the inventor may appropriately define the concept of the term in order to best describe his invention. Based on the principle, it should be interpreted as meaning and concept consistent with the technical idea of the present invention.

본 발명의 명세서 전체에 있어서, 어떤 부분이 어떤 구성 요소를 "포함" 한다고 할 때, 이는 특별히 반대되는 기재가 없는 한 다른 구성 요소를 제외하는 것이 아니라 다른 구성 요소를 더 포함할 수 있는 것을 의미한다.In the entire specification of the present invention, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components unless otherwise stated. .

본 발명은 일 측면에서 철근을 포함하는 중앙 지지부(11); 및 상기 중앙 지지부에 타설된 보강 물질을 포함하는 보강부(12)를 포함하며, 상기 철근은, 프라이머제 총 중량을 기준으로, 0.1~1 중량%의 광개시제; 45~55 중량%의 불포화폴리에스테르; 및 20~40 중량%의 아크릴레이트류를 포함하는 프라이머제에 침지된 후 자외선 조사 처리 된 것을 포함하며, 상기 자외선 조사 처리는, 500~900 mJ/cm2의 광량으로 30~60초간 수행하는 것을 포함하며, 상기 보강 물질은, 보강 물질 총 중량을 기준으로, 15~25 중량%의 유리 섬유; 35~45 중량%의 불포화 폴리에스테르; 1~5 중량%의 카본 섬유; 5~15 중량%의 아크릴레이트류; 및 1~5 중량%의 시멘트를 포함하는 맨홀 덮개이다.The present invention includes a central support (11) comprising a reinforcing bar in one side; and a reinforcing portion 12 comprising a reinforcing material poured into the central support portion, wherein the reinforcing bar includes, based on the total weight of the primer, 0.1 to 1% by weight of a photoinitiator; 45 to 55% by weight of an unsaturated polyester; And after being immersed in a primer containing 20 to 40% by weight of acrylates, including a UV irradiation treatment, the UV irradiation treatment, 500 ~ 900 mJ / cm 2 It is carried out for 30 to 60 seconds with a light quantity of wherein the reinforcing material comprises, based on the total weight of the reinforcing material, 15 to 25% by weight of glass fibers; 35-45% by weight of an unsaturated polyester; 1-5% by weight of carbon fibers; 5 to 15% by weight of acrylates; and 1-5% by weight of cement.

본 명세서에서 상기 "보강부"는 맨홀 덮개 성형시 금형 몰드 내에 주입되는 보강 물질로 구성된다.In the present specification, the "reinforcement part" is composed of a reinforcing material injected into the mold when the manhole cover is molded.

일 측면에서, 상기 "프라이머제"는 철근에 코팅되어 프라이머제가 코팅된 철근과 보강 물질의 결합력을 강화시키는 제재(agent)를 의미할 수 있다.In one aspect, the "primer agent" may refer to an agent that is coated on the reinforcing bar to strengthen the bonding force between the reinforcing bar and the reinforcing material coated with the primer agent.

일 측면에서, 상기 프라이머제는, 프라이머제 총 중량을 기준으로, 0.1~1 중량%의 광개시제, 35~45 중량%의 불포화폴리에스테르 및 45~55 중량%의 아크릴레이트류를 포함할 수 있다.In one aspect, the primer agent, based on the total weight of the primer agent, 0.1 to 1% by weight of the photoinitiator, 35 to 45% by weight of the unsaturated polyester and 45 to 55% by weight of acrylates may include.

상기 프라이머제에 포함되는 광개시제는, 프라이머제 총 중량을 기준으로, 0.1~1 중량%, 또는 0.3~0.7 중량%로 포함될 수 있다.The photoinitiator included in the primer agent may be included in an amount of 0.1 to 1 wt%, or 0.3 to 0.7 wt%, based on the total weight of the primer.

