한국해안·해양공학회논문집 (Journal of Korean Society of Coastal and Ocean Engineers)

  • 제29권6호
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  • Pages.315-325
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  • 2017
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  • 1976-8192(pISSN)
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  • 2288-2227(eISSN)
한국해안·해양공학회 (Korean Society of Coastal and Ocean Engineers)
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콘크리트 부유구조체 적용을 위한 구조용 경량콘크리트의 최적배합비 선정

Determination of Structural Lightweight Concrete Mix Proportion for Floating Concrete Structures

  • Kim, Min Ook (Coastal Engineering Division, Korea Institute of Ocean Science and Technology) ;
  • Qian, Xudong (Centre for Offshore Research and Engineering, National University of Singapore) ;
  • Lee, Myung Kue (Department of Civil and Environmental Engineering, Jeonju University) ;
  • Park, Woo-Sun (Coastal Engineering Division, Korea Institute of Ocean Science and Technology) ;
  • Jeong, Shin Taek (Department of Civil and Environmental Engineering, Wonkwang University) ;
  • Oh, Nam Sun (Department of Ocean.Plant Construction Engineering, Mokpo National Maritime University)
  • 투고 : 2017.10.15
  • 심사 : 2017.12.11
  • 발행 : 2017.12.31
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초록

본 연구에서는 콘크리트 부유체 건설에 사용하기 위한 구조용 경량 콘크리트의 최적 배합비를 도출하기 위해 실험적 연구를 수행하였다. 경량콘크리트에 요구되는 설계압축강도 및 단위중량은 동적안정성 해석 및 기존에 건설된 부유식 구조물의 조사결과를 바탕으로 60 MPa, $1,800kg/m^3$로 각각 설정하였으며 슬럼프를 측정하여 워커빌리티를 조사하였다. 실험을 위해 대표적 인공경량골재인 expanded slate, expanded clay, expanded shale을 사용하여 설계조건을 만족할 때까지 콘크리트를 반복 타설하여 최적 배합비를 도출하였다. 콘크리트의 배합에 대하여 NT Build 492, ASTM C 1202와 같은 염소이온 침투 저항성 실험을 실시하였으며 결과분석을 통해 경량콘크리트의 내구성에 미치는 실리카흄과 고로 슬래그 미분말의 영향을 조사하였다. 실험결과, 실리카흄을 시멘트대비 10%로 치환하고 expanded slate 또는 expanded clay를 사용하여 제작한 경량콘크리트가 모든 조건을 만족하였다. 마지막으로 구조용 경량골재의 선정, 경량콘크리트의 제작 및 시공시에 유의할 점에 대하여 설명하였다.

This study aims to provide information for the design and use of structural lightweight concrete (SLWC) for floating concrete structures in a marine environment. An experimental program was set up and comprehensive experimental campaign were carried out to determine SLWC mix proportions that can satisfy specified concrete strength, density, and slump values all of them were determined from previous research. Comparisons with previous SLWC mix designs that have been utilized for actual floating concrete structures were made. Key aspects needed to be considered regarding to the use of SLWC for floating marine concrete structures were discussed.

키워드

참고문헌

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피인용 문헌

  1. Tensile Bond Characteristics between Underwater Coating Materials and Concrete Substrate vol.30, pp.6, 2018, https://doi.org/10.9765/KSCOE.2018.30.6.298