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응결시간제어용 배합과 수평분할을 고려한 고강도 매스콘크리트의 적용성 평가 KCI 등재

Applicability of High-strength Mass Concrete through Setting Time and Horizontally-divided Placement

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한국구조물진단유지관리공학회 논문집 (Journal of The Korea Institute for Structural Maintenance and Inspection)
한국구조물진단유지관리공학회 (The Korea Institute For Structural Maintenance and Inspection)
초록

In the current study, retarding type and standard type admixture design of concrete have been proposed to control the generation of hydration heat for foundation members that use high strengths concrete. Finite element analysis also has been conducted to understand the rational placing heights of concrete. In addition, real-size structures have experimented and their results were compared to the analytical results to evaluate the reducing effect of thermal stress . For a large 6.5 m×6.5 m×3.5 m member with retarding and standard type horizontal partition placement of concrete showed the manageable possibility of temperature difference within 25-degree Celcius between the middle and surface portion while the maximum temperature was 77-degree Celcius. Also, temperature cracking index from the finite element analysis appeared to be 1.49 that predicts no formation of cracking due to the effects of temperature. Finally, it appeared that horizontal partition placement of retarding and standard type concrete has the significant effect of reducing the thermal stress that generated by the hydration heat in the high strengths mass concrete.

저자
  • 조승호(단국대학교 부설 리모델링연구소 연구교수, 공학박사) | Seung-Ho Cho
  • 백인관(신동아건설(주) 건축사업본부 건축팀 과장, 공학박사) | Seung-Ho Cho
  • 이동하(신동아건설(주) 건축사업본부 건축팀 과장, 공학박사) | Dong-Ha Lee
  • 노영숙(서울과학기술대학교 건축학부 건축공학과 교수, 공학박사) | Young-Sook Roh Corresponding author