상기 광개시제는, 2,4,6-트리메틸벤조일 디페닐포스핀옥사이드, 메틸벤조일포메이트, 1-히드록시싸이크로헥실페닐케톤, 2-메틸-1-[4-(메틸티오)페닐]-2-모르폴리노프로판-1-온, 2-벤질-2-N,N-디메틸아미노-1-(4-모르폴리노페닐)-1-부탄온, 1-히드록시싸이클로헥실페닐 케톤, 벤조페논, 2,2-디메톡시-2-페닐 아세토페논, 비스(2,6-디메톡시벤조일-2,4,4-트리메틸페닐) 포스핀옥사이드, 2-히드록시-2-메틸-1-페닐-프로판-1-온, 비스(2,4,6-트리메틸벤조일)페닐포스핀옥사이드, 2-히드록시-2-메틸-1-페닐-1-프로판, 2,4,6-트리메틸벤조일디페닐-포스핀옥사이드, 2-히드록시-2-메틸-1-페닐-프로판-1-온 또는 2,4,6-트리메틸벤조일디페닐포스핀 옥사이드, 아조비스이소부티로니트릴 등을 포함할 수 있으나, 이에 제한되는 것은 아니다.The photoinitiator is 2,4,6-trimethylbenzoyl diphenylphosphine oxide, methylbenzoyl formate, 1-hydroxycyclohexylphenylketone, 2-methyl-1-[4-(methylthio)phenyl]-2 -morpholinopropan-1-one, 2-benzyl-2-N,N-dimethylamino-1-(4-morpholinophenyl)-1-butanone, 1-hydroxycyclohexylphenyl ketone, benzophenone , 2,2-dimethoxy-2-phenyl acetophenone, bis (2,6-dimethoxybenzoyl-2,4,4-trimethylphenyl) phosphine oxide, 2-hydroxy-2-methyl-1-phenyl- Propan-1-one, bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide, 2-hydroxy-2-methyl-1-phenyl-1-propane, 2,4,6-trimethylbenzoyldiphenyl- phosphine oxide, 2-hydroxy-2-methyl-1-phenyl-propan-1-one or 2,4,6-trimethylbenzoyldiphenylphosphine oxide, azobisisobutyronitrile, and the like; However, the present invention is not limited thereto.

또한, 일 측면에서 상기 프라이머제에 포함된 불포화 폴리에스테르는, 프라이머제 총 중량을 기준으로 35~45 중량%, 또는 37~42 중량%로 포함될 수 있다.In addition, in one aspect, the unsaturated polyester contained in the primer agent may be included in an amount of 35 to 45 wt%, or 37 to 42 wt%, based on the total weight of the primer agent.

또한, 상기 프라이머제의 아크릴레이트류는 프라이머제 총 중량을 기준으로 45~55 중량%, 또는 47~52 중량%로 포함될 수 있다.In addition, the acrylates of the primer agent may be included in an amount of 45 to 55% by weight, or 47 to 52% by weight, based on the total weight of the primer.

한편, 상기 철근은, 상기 프라이머제에 침지한 후 자외선 조사 처리한 것을 포함할 수 있다.On the other hand, the reinforcing bar, after immersion in the primer agent may include a UV irradiation treatment.

이 때 상기 자외선 조사 처리는, 500~900 mJ/cm2의 광량으로 30~60초간 수행하는 것을 포함할 수 있으며, 또는 600~800mJ/cm2의 광량으로 30~50초간 수행하는 것, 또는 650~750mJ/cm2의 광량으로 40~50초간 수행하는 것을 포함할 수 있다.At this time, to perform the UV irradiation treatment, 500 ~ 900 mJ / cm, and can include performing second light quantity from 30 to 60 seconds of, or 600 and the light quantity of 800mJ / cm 2 30 ~ 50 seconds, or 650 ~750mJ/cm 2 It may include performing for 40-50 seconds with an amount of light.

또한, 일 측면에서, 상기 자외선 조사 처리는 650~750mJ/cm2의 광량으로 40~50초간 수행한 후 500~600mJ/cm2의 광량으로 1~10초간 수행하는 것을 포함할 수 있다.Furthermore, in one aspect, the ultraviolet ray irradiation processing may include performing 650 after performing 40 ~ 50 seconds in an amount of light of 750mJ / cm 2 as a light amount of 500 ~ 600mJ / cm 2 1 ~ 10 seconds.

일 측면에서, 상기 맨홀 덮개는 맨홀 덮개 성형에 사용되는 금형 몰드 내부 공간에 상기 철근을 배치한 후, 보강 물질을 주입하여 성형한 것을 포함할 수 있다.In one aspect, the manhole cover may include molding by injecting a reinforcing material after disposing the reinforcing bar in the inner space of the mold mold used for forming the manhole cover.

