Analysis Study for the Determination of Optimized Block Size in Mass Concrete

매스콘크리트에서 최적의 타설 단면 결정을 위한 해석적 연구

  • 김진근 (정회원, 한국과학기술원 토목공학과) ;
  • 김상철 (정회원, 동아건설산업(주) 책임연구원, 공박) ;
  • 이두재 (정회원, 동아건설산업(주)) ;
  • 김국한 (정회원, 한국과학기술원 토목공학과)
  • Published : 1997.04.01

Abstract

Thermal stress induced by hydration heat may produce cracks in mass concrete structure, which can result in structural problems as well as bad appearance. To minimize crack occurrence in massive structural, thus, the study put an emphasis on the determination of optimized lift height and block size. In the parametric study different sizes and lift heights were used to measure the magnitudes of hydration heat and thermal stresses for 3 different types of concrete fabricated with 1 pure cement and 2 blended Portland cements. As a result of analysis. it was found that magnitude of hydration heat and the occurrence of thermal cracks depend on the restriction conditions and material characteristics, especially adiabatic material parameters. It was also found that optimized lift height and block size can be determined from an appropriate combination of the degree of inner and outer structural restrictions.

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