지하구조물의 열화방지를 위한 수밀성 콘크리트의 개발

Development of Low Permeable Concrete for the Control of Deterioration in Underground Structures

  • 백상현 (쌍용양회공업(주)중앙연구소 콘크리트연구실) ;
  • 박성수 (서울시 대현산 배수지 공사 감리단 신우Eng.) ;
  • 박종유 (서울시 대현산 배수지 공사 시공사 남광토건(주)) ;
  • 백원준 (쌍용양회공업(주) 레미콘팀) ;
  • 엄태선 (쌍용양회공업(주)중앙연구소 콘크리트연구실) ;
  • 최롱 (쌍용양회공업(주)중앙연구소)
  • 발행 : 1999.04.01

초록

In underground reinforced concrete structures, such as drainage structure, water and chloride ion penetrated into concrete through the cracks of concrete and its permeable property, cause the corrosion of reinforcing steel bar, which accelerates the expansive cracks and deterioration of concrete. It is necessary to control those deterioration of underground structure by improving its permeability and durability through the reasonable solutions in design, construction and materials. In the present study, fly ash concrete, which has good material properties in long-term period, is compared and studied with plain concrete using ordinary portland cement in terms of fundamental mechanical properties, permeability, drying shrinkage and durability. Also, the mix design and its properties of low permeable concrete using fly ash are reviewed. From this study, fly ash concrete can conctrol the penetration of water and chloride ion effectively by forming dense microstructure of concrete. Therefore, fly ash concrete may increase the long-term function, performance and serviceability of underground structures.

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