상기 철근은 바람직하게 격자 모양으로 배열될 수 있으나, 이에 제한되는 것은 아니다.The reinforcing bars may preferably be arranged in a grid shape, but is not limited thereto.

일 측면에서, 상기 보강 물질은, 보강 물질 총 중량을 기준으로, 15~25 중량%의 유리 섬유; 35~45 중량%의 불포화 폴리에스테르; 1~5 중량%의 카본 섬유; 5~15 중량%의 아크릴레이트류; 및 1~5 중량%의 시멘트를 포함할 수 있다. In one aspect, the reinforcing material comprises, based on the total weight of the reinforcing material, 15-25 wt % glass fiber; 35-45% by weight of an unsaturated polyester; 1-5% by weight of carbon fibers; 5 to 15% by weight of acrylates; and 1 to 5% by weight of cement.

상기 유리 섬유는 보강 물질 총 중량을 기준으로 15~25 중량%, 또는 17~23 중량% 또는 19~21 중량%로 포함될 수 있다.The glass fiber may be included in an amount of 15 to 25% by weight, or 17 to 23% by weight, or 19 to 21% by weight based on the total weight of the reinforcing material.

또한, 상기 보강 물질의 불포화 폴리에스테르는 보강 물질 총 중량을 기준으로 37~43 중량%, 또는 38~42 중량%로 포함될 수 있다.In addition, the unsaturated polyester of the reinforcing material may be included in an amount of 37 to 43 wt%, or 38 to 42 wt%, based on the total weight of the reinforcing material.

또한, 상기 카본 섬유는 보강 물질 총 중량을 기준으로 1~5 중량%, 또는 2~4 중량%로 포함될 수 있다.In addition, the carbon fiber may be included in an amount of 1 to 5% by weight, or 2 to 4% by weight based on the total weight of the reinforcing material.

또한, 상기 보강 물질의 아크릴레이트류는 보강 물질 총 중량을 기준으로 5~15 중량%, 또는 7~13 중량%, 또는 9~11 중량%로 포함될 수 있다.In addition, the acrylates of the reinforcing material may be included in an amount of 5 to 15 wt%, or 7 to 13 wt%, or 9 to 11 wt%, based on the total weight of the reinforcing material.

또한, 상기 시멘트는 보강 물질의 총 중량을 기준으로 1~ 5 중량%, 또는 2~4 중량%로 포함될 수 있다.In addition, the cement may be included in an amount of 1 to 5% by weight, or 2 to 4% by weight based on the total weight of the reinforcing material.

일 측면에서, 상기 프라이머제와 보강 물질의 아크릴레이트류는 1,6-헥산다이올다이아크릴레이트, 트리프로필렌글리콜다이아크릴레이트, 및 트리메틸올프로판트리아크릴레이트를 포함할 수 있다.In one aspect, the acrylates of the primer and the reinforcing material may include 1,6-hexanediol diacrylate, tripropylene glycol diacrylate, and trimethylolpropane triacrylate.

상기 1,6-헥산다이올다이아크릴레이트, 트리프로필렌글리콜다이아크릴레이트, 및 트리메틸올프로판트리아크릴레이트는, 각각 순서대로 1:5~15:3~7의 중량비율, 또는 1:7~13:4~6의 중량비율, 또는 1:9~11:4~6의 중량비율로 포함될 수 있다.The 1,6-hexanediol diacrylate, tripropylene glycol diacrylate, and trimethylol propane triacrylate are, respectively, in a weight ratio of 1:5-15:3-7, or 1:7-13 in order. It may be included in a weight ratio of: 4 to 6, or 1:9 to 11:4 to 6 by weight.

또한, 일 측면에서, 상기 보강 물질은 비스무스 카복실레이트 및 지르코늄 카복실레이트를 더 포함할 수 있다.Also, in one aspect, the reinforcing material may further include bismuth carboxylate and zirconium carboxylate.

이 때, 상기 비스무스 카복실레이트 및 지르코늄 카복실레이트의 총량은 보강 물질 총 중량을 기준으로, 1~5 중량%일 수 있고, 또는 2~4 중량%일 수 있다.In this case, the total amount of the bismuth carboxylate and zirconium carboxylate may be 1 to 5 wt%, or 2 to 4 wt%, based on the total weight of the reinforcing material.

