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그래핀을 활용한 폴리머 도막재료의 물리적 특성 평가 (Airtightness performance evaluation of ultra-high performance concrete using polymer coating materials )

  • 이현승;김강민;윤섭;서태석
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2023년도 가을학술발표대회논문집
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    • pp.257-258
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    • 2023
  • In this study, it was conducted to improve the physical properties of VAE polymer matrix used as a coating material. A nanocomposite was manufactured using graphene as a reinforcing agent based on a VAE matrix. As a result, improvements in tensile strength, adhesion strength, and porosity were confirmed.

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주차장 바닥 줄눈 생략을 위한 초저수축 콘크리트 물성 평가 (Evaluation of Properties of Ultra-Low Shrinkage Concrete for Omission of Paking Lot Floor Joint)

  • 김강민;이현승;윤섭;서태석
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2022년도 봄 학술논문 발표대회
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    • pp.194-195
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    • 2022
  • The jointing of unsupported concrete on the parking lot floor is a process for cracking and stress relief due to concrete drying shrinkage and restraint, but curling occurs due to long-term drying shrinkage after the initial age. will be lowered Therefore, by using an expansion material and a shrinkage reducing agent, the dry shrinkage of concrete is realized to 200 με or less.

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수축저감제 혼입량에 따른 건조수축 특성 검토 (Study on Properties of Dry Shrinkage according to Amount of Shrinkage Reduction Agent)

  • 서태석;이현승;김강민;윤섭
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2021년도 봄 학술논문 발표대회
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    • pp.209-210
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    • 2021
  • This study aims to develop ultra-low-shrinkage high-quality concrete. Therefore, the concrete drying shrinkage characteristics according to the type and amount of the shrinkage reducing agent were reviewed. As a result, the performance of Hexylene Glycol(HG) and Polyol was superior to that of PolyEthylene Glycol(PEG), which is most widely used in Korea. In addition, the shrinkage reduction effect was improved as the amount of PEG was increased, but the disadvantage of the strength reduction when excessive use was confirmed.

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업계소식

  • 한국레미콘공업협회
    • 레미콘
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    • 12호통권10호
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    • pp.101-102
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    • 1986
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그래핀 혼입 초고강도 콘크리트의 물성에 대한 실험적 연구 (Experimental study on the properties of UHPC mixed with graphene)

  • 서태석;이현승;김강민
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2022년도 가을 학술논문 발표대회
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    • pp.199-200
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    • 2022
  • In this study, the material properties of UHPC mixed with graphene was investigated. The compressive strength, the bending strength and the permeability test was conducted. As a result, there was no improvement in compressive strength by the graphene, but the bending strength increased by 20% by the graphene. The water penetration amount decreased by 80% by the graphene.

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현장적용을 통한 초 저수축 콘크리트의 성능 검토 (Performance review of ultra-low shrinkage concrete by field application)

  • 김강민;이현승;서태석
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2022년도 가을 학술논문 발표대회
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    • pp.211-212
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    • 2022
  • In this study, the cracking control performance of ultra-low shrinkage concrete was investigated by the field application. As a result, drying shrinkage crack occurred in normal concrete wall, but no crack occurred in ultra-low shrinkage concrete wall. It is determined that the drying shrinkage crack control effect of the ultra-low shrinkage concrete is excellent.

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잔골재 중 토분이 모르타르의 기초적 특성에 미치는 영향 (The Effect of Soil on the Fundamental Properties of Mortar in Fine Aggregate)

  • 신세준;이제현;박경택;박민용;한민철;한천구
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2019년도 추계 학술논문 발표대회
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    • pp.83-84
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    • 2019
  • Recently, the supply and demand of aggregates has become difficult due to various practical constraints such as depletion of natural aggregate resources and tightening environmental regulations. As a result, aggregates such as selective crushed aggregates and river aggregates are now distributed to the construction market. In particular, among the aggregates distributed in the country, selective crushed aggregates that have been used recently are characterized by the fact that the quality of the raw material is not uniform and is based on geological characteristics. Such bad aggregates can affect the overall performance of the concrete and shorten the life of the structure. Therefore, in this study, in order to improve such problems, we want to analyze the effect of aggregate powder on mortar.

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초 저수축 콘크리트의 수축특성에 관한 실험적 연구 (An Experimental Study on the Shrinkage Properties of Ultra-Low Shrinkage Concrete)

  • 서태석;김강민;이현승
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2021년도 가을 학술논문 발표대회
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    • pp.148-149
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    • 2021
  • In Japan, ultra-low shrinkage concrete has been developed and commercialized to control drying shrinkage cracks to the limit. However, in the case of South Korea, the study on this technology has not yet been conducted in earnest. Therefore, the study was conducted for the development of ultra-low shrinkage concrete to control the drying shrinkage crack of concrete to the limit, and in this study, after determining the mixture of ultra-low shrinkage concrete, a wall type mock-up specimen was produced to observe the shrinkage behavior of ultra-low shrinkage concrete.

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폐어망을 섬유로 활용한 폴리머 보수 모르타르의 기초 특성 연구 (A Study on the Basic Properties of Polymer Repair Mortar Using Waste Fishing Nets as Fibers)

  • 김진영;박종호
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2023년도 가을학술발표대회논문집
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    • pp.83-84
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    • 2023
  • In this study, in order to utilize waste fishing net as a building materail, the possibility of replacing the fiber used in polymer repair mortar with waste fishing net fiber was confirmed. As for basic characteristics, flow, compressive strength, and flexural strength tests were performed to compare and analyze fiber performance, and the test results showed performance equal to or better than existing fibers.

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