상기 비스무스 카복실레이트 및 지르코늄 카복실레이트는 순서대로 1:1~3의 중량비율, 또는 1:1.5~2.5의 중량비율로 포함될 수 있다.The bismuth carboxylate and zirconium carboxylate may be included in a weight ratio of 1:1 to 3, or a weight ratio of 1:1.5 to 2.5 in order.

또한, 상기 보강 물질은, 상기 성분들 외에도 규사, 탄산 칼슘과 같은 필러, 폴리에스테르와 같은 수지류를 더 포함할 수 있다.In addition, the reinforcing material may further include silica sand, fillers such as calcium carbonate, and resins such as polyester, in addition to the above components.

또한, 상기 맨홀 덮개 제조시, 필요에 의해 자외선 경화 등에 사용될 수 있는 시중의 성분을 적의선정하여 적량 더 포함할 수 있다.In addition, when manufacturing the manhole cover, if necessary, commercially available ingredients that can be used for UV curing, etc. may be appropriately selected and further included in an appropriate amount.

일 측면에서, 상기 맨홀 덮개는 중앙 지지부에 상기 보강 물질을 타설한 후 BMC 성형 방식으로 압축 성형 또는 사출 성형된 것을 포함할 수 있다.In one aspect, the manhole cover may include compression-molded or injection-molded in a BMC molding method after pouring the reinforcing material to the central support.

또한, 상기 맨홀 덮개는 원형 또는 사각형일 수 있으나, 제한되는 것은 아니다.In addition, the manhole cover may have a circular or rectangular shape, but is not limited thereto.

일 측면에서, 본 발명은 맨홀 덮개를 제조하는 방법으로서, 상기 방법은, 중앙 지지부를 구성하는 철근을 프라이머제에 침지하는 단계; 맨홀 덮개 성형을 위한 금형 몰드에 상기 철근을 배열하는 단계; 상기 철근이 배열된 금형 몰드에 보강 물질을 첨가하고 성형하는 단계를 포함할 수 있다.In one aspect, the present invention is a method for manufacturing a manhole cover, the method comprising the steps of: immersing the reinforcing bar constituting the central support in a primer; arranging the reinforcing bar in a mold for forming a manhole cover; It may include adding a reinforcing material to the mold mold in which the reinforcing bars are arranged and molding.

또한, 상기 방법은, 상기 프라이머제에 침지한 철근을 자외선 조사 처리하는 단계를 더 포함할 수 있다.In addition, the method may further include the step of UV irradiation treatment of the reinforcing bar immersed in the primer agent.

이하, 하기의 제조예, 실시예 및 실험예를 들어 본 발명을 보다 구체적으로 설명한다. 그러나 이들 제조예, 실시예 및 실험예는 본 발명에 대한 이해를 돕기 위해 예시의 목적으로만 제공된 것일 뿐 본 발명의 범주 및 범위가 하기 예에 의해 제한되는 것은 아니다.Hereinafter, the present invention will be described in more detail with reference to the following Preparation Examples, Examples and Experimental Examples. However, these preparation examples, examples and experimental examples are provided only for the purpose of illustration to help the understanding of the present invention, and the scope and scope of the present invention is not limited by the following examples.

[제조예][Production Example]

원형의 맨홀 덮개를 제조하기 위한 금형 몰드를 준비하고, 철근을 격자 모양으로 금형 몰드 내부에 배열하였다.A mold for manufacturing a circular manhole cover was prepared, and reinforcing bars were arranged inside the mold in a grid shape.

철근은, 0.5 중량%의 광개시제, 40 중량%의 불포화 폴리에스테르, 50%의 아크릴레이트, 4.5%의 탄산칼슘, 및 5%의 폴리에테르를 혼합한 프라이머제에 침지한 후, 700mJ/cm2의 광량으로 약 45초간 자외선을 처리한 것을 사용하였다.The reinforcing bar is immersed in a primer containing 0.5% by weight of photoinitiator, 40% by weight of unsaturated polyester, 50% of acrylate, 4.5% of calcium carbonate, and 5% of polyether, and then 700mJ/cm 2 of Ultraviolet rays treated for about 45 seconds were used as the amount of light.

그 후, 금형 몰드 내부에 20 중량%의 유리 섬유, 40 중량%의 불포화 에스테르, 3 중량%의 카본 섬유, 10%의 아크릴레이트, 3%의 시멘트와, 잔량의 폴리에테르를 혼합한 보강 물질을 넣고, BMC 사출기를 이용하여 맨홀 덮개를 성형하였다.Thereafter, a reinforcing material obtained by mixing 20% by weight of glass fiber, 40% by weight of unsaturated ester, 3% by weight of carbon fiber, 10% of acrylate, 3% of cement, and the remaining amount of polyether was added to the inside of the mold. and a manhole cover was molded using a BMC injection machine.

아크릴레이트는, 1,6-헥산다이올다이아크릴레이트, 트리프로필렌글리콜다이아크릴레이트, 및 트리메틸올프로판트리아크릴레이트를 1: 10: 5의 중량비율로 혼합하여 사용하였다. The acrylate was used by mixing 1,6-hexanediol diacrylate, tripropylene glycol diacrylate, and trimethylolpropane triacrylate in a weight ratio of 1: 10: 5.

[실험예] 내하중성 평가[Experimental Example] Load-bearing evaluation

KS D 6021에 준하여 맨홀 덮개의 내하중성을 평가하였다. According to KS D 6021, the load resistance of the manhole cover was evaluated.

그 결과, 제조예의 맨홀 덮개는 약 700KN(kgf)를 가할 때까지 외관상 변화가 없어, 약 700KN의 내하중성이 있음을 확인할 수 있었다.As a result, it was confirmed that the manhole cover of the manufacturing example did not change in appearance until about 700KN (kgf) was applied, and there was a load resistance of about 700KN.

[비교 실험예] [Comparative Experiment Example]

[비교 실험예 1] 자외선 조사에 따른 맨홀 덮개의 내하중성 평가[Comparative Experimental Example 1] Load-bearing evaluation of manhole cover according to UV irradiation

아래 표 1과 같이 자외선 조사의 조건을 변경하여 맨홀 덮개를 제조하고, 실험예와 동일한 실험을 수행하였다.A manhole cover was manufactured by changing the conditions of UV irradiation as shown in Table 1 below, and the same experiment as in the experimental example was performed.

비교실험예 1-1Comparative Experimental Example 1-1 비교실험예 1-2Comparative Experimental Example 1-2 비교실험예 1-3Comparative Experimental Example 1-3 비교실험예 1-4Comparative Experimental Example 1-4 비교실험예 1-5Comparative Experimental Example 1-5 비교실험예 1-6Comparative Experimental Example 1-6 비교실험예 1-7Comparative Experimental Example 1-7 비교실험예 1-8Comparative Experimental Example 1-8 비교실험예 1-9Comparative Experimental Example 1-9 광량(mJ/cm2)Light intensity (mJ/cm 2 ) 자외선 조사 처리 하지 않음No UV irradiation treatment 450450 500500 900900 950950 700700 700700 700700 700700 자외선 조사 시간(초)UV irradiation time (sec) 4545 4545 4545 4545 2828 3030 6060 6565

그 결과, 자외선 조사 처리 하지 않거나, 광량이 500~900 mJ/cm2 을 벗어나거나, 조사 시간이 30~60초를 벗어날 경우에는 제조된 맨홀 덮개의 내하중성이 저하되는 것을 확인할 수 있었다(표 2).As a result, it was confirmed that the load resistance of the manufactured manhole cover was lowered when the UV irradiation treatment was not performed, the amount of light was out of 500 to 900 mJ/cm 2 , or the irradiation time was out of 30 to 60 seconds (Table 2). ).

한편, 일반적인 주철 맨홀 덮개(비교실험예 1-10)의 경우 약 400KN의 내하중성을 확인하였다.On the other hand, in the case of a general cast iron manhole cover (Comparative Experimental Example 1-10), a load resistance of about 400KN was confirmed.

또한, KR 10-2103539 B에 따른 맨홀 덮개(비교실험예 1-11)은 약 450KN의 내하중성을 확인하였다.In addition, the manhole cover (Comparative Experimental Example 1-11) according to KR 10-2103539 B was confirmed to have a load resistance of about 450KN.

비교실험예 1-1Comparative Experimental Example 1-1 비교실험예 1-2Comparative Experimental Example 1-2 비교실험예 1-3Comparative Experimental Example 1-3 비교실험예 1-4Comparative Experimental Example 1-4 비교실험예 1-5Comparative Experimental Example 1-5 비교실험예 1-6Comparative Experimental Example 1-6 비교실험예 1-7Comparative Experimental Example 1-7 비교실험예 1-8Comparative Experimental Example 1-8 비교실험예 1-9Comparative Experimental Example 1-9 내하중성(KN)Load-bearing capacity (KN) 500500 530530 650650 650650 600600 550550 630630 650650 600600

한편, 멘홀 덮개 제조시, 700mJ/cm2의 광량으로 약 45초간 자외선을 처리한 후, 550mJ/cm2의 광량으로 약 5초간 더 자외선 처리(2차 자외선 처리)를 한 경우(나머지 조건은 제조예와 동일, 비교예 1-12)에는, 내하중성이 765KN(kgf)로, 2차 자외선 처리를 하지 않은 경우와 비교하여 약 10% 내하중성이 더 개선됨을 확인할 수 있었다.On the other hand, when manufacturing the manhole cover, after UV treatment for about 45 seconds with a light amount of 700 mJ/cm 2 , UV treatment for about 5 seconds with a light amount of 550 mJ/cm 2 (secondary UV treatment) Same as in Example, Comparative Example 1-12), the load carrying capacity was 765KN (kgf), and it was confirmed that the load carrying capacity was further improved by about 10% compared to the case where the secondary UV treatment was not performed.

[비교 실험예 2] 비스무스 카복실레이트 및 지르코늄 카복실레이트 첨가 여부 및 함량에 따른 맨홀 덮개의 내하중성 평가 [Comparative Experimental Example 2] Load-bearing evaluation of manhole cover according to the presence and content of bismuth carboxylate and zirconium carboxylate

제조예의 보강 물질에 비스무스 카복실레이트 1 중량%와, 지르코늄 카복실레이트 2 중량%를 첨가하는 점만 제외하고 제조예와 동일한 방법으로 맨홀 덮개를 제조(비교 실험예 2-1)하였다. 그 결과, 내하중성이 약 810KN으로 증가함을 확인할 수 있었다.A manhole cover was prepared in the same manner as in Preparation Example except that 1 wt% of bismuth carboxylate and 2 wt% of zirconium carboxylate were added to the reinforcing material of Preparation Example (Comparative Experimental Example 2-1). As a result, it was confirmed that the load-bearing capacity increased to about 810KN.

또한, 아래 표 3과 같이 카복실레이트류의 총량은 3 중량%로 고정하고, 양자의 함량비율을 조절하여 맨홀 덮개를 제조하고 내하중성을 평가하였다.In addition, as shown in Table 3 below, the total amount of carboxylates was fixed to 3% by weight, and a manhole cover was manufactured by adjusting the content ratio of both, and load resistance was evaluated.

비교실험예 2-2Comparative Experimental Example 2-2 비교실험예 2-3Comparative Experimental Example 2-3 비교실험예 2-4Comparative Experimental Example 2-4 비교실험예 2-5Comparative Experimental Example 2-5 비스무스 카복실레이트bismuth carboxylate 1One 1One 1One 1One 지르코늄 카복실레이트Zirconium Carboxylate 1.11.1 1One 33 3.53.5 내하중성(KN)Load-bearing capacity (KN) 710710 770770 790790 720720

또한, 아래 표 4와 같이 비스무스카복실레이트와 지르코늄 카복실레이트의 함량비율을 1:2로 고정하고, 총 함량을 조절하여 맨홀 덮개를 제조하고, 내하중성을 측정하였다.In addition, as shown in Table 4 below, the content ratio of bismuth carboxylate and zirconium carboxylate was fixed to 1:2, the total content was adjusted to prepare a manhole cover, and load resistance was measured.

비교실험예 2-6Comparative Experimental Example 2-6 비교실험예 2-7Comparative Experimental Example 2-7 비교실험예 2-8Comparative Experimental Example 2-8 비교실험예 2-9Comparative Experimental Example 2-9 총함량(중량%)Total content (wt%) 0.50.5 1One 55 5.55.5 내하중성(KN)Load-bearing capacity (KN) 720720 770770 780780 735735

[비교 실험예 3] 아크릴레이트류의 함량 비율에 따른 맨홀 덮개의 내하중성 평가[Comparative Experimental Example 3] Load-bearing evaluation of the manhole cover according to the content ratio of acrylates

아크릴레이트의 함량은 제조예와 동일하게 하고, 아크릴레이트류의 함량비율을 아래 표 5와 같이 달리하여 맨홀 덮개를 제조하고, 내하중성을 평가하였다.The content of acrylate was the same as in Preparation Example, and by varying the content ratio of acrylates as shown in Table 5 below, a manhole cover was manufactured, and load resistance was evaluated.

비교실험예 3-1Comparative Experimental Example 3-1 비교실험예 3-2Comparative Experimental Example 3-2 비교실험예 3-3Comparative Experimental Example 3-3 비교실험예 3-4Comparative Experimental Example 3-4 비교실험예 3-5Comparative Experimental Example 3-5 비교실험예 3-6Comparative Experimental Example 3-6 비교실험예 3-7Comparative Experimental Example 3-7 비교실험예 3-8Comparative Experimental Example 3-8 1,6-헥산다이올다이아크릴레이트1,6-hexanediol diacrylate 1One 1One 1One 1One 1One 1One 1One 1One 트리프로필렌글리콜다이아크릴레이트Tripropylene glycol diacrylate 44 55 1515 1616 1010 1010 1010 1010 트리메틸올프로판트리아크릴레이트trimethylolpropane triacrylate 55 55 55 55 22 33 77 88 내하중성(KN)Load-bearing capacity (KN) 720720 770770 780780 730730 720720 760760 790790 730730

그 결과, 상기 3종의 아크릴레이트류의 함량 비율이 1:5~15:3~7의 범위를 벗어날 경우에는, 맨홀 덮개의 내하중성이 저하됨을 확인할 수 있었다.As a result, when the content ratio of the three types of acrylates was out of the range of 1:5 to 15:3 to 7, it was confirmed that the load resistance of the manhole cover was lowered.

10: 맨홀 덮개
11: 중앙 지지부
12: 보강부10: manhole cover
11: central support
12: reinforcement part

Claims (5)

맨홀 덮개로서,
상기 맨홀 덮개는,
철근을 포함하는 중앙 지지부(11); 및
상기 중앙 지지부에 타설된 보강 물질을 포함하는 보강부(12)를 포함하며,
상기 철근은,
프라이머제 총 중량을 기준으로, 0.1~1 중량%의 광개시제; 35~45 중량%의 불포화폴리에스테르; 및 45~55 중량%의 아크릴레이트류를 포함하는 프라이머제에 침지된 후 자외선 조사 처리 된 것을 포함하며,
상기 자외선 조사 처리는, 500~900 mJ/cm2의 광량으로 30~60초간 수행하는 것을 포함하며,
상기 보강 물질은, 보강 물질 총 중량을 기준으로,
15~25 중량%의 유리 섬유; 35~45 중량%의 불포화 폴리에스테르; 1~5 중량%의 카본 섬유; 5~15 중량%의 아크릴레이트류; 및 1~5 중량%의 시멘트를 포함하는, 맨홀 덮개.As a manhole cover,
The manhole cover is
Central support (11) comprising a reinforcing bar; and
and a reinforcing part (12) comprising a reinforcing material poured into the central support;
The reinforcing bar is
0.1 to 1% by weight of a photoinitiator based on the total weight of the primer; 35 to 45% by weight of an unsaturated polyester; And after being immersed in a primer containing 45 to 55% by weight of acrylates, including those treated with UV irradiation,
The ultraviolet irradiation treatment, 500 ~ 900 mJ / cm 2 It includes performing for 30 to 60 seconds at an amount of light,
The reinforcing material, based on the total weight of the reinforcing material,
15-25% by weight of glass fibers; 35-45% by weight of an unsaturated polyester; 1-5% by weight of carbon fibers; 5 to 15% by weight of acrylates; and 1-5 wt % cement. 제1항에 있어서,
상기 아크릴레이트류는,
1,6-헥산다이올다이아크릴레이트, 트리프로필렌글리콜다이아크릴레이트, 및 트리메틸올프로판트리아크릴레이트를 포함하며,
순서대로, 1: 5~15: 3~7의 중량비율로 포함되는, 맨홀 덮개.According to claim 1,
The acrylates are
1,6-hexanediol diacrylate, tripropylene glycol diacrylate, and trimethylolpropane triacrylate;
Manhole covers, included in a weight ratio of 1: 5-15: 3-7, in that order. 제1항에 있어서,
상기 보강 물질은,
비스무스 카복실레이트 및 지르코늄 카복실레이트를 더 포함하며,
상기 비스무스 카복실레이트 및 지르코늄 카복실레이트의 총량은, 보강 물질 총 중량을 기준으로, 1~5 중량%인, 맨홀 덮개.According to claim 1,
The reinforcing material is
Further comprising bismuth carboxylate and zirconium carboxylate,
The total amount of the bismuth carboxylate and zirconium carboxylate is 1-5% by weight, based on the total weight of the reinforcing material. 제3항에 있어서,
상기 비스무스카복실레이트 및 지르코늄 카복실레이트는, 순서대로
1: 1~3의 중량 비율로 포함되는, 맨홀 덮개.4. The method of claim 3,
The bismuth carboxylate and zirconium carboxylate are in order
Manhole cover, included in a weight ratio of 1: 1 to 3. 제1항에 있어서,
상기 맨홀 덮개는,
중앙 지지부에 보강 물질을 타설한 후 BMC(bulk molding compound) 성형 방식으로 성형된 것을 포함하는, 맨홀 덮개.According to claim 1,
The manhole cover is
A manhole cover comprising one molded by a bulk molding compound (BMC) molding method after pouring a reinforcing material into the central support.
KR1020210059827A 2021-05-10 2021-05-10 Manhole cover having improved performance KR102299003B1 (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003071377A (en) * 2001-08-31 2003-03-11 Nippon Steel Composite Co Ltd Method for strengthening adhesive property of frp grid material for concrete reinforcement, frp grid material for concrete reinforcement and method for reinforcing concrete structure
JP2004131985A (en) * 2002-10-09 2004-04-30 Central Japan Railway Co Reinforcing prepreg sheet and the reinforcing method of concrete construction
KR100949655B1 (en) * 2009-07-13 2010-03-26 장정식 A cover for manhole and method for manufacturing thereof
JP2011143645A (en) * 2010-01-15 2011-07-28 Housetec Inc Artificial marble molding
KR101118712B1 (en) * 2011-10-26 2012-03-12 이근혁 A manhole cover
JP2014034839A (en) * 2012-08-10 2014-02-24 Denki Kagaku Kogyo Kk Slip prevention method of metallic member and slip prevention structure
KR20180115180A (en) * 2017-04-12 2018-10-22 주식회사 아이윌테크 Synthetic resin manhole cover and manufacturing method thereof
KR102103539B1 (en) 2019-07-22 2020-04-22 주식회사 조은세상 Manhole cover with built-in reinforcing material and manufacturing method thereof

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003071377A (en) * 2001-08-31 2003-03-11 Nippon Steel Composite Co Ltd Method for strengthening adhesive property of frp grid material for concrete reinforcement, frp grid material for concrete reinforcement and method for reinforcing concrete structure
JP2004131985A (en) * 2002-10-09 2004-04-30 Central Japan Railway Co Reinforcing prepreg sheet and the reinforcing method of concrete construction
KR100949655B1 (en) * 2009-07-13 2010-03-26 장정식 A cover for manhole and method for manufacturing thereof
JP2011143645A (en) * 2010-01-15 2011-07-28 Housetec Inc Artificial marble molding
KR101118712B1 (en) * 2011-10-26 2012-03-12 이근혁 A manhole cover
JP2014034839A (en) * 2012-08-10 2014-02-24 Denki Kagaku Kogyo Kk Slip prevention method of metallic member and slip prevention structure
KR20180115180A (en) * 2017-04-12 2018-10-22 주식회사 아이윌테크 Synthetic resin manhole cover and manufacturing method thereof
KR102103539B1 (en) 2019-07-22 2020-04-22 주식회사 조은세상 Manhole cover with built-in reinforcing material and manufacturing method thereof

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